forked from AuroraMiddleware/gtk
4581 lines
129 KiB
C
4581 lines
129 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gdk/gdk.h"
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#ifdef GDK_WINDOWING_X11
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#include <X11/Xlib.h>
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#include <X11/keysym.h>
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#include "gdk/x11/gdkx.h"
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#ifdef XINPUT_2
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#include <X11/extensions/XInput2.h>
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#endif
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#endif
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#include "gtkdnd.h"
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#include "gtkiconhelperprivate.h"
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#include "gtkicontheme.h"
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#include "gtkinvisible.h"
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#include "gtkmain.h"
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#include "gtkplug.h"
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#include "gtktooltip.h"
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#include "gtkwindow.h"
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#include "gtkintl.h"
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#include "gtkselectionprivate.h"
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/**
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* SECTION:gtkdnd
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* @Short_description: Functions for controlling drag and drop handling
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* @Title: Drag and Drop
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*
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* GTK+ has a rich set of functions for doing inter-process
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* communication via the drag-and-drop metaphor.
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*
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* As well as the functions listed here, applications
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* may need to use some facilities provided for
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* [Selections][gtk3-Selections].
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* Also, the Drag and Drop API makes use of signals
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* in the #GtkWidget class.
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*/
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static GSList *source_widgets = NULL;
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typedef struct _GtkDragSourceSite GtkDragSourceSite;
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typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
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typedef struct _GtkDragDestSite GtkDragDestSite;
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typedef struct _GtkDragDestInfo GtkDragDestInfo;
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typedef struct _GtkDragAnim GtkDragAnim;
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typedef enum
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{
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GTK_DRAG_STATUS_DRAG,
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GTK_DRAG_STATUS_WAIT,
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GTK_DRAG_STATUS_DROP
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} GtkDragStatus;
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struct _GtkDragSourceSite
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{
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GdkModifierType start_button_mask;
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GtkTargetList *target_list; /* Targets for drag data */
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GdkDragAction actions; /* Possible actions */
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GtkIconHelper *icon_helper;
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/* Stored button press information to detect drag beginning */
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gint state;
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gint x, y;
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};
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struct _GtkDragSourceInfo
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{
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GtkWidget *widget;
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GtkTargetList *target_list; /* Targets for drag data */
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GdkDragAction possible_actions; /* Actions allowed by source */
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GdkDragContext *context; /* drag context */
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GtkWidget *icon_window; /* Window for drag */
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GtkWidget *fallback_icon; /* Window for drag used on other screens */
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GtkWidget *ipc_widget; /* GtkInvisible for grab, message passing */
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GdkCursor *cursor; /* Cursor for drag */
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gint hot_x, hot_y; /* Hot spot for drag */
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gint button; /* mouse button starting drag */
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GtkDragStatus status; /* drag status */
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GdkEvent *last_event; /* pending event */
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gint start_x, start_y; /* Initial position */
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gint cur_x, cur_y; /* Current Position */
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GdkScreen *cur_screen; /* Current screen for pointer */
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guint32 grab_time; /* timestamp for initial grab */
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GList *selections; /* selections we've claimed */
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GtkDragDestInfo *proxy_dest; /* Set if this is a proxy drag */
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guint update_idle; /* Idle function to update the drag */
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guint drop_timeout; /* Timeout for aborting drop */
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guint destroy_icon : 1; /* If true, destroy icon_window */
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guint have_grab : 1; /* Do we still have the pointer grab */
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GtkIconHelper *icon_helper;
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GdkCursor *drag_cursors[6];
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};
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struct _GtkDragDestSite
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{
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GtkDestDefaults flags;
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GtkTargetList *target_list;
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GdkDragAction actions;
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GdkWindow *proxy_window;
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GdkDragProtocol proxy_protocol;
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guint do_proxy : 1;
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guint proxy_coords : 1;
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guint have_drag : 1;
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guint track_motion : 1;
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};
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struct _GtkDragDestInfo
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{
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GtkWidget *widget; /* Widget in which drag is in */
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GdkDragContext *context; /* Drag context */
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GtkDragSourceInfo *proxy_source; /* Set if this is a proxy drag */
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GtkSelectionData *proxy_data; /* Set while retrieving proxied data */
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guint32 proxy_drop_time; /* Timestamp for proxied drop */
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guint proxy_drop_wait : 1; /* Set if we are waiting for a
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* status reply before sending
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* a proxied drop on.
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*/
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guint dropped : 1; /* Set after we receive a drop */
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gint drop_x, drop_y; /* Position of drop */
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};
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#define DROP_ABORT_TIME 300000
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#define ANIM_TIME (0.5 * 1000 * 1000) /* half a second */
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struct _GtkDragAnim
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{
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GtkDragSourceInfo *info;
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gint64 start_time;
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};
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typedef gboolean (* GtkDragDestCallback) (GtkWidget *widget,
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GdkDragContext *context,
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gint x,
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gint y,
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guint32 time);
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/* Enumeration for some targets we handle internally */
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enum {
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TARGET_DELETE = 0x40000002
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};
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/* Forward declarations */
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static void gtk_drag_get_event_actions (GdkEvent *event,
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gint button,
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GdkDragAction actions,
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GdkDragAction *suggested_action,
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GdkDragAction *possible_actions);
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static GdkCursor * gtk_drag_get_cursor (GtkWidget *widget,
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GdkDisplay *display,
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GdkDragAction action,
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GtkDragSourceInfo *info);
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static void gtk_drag_update_cursor (GtkDragSourceInfo *info);
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static GtkWidget *gtk_drag_get_ipc_widget (GtkWidget *widget);
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static GtkWidget *gtk_drag_get_ipc_widget_for_screen (GdkScreen *screen);
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static void gtk_drag_release_ipc_widget (GtkWidget *widget);
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static void gtk_drag_selection_received (GtkWidget *widget,
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GtkSelectionData *selection_data,
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guint time,
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gpointer data);
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static gboolean gtk_drag_find_widget (GtkWidget *widget,
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GdkDragContext *context,
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GtkDragDestInfo *info,
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gint x,
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gint y,
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guint32 time,
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GtkDragDestCallback callback);
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static void gtk_drag_proxy_begin (GtkWidget *widget,
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GtkDragDestInfo *dest_info,
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guint32 time);
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static void gtk_drag_dest_realized (GtkWidget *widget);
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static void gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
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GtkWidget *previous_toplevel);
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static void gtk_drag_dest_site_destroy (gpointer data);
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static void gtk_drag_dest_leave (GtkWidget *widget,
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GdkDragContext *context,
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guint time);
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static gboolean gtk_drag_dest_motion (GtkWidget *widget,
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GdkDragContext *context,
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gint x,
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gint y,
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guint time);
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static gboolean gtk_drag_dest_drop (GtkWidget *widget,
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GdkDragContext *context,
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gint x,
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gint y,
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guint time);
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static GtkDragDestInfo * gtk_drag_get_dest_info (GdkDragContext *context,
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gboolean create);
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static GtkDragSourceInfo *gtk_drag_get_source_info (GdkDragContext *context,
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gboolean create);
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static void gtk_drag_clear_source_info (GdkDragContext *context);
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static void gtk_drag_source_check_selection (GtkDragSourceInfo *info,
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GdkAtom selection,
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guint32 time);
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static void gtk_drag_source_release_selections (GtkDragSourceInfo *info,
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guint32 time);
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static void gtk_drag_drop (GtkDragSourceInfo *info,
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guint32 time);
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static void gtk_drag_drop_finished (GtkDragSourceInfo *info,
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GtkDragResult result,
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guint time);
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static void gtk_drag_cancel (GtkDragSourceInfo *info,
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GtkDragResult result,
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guint32 time);
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static gboolean gtk_drag_source_event_cb (GtkWidget *widget,
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GdkEvent *event,
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gpointer data);
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static void gtk_drag_source_site_destroy (gpointer data);
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static void gtk_drag_selection_get (GtkWidget *widget,
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GtkSelectionData *selection_data,
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guint sel_info,
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guint32 time,
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gpointer data);
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static void gtk_drag_anim_destroy (GtkDragAnim *anim);
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static gboolean gtk_drag_anim_tick (GtkWidget *widget,
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GdkFrameClock *frame_clock,
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gpointer data);
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static void gtk_drag_remove_icon (GtkDragSourceInfo *info);
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static void gtk_drag_source_info_destroy (GtkDragSourceInfo *info);
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static void gtk_drag_add_update_idle (GtkDragSourceInfo *info);
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static void gtk_drag_update (GtkDragSourceInfo *info,
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GdkScreen *screen,
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gint x_root,
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gint y_root,
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GdkEvent *event);
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static gboolean gtk_drag_motion_cb (GtkWidget *widget,
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GdkEventMotion *event,
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gpointer data);
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static gboolean gtk_drag_key_cb (GtkWidget *widget,
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GdkEventKey *event,
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gpointer data);
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static gboolean gtk_drag_grab_broken_event_cb (GtkWidget *widget,
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GdkEventGrabBroken *event,
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gpointer data);
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static void gtk_drag_grab_notify_cb (GtkWidget *widget,
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gboolean was_grabbed,
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gpointer data);
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static gboolean gtk_drag_button_release_cb (GtkWidget *widget,
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GdkEventButton *event,
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gpointer data);
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static gboolean gtk_drag_abort_timeout (gpointer data);
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static void set_icon_helper (GdkDragContext *context,
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GtkIconHelper *helper,
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gint hot_x,
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gint hot_y,
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gboolean force_window);
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/************************
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* Cursor and Icon data *
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************************/
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static struct {
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GdkDragAction action;
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const gchar *name;
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GdkPixbuf *pixbuf;
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GdkCursor *cursor;
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} drag_cursors[] = {
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{ GDK_ACTION_DEFAULT, NULL },
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{ GDK_ACTION_ASK, "dnd-ask", NULL, NULL },
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{ GDK_ACTION_COPY, "dnd-copy", NULL, NULL },
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{ GDK_ACTION_MOVE, "dnd-move", NULL, NULL },
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{ GDK_ACTION_LINK, "dnd-link", NULL, NULL },
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{ 0 , "dnd-none", NULL, NULL },
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};
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/*********************
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* Utility functions *
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*********************/
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static void
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set_can_change_screen (GtkWidget *widget,
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gboolean can_change_screen)
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{
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can_change_screen = can_change_screen != FALSE;
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g_object_set_data (G_OBJECT (widget), I_("gtk-dnd-can-change-screen"),
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GUINT_TO_POINTER (can_change_screen));
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}
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static gboolean
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get_can_change_screen (GtkWidget *widget)
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{
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return g_object_get_data (G_OBJECT (widget), "gtk-dnd-can-change-screen") != NULL;
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}
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static GtkWidget *
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gtk_drag_get_ipc_widget_for_screen (GdkScreen *screen)
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{
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GtkWidget *result;
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GSList *drag_widgets = g_object_get_data (G_OBJECT (screen),
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"gtk-dnd-ipc-widgets");
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if (drag_widgets)
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{
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GSList *tmp = drag_widgets;
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result = drag_widgets->data;
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drag_widgets = drag_widgets->next;
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g_object_set_data (G_OBJECT (screen),
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I_("gtk-dnd-ipc-widgets"),
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drag_widgets);
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g_slist_free_1 (tmp);
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}
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else
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{
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result = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_window_set_screen (GTK_WINDOW (result), screen);
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gtk_window_resize (GTK_WINDOW (result), 1, 1);
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gtk_window_move (GTK_WINDOW (result), -99, -99);
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gtk_widget_show (result);
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}
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return result;
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}
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static GtkWidget *
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gtk_drag_get_ipc_widget (GtkWidget *widget)
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{
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GtkWidget *result;
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GtkWidget *toplevel;
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||
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result = gtk_drag_get_ipc_widget_for_screen (gtk_widget_get_screen (widget));
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toplevel = gtk_widget_get_toplevel (widget);
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if (GTK_IS_WINDOW (toplevel))
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{
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if (gtk_window_has_group (GTK_WINDOW (toplevel)))
|
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gtk_window_group_add_window (gtk_window_get_group (GTK_WINDOW (toplevel)),
|
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GTK_WINDOW (result));
|
||
}
|
||
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return result;
|
||
}
|
||
|
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#if defined (GDK_WINDOWING_X11)
|
||
|
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/*
|
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* We want to handle a handful of keys during DND, e.g. Escape to abort.
|
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* Grabbing the keyboard has the unfortunate side-effect of preventing
|
||
* useful things such as using Alt-Tab to cycle between windows or
|
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* switching workspaces. Therefore, we just grab the few keys we are
|
||
* interested in. Note that we need to put the grabs on the root window
|
||
* in order for them to still work when the focus is moved to another
|
||
* app/workspace.
|
||
*
|
||
* GDK needs a little help to successfully deliver root key events...
|
||
*/
|
||
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static GdkFilterReturn
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root_key_filter (GdkXEvent *xevent,
|
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GdkEvent *event,
|
||
gpointer data)
|
||
{
|
||
XEvent *ev = (XEvent *) xevent;
|
||
|
||
if ((ev->type == KeyPress || ev->type == KeyRelease) &&
|
||
ev->xkey.root == ev->xkey.window)
|
||
ev->xkey.window = (Window)data;
|
||
else if (ev->type == GenericEvent)
|
||
{
|
||
XGenericEventCookie *cookie;
|
||
XIDeviceEvent *dev;
|
||
|
||
cookie = &ev->xcookie;
|
||
dev = (XIDeviceEvent *) cookie->data;
|
||
|
||
if (dev->evtype == XI_KeyPress ||
|
||
dev->evtype == XI_KeyRelease)
|
||
dev->event = (Window)data;
|
||
}
|
||
|
||
return GDK_FILTER_CONTINUE;
|
||
}
|
||
|
||
typedef struct {
|
||
gint keysym;
|
||
gint modifiers;
|
||
} GrabKey;
|
||
|
||
static GrabKey grab_keys[] = {
|
||
{ XK_Escape, 0 },
|
||
{ XK_space, 0 },
|
||
{ XK_KP_Space, 0 },
|
||
{ XK_Return, 0 },
|
||
{ XK_KP_Enter, 0 },
|
||
{ XK_Up, 0 },
|
||
{ XK_Up, Mod1Mask },
|
||
{ XK_Down, 0 },
|
||
{ XK_Down, Mod1Mask },
|
||
{ XK_Left, 0 },
|
||
{ XK_Left, Mod1Mask },
|
||
{ XK_Right, 0 },
|
||
{ XK_Right, Mod1Mask },
|
||
{ XK_KP_Up, 0 },
|
||
{ XK_KP_Up, Mod1Mask },
|
||
{ XK_KP_Down, 0 },
|
||
{ XK_KP_Down, Mod1Mask },
|
||
{ XK_KP_Left, 0 },
|
||
{ XK_KP_Left, Mod1Mask },
|
||
{ XK_KP_Right, 0 },
|
||
{ XK_KP_Right, Mod1Mask }
|
||
};
|
||
|
||
static void
|
||
grab_dnd_keys (GtkWidget *widget,
|
||
GdkDevice *device,
|
||
guint32 time)
|
||
{
|
||
guint i;
|
||
GdkWindow *window, *root;
|
||
gint keycode;
|
||
#ifdef XINPUT_2
|
||
gint deviceid;
|
||
XIGrabModifiers mods;
|
||
gint num_mods;
|
||
XIEventMask evmask;
|
||
unsigned char mask[(XI_LASTEVENT + 7)/8];
|
||
gboolean using_xi2;
|
||
|
||
deviceid = gdk_x11_device_get_id (device);
|
||
|
||
if (GDK_IS_X11_DEVICE_MANAGER_XI2 (gdk_display_get_device_manager (gtk_widget_get_display (widget))))
|
||
using_xi2 = TRUE;
|
||
else
|
||
using_xi2 = FALSE;
|
||
#endif
|
||
|
||
window = gtk_widget_get_window (widget);
|
||
if (!GDK_IS_X11_WINDOW (window))
|
||
{
|
||
gdk_device_grab (device,
|
||
gtk_widget_get_window (widget),
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
|
||
NULL, time);
|
||
return;
|
||
}
|
||
|
||
|
||
root = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
|
||
|
||
gdk_error_trap_push ();
|
||
|
||
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
|
||
{
|
||
keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (window), grab_keys[i].keysym);
|
||
if (keycode == NoSymbol)
|
||
continue;
|
||
|
||
#ifdef XINPUT_2
|
||
if (using_xi2)
|
||
{
|
||
memset (mask, 0, sizeof (mask));
|
||
XISetMask (mask, XI_KeyPress);
|
||
XISetMask (mask, XI_KeyRelease);
|
||
|
||
evmask.deviceid = deviceid;
|
||
evmask.mask_len = sizeof (mask);
|
||
evmask.mask = mask;
|
||
|
||
num_mods = 1;
|
||
mods.modifiers = grab_keys[i].modifiers;
|
||
|
||
XIGrabKeycode (GDK_WINDOW_XDISPLAY (window),
|
||
deviceid,
|
||
keycode,
|
||
GDK_WINDOW_XID (root),
|
||
GrabModeAsync,
|
||
GrabModeAsync,
|
||
False,
|
||
&evmask,
|
||
num_mods,
|
||
&mods);
|
||
}
|
||
else
|
||
#endif
|
||
XGrabKey (GDK_WINDOW_XDISPLAY (window),
|
||
keycode, grab_keys[i].modifiers,
|
||
GDK_WINDOW_XID (root),
|
||
FALSE,
|
||
GrabModeAsync,
|
||
GrabModeAsync);
|
||
}
|
||
|
||
gdk_flush ();
|
||
gdk_error_trap_pop_ignored ();
|
||
|
||
gdk_window_add_filter (NULL, root_key_filter, (gpointer) GDK_WINDOW_XID (window));
|
||
}
|
||
|
||
static void
|
||
ungrab_dnd_keys (GtkWidget *widget,
|
||
GdkDevice *device,
|
||
guint32 time)
|
||
{
|
||
guint i;
|
||
GdkWindow *window, *root;
|
||
gint keycode;
|
||
#ifdef XINPUT_2
|
||
XIGrabModifiers mods;
|
||
gint num_mods;
|
||
gint deviceid;
|
||
gboolean using_xi2;
|
||
|
||
deviceid = gdk_x11_device_get_id (device);
|
||
if (GDK_IS_X11_DEVICE_MANAGER_XI2 (gdk_display_get_device_manager (gtk_widget_get_display (widget))))
|
||
using_xi2 = TRUE;
|
||
else
|
||
using_xi2 = FALSE;
|
||
#endif
|
||
|
||
window = gtk_widget_get_window (widget);
|
||
if (!GDK_IS_X11_WINDOW (window))
|
||
{
|
||
gdk_device_ungrab (device, time);
|
||
return;
|
||
}
|
||
|
||
root = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
|
||
|
||
gdk_window_remove_filter (NULL, root_key_filter, (gpointer) GDK_WINDOW_XID (window));
|
||
|
||
gdk_error_trap_push ();
|
||
|
||
for (i = 0; i < G_N_ELEMENTS (grab_keys); ++i)
|
||
{
|
||
keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (window), grab_keys[i].keysym);
|
||
if (keycode == NoSymbol)
|
||
continue;
|
||
|
||
#ifdef XINPUT_2
|
||
if (using_xi2)
|
||
{
|
||
num_mods = 1;
|
||
mods.modifiers = grab_keys[i].modifiers;
|
||
|
||
XIUngrabKeycode (GDK_WINDOW_XDISPLAY (window),
|
||
deviceid,
|
||
keycode,
|
||
GDK_WINDOW_XID (root),
|
||
num_mods,
|
||
&mods);
|
||
}
|
||
else
|
||
#endif
|
||
XUngrabKey (GDK_WINDOW_XDISPLAY (window),
|
||
keycode, grab_keys[i].modifiers,
|
||
GDK_WINDOW_XID (root));
|
||
}
|
||
|
||
gdk_flush ();
|
||
gdk_error_trap_pop_ignored ();
|
||
}
|
||
|
||
#else /* !GDK_WINDOWING_X11 */
|
||
|
||
static void
|
||
grab_dnd_keys (GtkWidget *widget,
|
||
GdkDevice *device,
|
||
guint32 time)
|
||
{
|
||
gdk_device_grab (device,
|
||
gtk_widget_get_window (widget),
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
|
||
NULL, time);
|
||
}
|
||
|
||
static void
|
||
ungrab_dnd_keys (GtkWidget *widget,
|
||
GdkDevice *device,
|
||
guint32 time)
|
||
{
|
||
gdk_device_ungrab (device, time);
|
||
}
|
||
|
||
#endif /* GDK_WINDOWING_X11 */
|
||
|
||
|
||
/***************************************************************
|
||
* gtk_drag_release_ipc_widget:
|
||
* Releases widget retrieved with gtk_drag_get_ipc_widget ()
|
||
* arguments:
|
||
* widget: the widget to release.
|
||
* results:
|
||
***************************************************************/
|
||
|
||
static void
|
||
gtk_drag_release_ipc_widget (GtkWidget *widget)
|
||
{
|
||
GtkWindow *window = GTK_WINDOW (widget);
|
||
GdkScreen *screen = gtk_widget_get_screen (widget);
|
||
GdkDragContext *context = g_object_get_data (G_OBJECT (widget), "drag-context");
|
||
GSList *drag_widgets = g_object_get_data (G_OBJECT (screen),
|
||
"gtk-dnd-ipc-widgets");
|
||
GdkDevice *pointer, *keyboard;
|
||
|
||
if (context)
|
||
{
|
||
pointer = gdk_drag_context_get_device (context);
|
||
keyboard = gdk_device_get_associated_device (pointer);
|
||
|
||
if (keyboard)
|
||
ungrab_dnd_keys (widget, keyboard, GDK_CURRENT_TIME);
|
||
}
|
||
|
||
if (gtk_window_has_group (window))
|
||
gtk_window_group_remove_window (gtk_window_get_group (window),
|
||
window);
|
||
drag_widgets = g_slist_prepend (drag_widgets, widget);
|
||
g_object_set_data (G_OBJECT (screen),
|
||
I_("gtk-dnd-ipc-widgets"),
|
||
drag_widgets);
|
||
}
|
||
|
||
static guint32
|
||
gtk_drag_get_event_time (GdkEvent *event)
|
||
{
|
||
guint32 tm = GDK_CURRENT_TIME;
|
||
|
||
if (event)
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
tm = event->motion.time; break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
tm = event->button.time; break;
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
tm = event->key.time; break;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
tm = event->crossing.time; break;
|
||
case GDK_PROPERTY_NOTIFY:
|
||
tm = event->property.time; break;
|
||
case GDK_SELECTION_CLEAR:
|
||
case GDK_SELECTION_REQUEST:
|
||
case GDK_SELECTION_NOTIFY:
|
||
tm = event->selection.time; break;
|
||
case GDK_PROXIMITY_IN:
|
||
case GDK_PROXIMITY_OUT:
|
||
tm = event->proximity.time; break;
|
||
default: /* use current time */
|
||
break;
|
||
}
|
||
|
||
return tm;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_get_event_actions (GdkEvent *event,
|
||
gint button,
|
||
GdkDragAction actions,
|
||
GdkDragAction *suggested_action,
|
||
GdkDragAction *possible_actions)
|
||
{
|
||
*suggested_action = 0;
|
||
*possible_actions = 0;
|
||
|
||
if (event)
|
||
{
|
||
GdkModifierType state = 0;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_MOTION_NOTIFY:
|
||
state = event->motion.state;
|
||
break;
|
||
case GDK_BUTTON_PRESS:
|
||
case GDK_2BUTTON_PRESS:
|
||
case GDK_3BUTTON_PRESS:
|
||
case GDK_BUTTON_RELEASE:
|
||
state = event->button.state;
|
||
break;
|
||
case GDK_KEY_PRESS:
|
||
case GDK_KEY_RELEASE:
|
||
state = event->key.state;
|
||
break;
|
||
case GDK_ENTER_NOTIFY:
|
||
case GDK_LEAVE_NOTIFY:
|
||
state = event->crossing.state;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if ((button == GDK_BUTTON_MIDDLE || button == GDK_BUTTON_SECONDARY) && (actions & GDK_ACTION_ASK))
|
||
{
|
||
*suggested_action = GDK_ACTION_ASK;
|
||
*possible_actions = actions;
|
||
}
|
||
else if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
|
||
{
|
||
if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
|
||
{
|
||
if (actions & GDK_ACTION_LINK)
|
||
{
|
||
*suggested_action = GDK_ACTION_LINK;
|
||
*possible_actions = GDK_ACTION_LINK;
|
||
}
|
||
}
|
||
else if (state & GDK_CONTROL_MASK)
|
||
{
|
||
if (actions & GDK_ACTION_COPY)
|
||
{
|
||
*suggested_action = GDK_ACTION_COPY;
|
||
*possible_actions = GDK_ACTION_COPY;
|
||
}
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
if (actions & GDK_ACTION_MOVE)
|
||
{
|
||
*suggested_action = GDK_ACTION_MOVE;
|
||
*possible_actions = GDK_ACTION_MOVE;
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*possible_actions = actions;
|
||
|
||
if ((state & (GDK_MOD1_MASK)) && (actions & GDK_ACTION_ASK))
|
||
*suggested_action = GDK_ACTION_ASK;
|
||
else if (actions & GDK_ACTION_COPY)
|
||
*suggested_action = GDK_ACTION_COPY;
|
||
else if (actions & GDK_ACTION_MOVE)
|
||
*suggested_action = GDK_ACTION_MOVE;
|
||
else if (actions & GDK_ACTION_LINK)
|
||
*suggested_action = GDK_ACTION_LINK;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
*possible_actions = actions;
|
||
|
||
if (actions & GDK_ACTION_COPY)
|
||
*suggested_action = GDK_ACTION_COPY;
|
||
else if (actions & GDK_ACTION_MOVE)
|
||
*suggested_action = GDK_ACTION_MOVE;
|
||
else if (actions & GDK_ACTION_LINK)
|
||
*suggested_action = GDK_ACTION_LINK;
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_can_use_rgba_cursor (GdkDisplay *display,
|
||
gint width,
|
||
gint height)
|
||
{
|
||
guint max_width, max_height;
|
||
|
||
if (!gdk_display_supports_cursor_color (display))
|
||
return FALSE;
|
||
|
||
if (!gdk_display_supports_cursor_alpha (display))
|
||
return FALSE;
|
||
|
||
gdk_display_get_maximal_cursor_size (display,
|
||
&max_width,
|
||
&max_height);
|
||
if (width > max_width || height > max_height)
|
||
{
|
||
/* can't use rgba cursor (too large) */
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
ensure_drag_cursor_pixbuf (int i)
|
||
{
|
||
if (drag_cursors[i].pixbuf == NULL)
|
||
{
|
||
char *path = g_strconcat ("/org/gtk/libgtk/cursor/", drag_cursors[i].name, ".png", NULL);
|
||
GInputStream *stream = g_resources_open_stream (path, 0, NULL);
|
||
if (stream != NULL)
|
||
{
|
||
drag_cursors[i].pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, NULL);
|
||
g_object_unref (stream);
|
||
}
|
||
g_free (path);
|
||
}
|
||
}
|
||
|
||
static void
|
||
get_surface_size (cairo_surface_t *surface,
|
||
int *width,
|
||
int *height)
|
||
{
|
||
double x_scale, y_scale;
|
||
|
||
x_scale = y_scale = 1;
|
||
|
||
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
|
||
cairo_surface_get_device_scale (surface, &x_scale, &y_scale);
|
||
#endif
|
||
|
||
/* Assume any set scaling is icon scale */
|
||
*width =
|
||
ceil (cairo_image_surface_get_width (surface) / x_scale);
|
||
*height =
|
||
ceil (cairo_image_surface_get_height (surface) / y_scale);
|
||
}
|
||
|
||
static GdkCursor *
|
||
gtk_drag_get_cursor (GtkWidget *widget,
|
||
GdkDisplay *display,
|
||
GdkDragAction action,
|
||
GtkDragSourceInfo *info)
|
||
{
|
||
gint i;
|
||
|
||
/* reconstruct the cursors for each new drag (thus !info),
|
||
* to catch cursor theme changes
|
||
*/
|
||
if (!info)
|
||
{
|
||
for (i = 0 ; i < G_N_ELEMENTS (drag_cursors) - 1; i++)
|
||
if (drag_cursors[i].cursor != NULL)
|
||
{
|
||
g_object_unref (drag_cursors[i].cursor);
|
||
drag_cursors[i].cursor = NULL;
|
||
}
|
||
}
|
||
|
||
for (i = 0 ; i < G_N_ELEMENTS (drag_cursors) - 1; i++)
|
||
if (drag_cursors[i].action == action)
|
||
break;
|
||
|
||
if (drag_cursors[i].cursor != NULL)
|
||
{
|
||
if (display != gdk_cursor_get_display (drag_cursors[i].cursor))
|
||
{
|
||
g_object_unref (drag_cursors[i].cursor);
|
||
drag_cursors[i].cursor = NULL;
|
||
}
|
||
}
|
||
|
||
if (drag_cursors[i].cursor == NULL)
|
||
drag_cursors[i].cursor = gdk_cursor_new_from_name (display, drag_cursors[i].name);
|
||
|
||
if (drag_cursors[i].cursor == NULL)
|
||
{
|
||
ensure_drag_cursor_pixbuf (i);
|
||
drag_cursors[i].cursor = gdk_cursor_new_from_pixbuf (display, drag_cursors[i].pixbuf, 0, 0);
|
||
}
|
||
|
||
if (info && info->icon_helper)
|
||
{
|
||
gint cursor_width, cursor_height;
|
||
gint icon_width, icon_height;
|
||
gint width, height;
|
||
cairo_surface_t *icon_surface, *cursor_surface;
|
||
gdouble hot_x, hot_y;
|
||
gint icon_x, icon_y, ref_x, ref_y;
|
||
gint scale;
|
||
|
||
if (info->drag_cursors[i] != NULL)
|
||
{
|
||
if (display == gdk_cursor_get_display (info->drag_cursors[i]))
|
||
return info->drag_cursors[i];
|
||
|
||
g_object_unref (info->drag_cursors[i]);
|
||
info->drag_cursors[i] = NULL;
|
||
}
|
||
|
||
scale = gtk_widget_get_scale_factor (widget);
|
||
_gtk_icon_helper_get_size (info->icon_helper,
|
||
gtk_widget_get_style_context (widget),
|
||
&icon_width, &icon_height);
|
||
icon_surface = _gtk_icon_helper_ensure_surface (info->icon_helper,
|
||
gtk_widget_get_style_context (widget));
|
||
|
||
icon_x = info->hot_x;
|
||
icon_y = info->hot_y;
|
||
|
||
hot_x = hot_y = 0;
|
||
cursor_surface = gdk_cursor_get_surface (drag_cursors[i].cursor,
|
||
&hot_x, &hot_y);
|
||
if (!cursor_surface)
|
||
{
|
||
ensure_drag_cursor_pixbuf (i);
|
||
cursor_surface = gdk_cairo_surface_create_from_pixbuf (drag_cursors[i].pixbuf, 1, NULL);
|
||
}
|
||
else
|
||
{
|
||
#if 0
|
||
/* The code below is an attempt to let cursor themes
|
||
* determine the attachment of the icon to enable things
|
||
* like the following:
|
||
*
|
||
* +-----+
|
||
* | |
|
||
* | ||
|
||
* +-----+|
|
||
* ---+
|
||
*
|
||
* It does not work since Xcursor doesn't allow to attach
|
||
* any additional information to cursors in a retrievable
|
||
* way (there are comments, but no way to get at them
|
||
* short of searching for the actual cursor file).
|
||
* If this code ever gets used, the icon_window placement
|
||
* must be changed to recognize these placement options
|
||
* as well. Note that this code ignores info->hot_x/y.
|
||
*/
|
||
for (j = 0; j < 10; j++)
|
||
{
|
||
const gchar *opt;
|
||
gchar key[32];
|
||
gchar **toks;
|
||
GtkAnchorType icon_anchor;
|
||
|
||
g_snprintf (key, 32, "comment%d", j);
|
||
opt = gdk_pixbuf_get_option (cursor_pixbuf, key);
|
||
if (opt && g_str_has_prefix ("icon-attach:", opt))
|
||
{
|
||
toks = g_strsplit (opt + strlen ("icon-attach:"), "'", -1);
|
||
if (g_strv_length (toks) != 3)
|
||
{
|
||
g_strfreev (toks);
|
||
break;
|
||
}
|
||
icon_anchor = atoi (toks[0]);
|
||
icon_x = atoi (toks[1]);
|
||
icon_y = atoi (toks[2]);
|
||
|
||
switch (icon_anchor)
|
||
{
|
||
case GTK_ANCHOR_NORTH:
|
||
case GTK_ANCHOR_CENTER:
|
||
case GTK_ANCHOR_SOUTH:
|
||
icon_x += icon_width / 2;
|
||
break;
|
||
case GTK_ANCHOR_NORTH_EAST:
|
||
case GTK_ANCHOR_EAST:
|
||
case GTK_ANCHOR_SOUTH_EAST:
|
||
icon_x += icon_width;
|
||
break;
|
||
default: ;
|
||
}
|
||
|
||
switch (icon_anchor)
|
||
{
|
||
case GTK_ANCHOR_WEST:
|
||
case GTK_ANCHOR_CENTER:
|
||
case GTK_ANCHOR_EAST:
|
||
icon_y += icon_height / 2;
|
||
break;
|
||
case GTK_ANCHOR_SOUTH_WEST:
|
||
case GTK_ANCHOR_SOUTH:
|
||
case GTK_ANCHOR_SOUTH_EAST:
|
||
icon_x += icon_height;
|
||
break;
|
||
default: ;
|
||
}
|
||
|
||
g_strfreev (toks);
|
||
break;
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
get_surface_size (cursor_surface, &cursor_width, &cursor_height);
|
||
|
||
ref_x = MAX (hot_x, icon_x);
|
||
ref_y = MAX (hot_y, icon_y);
|
||
width = ref_x + MAX (cursor_width - hot_x, icon_width - icon_x);
|
||
height = ref_y + MAX (cursor_height - hot_y, icon_height - icon_y);
|
||
|
||
if (gtk_drag_can_use_rgba_cursor (display, width * scale, height * scale))
|
||
{
|
||
cairo_surface_t *surface;
|
||
cairo_t *cr;
|
||
|
||
/* Composite cursor and icon so that both hotspots
|
||
* end up at (ref_x, ref_y)
|
||
*/
|
||
surface =
|
||
gdk_window_create_similar_image_surface (NULL,
|
||
CAIRO_FORMAT_ARGB32,
|
||
width * scale, height * scale, scale);
|
||
|
||
cr = cairo_create (surface);
|
||
cairo_set_source_surface (cr, icon_surface,
|
||
ref_x - icon_x, ref_y - icon_y);
|
||
cairo_paint (cr);
|
||
|
||
cairo_set_source_surface (cr, cursor_surface,
|
||
ref_x - hot_x, ref_y - hot_y);
|
||
cairo_paint (cr);
|
||
|
||
cairo_destroy (cr);
|
||
|
||
info->drag_cursors[i] =
|
||
gdk_cursor_new_from_surface (display, surface, ref_x, ref_y);
|
||
|
||
cairo_surface_destroy (surface);
|
||
}
|
||
|
||
cairo_surface_destroy (cursor_surface);
|
||
cairo_surface_destroy (icon_surface);
|
||
|
||
if (info->drag_cursors[i] != NULL)
|
||
return info->drag_cursors[i];
|
||
}
|
||
|
||
return drag_cursors[i].cursor;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_update_cursor (GtkDragSourceInfo *info)
|
||
{
|
||
GdkCursor *cursor;
|
||
gint i;
|
||
|
||
if (!info->have_grab)
|
||
return;
|
||
|
||
for (i = 0 ; i < G_N_ELEMENTS (drag_cursors) - 1; i++)
|
||
if (info->cursor == drag_cursors[i].cursor ||
|
||
info->cursor == info->drag_cursors[i])
|
||
break;
|
||
|
||
if (i == G_N_ELEMENTS (drag_cursors))
|
||
return;
|
||
|
||
cursor = gtk_drag_get_cursor (info->widget,
|
||
gdk_cursor_get_display (info->cursor),
|
||
drag_cursors[i].action, info);
|
||
|
||
if (cursor != info->cursor)
|
||
{
|
||
GdkDevice *pointer;
|
||
|
||
pointer = gdk_drag_context_get_device (info->context);
|
||
gdk_device_grab (pointer,
|
||
gtk_widget_get_window (info->ipc_widget),
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
|
||
cursor, info->grab_time);
|
||
info->cursor = cursor;
|
||
}
|
||
}
|
||
|
||
/********************
|
||
* Destination side *
|
||
********************/
|
||
|
||
/**
|
||
* gtk_drag_get_data: (method)
|
||
* @widget: the widget that will receive the
|
||
* #GtkWidget::drag-data-received signal.
|
||
* @context: the drag context
|
||
* @target: the target (form of the data) to retrieve.
|
||
* @time_: a timestamp for retrieving the data. This will
|
||
* generally be the time received in a #GtkWidget::drag-motion"
|
||
* or #GtkWidget::drag-drop" signal.
|
||
*
|
||
* Gets the data associated with a drag. When the data
|
||
* is received or the retrieval fails, GTK+ will emit a
|
||
* #GtkWidget::drag-data-received signal. Failure of the retrieval
|
||
* is indicated by the length field of the @selection_data
|
||
* signal parameter being negative. However, when gtk_drag_get_data()
|
||
* is called implicitely because the %GTK_DEST_DEFAULT_DROP was set,
|
||
* then the widget will not receive notification of failed
|
||
* drops.
|
||
*/
|
||
void
|
||
gtk_drag_get_data (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
GdkAtom target,
|
||
guint32 time_)
|
||
{
|
||
GtkWidget *selection_widget;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
|
||
selection_widget = gtk_drag_get_ipc_widget (widget);
|
||
|
||
g_object_ref (context);
|
||
g_object_ref (widget);
|
||
|
||
g_signal_connect (selection_widget, "selection-received",
|
||
G_CALLBACK (gtk_drag_selection_received), widget);
|
||
|
||
g_object_set_data (G_OBJECT (selection_widget), I_("drag-context"), context);
|
||
|
||
gtk_selection_convert (selection_widget,
|
||
gdk_drag_get_selection (context),
|
||
target,
|
||
time_);
|
||
}
|
||
|
||
|
||
/**
|
||
* gtk_drag_get_source_widget: (method)
|
||
* @context: a (destination side) drag context
|
||
*
|
||
* Determines the source widget for a drag.
|
||
*
|
||
* Returns: (transfer none): if the drag is occurring
|
||
* within a single application, a pointer to the source widget.
|
||
* Otherwise, %NULL.
|
||
*/
|
||
GtkWidget *
|
||
gtk_drag_get_source_widget (GdkDragContext *context)
|
||
{
|
||
GSList *tmp_list;
|
||
|
||
g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), NULL);
|
||
|
||
tmp_list = source_widgets;
|
||
while (tmp_list)
|
||
{
|
||
GtkWidget *ipc_widget = tmp_list->data;
|
||
|
||
if (gtk_widget_get_window (ipc_widget) == gdk_drag_context_get_source_window (context))
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
info = g_object_get_data (G_OBJECT (ipc_widget), "gtk-info");
|
||
|
||
return info ? info->widget : NULL;
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_finish: (method)
|
||
* @context: the drag context.
|
||
* @success: a flag indicating whether the drop was successful
|
||
* @del: a flag indicating whether the source should delete the
|
||
* original data. (This should be %TRUE for a move)
|
||
* @time_: the timestamp from the #GtkWidget::drag-drop signal.
|
||
*
|
||
* Informs the drag source that the drop is finished, and
|
||
* that the data of the drag will no longer be required.
|
||
*/
|
||
void
|
||
gtk_drag_finish (GdkDragContext *context,
|
||
gboolean success,
|
||
gboolean del,
|
||
guint32 time)
|
||
{
|
||
GdkAtom target = GDK_NONE;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
|
||
if (success && del)
|
||
{
|
||
target = gdk_atom_intern_static_string ("DELETE");
|
||
}
|
||
|
||
if (target != GDK_NONE)
|
||
{
|
||
GtkWidget *selection_widget = gtk_drag_get_ipc_widget_for_screen (gdk_window_get_screen (gdk_drag_context_get_source_window (context)));
|
||
|
||
g_object_ref (context);
|
||
|
||
g_object_set_data (G_OBJECT (selection_widget), I_("drag-context"), context);
|
||
g_signal_connect (selection_widget, "selection-received",
|
||
G_CALLBACK (gtk_drag_selection_received),
|
||
NULL);
|
||
|
||
gtk_selection_convert (selection_widget,
|
||
gdk_drag_get_selection (context),
|
||
target,
|
||
time);
|
||
}
|
||
|
||
if (!(success && del))
|
||
gdk_drop_finish (context, success, time);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_highlight_draw:
|
||
* Callback for expose_event for highlighted widgets.
|
||
* arguments:
|
||
* widget:
|
||
* event:
|
||
* data:
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static gboolean
|
||
gtk_drag_highlight_draw (GtkWidget *widget,
|
||
cairo_t *cr,
|
||
gpointer data)
|
||
{
|
||
int width = gtk_widget_get_allocated_width (widget);
|
||
int height = gtk_widget_get_allocated_height (widget);
|
||
GtkStyleContext *context;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_DND);
|
||
|
||
gtk_render_frame (context, cr, 0, 0, width, height);
|
||
|
||
gtk_style_context_restore (context);
|
||
|
||
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
|
||
cairo_set_line_width (cr, 1.0);
|
||
cairo_rectangle (cr,
|
||
0.5, 0.5,
|
||
width - 1, height - 1);
|
||
cairo_stroke (cr);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_highlight: (method)
|
||
* @widget: a widget to highlight
|
||
*
|
||
* Draws a highlight around a widget. This will attach
|
||
* handlers to #GtkWidget::draw, so the highlight
|
||
* will continue to be displayed until gtk_drag_unhighlight()
|
||
* is called.
|
||
*/
|
||
void
|
||
gtk_drag_highlight (GtkWidget *widget)
|
||
{
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
g_signal_connect_after (widget, "draw",
|
||
G_CALLBACK (gtk_drag_highlight_draw),
|
||
NULL);
|
||
|
||
gtk_widget_queue_draw (widget);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_unhighlight: (method)
|
||
* @widget: a widget to remove the highlight from.
|
||
*
|
||
* Removes a highlight set by gtk_drag_highlight() from
|
||
* a widget.
|
||
*/
|
||
void
|
||
gtk_drag_unhighlight (GtkWidget *widget)
|
||
{
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_highlight_draw,
|
||
NULL);
|
||
|
||
gtk_widget_queue_draw (widget);
|
||
}
|
||
|
||
static void
|
||
gtk_drag_dest_set_internal (GtkWidget *widget,
|
||
GtkDragDestSite *site)
|
||
{
|
||
GtkDragDestSite *old_site;
|
||
|
||
g_return_if_fail (widget != NULL);
|
||
|
||
/* HACK, do this in the destroy */
|
||
old_site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
if (old_site)
|
||
{
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_dest_realized,
|
||
old_site);
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_dest_hierarchy_changed,
|
||
old_site);
|
||
|
||
site->track_motion = old_site->track_motion;
|
||
}
|
||
|
||
if (gtk_widget_get_realized (widget))
|
||
gtk_drag_dest_realized (widget);
|
||
|
||
g_signal_connect (widget, "realize",
|
||
G_CALLBACK (gtk_drag_dest_realized), site);
|
||
g_signal_connect (widget, "hierarchy-changed",
|
||
G_CALLBACK (gtk_drag_dest_hierarchy_changed), site);
|
||
|
||
g_object_set_data_full (G_OBJECT (widget), I_("gtk-drag-dest"),
|
||
site, gtk_drag_dest_site_destroy);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_set: (method)
|
||
* @widget: a #GtkWidget
|
||
* @flags: which types of default drag behavior to use
|
||
* @targets: (allow-none) (array length=n_targets): a pointer to an array of
|
||
* #GtkTargetEntrys indicating the drop types that this @widget will
|
||
* accept, or %NULL. Later you can access the list with
|
||
* gtk_drag_dest_get_target_list() and gtk_drag_dest_find_target().
|
||
* @n_targets: the number of entries in @targets
|
||
* @actions: a bitmask of possible actions for a drop onto this @widget.
|
||
*
|
||
* Sets a widget as a potential drop destination, and adds default behaviors.
|
||
*
|
||
* The default behaviors listed in @flags have an effect similar
|
||
* to installing default handlers for the widget’s drag-and-drop signals
|
||
* (#GtkWidget::drag-motion, #GtkWidget::drag-drop, ...). They all exist
|
||
* for convenience. When passing #GTK_DEST_DEFAULT_ALL for instance it is
|
||
* sufficient to connect to the widget’s #GtkWidget::drag-data-received
|
||
* signal to get primitive, but consistent drag-and-drop support.
|
||
*
|
||
* Things become more complicated when you try to preview the dragged data,
|
||
* as described in the documentation for #GtkWidget::drag-motion. The default
|
||
* behaviors described by @flags make some assumptions, that can conflict
|
||
* with your own signal handlers. For instance #GTK_DEST_DEFAULT_DROP causes
|
||
* invokations of gdk_drag_status() in the context of #GtkWidget::drag-motion,
|
||
* and invokations of gtk_drag_finish() in #GtkWidget::drag-data-received.
|
||
* Especially the later is dramatic, when your own #GtkWidget::drag-motion
|
||
* handler calls gtk_drag_get_data() to inspect the dragged data.
|
||
*
|
||
* There’s no way to set a default action here, you can use the
|
||
* #GtkWidget::drag-motion callback for that. Here’s an example which selects
|
||
* the action to use depending on whether the control key is pressed or not:
|
||
* |[<!-- language="C" -->
|
||
* static void
|
||
* drag_motion (GtkWidget *widget,
|
||
* GdkDragContext *context,
|
||
* gint x,
|
||
* gint y,
|
||
* guint time)
|
||
* {
|
||
* GdkModifierType mask;
|
||
*
|
||
* gdk_window_get_pointer (gtk_widget_get_window (widget),
|
||
* NULL, NULL, &mask);
|
||
* if (mask & GDK_CONTROL_MASK)
|
||
* gdk_drag_status (context, GDK_ACTION_COPY, time);
|
||
* else
|
||
* gdk_drag_status (context, GDK_ACTION_MOVE, time);
|
||
* }
|
||
* ]|
|
||
*/
|
||
void
|
||
gtk_drag_dest_set (GtkWidget *widget,
|
||
GtkDestDefaults flags,
|
||
const GtkTargetEntry *targets,
|
||
gint n_targets,
|
||
GdkDragAction actions)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_slice_new0 (GtkDragDestSite);
|
||
|
||
site->flags = flags;
|
||
site->have_drag = FALSE;
|
||
if (targets)
|
||
site->target_list = gtk_target_list_new (targets, n_targets);
|
||
else
|
||
site->target_list = NULL;
|
||
site->actions = actions;
|
||
site->do_proxy = FALSE;
|
||
site->proxy_window = NULL;
|
||
site->track_motion = FALSE;
|
||
|
||
gtk_drag_dest_set_internal (widget, site);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_set_proxy: (method)
|
||
* @widget: a #GtkWidget
|
||
* @proxy_window: the window to which to forward drag events
|
||
* @protocol: the drag protocol which the @proxy_window accepts
|
||
* (You can use gdk_drag_get_protocol() to determine this)
|
||
* @use_coordinates: If %TRUE, send the same coordinates to the
|
||
* destination, because it is an embedded
|
||
* subwindow.
|
||
*
|
||
* Sets this widget as a proxy for drops to another window.
|
||
*/
|
||
void
|
||
gtk_drag_dest_set_proxy (GtkWidget *widget,
|
||
GdkWindow *proxy_window,
|
||
GdkDragProtocol protocol,
|
||
gboolean use_coordinates)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (!proxy_window || GDK_IS_WINDOW (proxy_window));
|
||
|
||
site = g_slice_new (GtkDragDestSite);
|
||
|
||
site->flags = 0;
|
||
site->have_drag = FALSE;
|
||
site->target_list = NULL;
|
||
site->actions = 0;
|
||
site->proxy_window = proxy_window;
|
||
if (proxy_window)
|
||
g_object_ref (proxy_window);
|
||
site->do_proxy = TRUE;
|
||
site->proxy_protocol = protocol;
|
||
site->proxy_coords = use_coordinates;
|
||
site->track_motion = FALSE;
|
||
|
||
gtk_drag_dest_set_internal (widget, site);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_unset: (method)
|
||
* @widget: a #GtkWidget
|
||
*
|
||
* Clears information about a drop destination set with
|
||
* gtk_drag_dest_set(). The widget will no longer receive
|
||
* notification of drags.
|
||
*/
|
||
void
|
||
gtk_drag_dest_unset (GtkWidget *widget)
|
||
{
|
||
GtkDragDestSite *old_site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
old_site = g_object_get_data (G_OBJECT (widget),
|
||
"gtk-drag-dest");
|
||
if (old_site)
|
||
{
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_dest_realized,
|
||
old_site);
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_dest_hierarchy_changed,
|
||
old_site);
|
||
}
|
||
|
||
g_object_set_data (G_OBJECT (widget), I_("gtk-drag-dest"), NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_get_target_list: (method)
|
||
* @widget: a #GtkWidget
|
||
*
|
||
* Returns the list of targets this widget can accept from
|
||
* drag-and-drop.
|
||
*
|
||
* Returns: (transfer none): the #GtkTargetList, or %NULL if none
|
||
**/
|
||
GtkTargetList*
|
||
gtk_drag_dest_get_target_list (GtkWidget *widget)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
|
||
return site ? site->target_list : NULL;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_set_target_list: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
* @target_list: (allow-none): list of droppable targets, or %NULL for none
|
||
*
|
||
* Sets the target types that this widget can accept from drag-and-drop.
|
||
* The widget must first be made into a drag destination with
|
||
* gtk_drag_dest_set().
|
||
**/
|
||
void
|
||
gtk_drag_dest_set_target_list (GtkWidget *widget,
|
||
GtkTargetList *target_list)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
|
||
if (!site)
|
||
{
|
||
g_warning ("Can't set a target list on a widget until you've called gtk_drag_dest_set() "
|
||
"to make the widget into a drag destination");
|
||
return;
|
||
}
|
||
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
|
||
if (site->target_list)
|
||
gtk_target_list_unref (site->target_list);
|
||
|
||
site->target_list = target_list;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_add_text_targets: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
*
|
||
* Add the text targets supported by #GtkSelectionData to
|
||
* the target list of the drag destination. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_text_targets() and
|
||
* gtk_drag_dest_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_dest_add_text_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_dest_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_text_targets (target_list, 0);
|
||
gtk_drag_dest_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_add_image_targets: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
*
|
||
* Add the image targets supported by #GtkSelectionData to
|
||
* the target list of the drag destination. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_image_targets() and
|
||
* gtk_drag_dest_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_dest_add_image_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_dest_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_image_targets (target_list, 0, FALSE);
|
||
gtk_drag_dest_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_add_uri_targets: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
*
|
||
* Add the URI targets supported by #GtkSelectionData to
|
||
* the target list of the drag destination. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_uri_targets() and
|
||
* gtk_drag_dest_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_dest_add_uri_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_dest_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_uri_targets (target_list, 0);
|
||
gtk_drag_dest_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_set_track_motion: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
* @track_motion: whether to accept all targets
|
||
*
|
||
* Tells the widget to emit #GtkWidget::drag-motion and
|
||
* #GtkWidget::drag-leave events regardless of the targets and the
|
||
* %GTK_DEST_DEFAULT_MOTION flag.
|
||
*
|
||
* This may be used when a widget wants to do generic
|
||
* actions regardless of the targets that the source offers.
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
void
|
||
gtk_drag_dest_set_track_motion (GtkWidget *widget,
|
||
gboolean track_motion)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
|
||
g_return_if_fail (site != NULL);
|
||
|
||
site->track_motion = track_motion != FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_get_track_motion: (method)
|
||
* @widget: a #GtkWidget that’s a drag destination
|
||
*
|
||
* Returns whether the widget has been configured to always
|
||
* emit #GtkWidget::drag-motion signals.
|
||
*
|
||
* Returns: %TRUE if the widget always emits
|
||
* #GtkWidget::drag-motion events
|
||
*
|
||
* Since: 2.10
|
||
**/
|
||
gboolean
|
||
gtk_drag_dest_get_track_motion (GtkWidget *widget)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
|
||
if (site)
|
||
return site->track_motion;
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* _gtk_drag_dest_handle_event:
|
||
* Called from widget event handling code on Drag events
|
||
* for destinations.
|
||
*
|
||
* arguments:
|
||
* toplevel: Toplevel widget that received the event
|
||
* event:
|
||
* results:
|
||
*************************************************************/
|
||
|
||
void
|
||
_gtk_drag_dest_handle_event (GtkWidget *toplevel,
|
||
GdkEvent *event)
|
||
{
|
||
GtkDragDestInfo *info;
|
||
GdkDragContext *context;
|
||
|
||
g_return_if_fail (toplevel != NULL);
|
||
g_return_if_fail (event != NULL);
|
||
|
||
context = event->dnd.context;
|
||
|
||
info = gtk_drag_get_dest_info (context, TRUE);
|
||
|
||
/* Find the widget for the event */
|
||
switch (event->type)
|
||
{
|
||
case GDK_DRAG_ENTER:
|
||
break;
|
||
|
||
case GDK_DRAG_LEAVE:
|
||
if (info->widget)
|
||
{
|
||
gtk_drag_dest_leave (info->widget, context, event->dnd.time);
|
||
info->widget = NULL;
|
||
}
|
||
break;
|
||
|
||
case GDK_DRAG_MOTION:
|
||
case GDK_DROP_START:
|
||
{
|
||
GdkWindow *window;
|
||
gint tx, ty;
|
||
gboolean found;
|
||
|
||
if (event->type == GDK_DROP_START)
|
||
{
|
||
info->dropped = TRUE;
|
||
/* We send a leave here so that the widget unhighlights
|
||
* properly.
|
||
*/
|
||
if (info->widget)
|
||
{
|
||
gtk_drag_dest_leave (info->widget, context, event->dnd.time);
|
||
info->widget = NULL;
|
||
}
|
||
}
|
||
|
||
window = gtk_widget_get_window (toplevel);
|
||
|
||
#ifdef GDK_WINDOWING_X11
|
||
/* Hackaround for: http://bugzilla.gnome.org/show_bug.cgi?id=136112
|
||
*
|
||
* Currently gdk_window_get_position doesn't provide reliable
|
||
* information for embedded windows, so we call the much more
|
||
* expensive gdk_window_get_origin().
|
||
*/
|
||
if (GTK_IS_PLUG (toplevel))
|
||
gdk_window_get_origin (window, &tx, &ty);
|
||
else
|
||
#endif /* GDK_WINDOWING_X11 */
|
||
gdk_window_get_position (window, &tx, &ty);
|
||
|
||
found = gtk_drag_find_widget (toplevel,
|
||
context,
|
||
info,
|
||
event->dnd.x_root - tx,
|
||
event->dnd.y_root - ty,
|
||
event->dnd.time,
|
||
(event->type == GDK_DRAG_MOTION) ?
|
||
gtk_drag_dest_motion :
|
||
gtk_drag_dest_drop);
|
||
|
||
if (info->widget && !found)
|
||
{
|
||
gtk_drag_dest_leave (info->widget, context, event->dnd.time);
|
||
info->widget = NULL;
|
||
}
|
||
|
||
/* Send a reply.
|
||
*/
|
||
if (event->type == GDK_DRAG_MOTION)
|
||
{
|
||
if (!found)
|
||
gdk_drag_status (context, 0, event->dnd.time);
|
||
}
|
||
else if (event->type == GDK_DROP_START && !info->proxy_source)
|
||
{
|
||
gdk_drop_reply (context, found, event->dnd.time);
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
g_assert_not_reached ();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_dest_find_target: (method)
|
||
* @widget: drag destination widget
|
||
* @context: drag context
|
||
* @target_list: (allow-none): list of droppable targets, or %NULL to use
|
||
* gtk_drag_dest_get_target_list (@widget).
|
||
*
|
||
* Looks for a match between the supported targets of @context and the
|
||
* @dest_target_list, returning the first matching target, otherwise
|
||
* returning %GDK_NONE. @dest_target_list should usually be the return
|
||
* value from gtk_drag_dest_get_target_list(), but some widgets may
|
||
* have different valid targets for different parts of the widget; in
|
||
* that case, they will have to implement a drag_motion handler that
|
||
* passes the correct target list to this function.
|
||
*
|
||
* Returns: (transfer none): first target that the source offers
|
||
* and the dest can accept, or %GDK_NONE
|
||
**/
|
||
GdkAtom
|
||
gtk_drag_dest_find_target (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
GtkTargetList *target_list)
|
||
{
|
||
GList *tmp_target;
|
||
GList *tmp_source = NULL;
|
||
GtkWidget *source_widget;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), GDK_NONE);
|
||
g_return_val_if_fail (GDK_IS_DRAG_CONTEXT (context), GDK_NONE);
|
||
|
||
|
||
source_widget = gtk_drag_get_source_widget (context);
|
||
|
||
if (target_list == NULL)
|
||
target_list = gtk_drag_dest_get_target_list (widget);
|
||
|
||
if (target_list == NULL)
|
||
return GDK_NONE;
|
||
|
||
tmp_target = target_list->list;
|
||
while (tmp_target)
|
||
{
|
||
GtkTargetPair *pair = tmp_target->data;
|
||
tmp_source = gdk_drag_context_list_targets (context);
|
||
while (tmp_source)
|
||
{
|
||
if (tmp_source->data == GUINT_TO_POINTER (pair->target))
|
||
{
|
||
if ((!(pair->flags & GTK_TARGET_SAME_APP) || source_widget) &&
|
||
(!(pair->flags & GTK_TARGET_SAME_WIDGET) || (source_widget == widget)) &&
|
||
(!(pair->flags & GTK_TARGET_OTHER_APP) || !source_widget) &&
|
||
(!(pair->flags & GTK_TARGET_OTHER_WIDGET) || (source_widget != widget)))
|
||
return pair->target;
|
||
else
|
||
break;
|
||
}
|
||
tmp_source = tmp_source->next;
|
||
}
|
||
tmp_target = tmp_target->next;
|
||
}
|
||
|
||
return GDK_NONE;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_selection_received (GtkWidget *widget,
|
||
GtkSelectionData *selection_data,
|
||
guint time,
|
||
gpointer data)
|
||
{
|
||
GdkDragContext *context;
|
||
GtkDragDestInfo *info;
|
||
GtkWidget *drop_widget;
|
||
GdkAtom target;
|
||
|
||
drop_widget = data;
|
||
|
||
context = g_object_get_data (G_OBJECT (widget), "drag-context");
|
||
info = gtk_drag_get_dest_info (context, FALSE);
|
||
|
||
if (info->proxy_data &&
|
||
gtk_selection_data_get_target (info->proxy_data) == gtk_selection_data_get_target (selection_data))
|
||
{
|
||
gtk_selection_data_set (info->proxy_data,
|
||
gtk_selection_data_get_data_type (selection_data),
|
||
gtk_selection_data_get_format (selection_data),
|
||
gtk_selection_data_get_data (selection_data),
|
||
gtk_selection_data_get_length (selection_data));
|
||
gtk_main_quit ();
|
||
return;
|
||
}
|
||
|
||
target = gtk_selection_data_get_target (selection_data);
|
||
if (target == gdk_atom_intern_static_string ("DELETE"))
|
||
{
|
||
gtk_drag_finish (context, TRUE, FALSE, time);
|
||
}
|
||
else if ((target == gdk_atom_intern_static_string ("XmTRANSFER_SUCCESS")) ||
|
||
(target == gdk_atom_intern_static_string ("XmTRANSFER_FAILURE")))
|
||
{
|
||
/* Do nothing */
|
||
}
|
||
else
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
site = g_object_get_data (G_OBJECT (drop_widget), "gtk-drag-dest");
|
||
|
||
if (site && site->target_list)
|
||
{
|
||
guint target_info;
|
||
|
||
if (gtk_target_list_find (site->target_list,
|
||
target,
|
||
&target_info))
|
||
{
|
||
if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
|
||
gtk_selection_data_get_length (selection_data) >= 0)
|
||
g_signal_emit_by_name (drop_widget,
|
||
"drag-data-received",
|
||
context, info->drop_x, info->drop_y,
|
||
selection_data,
|
||
target_info, time);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
g_signal_emit_by_name (drop_widget,
|
||
"drag-data-received",
|
||
context, info->drop_x, info->drop_y,
|
||
selection_data,
|
||
0, time);
|
||
}
|
||
|
||
if (site && site->flags & GTK_DEST_DEFAULT_DROP)
|
||
{
|
||
|
||
gtk_drag_finish (context,
|
||
(gtk_selection_data_get_length (selection_data) >= 0),
|
||
(gdk_drag_context_get_selected_action (context) == GDK_ACTION_MOVE),
|
||
time);
|
||
}
|
||
|
||
g_object_unref (drop_widget);
|
||
}
|
||
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_selection_received,
|
||
data);
|
||
|
||
g_object_set_data (G_OBJECT (widget), I_("drag-context"), NULL);
|
||
g_object_unref (context);
|
||
|
||
gtk_drag_release_ipc_widget (widget);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_find_widget:
|
||
* Function used to locate widgets for
|
||
* DRAG_MOTION and DROP_START events.
|
||
*************************************************************/
|
||
|
||
static gboolean
|
||
gtk_drag_find_widget (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
GtkDragDestInfo *info,
|
||
gint x,
|
||
gint y,
|
||
guint32 time,
|
||
GtkDragDestCallback callback)
|
||
{
|
||
if (!gtk_widget_get_mapped (widget) ||
|
||
!gtk_widget_get_sensitive (widget))
|
||
return FALSE;
|
||
|
||
/* Get the widget at the pointer coordinates and travel up
|
||
* the widget hierarchy from there.
|
||
*/
|
||
widget = _gtk_widget_find_at_coords (gtk_widget_get_window (widget),
|
||
x, y, &x, &y);
|
||
if (!widget)
|
||
return FALSE;
|
||
|
||
while (widget)
|
||
{
|
||
GtkWidget *parent;
|
||
GList *hierarchy = NULL;
|
||
gboolean found = FALSE;
|
||
|
||
if (!gtk_widget_get_mapped (widget) ||
|
||
!gtk_widget_get_sensitive (widget))
|
||
return FALSE;
|
||
|
||
/* need to reference the entire hierarchy temporarily in case the
|
||
* ::drag-motion/::drag-drop callbacks change the widget hierarchy.
|
||
*/
|
||
for (parent = widget;
|
||
parent;
|
||
parent = gtk_widget_get_parent (parent))
|
||
{
|
||
hierarchy = g_list_prepend (hierarchy, g_object_ref (parent));
|
||
}
|
||
|
||
/* If the current widget is registered as a drop site, check to
|
||
* emit "drag-motion" to check if we are actually in a drop
|
||
* site.
|
||
*/
|
||
if (g_object_get_data (G_OBJECT (widget), "gtk-drag-dest"))
|
||
{
|
||
found = callback (widget, context, x, y, time);
|
||
|
||
/* If so, send a "drag-leave" to the last widget */
|
||
if (found)
|
||
{
|
||
if (info->widget && info->widget != widget)
|
||
{
|
||
gtk_drag_dest_leave (info->widget, context, time);
|
||
}
|
||
|
||
info->widget = widget;
|
||
}
|
||
}
|
||
|
||
if (!found)
|
||
{
|
||
/* Get the parent before unreffing the hierarchy because
|
||
* invoking the callback might have destroyed the widget
|
||
*/
|
||
parent = gtk_widget_get_parent (widget);
|
||
|
||
/* The parent might be going away when unreffing the
|
||
* hierarchy, so also protect againt that
|
||
*/
|
||
if (parent)
|
||
g_object_add_weak_pointer (G_OBJECT (parent), (gpointer *) &parent);
|
||
}
|
||
|
||
g_list_free_full (hierarchy, g_object_unref);
|
||
|
||
if (found)
|
||
return TRUE;
|
||
|
||
if (parent)
|
||
g_object_remove_weak_pointer (G_OBJECT (parent), (gpointer *) &parent);
|
||
else
|
||
return FALSE;
|
||
|
||
if (!gtk_widget_translate_coordinates (widget, parent, x, y, &x, &y))
|
||
return FALSE;
|
||
|
||
widget = parent;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_proxy_begin (GtkWidget *widget,
|
||
GtkDragDestInfo *dest_info,
|
||
guint32 time)
|
||
{
|
||
GtkDragSourceInfo *source_info;
|
||
GList *tmp_list;
|
||
GdkDragContext *context;
|
||
GtkWidget *ipc_widget;
|
||
|
||
if (dest_info->proxy_source)
|
||
{
|
||
gdk_drag_abort (dest_info->proxy_source->context, time);
|
||
gtk_drag_source_info_destroy (dest_info->proxy_source);
|
||
dest_info->proxy_source = NULL;
|
||
}
|
||
|
||
ipc_widget = gtk_drag_get_ipc_widget (widget);
|
||
context = gdk_drag_begin (gtk_widget_get_window (ipc_widget),
|
||
gdk_drag_context_list_targets (dest_info->context));
|
||
|
||
source_info = gtk_drag_get_source_info (context, TRUE);
|
||
|
||
source_info->ipc_widget = ipc_widget;
|
||
source_info->widget = g_object_ref (widget);
|
||
|
||
source_info->target_list = gtk_target_list_new (NULL, 0);
|
||
tmp_list = gdk_drag_context_list_targets (dest_info->context);
|
||
while (tmp_list)
|
||
{
|
||
gtk_target_list_add (source_info->target_list,
|
||
GDK_POINTER_TO_ATOM (tmp_list->data), 0, 0);
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
source_info->proxy_dest = dest_info;
|
||
|
||
g_signal_connect (ipc_widget,
|
||
"selection-get",
|
||
G_CALLBACK (gtk_drag_selection_get),
|
||
source_info);
|
||
|
||
dest_info->proxy_source = source_info;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_dest_info_destroy (gpointer data)
|
||
{
|
||
g_slice_free (GtkDragDestInfo, data);
|
||
}
|
||
|
||
static GtkDragDestInfo *
|
||
gtk_drag_get_dest_info (GdkDragContext *context,
|
||
gboolean create)
|
||
{
|
||
GtkDragDestInfo *info;
|
||
static GQuark info_quark = 0;
|
||
if (!info_quark)
|
||
info_quark = g_quark_from_static_string ("gtk-dest-info");
|
||
|
||
info = g_object_get_qdata (G_OBJECT (context), info_quark);
|
||
if (!info && create)
|
||
{
|
||
info = g_slice_new0 (GtkDragDestInfo);
|
||
info->context = context;
|
||
g_object_set_qdata_full (G_OBJECT (context), info_quark,
|
||
info, gtk_drag_dest_info_destroy);
|
||
}
|
||
|
||
return info;
|
||
}
|
||
|
||
static GQuark dest_info_quark = 0;
|
||
|
||
static GtkDragSourceInfo *
|
||
gtk_drag_get_source_info (GdkDragContext *context,
|
||
gboolean create)
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
if (!dest_info_quark)
|
||
dest_info_quark = g_quark_from_static_string ("gtk-source-info");
|
||
|
||
info = g_object_get_qdata (G_OBJECT (context), dest_info_quark);
|
||
if (!info && create)
|
||
{
|
||
info = g_new0 (GtkDragSourceInfo, 1);
|
||
info->context = context;
|
||
g_object_set_qdata (G_OBJECT (context), dest_info_quark, info);
|
||
}
|
||
|
||
return info;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_clear_source_info (GdkDragContext *context)
|
||
{
|
||
g_object_set_qdata (G_OBJECT (context), dest_info_quark, NULL);
|
||
}
|
||
|
||
static void
|
||
gtk_drag_dest_realized (GtkWidget *widget)
|
||
{
|
||
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
|
||
|
||
if (gtk_widget_is_toplevel (toplevel))
|
||
gdk_window_register_dnd (gtk_widget_get_window (toplevel));
|
||
}
|
||
|
||
static void
|
||
gtk_drag_dest_hierarchy_changed (GtkWidget *widget,
|
||
GtkWidget *previous_toplevel)
|
||
{
|
||
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
|
||
|
||
if (gtk_widget_is_toplevel (toplevel) && gtk_widget_get_realized (toplevel))
|
||
gdk_window_register_dnd (gtk_widget_get_window (toplevel));
|
||
}
|
||
|
||
static void
|
||
gtk_drag_dest_site_destroy (gpointer data)
|
||
{
|
||
GtkDragDestSite *site = data;
|
||
|
||
if (site->proxy_window)
|
||
g_object_unref (site->proxy_window);
|
||
|
||
if (site->target_list)
|
||
gtk_target_list_unref (site->target_list);
|
||
|
||
g_slice_free (GtkDragDestSite, site);
|
||
}
|
||
|
||
/*
|
||
* Default drag handlers
|
||
*/
|
||
static void
|
||
gtk_drag_dest_leave (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
guint time)
|
||
{
|
||
GtkDragDestSite *site;
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
g_return_if_fail (site != NULL);
|
||
|
||
if (site->do_proxy)
|
||
{
|
||
GtkDragDestInfo *info = gtk_drag_get_dest_info (context, FALSE);
|
||
|
||
if (info->proxy_source && info->proxy_source->widget == widget && !info->dropped)
|
||
{
|
||
gdk_drag_abort (info->proxy_source->context, time);
|
||
gtk_drag_source_info_destroy (info->proxy_source);
|
||
info->proxy_source = NULL;
|
||
}
|
||
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
if ((site->flags & GTK_DEST_DEFAULT_HIGHLIGHT) && site->have_drag)
|
||
gtk_drag_unhighlight (widget);
|
||
|
||
if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag ||
|
||
site->track_motion)
|
||
g_signal_emit_by_name (widget, "drag-leave", context, time);
|
||
|
||
site->have_drag = FALSE;
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_dest_motion (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
gint x,
|
||
gint y,
|
||
guint time)
|
||
{
|
||
GtkDragDestSite *site;
|
||
GdkDragAction action = 0;
|
||
gboolean retval;
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
g_return_val_if_fail (site != NULL, FALSE);
|
||
|
||
if (site->do_proxy)
|
||
{
|
||
GdkAtom selection;
|
||
GdkEvent *current_event;
|
||
GdkWindow *dest_window;
|
||
GdkDragProtocol proto;
|
||
|
||
GtkDragDestInfo *info = gtk_drag_get_dest_info (context, FALSE);
|
||
|
||
if (!info->proxy_source || info->proxy_source->widget != widget)
|
||
gtk_drag_proxy_begin (widget, info, time);
|
||
|
||
current_event = gtk_get_current_event ();
|
||
|
||
if (site->proxy_window)
|
||
{
|
||
dest_window = site->proxy_window;
|
||
proto = site->proxy_protocol;
|
||
}
|
||
else
|
||
{
|
||
gdk_drag_find_window_for_screen (info->proxy_source->context,
|
||
NULL,
|
||
gdk_window_get_screen (current_event->dnd.window),
|
||
current_event->dnd.x_root,
|
||
current_event->dnd.y_root,
|
||
&dest_window, &proto);
|
||
}
|
||
|
||
gdk_drag_motion (info->proxy_source->context,
|
||
dest_window, proto,
|
||
current_event->dnd.x_root,
|
||
current_event->dnd.y_root,
|
||
gdk_drag_context_get_suggested_action (context),
|
||
gdk_drag_context_get_actions (context),
|
||
time);
|
||
|
||
if (!site->proxy_window && dest_window)
|
||
g_object_unref (dest_window);
|
||
|
||
selection = gdk_drag_get_selection (info->proxy_source->context);
|
||
if (selection &&
|
||
selection != gdk_drag_get_selection (info->context))
|
||
gtk_drag_source_check_selection (info->proxy_source, selection, time);
|
||
|
||
gdk_event_free (current_event);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
if (site->track_motion || site->flags & GTK_DEST_DEFAULT_MOTION)
|
||
{
|
||
if (gdk_drag_context_get_suggested_action (context) & site->actions)
|
||
action = gdk_drag_context_get_suggested_action (context);
|
||
else
|
||
{
|
||
gint i;
|
||
|
||
for (i = 0; i < 8; i++)
|
||
{
|
||
if ((site->actions & (1 << i)) &&
|
||
(gdk_drag_context_get_actions (context) & (1 << i)))
|
||
{
|
||
action = (1 << i);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (action && gtk_drag_dest_find_target (widget, context, NULL))
|
||
{
|
||
if (!site->have_drag)
|
||
{
|
||
site->have_drag = TRUE;
|
||
if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
|
||
gtk_drag_highlight (widget);
|
||
}
|
||
|
||
gdk_drag_status (context, action, time);
|
||
}
|
||
else
|
||
{
|
||
gdk_drag_status (context, 0, time);
|
||
if (!site->track_motion)
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
g_signal_emit_by_name (widget, "drag-motion",
|
||
context, x, y, time, &retval);
|
||
|
||
return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_dest_drop (GtkWidget *widget,
|
||
GdkDragContext *context,
|
||
gint x,
|
||
gint y,
|
||
guint time)
|
||
{
|
||
GtkDragDestSite *site;
|
||
GtkDragDestInfo *info;
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-drag-dest");
|
||
g_return_val_if_fail (site != NULL, FALSE);
|
||
|
||
info = gtk_drag_get_dest_info (context, FALSE);
|
||
g_return_val_if_fail (info != NULL, FALSE);
|
||
|
||
info->drop_x = x;
|
||
info->drop_y = y;
|
||
|
||
if (site->do_proxy)
|
||
{
|
||
if (info->proxy_source ||
|
||
(gdk_drag_context_get_protocol (info->context) == GDK_DRAG_PROTO_ROOTWIN))
|
||
{
|
||
gtk_drag_drop (info->proxy_source, time);
|
||
}
|
||
else
|
||
{
|
||
/* We need to synthesize a motion event, wait for a status,
|
||
* and, if we get a good one, do a drop.
|
||
*/
|
||
|
||
GdkEvent *current_event;
|
||
GdkAtom selection;
|
||
GdkWindow *dest_window;
|
||
GdkDragProtocol proto;
|
||
|
||
gtk_drag_proxy_begin (widget, info, time);
|
||
info->proxy_drop_wait = TRUE;
|
||
info->proxy_drop_time = time;
|
||
|
||
current_event = gtk_get_current_event ();
|
||
|
||
if (site->proxy_window)
|
||
{
|
||
dest_window = site->proxy_window;
|
||
proto = site->proxy_protocol;
|
||
}
|
||
else
|
||
{
|
||
gdk_drag_find_window_for_screen (info->proxy_source->context,
|
||
NULL,
|
||
gdk_window_get_screen (current_event->dnd.window),
|
||
current_event->dnd.x_root,
|
||
current_event->dnd.y_root,
|
||
&dest_window, &proto);
|
||
}
|
||
|
||
gdk_drag_motion (info->proxy_source->context,
|
||
dest_window, proto,
|
||
current_event->dnd.x_root,
|
||
current_event->dnd.y_root,
|
||
gdk_drag_context_get_suggested_action (context),
|
||
gdk_drag_context_get_actions (context),
|
||
time);
|
||
|
||
if (!site->proxy_window && dest_window)
|
||
g_object_unref (dest_window);
|
||
|
||
selection = gdk_drag_get_selection (info->proxy_source->context);
|
||
if (selection &&
|
||
selection != gdk_drag_get_selection (info->context))
|
||
gtk_drag_source_check_selection (info->proxy_source, selection, time);
|
||
|
||
gdk_event_free (current_event);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
{
|
||
gboolean retval;
|
||
|
||
if (site->flags & GTK_DEST_DEFAULT_DROP)
|
||
{
|
||
GdkAtom target = gtk_drag_dest_find_target (widget, context, NULL);
|
||
|
||
if (target == GDK_NONE)
|
||
{
|
||
gtk_drag_finish (context, FALSE, FALSE, time);
|
||
return TRUE;
|
||
}
|
||
else
|
||
gtk_drag_get_data (widget, context, target, time);
|
||
}
|
||
|
||
g_signal_emit_by_name (widget, "drag-drop",
|
||
context, x, y, time, &retval);
|
||
|
||
return (site->flags & GTK_DEST_DEFAULT_DROP) ? TRUE : retval;
|
||
}
|
||
}
|
||
|
||
/***************
|
||
* Source side *
|
||
***************/
|
||
|
||
static GtkIconHelper *
|
||
gtk_drag_source_site_get_icon_helper (GtkDragSourceSite *site)
|
||
{
|
||
GtkIconHelper *helper;
|
||
|
||
if (site)
|
||
helper = g_object_ref (site->icon_helper);
|
||
else
|
||
helper = _gtk_icon_helper_new ();
|
||
|
||
if (_gtk_icon_helper_get_is_empty (helper))
|
||
_gtk_icon_helper_set_icon_name (helper, "text-x-generic", GTK_ICON_SIZE_DND);
|
||
|
||
return helper;
|
||
}
|
||
|
||
/* Like GtkDragBegin, but also takes a GtkDragSourceSite,
|
||
* so that we can set the icon from the source site information
|
||
*/
|
||
static GdkDragContext *
|
||
gtk_drag_begin_internal (GtkWidget *widget,
|
||
GtkDragSourceSite *site,
|
||
GtkTargetList *target_list,
|
||
GdkDragAction actions,
|
||
gint button,
|
||
GdkEvent *event,
|
||
int x,
|
||
int y)
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
GList *targets = NULL;
|
||
GList *tmp_list;
|
||
guint32 time = GDK_CURRENT_TIME;
|
||
GdkDragAction possible_actions, suggested_action;
|
||
GdkDragContext *context;
|
||
GtkWidget *ipc_widget;
|
||
GdkCursor *cursor;
|
||
GdkDevice *pointer, *keyboard;
|
||
GdkWindow *ipc_window;
|
||
|
||
pointer = keyboard = NULL;
|
||
ipc_widget = gtk_drag_get_ipc_widget (widget);
|
||
|
||
gtk_drag_get_event_actions (event, button, actions,
|
||
&suggested_action, &possible_actions);
|
||
|
||
cursor = gtk_drag_get_cursor (widget,
|
||
gtk_widget_get_display (widget),
|
||
suggested_action,
|
||
NULL);
|
||
|
||
if (event)
|
||
{
|
||
time = gdk_event_get_time (event);
|
||
if (time == GDK_CURRENT_TIME)
|
||
time = gtk_get_current_event_time ();
|
||
|
||
pointer = gdk_event_get_device (event);
|
||
|
||
if (gdk_device_get_source (pointer) == GDK_SOURCE_KEYBOARD)
|
||
{
|
||
keyboard = pointer;
|
||
pointer = gdk_device_get_associated_device (keyboard);
|
||
}
|
||
else
|
||
keyboard = gdk_device_get_associated_device (pointer);
|
||
}
|
||
else
|
||
{
|
||
GdkDeviceManager *device_manager;
|
||
|
||
device_manager = gdk_display_get_device_manager (gtk_widget_get_display (widget));
|
||
pointer = gdk_device_manager_get_client_pointer (device_manager);
|
||
keyboard = gdk_device_get_associated_device (pointer);
|
||
}
|
||
|
||
if (!pointer)
|
||
return NULL;
|
||
|
||
ipc_window = gtk_widget_get_window (ipc_widget);
|
||
|
||
if (gdk_device_grab (pointer, ipc_window,
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_POINTER_MOTION_MASK |
|
||
GDK_BUTTON_RELEASE_MASK,
|
||
cursor, time) != GDK_GRAB_SUCCESS)
|
||
{
|
||
gtk_drag_release_ipc_widget (ipc_widget);
|
||
return NULL;
|
||
}
|
||
|
||
if (keyboard)
|
||
grab_dnd_keys (ipc_widget, keyboard, time);
|
||
|
||
/* We use a GTK grab here to override any grabs that the widget
|
||
* we are dragging from might have held
|
||
*/
|
||
gtk_device_grab_add (ipc_widget, pointer, FALSE);
|
||
|
||
tmp_list = g_list_last (target_list->list);
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
targets = g_list_prepend (targets,
|
||
GINT_TO_POINTER (pair->target));
|
||
tmp_list = tmp_list->prev;
|
||
}
|
||
|
||
source_widgets = g_slist_prepend (source_widgets, ipc_widget);
|
||
|
||
context = gdk_drag_begin (ipc_window, targets);
|
||
gdk_drag_context_set_device (context, pointer);
|
||
g_list_free (targets);
|
||
|
||
info = gtk_drag_get_source_info (context, TRUE);
|
||
|
||
info->ipc_widget = ipc_widget;
|
||
g_object_set_data (G_OBJECT (info->ipc_widget), I_("gtk-info"), info);
|
||
|
||
info->widget = g_object_ref (widget);
|
||
|
||
info->button = button;
|
||
info->cursor = cursor;
|
||
info->target_list = target_list;
|
||
gtk_target_list_ref (target_list);
|
||
|
||
info->possible_actions = actions;
|
||
|
||
info->status = GTK_DRAG_STATUS_DRAG;
|
||
info->last_event = NULL;
|
||
info->selections = NULL;
|
||
info->icon_window = NULL;
|
||
info->destroy_icon = FALSE;
|
||
|
||
/* Set cur_x, cur_y here so if the "drag-begin" signal shows
|
||
* the drag icon, it will be in the right place
|
||
*/
|
||
if (event)
|
||
info->cur_screen = gdk_event_get_screen (event);
|
||
else
|
||
gdk_device_get_position (pointer, &info->cur_screen, NULL, NULL);
|
||
|
||
if (x != -1 && y != -1)
|
||
{
|
||
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
|
||
gtk_widget_translate_coordinates (widget, toplevel,
|
||
x, y, &x, &y);
|
||
gdk_window_get_root_coords (gtk_widget_get_window (toplevel),
|
||
x, y, &info->start_x, &info->start_y);
|
||
}
|
||
else if (event && event->type == GDK_MOTION_NOTIFY)
|
||
{
|
||
info->start_x = event->motion.x_root;
|
||
info->start_y = event->motion.y_root;
|
||
}
|
||
else
|
||
gdk_device_get_position (pointer, NULL, &info->start_x, &info->start_y);
|
||
|
||
|
||
g_signal_emit_by_name (widget, "drag-begin", info->context);
|
||
|
||
/* Ensure that we have an icon before we start the drag; the
|
||
* application may have set one in ::drag_begin, or it may
|
||
* not have set one.
|
||
*/
|
||
if (!info->icon_window && !info->icon_helper)
|
||
info->icon_helper = gtk_drag_source_site_get_icon_helper (site);
|
||
|
||
/* We need to composite the icon into the cursor, if we are
|
||
* not using an icon window.
|
||
*/
|
||
if (info->icon_helper)
|
||
{
|
||
cursor = gtk_drag_get_cursor (widget,
|
||
gtk_widget_get_display (widget),
|
||
suggested_action,
|
||
info);
|
||
|
||
if (cursor != info->cursor)
|
||
{
|
||
gdk_device_grab (pointer, gtk_widget_get_window (widget),
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_POINTER_MOTION_MASK |
|
||
GDK_BUTTON_RELEASE_MASK,
|
||
cursor, time);
|
||
info->cursor = cursor;
|
||
}
|
||
}
|
||
|
||
info->cur_x = info->start_x;
|
||
info->cur_y = info->start_y;
|
||
|
||
if (event && event->type == GDK_MOTION_NOTIFY)
|
||
gtk_drag_motion_cb (info->ipc_widget, (GdkEventMotion *)event, info);
|
||
else
|
||
gtk_drag_update (info, info->cur_screen, info->cur_x, info->cur_y, event);
|
||
|
||
g_signal_connect (info->ipc_widget, "grab-broken-event",
|
||
G_CALLBACK (gtk_drag_grab_broken_event_cb), info);
|
||
g_signal_connect (info->ipc_widget, "grab-notify",
|
||
G_CALLBACK (gtk_drag_grab_notify_cb), info);
|
||
g_signal_connect (info->ipc_widget, "button-release-event",
|
||
G_CALLBACK (gtk_drag_button_release_cb), info);
|
||
g_signal_connect (info->ipc_widget, "motion-notify-event",
|
||
G_CALLBACK (gtk_drag_motion_cb), info);
|
||
g_signal_connect (info->ipc_widget, "key-press-event",
|
||
G_CALLBACK (gtk_drag_key_cb), info);
|
||
g_signal_connect (info->ipc_widget, "key-release-event",
|
||
G_CALLBACK (gtk_drag_key_cb), info);
|
||
g_signal_connect (info->ipc_widget, "selection-get",
|
||
G_CALLBACK (gtk_drag_selection_get), info);
|
||
|
||
info->have_grab = TRUE;
|
||
info->grab_time = time;
|
||
|
||
return info->context;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_begin_with_coordinates: (method)
|
||
* @widget: the source widget.
|
||
* @targets: The targets (data formats) in which the
|
||
* source can provide the data.
|
||
* @actions: A bitmask of the allowed drag actions for this drag.
|
||
* @button: The button the user clicked to start the drag.
|
||
* @event: The event that triggered the start of the drag.
|
||
* @x: The initial x coordinate to start dragging from, in the coordinate space
|
||
* of @widget. If -1 is passed, the coordinates are retrieved from @event or
|
||
* the current pointer position.
|
||
* @y: The initial y coordinate to start dragging from, in the coordinate space
|
||
* of @widget. If -1 is passed, the coordinates are retrieved from @event or
|
||
* the current pointer position.
|
||
*
|
||
* Initiates a drag on the source side. The function only needs to be used
|
||
* when the application is starting drags itself, and is not needed when
|
||
* gtk_drag_source_set() is used.
|
||
*
|
||
* The @event is used to retrieve the timestamp that will be used internally to
|
||
* grab the pointer. If @event is %NULL, then %GDK_CURRENT_TIME will be used.
|
||
* However, you should try to pass a real event in all cases, since that can be
|
||
* used to get information about the drag.
|
||
*
|
||
* Generally there are three cases when you want to start a drag by hand by
|
||
* calling this function:
|
||
*
|
||
* 1. During a #GtkWidget::button-press-event handler, if you want to start a drag
|
||
* immediately when the user presses the mouse button. Pass the @event
|
||
* that you have in your #GtkWidget::button-press-event handler.
|
||
*
|
||
* 2. During a #GtkWidget::motion-notify-event handler, if you want to start a drag
|
||
* when the mouse moves past a certain threshold distance after a button-press.
|
||
* Pass the @event that you have in your #GtkWidget::motion-notify-event handler.
|
||
*
|
||
* 3. During a timeout handler, if you want to start a drag after the mouse
|
||
* button is held down for some time. Try to save the last event that you got
|
||
* from the mouse, using gdk_event_copy(), and pass it to this function
|
||
* (remember to free the event with gdk_event_free() when you are done).
|
||
* If you can really not pass a real event, pass #NULL instead.
|
||
*
|
||
* Returns: (transfer none): the context for this drag.
|
||
*
|
||
* Since: 3.10
|
||
**/
|
||
GdkDragContext *
|
||
gtk_drag_begin_with_coordinates (GtkWidget *widget,
|
||
GtkTargetList *targets,
|
||
GdkDragAction actions,
|
||
gint button,
|
||
GdkEvent *event,
|
||
gint x,
|
||
gint y)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
|
||
g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
|
||
g_return_val_if_fail (targets != NULL, NULL);
|
||
|
||
return gtk_drag_begin_internal (widget, NULL, targets,
|
||
actions, button, event, x, y);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_begin: (method)
|
||
* @widget: the source widget.
|
||
* @targets: The targets (data formats) in which the
|
||
* source can provide the data.
|
||
* @actions: A bitmask of the allowed drag actions for this drag.
|
||
* @button: The button the user clicked to start the drag.
|
||
* @event: The event that triggered the start of the drag.
|
||
*
|
||
* This is equivalent to gtk_drag_begin_with_coordinates(), passing -1, -1
|
||
* as coordinates.
|
||
*
|
||
* Returns: (transfer none): the context for this drag.
|
||
*
|
||
* Deprecated: 3.10: Use gtk_drag_begin_with_coordinates() instead.
|
||
**/
|
||
GdkDragContext *
|
||
gtk_drag_begin (GtkWidget *widget,
|
||
GtkTargetList *targets,
|
||
GdkDragAction actions,
|
||
gint button,
|
||
GdkEvent *event)
|
||
{
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
|
||
g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
|
||
g_return_val_if_fail (targets != NULL, NULL);
|
||
|
||
return gtk_drag_begin_internal (widget, NULL, targets,
|
||
actions, button, event, -1, -1);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set: (method)
|
||
* @widget: a #GtkWidget
|
||
* @start_button_mask: the bitmask of buttons that can start the drag
|
||
* @targets: (allow-none) (array length=n_targets): the table of targets that the drag will support,
|
||
* may be %NULL
|
||
* @n_targets: the number of items in @targets
|
||
* @actions: the bitmask of possible actions for a drag from this widget
|
||
*
|
||
* Sets up a widget so that GTK+ will start a drag operation when the user
|
||
* clicks and drags on the widget. The widget must have a window.
|
||
*/
|
||
void
|
||
gtk_drag_source_set (GtkWidget *widget,
|
||
GdkModifierType start_button_mask,
|
||
const GtkTargetEntry *targets,
|
||
gint n_targets,
|
||
GdkDragAction actions)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
|
||
gtk_widget_add_events (widget,
|
||
gtk_widget_get_events (widget) |
|
||
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
|
||
GDK_BUTTON_MOTION_MASK);
|
||
|
||
if (site)
|
||
{
|
||
if (site->target_list)
|
||
gtk_target_list_unref (site->target_list);
|
||
}
|
||
else
|
||
{
|
||
site = g_slice_new0 (GtkDragSourceSite);
|
||
site->icon_helper = _gtk_icon_helper_new ();
|
||
|
||
g_signal_connect (widget, "button-press-event",
|
||
G_CALLBACK (gtk_drag_source_event_cb),
|
||
site);
|
||
g_signal_connect (widget, "button-release-event",
|
||
G_CALLBACK (gtk_drag_source_event_cb),
|
||
site);
|
||
g_signal_connect (widget, "motion-notify-event",
|
||
G_CALLBACK (gtk_drag_source_event_cb),
|
||
site);
|
||
|
||
g_object_set_data_full (G_OBJECT (widget),
|
||
I_("gtk-site-data"),
|
||
site, gtk_drag_source_site_destroy);
|
||
}
|
||
|
||
site->start_button_mask = start_button_mask;
|
||
|
||
site->target_list = gtk_target_list_new (targets, n_targets);
|
||
|
||
site->actions = actions;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_unset: (method)
|
||
* @widget: a #GtkWidget
|
||
*
|
||
* Undoes the effects of gtk_drag_source_set().
|
||
*/
|
||
void
|
||
gtk_drag_source_unset (GtkWidget *widget)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
|
||
if (site)
|
||
{
|
||
g_signal_handlers_disconnect_by_func (widget,
|
||
gtk_drag_source_event_cb,
|
||
site);
|
||
g_object_set_data (G_OBJECT (widget), I_("gtk-site-data"), NULL);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_get_target_list: (method)
|
||
* @widget: a #GtkWidget
|
||
*
|
||
* Gets the list of targets this widget can provide for
|
||
* drag-and-drop.
|
||
*
|
||
* Returns: (transfer none): the #GtkTargetList, or %NULL if none
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
GtkTargetList *
|
||
gtk_drag_source_get_target_list (GtkWidget *widget)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
|
||
return site ? site->target_list : NULL;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set_target_list: (method)
|
||
* @widget: a #GtkWidget that’s a drag source
|
||
* @target_list: (allow-none): list of draggable targets, or %NULL for none
|
||
*
|
||
* Changes the target types that this widget offers for drag-and-drop.
|
||
* The widget must first be made into a drag source with
|
||
* gtk_drag_source_set().
|
||
*
|
||
* Since: 2.4
|
||
**/
|
||
void
|
||
gtk_drag_source_set_target_list (GtkWidget *widget,
|
||
GtkTargetList *target_list)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
if (site == NULL)
|
||
{
|
||
g_warning ("gtk_drag_source_set_target_list() requires the widget "
|
||
"to already be a drag source.");
|
||
return;
|
||
}
|
||
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
|
||
if (site->target_list)
|
||
gtk_target_list_unref (site->target_list);
|
||
|
||
site->target_list = target_list;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_add_text_targets: (method)
|
||
* @widget: a #GtkWidget that’s is a drag source
|
||
*
|
||
* Add the text targets supported by #GtkSelectionData to
|
||
* the target list of the drag source. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_text_targets() and
|
||
* gtk_drag_source_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_source_add_text_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_source_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_text_targets (target_list, 0);
|
||
gtk_drag_source_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_add_image_targets: (method)
|
||
* @widget: a #GtkWidget that’s is a drag source
|
||
*
|
||
* Add the writable image targets supported by #GtkSelectionData to
|
||
* the target list of the drag source. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_image_targets() and
|
||
* gtk_drag_source_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_source_add_image_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_source_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_image_targets (target_list, 0, TRUE);
|
||
gtk_drag_source_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_add_uri_targets: (method)
|
||
* @widget: a #GtkWidget that’s is a drag source
|
||
*
|
||
* Add the URI targets supported by #GtkSelectionData to
|
||
* the target list of the drag source. The targets
|
||
* are added with @info = 0. If you need another value,
|
||
* use gtk_target_list_add_uri_targets() and
|
||
* gtk_drag_source_set_target_list().
|
||
*
|
||
* Since: 2.6
|
||
**/
|
||
void
|
||
gtk_drag_source_add_uri_targets (GtkWidget *widget)
|
||
{
|
||
GtkTargetList *target_list;
|
||
|
||
target_list = gtk_drag_source_get_target_list (widget);
|
||
if (target_list)
|
||
gtk_target_list_ref (target_list);
|
||
else
|
||
target_list = gtk_target_list_new (NULL, 0);
|
||
gtk_target_list_add_uri_targets (target_list, 0);
|
||
gtk_drag_source_set_target_list (widget, target_list);
|
||
gtk_target_list_unref (target_list);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set_icon_pixbuf: (method)
|
||
* @widget: a #GtkWidget
|
||
* @pixbuf: the #GdkPixbuf for the drag icon
|
||
*
|
||
* Sets the icon that will be used for drags from a particular widget
|
||
* from a #GdkPixbuf. GTK+ retains a reference for @pixbuf and will
|
||
* release it when it is no longer needed.
|
||
**/
|
||
void
|
||
gtk_drag_source_set_icon_pixbuf (GtkWidget *widget,
|
||
GdkPixbuf *pixbuf)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
g_return_if_fail (site != NULL);
|
||
g_object_ref (pixbuf);
|
||
|
||
_gtk_icon_helper_set_pixbuf (site->icon_helper, pixbuf);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set_icon_stock: (method)
|
||
* @widget: a #GtkWidget
|
||
* @stock_id: the ID of the stock icon to use
|
||
*
|
||
* Sets the icon that will be used for drags from a particular source
|
||
* to a stock icon.
|
||
*
|
||
* Deprecated: 3.10: Use gtk_drag_source_set_icon_name() instead.
|
||
**/
|
||
void
|
||
gtk_drag_source_set_icon_stock (GtkWidget *widget,
|
||
const gchar *stock_id)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (stock_id != NULL);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
g_return_if_fail (site != NULL);
|
||
|
||
_gtk_icon_helper_set_stock_id (site->icon_helper, stock_id, GTK_ICON_SIZE_DND);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set_icon_name: (method)
|
||
* @widget: a #GtkWidget
|
||
* @icon_name: name of icon to use
|
||
*
|
||
* Sets the icon that will be used for drags from a particular source
|
||
* to a themed icon. See the docs for #GtkIconTheme for more details.
|
||
*
|
||
* Since: 2.8
|
||
**/
|
||
void
|
||
gtk_drag_source_set_icon_name (GtkWidget *widget,
|
||
const gchar *icon_name)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (icon_name != NULL);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
g_return_if_fail (site != NULL);
|
||
|
||
_gtk_icon_helper_set_icon_name (site->icon_helper, icon_name, GTK_ICON_SIZE_DND);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_source_set_icon_gicon: (method)
|
||
* @widget: a #GtkWidget
|
||
* @icon: A #GIcon
|
||
*
|
||
* Sets the icon that will be used for drags from a particular source
|
||
* to @icon. See the docs for #GtkIconTheme for more details.
|
||
*
|
||
* Since: 3.2
|
||
**/
|
||
void
|
||
gtk_drag_source_set_icon_gicon (GtkWidget *widget,
|
||
GIcon *icon)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
g_return_if_fail (icon != NULL);
|
||
|
||
site = g_object_get_data (G_OBJECT (widget), "gtk-site-data");
|
||
g_return_if_fail (site != NULL);
|
||
|
||
_gtk_icon_helper_set_gicon (site->icon_helper, icon, GTK_ICON_SIZE_DND);
|
||
}
|
||
|
||
static void
|
||
gtk_drag_get_icon (GtkDragSourceInfo *info,
|
||
GtkWidget **icon_window,
|
||
gint *hot_x,
|
||
gint *hot_y)
|
||
{
|
||
if (get_can_change_screen (info->icon_window))
|
||
gtk_window_set_screen (GTK_WINDOW (info->icon_window),
|
||
info->cur_screen);
|
||
|
||
if (gtk_widget_get_screen (info->icon_window) != info->cur_screen)
|
||
{
|
||
if (!info->fallback_icon)
|
||
{
|
||
gint save_hot_x, save_hot_y;
|
||
gboolean save_destroy_icon;
|
||
GtkWidget *save_icon_window;
|
||
GtkIconHelper *helper;
|
||
|
||
/* HACK to get the appropriate icon
|
||
*/
|
||
save_icon_window = info->icon_window;
|
||
save_hot_x = info->hot_x;
|
||
save_hot_y = info->hot_x;
|
||
save_destroy_icon = info->destroy_icon;
|
||
|
||
info->icon_window = NULL;
|
||
|
||
helper = _gtk_icon_helper_new ();
|
||
_gtk_icon_helper_set_icon_name (helper, "text-x-generic", GTK_ICON_SIZE_DND);
|
||
set_icon_helper (info->context, helper, -2, -2, TRUE);
|
||
info->fallback_icon = info->icon_window;
|
||
|
||
info->icon_window = save_icon_window;
|
||
info->hot_x = save_hot_x;
|
||
info->hot_y = save_hot_y;
|
||
info->destroy_icon = save_destroy_icon;
|
||
|
||
g_object_unref (helper);
|
||
}
|
||
|
||
gtk_widget_hide (info->icon_window);
|
||
|
||
*icon_window = info->fallback_icon;
|
||
gtk_window_set_screen (GTK_WINDOW (*icon_window), info->cur_screen);
|
||
|
||
*hot_x = -2;
|
||
*hot_y = -2;
|
||
}
|
||
else
|
||
{
|
||
if (info->fallback_icon)
|
||
gtk_widget_hide (info->fallback_icon);
|
||
|
||
*icon_window = info->icon_window;
|
||
*hot_x = info->hot_x;
|
||
*hot_y = info->hot_y;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_drag_update_icon (GtkDragSourceInfo *info)
|
||
{
|
||
if (info->icon_window)
|
||
{
|
||
GtkWidget *icon_window;
|
||
gint hot_x, hot_y;
|
||
|
||
gtk_drag_get_icon (info, &icon_window, &hot_x, &hot_y);
|
||
|
||
gtk_window_move (GTK_WINDOW (icon_window),
|
||
info->cur_x - hot_x,
|
||
info->cur_y - hot_y);
|
||
|
||
if (gtk_widget_get_visible (icon_window))
|
||
gdk_window_raise (gtk_widget_get_window (icon_window));
|
||
else
|
||
gtk_widget_show (icon_window);
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_drag_set_icon_window (GdkDragContext *context,
|
||
GtkWidget *widget,
|
||
gint hot_x,
|
||
gint hot_y,
|
||
gboolean destroy_on_release)
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
|
||
info = gtk_drag_get_source_info (context, FALSE);
|
||
if (info == NULL)
|
||
{
|
||
if (destroy_on_release)
|
||
gtk_widget_destroy (widget);
|
||
return;
|
||
}
|
||
|
||
gtk_drag_remove_icon (info);
|
||
|
||
if (widget)
|
||
g_object_ref (widget);
|
||
|
||
info->icon_window = widget;
|
||
info->hot_x = hot_x;
|
||
info->hot_y = hot_y;
|
||
info->destroy_icon = destroy_on_release;
|
||
|
||
if (widget && info->icon_helper)
|
||
g_clear_object (&info->icon_helper);
|
||
|
||
gtk_drag_update_cursor (info);
|
||
gtk_drag_update_icon (info);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_widget: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
with a context for the source side of a drag)
|
||
* @widget: a toplevel window to use as an icon.
|
||
* @hot_x: the X offset within @widget of the hotspot.
|
||
* @hot_y: the Y offset within @widget of the hotspot.
|
||
*
|
||
* Changes the icon for a widget to a given widget. GTK+
|
||
* will not destroy the icon, so if you don’t want
|
||
* it to persist, you should connect to the “drag-end”
|
||
* signal and destroy it yourself.
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_widget (GdkDragContext *context,
|
||
GtkWidget *widget,
|
||
gint hot_x,
|
||
gint hot_y)
|
||
{
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (GTK_IS_WIDGET (widget));
|
||
|
||
gtk_drag_set_icon_window (context, widget, hot_x, hot_y, FALSE);
|
||
}
|
||
|
||
static void
|
||
icon_window_realize (GtkWidget *window,
|
||
GtkIconHelper *helper)
|
||
{
|
||
cairo_surface_t *surface;
|
||
cairo_pattern_t *pattern;
|
||
cairo_t *cr;
|
||
GdkPixbuf *pixbuf;
|
||
|
||
pixbuf = _gtk_icon_helper_ensure_pixbuf (helper, gtk_widget_get_style_context (window));
|
||
surface = gdk_window_create_similar_surface (gtk_widget_get_window (window),
|
||
CAIRO_CONTENT_COLOR,
|
||
gdk_pixbuf_get_width (pixbuf),
|
||
gdk_pixbuf_get_height (pixbuf));
|
||
|
||
cr = cairo_create (surface);
|
||
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
|
||
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
|
||
cairo_paint (cr);
|
||
cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
|
||
cairo_paint (cr);
|
||
cairo_pop_group_to_source (cr);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
|
||
pattern = cairo_pattern_create_for_surface (surface);
|
||
gdk_window_set_background_pattern (gtk_widget_get_window (window), pattern);
|
||
cairo_pattern_destroy (pattern);
|
||
|
||
cairo_surface_destroy (surface);
|
||
|
||
if (gdk_pixbuf_get_has_alpha (pixbuf))
|
||
{
|
||
cairo_region_t *region;
|
||
|
||
surface = cairo_image_surface_create (CAIRO_FORMAT_A1,
|
||
gdk_pixbuf_get_width (pixbuf),
|
||
gdk_pixbuf_get_height (pixbuf));
|
||
|
||
cr = cairo_create (surface);
|
||
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
|
||
region = gdk_cairo_region_create_from_surface (surface);
|
||
gtk_widget_shape_combine_region (window, region);
|
||
cairo_region_destroy (region);
|
||
|
||
cairo_surface_destroy (surface);
|
||
}
|
||
|
||
g_object_unref (pixbuf);
|
||
}
|
||
|
||
static void
|
||
set_icon_helper (GdkDragContext *context,
|
||
GtkIconHelper *helper,
|
||
gint hot_x,
|
||
gint hot_y,
|
||
gboolean force_window)
|
||
{
|
||
GtkWidget *window;
|
||
gint width, height;
|
||
GdkScreen *screen;
|
||
GdkDisplay *display;
|
||
|
||
g_return_if_fail (context != NULL);
|
||
g_return_if_fail (helper != NULL);
|
||
|
||
screen = gdk_window_get_screen (gdk_drag_context_get_source_window (context));
|
||
|
||
window = gtk_window_new (GTK_WINDOW_POPUP);
|
||
gtk_window_set_type_hint (GTK_WINDOW (window), GDK_WINDOW_TYPE_HINT_DND);
|
||
gtk_window_set_screen (GTK_WINDOW (window), screen);
|
||
set_can_change_screen (window, TRUE);
|
||
|
||
gtk_widget_set_events (window, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
|
||
gtk_widget_set_app_paintable (window, TRUE);
|
||
|
||
display = gdk_window_get_display (gdk_drag_context_get_source_window (context));
|
||
_gtk_icon_helper_get_size (helper,
|
||
gtk_widget_get_style_context (window),
|
||
&width, &height);
|
||
|
||
if (!force_window &&
|
||
gtk_drag_can_use_rgba_cursor (display, width + 2, height + 2))
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
|
||
gtk_widget_destroy (window);
|
||
|
||
info = gtk_drag_get_source_info (context, FALSE);
|
||
|
||
if (info->icon_helper)
|
||
g_object_unref (info->icon_helper);
|
||
info->icon_helper = g_object_ref (helper);
|
||
|
||
gtk_drag_set_icon_window (context, NULL, hot_x, hot_y, TRUE);
|
||
}
|
||
else
|
||
{
|
||
gtk_widget_set_size_request (window, width, height);
|
||
|
||
g_signal_connect_closure (window, "realize",
|
||
g_cclosure_new (G_CALLBACK (icon_window_realize),
|
||
g_object_ref (helper),
|
||
(GClosureNotify)g_object_unref),
|
||
FALSE);
|
||
|
||
gtk_drag_set_icon_window (context, window, hot_x, hot_y, TRUE);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_pixbuf: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
* with a context for the source side of a drag)
|
||
* @pixbuf: the #GdkPixbuf to use as the drag icon.
|
||
* @hot_x: the X offset within @widget of the hotspot.
|
||
* @hot_y: the Y offset within @widget of the hotspot.
|
||
*
|
||
* Sets @pixbuf as the icon for a given drag.
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_pixbuf (GdkDragContext *context,
|
||
GdkPixbuf *pixbuf,
|
||
gint hot_x,
|
||
gint hot_y)
|
||
{
|
||
GtkIconHelper *icon;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
|
||
|
||
icon = _gtk_icon_helper_new ();
|
||
_gtk_icon_helper_set_pixbuf (icon, pixbuf);
|
||
set_icon_helper (context, icon, hot_x, hot_y, FALSE);
|
||
|
||
g_object_unref (icon);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_stock: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
* with a context for the source side of a drag)
|
||
* @stock_id: the ID of the stock icon to use for the drag.
|
||
* @hot_x: the X offset within the icon of the hotspot.
|
||
* @hot_y: the Y offset within the icon of the hotspot.
|
||
*
|
||
* Sets the icon for a given drag from a stock ID.
|
||
*
|
||
* Deprecated: 3.10: Use gtk_drag_set_icon_name() instead.
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_stock (GdkDragContext *context,
|
||
const gchar *stock_id,
|
||
gint hot_x,
|
||
gint hot_y)
|
||
{
|
||
GtkIconHelper *icon;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (stock_id != NULL);
|
||
|
||
icon = _gtk_icon_helper_new ();
|
||
_gtk_icon_helper_set_stock_id (icon, stock_id, GTK_ICON_SIZE_DND);
|
||
set_icon_helper (context, icon, hot_x, hot_y, FALSE);
|
||
|
||
g_object_unref (icon);
|
||
}
|
||
|
||
/* XXX: This function is in gdk, too. Should it be in Cairo? */
|
||
static gboolean
|
||
_gtk_cairo_surface_extents (cairo_surface_t *surface,
|
||
GdkRectangle *extents)
|
||
{
|
||
double x1, x2, y1, y2;
|
||
cairo_t *cr;
|
||
|
||
g_return_val_if_fail (surface != NULL, FALSE);
|
||
g_return_val_if_fail (extents != NULL, FALSE);
|
||
|
||
cr = cairo_create (surface);
|
||
cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
|
||
|
||
x1 = floor (x1);
|
||
y1 = floor (y1);
|
||
x2 = ceil (x2);
|
||
y2 = ceil (y2);
|
||
x2 -= x1;
|
||
y2 -= y1;
|
||
|
||
if (x1 < G_MININT || x1 > G_MAXINT ||
|
||
y1 < G_MININT || y1 > G_MAXINT ||
|
||
x2 > G_MAXINT || y2 > G_MAXINT)
|
||
{
|
||
extents->x = extents->y = extents->width = extents->height = 0;
|
||
return FALSE;
|
||
}
|
||
|
||
extents->x = x1;
|
||
extents->y = y1;
|
||
extents->width = x2;
|
||
extents->height = y2;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_surface: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
* with a context for the source side of a drag)
|
||
* @surface: the surface to use as icon
|
||
*
|
||
* Sets @surface as the icon for a given drag. GTK+ retains
|
||
* references for the arguments, and will release them when
|
||
* they are no longer needed.
|
||
*
|
||
* To position the surface relative to the mouse, use
|
||
* cairo_surface_set_device_offset() on @surface. The mouse
|
||
* cursor will be positioned at the (0,0) coordinate of the
|
||
* surface.
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_surface (GdkDragContext *context,
|
||
cairo_surface_t *surface)
|
||
{
|
||
GtkWidget *window;
|
||
GdkScreen *screen;
|
||
GdkRectangle extents;
|
||
cairo_pattern_t *pattern;
|
||
GdkVisual *rgba_visual;
|
||
gboolean has_rgba;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (surface != NULL);
|
||
|
||
_gtk_cairo_surface_extents (surface, &extents);
|
||
|
||
|
||
screen = gdk_window_get_screen (gdk_drag_context_get_source_window (context));
|
||
rgba_visual = gdk_screen_get_rgba_visual (screen);
|
||
|
||
window = gtk_window_new (GTK_WINDOW_POPUP);
|
||
has_rgba =
|
||
rgba_visual != NULL &&
|
||
gdk_screen_is_composited (screen);
|
||
if (has_rgba)
|
||
gtk_widget_set_visual (GTK_WIDGET (window), rgba_visual);
|
||
|
||
gtk_window_set_type_hint (GTK_WINDOW (window), GDK_WINDOW_TYPE_HINT_DND);
|
||
gtk_window_set_screen (GTK_WINDOW (window), screen);
|
||
set_can_change_screen (window, TRUE);
|
||
|
||
gtk_widget_set_events (window, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
|
||
gtk_widget_set_app_paintable (window, TRUE);
|
||
|
||
gtk_widget_set_size_request (window, extents.width, extents.height);
|
||
gtk_widget_realize (window);
|
||
|
||
if (cairo_surface_get_content (surface) != CAIRO_CONTENT_COLOR &&
|
||
!has_rgba)
|
||
{
|
||
cairo_surface_t *saturated;
|
||
cairo_region_t *region;
|
||
cairo_t *cr;
|
||
|
||
region = gdk_cairo_region_create_from_surface (surface);
|
||
cairo_region_translate (region, -extents.x, -extents.y);
|
||
|
||
gtk_widget_shape_combine_region (window, region);
|
||
cairo_region_destroy (region);
|
||
|
||
/* Need to saturate the colors, so it doesn't look like semi-transparent
|
||
* pixels were painted on black. */
|
||
saturated = gdk_window_create_similar_surface (gtk_widget_get_window (window),
|
||
CAIRO_CONTENT_COLOR,
|
||
extents.width,
|
||
extents.height);
|
||
|
||
cr = cairo_create (saturated);
|
||
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
|
||
cairo_set_source_surface (cr, surface, -extents.x, -extents.y);
|
||
cairo_paint (cr);
|
||
cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
|
||
cairo_paint (cr);
|
||
cairo_pop_group_to_source (cr);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
|
||
pattern = cairo_pattern_create_for_surface (saturated);
|
||
|
||
cairo_surface_destroy (saturated);
|
||
}
|
||
else
|
||
{
|
||
cairo_matrix_t matrix;
|
||
|
||
pattern = cairo_pattern_create_for_surface (surface);
|
||
cairo_matrix_init_translate (&matrix, extents.x, extents.y);
|
||
cairo_pattern_set_matrix (pattern, &matrix);
|
||
}
|
||
|
||
gdk_window_set_background_pattern (gtk_widget_get_window (window), pattern);
|
||
cairo_pattern_destroy (pattern);
|
||
|
||
gtk_drag_set_icon_window (context, window, extents.x, extents.y, TRUE);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_name: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
* with a context for the source side of a drag)
|
||
* @icon_name: name of icon to use
|
||
* @hot_x: the X offset of the hotspot within the icon
|
||
* @hot_y: the Y offset of the hotspot within the icon
|
||
*
|
||
* Sets the icon for a given drag from a named themed icon. See
|
||
* the docs for #GtkIconTheme for more details. Note that the
|
||
* size of the icon depends on the icon theme (the icon is
|
||
* loaded at the symbolic size #GTK_ICON_SIZE_DND), thus
|
||
* @hot_x and @hot_y have to be used with care.
|
||
*
|
||
* Since: 2.8
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_name (GdkDragContext *context,
|
||
const gchar *icon_name,
|
||
gint hot_x,
|
||
gint hot_y)
|
||
{
|
||
GtkIconHelper *icon;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (icon_name != NULL);
|
||
|
||
icon = _gtk_icon_helper_new ();
|
||
_gtk_icon_helper_set_icon_name (icon, icon_name, GTK_ICON_SIZE_DND);
|
||
set_icon_helper (context, icon, hot_x, hot_y, FALSE);
|
||
|
||
g_object_unref (icon);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_gicon: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
* with a context for the source side of a drag)
|
||
* @icon: a #GIcon
|
||
* @hot_x: the X offset of the hotspot within the icon
|
||
* @hot_y: the Y offset of the hotspot within the icon
|
||
*
|
||
* Sets the icon for a given drag from the given @icon. See the
|
||
* documentation for gtk_drag_set_icon_name() for more details about
|
||
* using icons in drag and drop.
|
||
*
|
||
* Since: 3.2
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_gicon (GdkDragContext *context,
|
||
GIcon *icon,
|
||
gint hot_x,
|
||
gint hot_y)
|
||
{
|
||
GtkIconHelper *helper;
|
||
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
g_return_if_fail (icon != NULL);
|
||
|
||
helper = _gtk_icon_helper_new ();
|
||
_gtk_icon_helper_set_gicon (helper, icon, GTK_ICON_SIZE_DND);
|
||
set_icon_helper (context, helper, hot_x, hot_y, FALSE);
|
||
|
||
g_object_unref (helper);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_set_icon_default: (method)
|
||
* @context: the context for a drag. (This must be called
|
||
with a context for the source side of a drag)
|
||
*
|
||
* Sets the icon for a particular drag to the default
|
||
* icon.
|
||
**/
|
||
void
|
||
gtk_drag_set_icon_default (GdkDragContext *context)
|
||
{
|
||
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
|
||
|
||
gtk_drag_set_icon_name (context, "text-x-generic", -2, -2);
|
||
}
|
||
|
||
/*************************************************************
|
||
* _gtk_drag_source_handle_event:
|
||
* Called from widget event handling code on Drag events
|
||
* for drag sources.
|
||
*
|
||
* arguments:
|
||
* toplevel: Toplevel widget that received the event
|
||
* event:
|
||
* results:
|
||
*************************************************************/
|
||
|
||
void
|
||
_gtk_drag_source_handle_event (GtkWidget *widget,
|
||
GdkEvent *event)
|
||
{
|
||
GtkDragSourceInfo *info;
|
||
GdkDragContext *context;
|
||
|
||
g_return_if_fail (widget != NULL);
|
||
g_return_if_fail (event != NULL);
|
||
|
||
context = event->dnd.context;
|
||
info = gtk_drag_get_source_info (context, FALSE);
|
||
if (!info)
|
||
return;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_DRAG_STATUS:
|
||
{
|
||
GdkCursor *cursor;
|
||
|
||
if (info->proxy_dest)
|
||
{
|
||
if (!event->dnd.send_event)
|
||
{
|
||
if (info->proxy_dest->proxy_drop_wait)
|
||
{
|
||
gboolean result = gdk_drag_context_get_selected_action (context) != 0;
|
||
|
||
/* Aha - we can finally pass the DROP on... */
|
||
gdk_drop_reply (info->proxy_dest->context, result, info->proxy_dest->proxy_drop_time);
|
||
if (result)
|
||
gdk_drag_drop (info->context, info->proxy_dest->proxy_drop_time);
|
||
else
|
||
gtk_drag_finish (info->proxy_dest->context, FALSE, FALSE, info->proxy_dest->proxy_drop_time);
|
||
}
|
||
else
|
||
{
|
||
gdk_drag_status (info->proxy_dest->context,
|
||
gdk_drag_context_get_selected_action (event->dnd.context),
|
||
event->dnd.time);
|
||
}
|
||
}
|
||
}
|
||
else if (info->have_grab)
|
||
{
|
||
cursor = gtk_drag_get_cursor (widget,
|
||
gtk_widget_get_display (widget),
|
||
gdk_drag_context_get_selected_action (event->dnd.context),
|
||
info);
|
||
if (info->cursor != cursor)
|
||
{
|
||
GdkDevice *pointer;
|
||
|
||
pointer = gdk_drag_context_get_device (context);
|
||
gdk_device_grab (pointer, gtk_widget_get_window (widget),
|
||
GDK_OWNERSHIP_APPLICATION, FALSE,
|
||
GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
|
||
cursor, info->grab_time);
|
||
info->cursor = cursor;
|
||
}
|
||
|
||
gtk_drag_add_update_idle (info);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case GDK_DROP_FINISHED:
|
||
gtk_drag_drop_finished (info, GTK_DRAG_RESULT_SUCCESS, event->dnd.time);
|
||
break;
|
||
default:
|
||
g_assert_not_reached ();
|
||
}
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_source_check_selection:
|
||
* Check if we’ve set up handlers/claimed the selection
|
||
* for a given drag. If not, add them.
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_drag_source_check_selection (GtkDragSourceInfo *info,
|
||
GdkAtom selection,
|
||
guint32 time)
|
||
{
|
||
GList *tmp_list;
|
||
|
||
tmp_list = info->selections;
|
||
while (tmp_list)
|
||
{
|
||
if (GDK_POINTER_TO_ATOM (tmp_list->data) == selection)
|
||
return;
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
gtk_selection_owner_set_for_display (gtk_widget_get_display (info->widget),
|
||
info->ipc_widget,
|
||
selection,
|
||
time);
|
||
info->selections = g_list_prepend (info->selections,
|
||
GUINT_TO_POINTER (selection));
|
||
|
||
tmp_list = info->target_list->list;
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
|
||
gtk_selection_add_target (info->ipc_widget,
|
||
selection,
|
||
pair->target,
|
||
pair->info);
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
gtk_selection_add_target (info->ipc_widget,
|
||
selection,
|
||
gdk_atom_intern_static_string ("DELETE"),
|
||
TARGET_DELETE);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_drop_finished:
|
||
* Clean up from the drag, and display snapback, if necessary.
|
||
* arguments:
|
||
* info:
|
||
* success:
|
||
* time:
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_drag_drop_finished (GtkDragSourceInfo *info,
|
||
GtkDragResult result,
|
||
guint time)
|
||
{
|
||
gboolean success;
|
||
|
||
success = (result == GTK_DRAG_RESULT_SUCCESS);
|
||
gtk_drag_source_release_selections (info, time);
|
||
|
||
if (info->proxy_dest)
|
||
{
|
||
/* The time from the event isn't reliable for Xdnd drags */
|
||
gtk_drag_finish (info->proxy_dest->context, success, FALSE,
|
||
info->proxy_dest->proxy_drop_time);
|
||
gtk_drag_source_info_destroy (info);
|
||
}
|
||
else
|
||
{
|
||
if (!success)
|
||
g_signal_emit_by_name (info->widget, "drag-failed",
|
||
info->context, result, &success);
|
||
|
||
if (success)
|
||
{
|
||
gtk_drag_source_info_destroy (info);
|
||
}
|
||
else
|
||
{
|
||
GtkDragAnim *anim = g_slice_new0 (GtkDragAnim);
|
||
anim->info = info;
|
||
anim->start_time = gdk_frame_clock_get_frame_time (gtk_widget_get_frame_clock (info->widget));
|
||
|
||
info->cur_screen = gtk_widget_get_screen (info->widget);
|
||
|
||
if (!info->icon_window)
|
||
set_icon_helper (info->context, info->icon_helper,
|
||
0, 0, TRUE);
|
||
|
||
gtk_drag_update_icon (info);
|
||
|
||
/* Mark the context as dead, so if the destination decides
|
||
* to respond really late, we still are OK.
|
||
*/
|
||
gtk_drag_clear_source_info (info->context);
|
||
gtk_widget_add_tick_callback (info->widget, gtk_drag_anim_tick, anim, (GDestroyNotify) gtk_drag_anim_destroy);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_drag_source_release_selections (GtkDragSourceInfo *info,
|
||
guint32 time)
|
||
{
|
||
GdkDisplay *display = gtk_widget_get_display (info->widget);
|
||
GList *tmp_list = info->selections;
|
||
|
||
while (tmp_list)
|
||
{
|
||
GdkAtom selection = GDK_POINTER_TO_ATOM (tmp_list->data);
|
||
if (gdk_selection_owner_get_for_display (display, selection) == gtk_widget_get_window (info->ipc_widget))
|
||
gtk_selection_owner_set_for_display (display, NULL, selection, time);
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
g_list_free (info->selections);
|
||
info->selections = NULL;
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_drop:
|
||
* Send a drop event.
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_drag_drop (GtkDragSourceInfo *info,
|
||
guint32 time)
|
||
{
|
||
if (gdk_drag_context_get_protocol (info->context) == GDK_DRAG_PROTO_ROOTWIN)
|
||
{
|
||
GtkSelectionData selection_data;
|
||
GList *tmp_list;
|
||
/* GTK+ traditionally has used application/x-rootwin-drop, but the
|
||
* XDND spec specifies x-rootwindow-drop.
|
||
*/
|
||
GdkAtom target1 = gdk_atom_intern_static_string ("application/x-rootwindow-drop");
|
||
GdkAtom target2 = gdk_atom_intern_static_string ("application/x-rootwin-drop");
|
||
|
||
tmp_list = info->target_list->list;
|
||
while (tmp_list)
|
||
{
|
||
GtkTargetPair *pair = tmp_list->data;
|
||
|
||
if (pair->target == target1 || pair->target == target2)
|
||
{
|
||
selection_data.selection = GDK_NONE;
|
||
selection_data.target = pair->target;
|
||
selection_data.data = NULL;
|
||
selection_data.length = -1;
|
||
|
||
g_signal_emit_by_name (info->widget, "drag-data-get",
|
||
info->context, &selection_data,
|
||
pair->info,
|
||
time);
|
||
|
||
/* FIXME: Should we check for length >= 0 here? */
|
||
gtk_drag_drop_finished (info, GTK_DRAG_RESULT_SUCCESS, time);
|
||
return;
|
||
}
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
gtk_drag_drop_finished (info, GTK_DRAG_RESULT_NO_TARGET, time);
|
||
}
|
||
else
|
||
{
|
||
if (info->icon_window)
|
||
gtk_widget_hide (info->icon_window);
|
||
|
||
gdk_drag_drop (info->context, time);
|
||
info->drop_timeout = gdk_threads_add_timeout (DROP_ABORT_TIME,
|
||
gtk_drag_abort_timeout,
|
||
info);
|
||
g_source_set_name_by_id (info->drop_timeout, "[gtk+] gtk_drag_abort_timeout");
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Source side callbacks.
|
||
*/
|
||
|
||
static gboolean
|
||
gtk_drag_source_event_cb (GtkWidget *widget,
|
||
GdkEvent *event,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceSite *site;
|
||
gboolean retval = FALSE;
|
||
site = (GtkDragSourceSite *)data;
|
||
|
||
switch (event->type)
|
||
{
|
||
case GDK_BUTTON_PRESS:
|
||
if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
|
||
{
|
||
site->state |= (GDK_BUTTON1_MASK << (event->button.button - 1));
|
||
site->x = event->button.x;
|
||
site->y = event->button.y;
|
||
}
|
||
break;
|
||
|
||
case GDK_BUTTON_RELEASE:
|
||
if ((GDK_BUTTON1_MASK << (event->button.button - 1)) & site->start_button_mask)
|
||
site->state &= ~(GDK_BUTTON1_MASK << (event->button.button - 1));
|
||
break;
|
||
|
||
case GDK_MOTION_NOTIFY:
|
||
if (site->state & event->motion.state & site->start_button_mask)
|
||
{
|
||
/* FIXME: This is really broken and can leave us
|
||
* with a stuck grab
|
||
*/
|
||
int i;
|
||
for (i=1; i<6; i++)
|
||
{
|
||
if (site->state & event->motion.state &
|
||
GDK_BUTTON1_MASK << (i - 1))
|
||
break;
|
||
}
|
||
|
||
if (gtk_drag_check_threshold (widget, site->x, site->y,
|
||
event->motion.x, event->motion.y))
|
||
{
|
||
site->state = 0;
|
||
gtk_drag_begin_internal (widget, site, site->target_list,
|
||
site->actions, i, event,
|
||
site->x, site->y);
|
||
|
||
retval = TRUE;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default: /* hit for 2/3BUTTON_PRESS */
|
||
break;
|
||
}
|
||
|
||
return retval;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_source_site_destroy (gpointer data)
|
||
{
|
||
GtkDragSourceSite *site = data;
|
||
|
||
if (site->target_list)
|
||
gtk_target_list_unref (site->target_list);
|
||
|
||
g_clear_object (&site->icon_helper);
|
||
g_slice_free (GtkDragSourceSite, site);
|
||
}
|
||
|
||
static void
|
||
gtk_drag_selection_get (GtkWidget *widget,
|
||
GtkSelectionData *selection_data,
|
||
guint sel_info,
|
||
guint32 time,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = data;
|
||
static GdkAtom null_atom = GDK_NONE;
|
||
guint target_info;
|
||
|
||
if (!null_atom)
|
||
null_atom = gdk_atom_intern_static_string ("NULL");
|
||
|
||
switch (sel_info)
|
||
{
|
||
case TARGET_DELETE:
|
||
g_signal_emit_by_name (info->widget,
|
||
"drag-data-delete",
|
||
info->context);
|
||
gtk_selection_data_set (selection_data, null_atom, 8, NULL, 0);
|
||
break;
|
||
default:
|
||
if (info->proxy_dest)
|
||
{
|
||
/* This is sort of dangerous and needs to be thought
|
||
* through better
|
||
*/
|
||
info->proxy_dest->proxy_data = selection_data;
|
||
gtk_drag_get_data (info->widget,
|
||
info->proxy_dest->context,
|
||
gtk_selection_data_get_target (selection_data),
|
||
time);
|
||
gtk_main ();
|
||
info->proxy_dest->proxy_data = NULL;
|
||
}
|
||
else
|
||
{
|
||
if (gtk_target_list_find (info->target_list,
|
||
gtk_selection_data_get_target (selection_data),
|
||
&target_info))
|
||
{
|
||
g_signal_emit_by_name (info->widget, "drag-data-get",
|
||
info->context,
|
||
selection_data,
|
||
target_info,
|
||
time);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* From clutter-easing.c, based on Robert Penner's
|
||
* infamous easing equations, MIT license.
|
||
*/
|
||
static double
|
||
ease_out_cubic (double t)
|
||
{
|
||
double p = t - 1;
|
||
return p * p * p + 1;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_anim_destroy (GtkDragAnim *anim)
|
||
{
|
||
gtk_drag_source_info_destroy (anim->info);
|
||
g_slice_free (GtkDragAnim, anim);
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_anim_tick (GtkWidget *widget,
|
||
GdkFrameClock *frame_clock,
|
||
gpointer data)
|
||
{
|
||
GtkWidget *icon_window;
|
||
GtkDragAnim *anim = data;
|
||
GtkDragSourceInfo *info = anim->info;
|
||
gint64 current_time = gdk_frame_clock_get_frame_time (frame_clock);
|
||
int hot_x, hot_y;
|
||
double f = (current_time - anim->start_time) / (double) ANIM_TIME;
|
||
double t;
|
||
|
||
if (f >= 1.0)
|
||
return G_SOURCE_REMOVE;
|
||
|
||
t = ease_out_cubic (f);
|
||
|
||
gtk_drag_get_icon (info, &icon_window, &hot_x, &hot_y);
|
||
gtk_window_move (GTK_WINDOW (icon_window),
|
||
(info->cur_x + (info->start_x - info->cur_x) * t) - hot_x,
|
||
(info->cur_y + (info->start_y - info->cur_y) * t) - hot_y);
|
||
gtk_widget_set_opacity (icon_window, (1.0 - f));
|
||
|
||
return G_SOURCE_CONTINUE;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_remove_icon (GtkDragSourceInfo *info)
|
||
{
|
||
if (info->icon_window)
|
||
{
|
||
gtk_widget_hide (info->icon_window);
|
||
if (info->destroy_icon)
|
||
gtk_widget_destroy (info->icon_window);
|
||
|
||
if (info->fallback_icon)
|
||
{
|
||
gtk_widget_destroy (info->fallback_icon);
|
||
info->fallback_icon = NULL;
|
||
}
|
||
|
||
g_object_unref (info->icon_window);
|
||
info->icon_window = NULL;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_drag_source_info_destroy (GtkDragSourceInfo *info)
|
||
{
|
||
gint i;
|
||
|
||
for (i = 0; i < G_N_ELEMENTS (drag_cursors); i++)
|
||
{
|
||
if (info->drag_cursors[i] != NULL)
|
||
{
|
||
g_object_unref (info->drag_cursors[i]);
|
||
info->drag_cursors[i] = NULL;
|
||
}
|
||
}
|
||
|
||
gtk_drag_remove_icon (info);
|
||
g_clear_object (&info->icon_helper);
|
||
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_grab_broken_event_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_grab_notify_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_button_release_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_motion_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_key_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_selection_get,
|
||
info);
|
||
|
||
if (!info->proxy_dest)
|
||
g_signal_emit_by_name (info->widget, "drag-end", info->context);
|
||
|
||
if (info->widget)
|
||
g_object_unref (info->widget);
|
||
|
||
gtk_selection_remove_all (info->ipc_widget);
|
||
g_object_set_data (G_OBJECT (info->ipc_widget), I_("gtk-info"), NULL);
|
||
source_widgets = g_slist_remove (source_widgets, info->ipc_widget);
|
||
gtk_drag_release_ipc_widget (info->ipc_widget);
|
||
|
||
gtk_target_list_unref (info->target_list);
|
||
|
||
gtk_drag_clear_source_info (info->context);
|
||
g_object_unref (info->context);
|
||
|
||
if (info->drop_timeout)
|
||
g_source_remove (info->drop_timeout);
|
||
|
||
if (info->update_idle)
|
||
g_source_remove (info->update_idle);
|
||
|
||
g_free (info);
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_update_idle (gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = data;
|
||
GdkWindow *dest_window;
|
||
GdkDragProtocol protocol;
|
||
GdkAtom selection;
|
||
|
||
GdkDragAction action;
|
||
GdkDragAction possible_actions;
|
||
guint32 time;
|
||
|
||
info->update_idle = 0;
|
||
|
||
if (info->last_event)
|
||
{
|
||
time = gtk_drag_get_event_time (info->last_event);
|
||
gtk_drag_get_event_actions (info->last_event,
|
||
info->button,
|
||
info->possible_actions,
|
||
&action, &possible_actions);
|
||
gtk_drag_update_icon (info);
|
||
gdk_drag_find_window_for_screen (info->context,
|
||
info->icon_window ? gtk_widget_get_window (info->icon_window) : NULL,
|
||
info->cur_screen, info->cur_x, info->cur_y,
|
||
&dest_window, &protocol);
|
||
|
||
if (!gdk_drag_motion (info->context, dest_window, protocol,
|
||
info->cur_x, info->cur_y, action,
|
||
possible_actions,
|
||
time))
|
||
{
|
||
gdk_event_free ((GdkEvent *)info->last_event);
|
||
info->last_event = NULL;
|
||
}
|
||
|
||
if (dest_window)
|
||
g_object_unref (dest_window);
|
||
|
||
selection = gdk_drag_get_selection (info->context);
|
||
if (selection)
|
||
gtk_drag_source_check_selection (info, selection, time);
|
||
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_add_update_idle (GtkDragSourceInfo *info)
|
||
{
|
||
/* We use an idle lower than GDK_PRIORITY_REDRAW so that exposes
|
||
* from the last move can catch up before we move again.
|
||
*/
|
||
if (!info->update_idle)
|
||
info->update_idle = gdk_threads_add_idle_full (GDK_PRIORITY_REDRAW + 5,
|
||
gtk_drag_update_idle,
|
||
info,
|
||
NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_update:
|
||
* @info: DragSourceInfo for the drag
|
||
* @screen: new screen
|
||
* @x_root: new X position
|
||
* @y_root: new y position
|
||
* @event: event received requiring update
|
||
*
|
||
* Updates the status of the drag; called when the
|
||
* cursor moves or the modifier changes
|
||
**/
|
||
static void
|
||
gtk_drag_update (GtkDragSourceInfo *info,
|
||
GdkScreen *screen,
|
||
gint x_root,
|
||
gint y_root,
|
||
GdkEvent *event)
|
||
{
|
||
info->cur_screen = screen;
|
||
info->cur_x = x_root;
|
||
info->cur_y = y_root;
|
||
if (info->last_event)
|
||
{
|
||
gdk_event_free ((GdkEvent *)info->last_event);
|
||
info->last_event = NULL;
|
||
}
|
||
if (event)
|
||
info->last_event = gdk_event_copy ((GdkEvent *)event);
|
||
|
||
gtk_drag_add_update_idle (info);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_end:
|
||
* Called when the user finishes to drag, either by
|
||
* releasing the mouse, or by pressing Esc.
|
||
* arguments:
|
||
* info: Source info for the drag
|
||
* time: Timestamp for ending the drag
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_drag_end (GtkDragSourceInfo *info, guint32 time)
|
||
{
|
||
GtkWidget *source_widget = info->widget;
|
||
GdkDevice *pointer, *keyboard;
|
||
|
||
pointer = gdk_drag_context_get_device (info->context);
|
||
keyboard = gdk_device_get_associated_device (pointer);
|
||
|
||
/* Prevent ungrab before grab (see bug 623865) */
|
||
if (info->grab_time == GDK_CURRENT_TIME)
|
||
time = GDK_CURRENT_TIME;
|
||
|
||
if (info->update_idle)
|
||
{
|
||
g_source_remove (info->update_idle);
|
||
info->update_idle = 0;
|
||
}
|
||
|
||
if (info->last_event)
|
||
{
|
||
gdk_event_free (info->last_event);
|
||
info->last_event = NULL;
|
||
}
|
||
|
||
info->have_grab = FALSE;
|
||
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_grab_broken_event_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_grab_notify_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_button_release_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_motion_cb,
|
||
info);
|
||
g_signal_handlers_disconnect_by_func (info->ipc_widget,
|
||
gtk_drag_key_cb,
|
||
info);
|
||
|
||
gdk_device_ungrab (pointer, time);
|
||
ungrab_dnd_keys (info->ipc_widget, keyboard, time);
|
||
gtk_device_grab_remove (info->ipc_widget, pointer);
|
||
|
||
if (gtk_widget_get_realized (source_widget))
|
||
{
|
||
GdkEvent *send_event;
|
||
|
||
/* Send on a release pair to the original widget to convince it
|
||
* to release its grab. We need to call gtk_propagate_event()
|
||
* here, instead of gtk_widget_event() because widget like
|
||
* GtkList may expect propagation.
|
||
*/
|
||
|
||
send_event = gdk_event_new (GDK_BUTTON_RELEASE);
|
||
send_event->button.window = g_object_ref (gdk_screen_get_root_window (gtk_widget_get_screen (source_widget)));
|
||
send_event->button.send_event = TRUE;
|
||
send_event->button.time = time;
|
||
send_event->button.x = 0;
|
||
send_event->button.y = 0;
|
||
send_event->button.axes = NULL;
|
||
send_event->button.state = 0;
|
||
send_event->button.button = info->button;
|
||
send_event->button.device = pointer;
|
||
send_event->button.x_root = 0;
|
||
send_event->button.y_root = 0;
|
||
|
||
gtk_propagate_event (source_widget, send_event);
|
||
gdk_event_free (send_event);
|
||
}
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_cancel:
|
||
* Called on cancellation of a drag, either by the user
|
||
* or programmatically.
|
||
* arguments:
|
||
* info: Source info for the drag
|
||
* time: Timestamp for ending the drag
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static void
|
||
gtk_drag_cancel (GtkDragSourceInfo *info, GtkDragResult result, guint32 time)
|
||
{
|
||
gtk_drag_end (info, time);
|
||
gdk_drag_abort (info->context, time);
|
||
gtk_drag_drop_finished (info, result, time);
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_motion_cb:
|
||
* “motion-notify-event” callback during drag.
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static gboolean
|
||
gtk_drag_motion_cb (GtkWidget *widget,
|
||
GdkEventMotion *event,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
|
||
GdkScreen *screen;
|
||
gint x_root, y_root;
|
||
|
||
if (event->is_hint)
|
||
{
|
||
gdk_device_get_position (event->device, &screen, &x_root, &y_root);
|
||
event->x_root = x_root;
|
||
event->y_root = y_root;
|
||
}
|
||
else
|
||
screen = gdk_event_get_screen ((GdkEvent *)event);
|
||
|
||
x_root = (gint)(event->x_root + 0.5);
|
||
y_root = (gint)(event->y_root + 0.5);
|
||
gtk_drag_update (info, screen, x_root, y_root, (GdkEvent *) event);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/*************************************************************
|
||
* gtk_drag_key_cb:
|
||
* “key-press/release-event” callback during drag.
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
#define BIG_STEP 20
|
||
#define SMALL_STEP 1
|
||
|
||
static gboolean
|
||
gtk_drag_key_cb (GtkWidget *widget,
|
||
GdkEventKey *event,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
|
||
GdkModifierType state;
|
||
GdkWindow *root_window;
|
||
GdkDevice *pointer;
|
||
gint dx, dy;
|
||
|
||
dx = dy = 0;
|
||
state = event->state & gtk_accelerator_get_default_mod_mask ();
|
||
pointer = gdk_device_get_associated_device (gdk_event_get_device ((GdkEvent *) event));
|
||
|
||
if (event->type == GDK_KEY_PRESS)
|
||
{
|
||
switch (event->keyval)
|
||
{
|
||
case GDK_KEY_Escape:
|
||
gtk_drag_cancel (info, GTK_DRAG_RESULT_USER_CANCELLED, event->time);
|
||
return TRUE;
|
||
|
||
case GDK_KEY_space:
|
||
case GDK_KEY_Return:
|
||
case GDK_KEY_ISO_Enter:
|
||
case GDK_KEY_KP_Enter:
|
||
case GDK_KEY_KP_Space:
|
||
if ((gdk_drag_context_get_selected_action (info->context) != 0) &&
|
||
(gdk_drag_context_get_dest_window (info->context) != NULL))
|
||
{
|
||
gtk_drag_end (info, event->time);
|
||
gtk_drag_drop (info, event->time);
|
||
}
|
||
else
|
||
{
|
||
gtk_drag_cancel (info, GTK_DRAG_RESULT_NO_TARGET, event->time);
|
||
}
|
||
|
||
return TRUE;
|
||
|
||
case GDK_KEY_Up:
|
||
case GDK_KEY_KP_Up:
|
||
dy = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
|
||
break;
|
||
|
||
case GDK_KEY_Down:
|
||
case GDK_KEY_KP_Down:
|
||
dy = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
|
||
break;
|
||
|
||
case GDK_KEY_Left:
|
||
case GDK_KEY_KP_Left:
|
||
dx = (state & GDK_MOD1_MASK) ? -BIG_STEP : -SMALL_STEP;
|
||
break;
|
||
|
||
case GDK_KEY_Right:
|
||
case GDK_KEY_KP_Right:
|
||
dx = (state & GDK_MOD1_MASK) ? BIG_STEP : SMALL_STEP;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Now send a "motion" so that the modifier state is updated */
|
||
|
||
/* The state is not yet updated in the event, so we need
|
||
* to query it here. We could use XGetModifierMapping, but
|
||
* that would be overkill.
|
||
*/
|
||
root_window = gdk_screen_get_root_window (gtk_widget_get_screen (widget));
|
||
gdk_window_get_device_position (root_window, pointer, NULL, NULL, &state);
|
||
event->state = state;
|
||
|
||
if (dx != 0 || dy != 0)
|
||
{
|
||
info->cur_x += dx;
|
||
info->cur_y += dy;
|
||
gdk_device_warp (pointer,
|
||
gtk_widget_get_screen (widget),
|
||
info->cur_x, info->cur_y);
|
||
}
|
||
|
||
gtk_drag_update (info, info->cur_screen, info->cur_x, info->cur_y, (GdkEvent *)event);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_grab_broken_event_cb (GtkWidget *widget,
|
||
GdkEventGrabBroken *event,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
|
||
|
||
/* Don't cancel if we break the implicit grab from the initial button_press.
|
||
* Also, don't cancel if we re-grab on the widget or on our IPC window, for
|
||
* example, when changing the drag cursor.
|
||
*/
|
||
if (event->implicit
|
||
|| event->grab_window == gtk_widget_get_window (info->widget)
|
||
|| event->grab_window == gtk_widget_get_window (info->ipc_widget))
|
||
return FALSE;
|
||
|
||
gtk_drag_cancel (info, GTK_DRAG_RESULT_GRAB_BROKEN, gtk_get_current_event_time ());
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
gtk_drag_grab_notify_cb (GtkWidget *widget,
|
||
gboolean was_grabbed,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
|
||
GdkDevice *pointer;
|
||
|
||
pointer = gdk_drag_context_get_device (info->context);
|
||
|
||
if (gtk_widget_device_is_shadowed (widget, pointer))
|
||
{
|
||
/* We have to block callbacks to avoid recursion here, because
|
||
gtk_drag_cancel calls gtk_grab_remove (via gtk_drag_end) */
|
||
g_signal_handlers_block_by_func (widget, gtk_drag_grab_notify_cb, data);
|
||
gtk_drag_cancel (info, GTK_DRAG_RESULT_GRAB_BROKEN, gtk_get_current_event_time ());
|
||
g_signal_handlers_unblock_by_func (widget, gtk_drag_grab_notify_cb, data);
|
||
}
|
||
}
|
||
|
||
|
||
/*************************************************************
|
||
* gtk_drag_button_release_cb:
|
||
* “button-release-event” callback during drag.
|
||
* arguments:
|
||
*
|
||
* results:
|
||
*************************************************************/
|
||
|
||
static gboolean
|
||
gtk_drag_button_release_cb (GtkWidget *widget,
|
||
GdkEventButton *event,
|
||
gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
|
||
|
||
if (event->button != info->button)
|
||
return FALSE;
|
||
|
||
if ((gdk_drag_context_get_selected_action (info->context) != 0) &&
|
||
(gdk_drag_context_get_dest_window (info->context) != NULL))
|
||
{
|
||
gtk_drag_end (info, event->time);
|
||
gtk_drag_drop (info, event->time);
|
||
}
|
||
else
|
||
{
|
||
gtk_drag_cancel (info, GTK_DRAG_RESULT_NO_TARGET, event->time);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_drag_abort_timeout (gpointer data)
|
||
{
|
||
GtkDragSourceInfo *info = data;
|
||
guint32 time = GDK_CURRENT_TIME;
|
||
|
||
if (info->proxy_dest)
|
||
time = info->proxy_dest->proxy_drop_time;
|
||
|
||
info->drop_timeout = 0;
|
||
gtk_drag_drop_finished (info, GTK_DRAG_RESULT_TIMEOUT_EXPIRED, time);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/**
|
||
* gtk_drag_check_threshold: (method)
|
||
* @widget: a #GtkWidget
|
||
* @start_x: X coordinate of start of drag
|
||
* @start_y: Y coordinate of start of drag
|
||
* @current_x: current X coordinate
|
||
* @current_y: current Y coordinate
|
||
*
|
||
* Checks to see if a mouse drag starting at (@start_x, @start_y) and ending
|
||
* at (@current_x, @current_y) has passed the GTK+ drag threshold, and thus
|
||
* should trigger the beginning of a drag-and-drop operation.
|
||
*
|
||
* Returns: %TRUE if the drag threshold has been passed.
|
||
**/
|
||
gboolean
|
||
gtk_drag_check_threshold (GtkWidget *widget,
|
||
gint start_x,
|
||
gint start_y,
|
||
gint current_x,
|
||
gint current_y)
|
||
{
|
||
gint drag_threshold;
|
||
|
||
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
|
||
|
||
g_object_get (gtk_widget_get_settings (widget),
|
||
"gtk-dnd-drag-threshold", &drag_threshold,
|
||
NULL);
|
||
|
||
return (ABS (current_x - start_x) > drag_threshold ||
|
||
ABS (current_y - start_y) > drag_threshold);
|
||
}
|