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gtk2/gtk/gtkdnd.c
Elliot Lee 060978e069 I submitted this patch twice to gtk-devel-list, and received no comments, 
I submitted this patch twice to gtk-devel-list, and received no comments, so
am committing it.  Although not exhaustively tested, I have been using this
gtk+ for a week w/o problems, and I did read the code to ensure that nothing
ever writes to these data structures. If by chance people encounter SEGV's in
gtk+ code that is setting values in global data structures, this patch could
be a possible culprit.

1998-11-30  Elliot Lee  <sopwith@cuc.ml.org>

	* {gdk,gtk}/*.c: Make read-only data structures "static const" to
	allow them to be shared, mainly including (but not limited to) the
	GtkTypeInfo structures for each class.

	* gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
1998-11-30 19:07:15 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "gdk/gdkx.h"
#include "gtkdnd.h"
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtksignal.h"
#include "gtkdrawwindow.h"
static GSList *drag_widgets = NULL;
static GSList *source_widgets = NULL;
typedef struct _GtkDragSourceSite GtkDragSourceSite;
typedef struct _GtkDragSourceInfo GtkDragSourceInfo;
typedef struct _GtkDragDestSite GtkDragDestSite;
typedef struct _GtkDragDestInfo GtkDragDestInfo;
typedef struct _GtkDragAnim GtkDragAnim;
typedef struct _GtkDragFindData GtkDragFindData;
typedef enum {
GTK_DRAG_STATUS_DRAG,
GTK_DRAG_STATUS_WAIT,
GTK_DRAG_STATUS_DROP
} GtkDragStatus;
struct _GtkDragSourceSite {
GdkModifierType start_button_mask;
GtkTargetList *target_list; /* Targets for drag data */
GdkDragAction actions; /* Possible actions */
GdkColormap *colormap; /* Colormap for drag icon */
GdkPixmap *pixmap; /* Icon for drag data */
GdkBitmap *mask;
/* Stored button press information to detect drag beginning */
gint state;
gint x, y;
};
struct _GtkDragSourceInfo {
GtkWidget *widget;
GtkTargetList *target_list; /* Targets for drag data */
GdkDragContext *context; /* drag context */
GtkWidget *icon_window; /* Window for drag */
GtkWidget *ipc_widget; /* GtkInvisible for grab, message passing */
GdkCursor *cursor; /* Cursor for drag */
gint hot_x, hot_y; /* Hot spot for drag */
gint button; /* mouse button starting drag */
GtkDragStatus status; /* drag status */
GdkEvent *last_event; /* motion event waiting for response */
gint start_x, start_y; /* Initial position */
gint cur_x, cur_y; /* Current Position */
GList *selections; /* selections we've claimed */
GtkDragDestInfo *proxy_dest; /* Set if this is a proxy drag */
guint drop_timeout; /* Timeout for aborting drop */
};
struct _GtkDragDestSite {
GtkDestDefaults flags;
GtkTargetList *target_list;
GdkDragAction actions;
GdkWindow *proxy_window;
GdkDragProtocol proxy_protocol;
gboolean do_proxy : 1;
gboolean proxy_coords : 1;
gboolean have_drag : 1;
};
struct _GtkDragDestInfo {
GtkWidget *widget; /* Widget in which drag is in */
GdkDragContext *context; /* Drag context */
GtkDragSourceInfo *proxy_source; /* Set if this is a proxy drag */
GtkSelectionData *proxy_data; /* Set while retrieving proxied data */
gboolean dropped : 1; /* Set after we receive a drop */
guint32 proxy_drop_time; /* Timestamp for proxied drop */
gboolean proxy_drop_wait : 1; /* Set if we are waiting for a
* status reply before sending
* a proxied drop on.
*/
gint drop_x, drop_y; /* Position of drop */
};
#define DROP_ABORT_TIME 10000
#define ANIM_STEP_TIME 50
#define ANIM_STEP_LENGTH 50
#define ANIM_MIN_STEPS 5
#define ANIM_MAX_STEPS 10
struct _GtkDragAnim {
GtkDragSourceInfo *info;
gint step;
gint n_steps;
};
struct _GtkDragFindData {
gint x;
gint y;
GdkDragContext *context;
GtkDragDestInfo *info;
gboolean found;
gboolean toplevel;
gboolean (*callback) (GtkWidget *widget, GdkDragContext *context,
gint x, gint y, guint32 time);
guint32 time;
};
/* Enumeration for some targets we handle internally */
enum {
TARGET_MOTIF_SUCCESS = 0x40000000,
TARGET_MOTIF_FAILURE,
TARGET_DELETE
};
/* Drag icons */
static GdkPixmap *default_icon_pixmap = NULL;
static GdkPixmap *default_icon_mask = NULL;
static GdkColormap *default_icon_colormap = NULL;
static gint default_icon_hot_x;
static gint default_icon_hot_y;
/* Forward declarations */
static GdkDragAction gtk_drag_get_event_action (GdkEvent *event,
gint button,
GdkDragAction actions);
static GdkCursor * gtk_drag_get_cursor (GdkDragAction action);
static GtkWidget *gtk_drag_get_ipc_widget (void);
static void gtk_drag_release_ipc_widget (GtkWidget *widget);
static GdkAtom gtk_drag_dest_find_target (GtkWidget *widget,
GtkDragDestSite *site,
GdkDragContext *context);
static void gtk_drag_selection_received (GtkWidget *widget,
GtkSelectionData *selection_data,
guint32 time,
gpointer data);
static void gtk_drag_find_widget (GtkWidget *widget,
GtkDragFindData *data);
static void gtk_drag_proxy_begin (GtkWidget *widget,
GtkDragDestInfo *dest_info);
static void gtk_drag_dest_info_destroy (gpointer data);
static void gtk_drag_dest_realized (GtkWidget *widget);
static void gtk_drag_dest_site_destroy (gpointer data);
static void gtk_drag_dest_leave (GtkWidget *widget,
GdkDragContext *context,
guint time);
static gboolean gtk_drag_dest_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean gtk_drag_dest_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void gtk_drag_source_check_selection (GtkDragSourceInfo *info,
GdkAtom selection,
guint32 time);
static void gtk_drag_source_release_selections (GtkDragSourceInfo *info,
guint32 time);
static void gtk_drag_drop (GtkDragSourceInfo *info,
guint32 time);
static void gtk_drag_drop_finished (GtkDragSourceInfo *info,
gboolean success,
guint time);
static gint gtk_drag_source_event_cb (GtkWidget *widget,
GdkEvent *event,
gpointer data);
static void gtk_drag_source_site_destroy (gpointer data);
static void gtk_drag_selection_get (GtkWidget *widget,
GtkSelectionData *selection_data,
guint sel_info,
guint32 time,
gpointer data);
static gint gtk_drag_anim_timeout (gpointer data);
static void gtk_drag_remove_icon (GtkDragSourceInfo *info);
static void gtk_drag_source_info_destroy (gpointer data);
static gint gtk_drag_motion_cb (GtkWidget *widget,
GdkEventMotion *event,
gpointer data);
static gint gtk_drag_button_release_cb (GtkWidget *widget,
GdkEventButton *event,
gpointer data);
static gint gtk_drag_abort_timeout (gpointer data);
/************************
* Cursor and Icon data *
************************/
#define action_ask_width 16
#define action_ask_height 16
static const char action_ask_bits[] = {
0x00, 0x00, 0xfe, 0x7f, 0xfe, 0x1f, 0x06, 0xc0, 0x76, 0xf8, 0xb6, 0xf7,
0xd6, 0xec, 0x66, 0xdb, 0x66, 0xdb, 0x96, 0xec, 0x76, 0xf7, 0x76, 0xfb,
0xf6, 0xfc, 0x72, 0xfb, 0x7a, 0xfb, 0xf8, 0xfc, };
#define action_ask_mask_width 16
#define action_ask_mask_height 16
static const char action_ask_mask_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0x8f, 0x07, 0xcf, 0x0f,
0xef, 0x1f, 0xff, 0x3c, 0xff, 0x3c, 0x6f, 0x1f, 0x8f, 0x0f, 0x8f, 0x07,
0x0f, 0x03, 0x8f, 0x07, 0x87, 0x07, 0x07, 0x03, };
#define action_copy_width 16
#define action_copy_height 16
static const char action_copy_bits[] = {
0x00, 0x00, 0xfe, 0x7f, 0xfe, 0x1f, 0x06, 0xc0, 0x76, 0xfb, 0x76, 0xfb,
0x76, 0xfb, 0x06, 0x83, 0xf6, 0xbf, 0xf6, 0xbf, 0x06, 0x83, 0x76, 0xfb,
0x76, 0xfb, 0x72, 0xfb, 0x7a, 0xf8, 0xf8, 0xff, };
#define action_copy_mask_width 16
#define action_copy_mask_height 16
static const char action_copy_mask_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0x8f, 0x07, 0x8f, 0x07,
0x8f, 0x07, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0x7f, 0x8f, 0x07,
0x8f, 0x07, 0x8f, 0x07, 0x87, 0x07, 0x07, 0x00, };
#define action_move_width 16
#define action_move_height 16
static const char action_move_bits[] = {
0x00, 0x00, 0xfe, 0x7f, 0xfe, 0x1f, 0x06, 0xc0, 0x96, 0xff, 0x26, 0xff,
0xc6, 0xf8, 0xd6, 0xe3, 0x96, 0x8f, 0xb6, 0xbf, 0x36, 0xc3, 0x76, 0xfb,
0x76, 0xfa, 0xf2, 0xfa, 0xfa, 0xf8, 0xf8, 0xff, };
#define action_move_mask_width 16
#define action_move_mask_height 16
static const char action_move_mask_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0x6f, 0x00, 0xff, 0x00,
0xff, 0x07, 0xef, 0x1f, 0xef, 0x7f, 0xcf, 0x7f, 0xcf, 0x3f, 0x8f, 0x07,
0x8f, 0x07, 0x0f, 0x07, 0x07, 0x07, 0x07, 0x00, };
#define action_link_width 16
#define action_link_height 16
static const char action_link_bits[] = {
0x00, 0x00, 0xfe, 0x7f, 0xfe, 0x1f, 0x06, 0xc0, 0x36, 0xf8, 0xd6, 0xf7,
0x66, 0xec, 0xa6, 0xe8, 0x26, 0xdf, 0xe6, 0xbd, 0xd6, 0xa7, 0xb6, 0xa8,
0xb6, 0xb1, 0x72, 0xdf, 0xfa, 0xe0, 0xf8, 0xff, };
#define action_link_mask_width 16
#define action_link_mask_height 16
static const char action_link_mask_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xcf, 0x07, 0xef, 0x0f,
0xff, 0x1f, 0x7f, 0x1f, 0xff, 0x3f, 0xff, 0x7f, 0xef, 0x7f, 0xcf, 0x77,
0xcf, 0x7f, 0x8f, 0x3f, 0x07, 0x1f, 0x07, 0x00, };
#define action_none_width 16
#define action_none_height 16
static const char action_none_bits[] = {
0x00, 0x00, 0xfe, 0x7f, 0xfe, 0x1f, 0x06, 0xc0, 0xf6, 0xff, 0xf6, 0xff,
0xf6, 0xff, 0xf6, 0xff, 0xf6, 0xff, 0xf6, 0xff, 0xf6, 0xff, 0xf6, 0xff,
0xf6, 0xff, 0xf2, 0xff, 0xfa, 0xff, 0xf8, 0xff, };
#define action_none_mask_width 16
#define action_none_mask_height 16
static const char action_none_mask_bits[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0x0f, 0x00, 0x0f, 0x00,
0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00,
0x0f, 0x00, 0x0f, 0x00, 0x07, 0x00, 0x07, 0x00, };
#define CURSOR_WIDTH 16
#define CURSOR_HEIGHT 16
static struct {
GdkDragAction action;
const char *bits;
const char *mask;
GdkCursor *cursor;
} drag_cursors[] = {
{ GDK_ACTION_DEFAULT, 0 },
{ GDK_ACTION_ASK, action_ask_bits, action_ask_mask_bits, NULL },
{ GDK_ACTION_COPY, action_copy_bits, action_copy_mask_bits, NULL },
{ GDK_ACTION_MOVE, action_move_bits, action_move_mask_bits, NULL },
{ GDK_ACTION_LINK, action_link_bits, action_link_mask_bits, NULL },
{ 0 , action_none_bits, action_none_mask_bits, NULL },
};
static const gint n_drag_cursors = sizeof(drag_cursors) / sizeof(drag_cursors[0]);
/* XPM */
static const char * drag_default_xpm[] = {
"32 32 3 1",
" c None",
". c #000000",
"+ c #FFFFFF",
" ",
" ",
" .. ",
" ..+. ",
" ..++.. ",
" ...++++. ",
" ...++++++.. ",
" ...+++++++++. ",
" ...+++++++++++.. ",
" ..+.++++++++++++.. ",
" .++.++++++++++++.. ",
" .+++.++++++++++++.. ",
" .++++.++++++++++++. ",
" .+++.+++++++++++++.. ",
" .++.+++++++++++++++.. ",
" .+.+++++++++++++++++.. ",
" ..+++++++++++++++++++.. ",
" ..++++++++++++++++++++. ",
" .++++++++++++++++++++.. ",
" ..+++++++++++++++++.. ",
" .++++++++++++++++.. ",
" ..+++++++++++++... ",
" .++++++++++++.. ",
" ..+++++++++.. ",
" .++++++++.. ",
" ..++++++.. ",
" .+++++.. ",
" .++.. ",
" ... ",
" .. ",
" ",
" "};
/*********************
* Utility functions *
*********************/
/*************************************************************
* gtk_drag_get_ipc_widget:
* Return a invisible, off-screen, override-redirect
* widget for IPC.
* arguments:
*
* results:
*************************************************************/
static GtkWidget *
gtk_drag_get_ipc_widget(void)
{
GtkWidget *result;
if (drag_widgets)
{
GSList *tmp = drag_widgets;
result = drag_widgets->data;
drag_widgets = drag_widgets->next;
g_slist_free_1 (tmp);
}
else
{
result = gtk_invisible_new();
gtk_widget_show (result);
}
return result;
}
/*************************************************************
* 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)
{
drag_widgets = g_slist_prepend (drag_widgets, widget);
}
static GdkDragAction
gtk_drag_get_event_action (GdkEvent *event, gint button, GdkDragAction actions)
{
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 == 3)
return GDK_ACTION_ASK;
if (state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))
{
if ((state & GDK_SHIFT_MASK) && (state & GDK_CONTROL_MASK))
return (actions & GDK_ACTION_LINK) ? GDK_ACTION_LINK : 0;
else if (state & GDK_CONTROL_MASK)
return (actions & GDK_ACTION_COPY) ? GDK_ACTION_COPY : 0;
else
return (actions & GDK_ACTION_MOVE) ? GDK_ACTION_MOVE : 0;
}
else
{
if (actions & GDK_ACTION_COPY)
return GDK_ACTION_COPY;
else if (actions & GDK_ACTION_MOVE)
return GDK_ACTION_MOVE;
else if (actions & GDK_ACTION_LINK)
return GDK_ACTION_LINK;
}
}
return 0;
}
static GdkCursor *
gtk_drag_get_cursor (GdkDragAction action)
{
gint i;
for (i = 0 ; i < n_drag_cursors - 1; i++)
if (drag_cursors[i].action == action)
break;
if (drag_cursors[i].cursor == NULL)
{
GdkColor fg, bg;
GdkPixmap *pixmap =
gdk_bitmap_create_from_data (NULL,
drag_cursors[i].bits,
CURSOR_WIDTH, CURSOR_HEIGHT);
GdkPixmap *mask =
gdk_bitmap_create_from_data (NULL,
drag_cursors[i].mask,
CURSOR_WIDTH, CURSOR_HEIGHT);
gdk_color_white (gdk_colormap_get_system(), &bg);
gdk_color_black (gdk_colormap_get_system(), &fg);
drag_cursors[i].cursor = gdk_cursor_new_from_pixmap (pixmap, mask, &fg, &bg, 0, 0);
gdk_pixmap_unref (pixmap);
gdk_pixmap_unref (mask);
}
return drag_cursors[i].cursor;
}
/********************
* Destination side *
********************/
/*************************************************************
* gtk_drag_get_data:
* Get the data for a drag or drop
* arguments:
* context - drag context
* target - format to retrieve the data in.
* time - timestamp of triggering event.
*
* results:
*************************************************************/
void
gtk_drag_get_data (GtkWidget *widget,
GdkDragContext *context,
GdkAtom target,
guint32 time)
{
GtkWidget *selection_widget;
g_return_if_fail (widget != NULL);
g_return_if_fail (context != NULL);
selection_widget = gtk_drag_get_ipc_widget();
gdk_drag_context_ref (context);
gtk_widget_ref (widget);
gtk_signal_connect (GTK_OBJECT (selection_widget), "selection_received",
GTK_SIGNAL_FUNC (gtk_drag_selection_received), widget);
gtk_object_set_data (GTK_OBJECT (selection_widget), "drag-context", context);
gtk_selection_convert (selection_widget,
gdk_drag_get_selection(context),
target,
time);
}
/*************************************************************
* gtk_drag_get_source_widget:
* Get the widget the was the source of this drag, if
* the drag originated from this application.
* arguments:
* context: The drag context for this drag
* results:
* The source widget, or NULL if the drag originated from
* a different application.
*************************************************************/
GtkWidget *
gtk_drag_get_source_widget (GdkDragContext *context)
{
GSList *tmp_list;
tmp_list = source_widgets;
while (tmp_list)
{
GtkWidget *ipc_widget = tmp_list->data;
if (ipc_widget->window == context->source_window)
{
GtkDragSourceInfo *info;
info = gtk_object_get_data (GTK_OBJECT (ipc_widget), "gtk-info");
return info ? info->widget : NULL;
}
tmp_list = tmp_list->next;
}
return NULL;
}
/*************************************************************
* gtk_drag_finish:
* Notify the drag source that the transfer of data
* is complete.
* arguments:
* context: The drag context for this drag
* success: Was the data successfully transferred?
* time: The timestamp to use when notifying the destination.
* results:
*************************************************************/
void
gtk_drag_finish (GdkDragContext *context,
gboolean success,
gboolean del,
guint32 time)
{
GdkAtom target = GDK_NONE;
g_return_if_fail (context != NULL);
if (success && del)
{
target = gdk_atom_intern ("DELETE", FALSE);
}
else if (context->protocol == GDK_DRAG_PROTO_MOTIF)
{
target = gdk_atom_intern (success ?
"XmTRANSFER_SUCCESS" :
"XmTRANSFER_FAILURE",
FALSE);
}
if (target != GDK_NONE)
{
GtkWidget *selection_widget = gtk_drag_get_ipc_widget();
gdk_drag_context_ref (context);
gtk_object_set_data (GTK_OBJECT (selection_widget), "drag-context", context);
gtk_signal_connect (GTK_OBJECT (selection_widget), "selection_received",
GTK_SIGNAL_FUNC (gtk_drag_selection_received),
NULL);
gtk_selection_convert (selection_widget,
gdk_drag_get_selection(context),
target,
time);
}
if (!del)
gdk_drop_finish (context, success, time);
}
/*************************************************************
* gtk_drag_highlight:
* Highlight the given widget in the default manner.
* arguments:
* widget:
* results:
*************************************************************/
void
gtk_drag_highlight (GtkWidget *widget)
{
gint x, y;
g_return_if_fail (widget != NULL);
if (GTK_WIDGET_NO_WINDOW (widget))
{
x = widget->allocation.x;
y = widget->allocation.y;
}
else
{
x = 0;
y = 0;
}
gtk_draw_shadow (widget->style, widget->window,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
x, y,
widget->allocation.width,
widget->allocation.height);
gdk_draw_rectangle (widget->window,
widget->style->black_gc,
FALSE,
x, y,
widget->allocation.width - 1,
widget->allocation.height - 1);
}
/*************************************************************
* gtk_drag_unhighlight:
* Refresh the given widget to remove the highlight.
* arguments:
* widget:
* results:
*************************************************************/
void
gtk_drag_unhighlight (GtkWidget *widget)
{
gint x, y;
g_return_if_fail (widget != NULL);
if (GTK_WIDGET_NO_WINDOW (widget))
{
x = widget->allocation.x;
y = widget->allocation.y;
}
else
{
x = 0;
y = 0;
}
gdk_window_clear_area_e (widget->window,
x, y,
widget->allocation.width,
widget->allocation.height);
}
/*************************************************************
* gtk_drag_dest_set:
* Register a drop site, and possibly add default behaviors.
* arguments:
* widget:
* flags: Which types of default drag behavior to use
* targets: Table of targets that can be accepted
* n_targets: Number of of entries in targets
* actions:
* results:
*************************************************************/
void
gtk_drag_dest_set (GtkWidget *widget,
GtkDestDefaults flags,
GtkTargetEntry *targets,
gint n_targets,
GdkDragAction actions)
{
GtkDragDestSite *site;
g_return_if_fail (widget != NULL);
/* HACK, do this in the destroy */
site = gtk_object_get_data (GTK_OBJECT (widget), "gtk-drag-dest");
if (site)
gtk_signal_disconnect_by_data (GTK_OBJECT (widget), site);
if (GTK_WIDGET_REALIZED (widget))
gtk_drag_dest_realized (widget);
gtk_signal_connect (GTK_OBJECT (widget), "realize",
GTK_SIGNAL_FUNC (gtk_drag_dest_realized), NULL);
site = g_new (GtkDragDestSite, 1);
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;
gtk_object_set_data_full (GTK_OBJECT (widget), "gtk-drag-dest",
site, gtk_drag_dest_site_destroy);
}
/*************************************************************
* gtk_drag_dest_set_proxy:
* Set up this widget to proxy drags elsewhere.
* arguments:
* widget:
* proxy_window: window to which forward drag events
* protocol: Drag protocol which the dest widget accepts
* use_coordinates: If true, send the same coordinates to the
* destination, because it is a embedded
* subwindow.
* results:
*************************************************************/
void
gtk_drag_dest_set_proxy (GtkWidget *widget,
GdkWindow *proxy_window,
GdkDragProtocol protocol,
gboolean use_coordinates)
{
GtkDragDestSite *site;
g_return_if_fail (widget != NULL);
/* HACK, do this in the destroy */
site = gtk_object_get_data (GTK_OBJECT (widget), "gtk-drag-dest");
if (site)
gtk_signal_disconnect_by_data (GTK_OBJECT (widget), site);
if (GTK_WIDGET_REALIZED (widget))
gtk_drag_dest_realized (widget);
gtk_signal_connect (GTK_OBJECT (widget), "realize",
GTK_SIGNAL_FUNC (gtk_drag_dest_realized), NULL);
site = g_new (GtkDragDestSite, 1);
site->flags = 0;
site->have_drag = FALSE;
site->target_list = NULL;
site->actions = 0;
site->proxy_window = proxy_window;
if (proxy_window)
gdk_window_ref (proxy_window);
site->do_proxy = TRUE;
site->proxy_protocol = protocol;
site->proxy_coords = use_coordinates;
gtk_object_set_data_full (GTK_OBJECT (widget), "gtk-drag-dest",
site, gtk_drag_dest_site_destroy);
}
/*************************************************************
* gtk_drag_dest_unset
* Unregister this widget as a drag target.
* arguments:
* widget:
* results:
*************************************************************/
void
gtk_drag_dest_unset (GtkWidget *widget)
{
g_return_if_fail (widget != NULL);
gtk_object_set_data (GTK_OBJECT (widget), "gtk-drag-dest", NULL);
}
/*************************************************************
* 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 = g_dataset_get_data (context, "gtk-info");
if (!info)
{
info = g_new (GtkDragDestInfo, 1);
info->widget = NULL;
info->context = event->dnd.context;
info->proxy_source = NULL;
info->proxy_data = NULL;
info->dropped = FALSE;
info->proxy_drop_wait = FALSE;
g_dataset_set_data_full (context,
"gtk-info",
info,
gtk_drag_dest_info_destroy);
}
/* 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:
{
GtkDragFindData data;
gint tx, ty;
if (event->type == GDK_DROP_START)
info->dropped = TRUE;
gdk_window_get_position (toplevel->window, &tx, &ty);
data.x = event->dnd.x_root - tx;
data.y = event->dnd.y_root - ty;
data.context = context;
data.info = info;
data.found = FALSE;
data.toplevel = TRUE;
data.callback = (event->type == GDK_DRAG_MOTION) ?
gtk_drag_dest_motion : gtk_drag_dest_drop;
data.time = event->dnd.time;
gtk_drag_find_widget (toplevel, &data);
/* We send a leave here so that the widget unhighlights
* properly
*/
if (info->widget &&
((event->type == GDK_DROP_START) || (!data.found)))
{
gtk_drag_dest_leave (info->widget, context, event->dnd.time);
info->widget = NULL;
}
/* Send a reply.
*/
if (event->type == GDK_DRAG_MOTION)
{
if (!data.found)
gdk_drag_status (context, 0, event->dnd.time);
}
else if (event->type == GDK_DROP_START)
gdk_drop_reply (context, data.found, event->dnd.time);
}
break;
default:
g_assert_not_reached();
}
}
/*************************************************************
* gtk_drag_dest_find_target:
* Decide on a target for the drag.
* arguments:
* site:
* context:
* results:
*************************************************************/
static GdkAtom
gtk_drag_dest_find_target (GtkWidget *widget,
GtkDragDestSite *site,
GdkDragContext *context)
{
GList *tmp_target;
GList *tmp_source = NULL;
GtkWidget *source_widget = gtk_drag_get_source_widget (context);
tmp_target = site->target_list->list;
while (tmp_target)
{
GtkTargetPair *pair = tmp_target->data;
tmp_source = context->targets;
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)))
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,
guint32 time,
gpointer data)
{
GdkDragContext *context;
GtkDragDestInfo *info;
GtkWidget *drop_widget;
drop_widget = data;
context = gtk_object_get_data (GTK_OBJECT (widget), "drag-context");
info = g_dataset_get_data (context, "gtk-info");
if (info->proxy_data &&
info->proxy_data->target == selection_data->target)
{
gtk_selection_data_set (info->proxy_data,
selection_data->type,
selection_data->format,
selection_data->data,
selection_data->length);
gtk_main_quit();
return;
}
if (selection_data->target == gdk_atom_intern ("DELETE", FALSE))
{
gtk_drag_finish (context, TRUE, FALSE, time);
}
else if ((selection_data->target == gdk_atom_intern ("XmTRANSFER_SUCCESS", FALSE)) ||
(selection_data->target == gdk_atom_intern ("XmTRANSFER_FAILURE", FALSE)))
{
/* Do nothing */
}
else
{
GtkDragDestSite *site;
site = gtk_object_get_data (GTK_OBJECT (drop_widget), "gtk-drag-dest");
if (site->target_list)
{
guint target_info;
if (gtk_target_list_find (site->target_list,
selection_data->target,
&target_info))
{
if (!(site->flags & GTK_DEST_DEFAULT_DROP) ||
selection_data->length >= 0)
gtk_signal_emit_by_name (GTK_OBJECT (drop_widget),
"drag_data_received",
context, info->drop_x, info->drop_y,
selection_data,
target_info, time);
}
}
else
{
gtk_signal_emit_by_name (GTK_OBJECT (drop_widget),
"drag_data_received",
context, info->drop_x, info->drop_y,
selection_data, 0, time);
}
if (site->flags & GTK_DEST_DEFAULT_DROP)
{
gtk_drag_finish (context,
(selection_data->length >= 0),
(context->action == GDK_ACTION_MOVE),
time);
}
gtk_widget_unref (drop_widget);
}
gtk_signal_disconnect_by_func (GTK_OBJECT (widget),
GTK_SIGNAL_FUNC (gtk_drag_selection_received),
data);
gtk_object_set_data (GTK_OBJECT (widget), "drag-context", NULL);
gdk_drag_context_unref (context);
gtk_drag_release_ipc_widget (widget);
}
/*************************************************************
* gtk_drag_find_widget:
* Recursive callback used to locate widgets for
* DRAG_MOTION and DROP_START events.
* arguments:
*
* results:
*************************************************************/
static void
gtk_drag_find_widget (GtkWidget *widget,
GtkDragFindData *data)
{
GtkAllocation new_allocation;
gint x_offset = 0;
gint y_offset = 0;
new_allocation = widget->allocation;
if (!GTK_WIDGET_VISIBLE (widget))
return;
if (!GTK_WIDGET_NO_WINDOW (widget))
{
new_allocation.x = 0;
new_allocation.y = 0;
}
if (widget->parent)
{
GdkWindow *window = widget->window;
while (window != widget->parent->window)
{
gint tx, ty, twidth, theight;
gdk_window_get_size (window, &twidth, &theight);
if (new_allocation.x < 0)
{
new_allocation.width += new_allocation.x;
new_allocation.x = 0;
}
if (new_allocation.y < 0)
{
new_allocation.height += new_allocation.y;
new_allocation.y = 0;
}
if (new_allocation.x + new_allocation.width > twidth)
new_allocation.width = twidth - new_allocation.x;
if (new_allocation.y + new_allocation.height > theight)
new_allocation.height = theight - new_allocation.y;
gdk_window_get_position (window, &tx, &ty);
new_allocation.x += tx;
x_offset += tx;
new_allocation.y += ty;
y_offset += ty;
window = gdk_window_get_parent (window);
}
}
if (data->toplevel ||
((data->x >= new_allocation.x) && (data->y >= new_allocation.y) &&
(data->x < new_allocation.x + new_allocation.width) &&
(data->y < new_allocation.y + new_allocation.height)))
{
/* First, check if the drag is in a valid drop site in
* one of our children
*/
if (GTK_IS_CONTAINER (widget))
{
GtkDragFindData new_data = *data;
new_data.x -= x_offset;
new_data.y -= y_offset;
new_data.found = FALSE;
new_data.toplevel = FALSE;
gtk_container_foreach (GTK_CONTAINER (widget),
(GtkCallback)gtk_drag_find_widget,
&new_data);
data->found = new_data.found;
}
/* If not, and this widget is registered as a drop site, check to
* emit "drag_motion" to check if we are actually in
* a drop site.
*/
if (!data->found &&
gtk_object_get_data (GTK_OBJECT (widget), "gtk-drag-dest"))
{
data->found = data->callback (widget,
data->context,
data->x - new_allocation.x,
data->y - new_allocation.y,
data->time);
/* If so, send a "drag_leave" to the last widget */
if (data->found)
{
if (data->info->widget && data->info->widget != widget)
{
gtk_drag_dest_leave (data->info->widget, data->context, data->time);
}
data->info->widget = widget;
}
}
}
}
static void
gtk_drag_proxy_begin (GtkWidget *widget, GtkDragDestInfo *dest_info)
{
GtkDragSourceInfo *source_info;
GList *tmp_list;
source_info = g_new0 (GtkDragSourceInfo, 1);
source_info->ipc_widget = gtk_drag_get_ipc_widget ();
source_info->widget = widget;
gtk_widget_ref (source_info->widget);
source_info->context = gdk_drag_begin (source_info->ipc_widget->window,
dest_info->context->targets,
dest_info->context->actions);
source_info->target_list = gtk_target_list_new (NULL, 0);
tmp_list = dest_info->context->targets;
while (tmp_list)
{
gtk_target_list_add (source_info->target_list,
GPOINTER_TO_UINT (tmp_list->data), 0, 0);
tmp_list = tmp_list->next;
}
source_info->proxy_dest = dest_info;
g_dataset_set_data (source_info->context, "gtk-info", source_info);
gtk_signal_connect (GTK_OBJECT (source_info->ipc_widget),
"selection_get",
GTK_SIGNAL_FUNC (gtk_drag_selection_get),
source_info);
dest_info->proxy_source = source_info;
}
static void
gtk_drag_dest_info_destroy (gpointer data)
{
GtkDragDestInfo *info = data;
g_free (info);
}
static void
gtk_drag_dest_realized (GtkWidget *widget)
{
GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
gdk_window_register_dnd (toplevel->window);
}
static void
gtk_drag_dest_site_destroy (gpointer data)
{
GtkDragDestSite *site = data;
if (site->target_list)
gtk_target_list_unref (site->target_list);
g_free (site);
}
/*
* Default drag handlers
*/
static void
gtk_drag_dest_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
GtkDragDestSite *site;
site = gtk_object_get_data (GTK_OBJECT (widget), "gtk-drag-dest");
g_return_if_fail (site != NULL);
if (site->do_proxy)
{
GtkDragDestInfo *info = g_dataset_get_data (context, "gtk-info");
if (info->proxy_source && !info->dropped)
gdk_drag_abort (info->proxy_source->context, time);
return;
}
else
{
if (site->flags & GTK_DEST_DEFAULT_HIGHLIGHT)
gtk_drag_unhighlight (widget);
if (!(site->flags & GTK_DEST_DEFAULT_MOTION) || site->have_drag)
gtk_signal_emit_by_name (GTK_OBJECT (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 = gtk_object_get_data (GTK_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 = g_dataset_get_data (context, "gtk-info");
if (!info->proxy_source)
gtk_drag_proxy_begin (widget, info);
current_event = gtk_get_current_event ();
if (site->proxy_window)
{
dest_window = site->proxy_window;
proto = site->proxy_protocol;
}
else
{
gdk_drag_find_window (info->proxy_source->context,
NULL,
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,
context->suggested_action, time);
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->flags & GTK_DEST_DEFAULT_MOTION)
{
if (context->suggested_action & site->actions)
action = context->suggested_action;
else
{
gint i;
for (i=0; i<8; i++)
{
if ((site->actions & (1 << i)) &&
(context->actions & (1 << i)))
{
action = (1 << i);
break;
}
}
}
if (action && gtk_drag_dest_find_target (widget, site, context))
{
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);
return TRUE;
}
}
gtk_signal_emit_by_name (GTK_OBJECT (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 = gtk_object_get_data (GTK_OBJECT (widget), "gtk-drag-dest");
g_return_val_if_fail (site != NULL, FALSE);
info = g_dataset_get_data (context, "gtk-info");
g_return_val_if_fail (info != NULL, FALSE);
info->drop_x = x;
info->drop_y = y;
if (site->do_proxy)
{
if (info->proxy_source ||
(info->context->protocol == 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 one a good one, do a drop.
*/
GdkEvent *current_event;
GdkAtom selection;
GdkWindow *dest_window;
GdkDragProtocol proto;
gtk_drag_proxy_begin (widget, info);
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 (info->proxy_source->context,
NULL,
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,
context->suggested_action, time);
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_MOTION)
{
GdkAtom target = gtk_drag_dest_find_target (widget, site, context);
if (target == GDK_NONE)
return FALSE;
gtk_drag_get_data (widget, context, target, time);
}
gtk_signal_emit_by_name (GTK_OBJECT (widget), "drag_drop",
context, x, y, time, &retval);
return (site->flags & GTK_DEST_DEFAULT_MOTION) ? TRUE : retval;
}
}
/***************
* Source side *
***************/
/*************************************************************
* gtk_drag_begin: Start a drag operation
*
* arguments:
* widget: Widget from which drag starts
* handlers: List of handlers to supply the data for the drag
* button: Button user used to start drag
* time: Time of event starting drag
*
* results:
*************************************************************/
GdkDragContext *
gtk_drag_begin (GtkWidget *widget,
GtkTargetList *target_list,
GdkDragAction actions,
gint button,
GdkEvent *event)
{
GtkDragSourceInfo *info;
GList *targets = NULL;
GList *tmp_list;
guint32 time = GDK_CURRENT_TIME;
g_return_val_if_fail (widget != NULL, NULL);
g_return_val_if_fail (GTK_WIDGET_REALIZED (widget), NULL);
g_return_val_if_fail (target_list != NULL, NULL);
if (event)
time = gdk_event_get_time (event);
info = g_new0 (GtkDragSourceInfo, 1);
info->ipc_widget = gtk_drag_get_ipc_widget ();
source_widgets = g_slist_prepend (source_widgets, info->ipc_widget);
gtk_object_set_data (GTK_OBJECT (info->ipc_widget), "gtk-info", info);
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;
}
info->widget = widget;
gtk_widget_ref (info->widget);
info->context = gdk_drag_begin (info->ipc_widget->window,
targets, actions);
g_list_free (targets);
g_dataset_set_data (info->context, "gtk-info", info);
info->button = button;
info->target_list = target_list;
gtk_target_list_ref (target_list);
info->cursor = NULL;
info->status = GTK_DRAG_STATUS_DRAG;
info->last_event = NULL;
info->selections = NULL;
info->icon_window = NULL;
if (event)
info->cursor = gtk_drag_get_cursor (
gtk_drag_get_event_action (event, info->button, actions));
gtk_signal_emit_by_name (GTK_OBJECT (widget), "drag_begin",
info->context);
/* We use a GTK grab here to override any grabs that the widget
* we are dragging from might have held
*/
gtk_grab_add (info->ipc_widget);
gdk_pointer_grab (info->ipc_widget->window, FALSE,
GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_RELEASE_MASK, NULL,
info->cursor, time);
if (event->type == GDK_MOTION_NOTIFY)
gtk_drag_motion_cb (info->ipc_widget, (GdkEventMotion *)event, info);
else
{
gint x, y;
gdk_window_get_pointer (GDK_ROOT_PARENT(), &x, &y, NULL);
info->cur_x = x;
info->cur_y = y;
if (info->icon_window)
{
gdk_window_raise (info->icon_window->window);
gtk_widget_set_uposition (info->icon_window, x - info->hot_x, y - info->hot_y);
}
}
info->start_x = info->cur_x;
info->start_y = info->cur_y;
gtk_signal_connect (GTK_OBJECT (info->ipc_widget), "button_release_event",
GTK_SIGNAL_FUNC (gtk_drag_button_release_cb), info);
gtk_signal_connect (GTK_OBJECT (info->ipc_widget), "motion_notify_event",
GTK_SIGNAL_FUNC (gtk_drag_motion_cb), info);
gtk_signal_connect (GTK_OBJECT (info->ipc_widget), "selection_get",
GTK_SIGNAL_FUNC (gtk_drag_selection_get), info);
return info->context;
}
/*************************************************************
* gtk_drag_source_set:
* Register a drop site, and possibly add default behaviors.
* arguments:
* widget:
* start_button_mask: Mask of allowed buttons to start drag
* targets: Table of targets for this source
* n_targets:
* actions: Actions allowed for this source
* results:
*************************************************************/
void
gtk_drag_source_set (GtkWidget *widget,
GdkModifierType start_button_mask,
GtkTargetEntry *targets,
gint n_targets,
GdkDragAction actions)
{
GtkDragSourceSite *site;
g_return_if_fail (widget != NULL);
site = gtk_object_get_data (GTK_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_new0 (GtkDragSourceSite, 1);
gtk_signal_connect (GTK_OBJECT (widget), "button_press_event",
GTK_SIGNAL_FUNC (gtk_drag_source_event_cb),
site);
gtk_signal_connect (GTK_OBJECT (widget), "motion_notify_event",
GTK_SIGNAL_FUNC (gtk_drag_source_event_cb),
site);
gtk_object_set_data_full (GTK_OBJECT (widget),
"gtk-site-data",
site, gtk_drag_source_site_destroy);
}
site->start_button_mask = start_button_mask;
if (targets)
site->target_list = gtk_target_list_new (targets, n_targets);
else
site->target_list = NULL;
site->actions = actions;
}
/*************************************************************
* gtk_drag_source_set_icon:
* Set an icon for drags from this source.
* arguments:
* colormap: Colormap for this icon
* pixmap:
* mask
* results:
*************************************************************/
void
gtk_drag_source_set_icon (GtkWidget *widget,
GdkColormap *colormap,
GdkPixmap *pixmap,
GdkBitmap *mask)
{
GtkDragSourceSite *site;
g_return_if_fail (widget != NULL);
site = gtk_object_get_data (GTK_OBJECT (widget), "gtk-site-data");
g_return_if_fail (site != NULL);
if (site->colormap)
gdk_colormap_unref (site->colormap);
if (site->pixmap)
gdk_pixmap_unref (site->pixmap);
if (site->mask)
gdk_pixmap_unref (site->mask);
site->colormap = colormap;
if (colormap)
gdk_colormap_ref (colormap);
site->pixmap = pixmap;
if (pixmap)
gdk_pixmap_ref (pixmap);
site->mask = mask;
if (mask)
gdk_pixmap_ref (mask);
}
/*************************************************************
* gtk_drag_set_icon_widget:
* Set a widget as the icon for a drag.
* arguments:
* context:
* widget:
* hot_x: Hot spot
* hot_y:
* results:
*************************************************************/
void
gtk_drag_set_icon_widget (GdkDragContext *context,
GtkWidget *widget,
gint hot_x,
gint hot_y)
{
GtkDragSourceInfo *info;
g_return_if_fail (context != NULL);
g_return_if_fail (widget != NULL);
info = g_dataset_get_data (context, "gtk-info");
gtk_drag_remove_icon (info);
info->icon_window = widget;
if (widget)
{
gtk_widget_set_uposition (widget, info->cur_x, info->cur_y);
gtk_widget_ref (widget);
gdk_window_raise (widget->window);
gtk_widget_show (widget);
}
info->hot_x = hot_x;
info->hot_y = hot_y;
}
/*************************************************************
* gtk_drag_set_icon_pixmap:
* Set a widget as the icon for a drag.
* arguments:
* context:
* colormap: Colormap for the icon window.
* pixmap:
* mask:
* hot_x: Hot spot
* hot_y:
* results:
*************************************************************/
void
gtk_drag_set_icon_pixmap (GdkDragContext *context,
GdkColormap *colormap,
GdkPixmap *pixmap,
GdkBitmap *mask,
gint hot_x,
gint hot_y)
{
GtkWidget *window;
gint width, height;
g_return_if_fail (context != NULL);
g_return_if_fail (colormap != NULL);
g_return_if_fail (pixmap != NULL);
gdk_window_get_size (pixmap, &width, &height);
gtk_widget_push_visual (gdk_colormap_get_visual(colormap));
gtk_widget_push_colormap (colormap);
window = gtk_draw_window_new (GTK_WINDOW_POPUP);
gtk_widget_pop_visual ();
gtk_widget_pop_colormap ();
gtk_widget_set_usize (window, width, height);
gtk_widget_realize (window);
gdk_window_set_back_pixmap (window->window, pixmap, FALSE);
if (mask)
gtk_widget_shape_combine_mask (window, mask, 0, 0);
gtk_drag_set_icon_widget (context, window, hot_x, hot_y);
}
/*************************************************************
* gtk_drag_set_icon_default:
* Set the icon for a drag to the default icon.
* arguments:
* context:
* results:
*************************************************************/
void
gtk_drag_set_icon_default (GdkDragContext *context)
{
g_return_if_fail (context != NULL);
if (!default_icon_pixmap)
{
default_icon_colormap = gdk_colormap_get_system ();
default_icon_pixmap =
gdk_pixmap_colormap_create_from_xpm_d (NULL,
default_icon_colormap,
&default_icon_mask,
NULL, drag_default_xpm);
default_icon_hot_x = -2;
default_icon_hot_y = -2;
}
gtk_drag_set_icon_pixmap (context,
default_icon_colormap,
default_icon_pixmap,
default_icon_mask,
default_icon_hot_x,
default_icon_hot_y);
}
/*************************************************************
* gtk_drag_set_default_icon:
* Set a default icon for all drags as a pixmap.
* arguments:
* colormap: Colormap for the icon window.
* pixmap:
* mask:
* hot_x: Hot spot
* hot_y:
* results:
*************************************************************/
void
gtk_drag_set_default_icon (GdkColormap *colormap,
GdkPixmap *pixmap,
GdkBitmap *mask,
gint hot_x,
gint hot_y)
{
g_return_if_fail (colormap != NULL);
g_return_if_fail (pixmap != NULL);
if (default_icon_colormap)
gdk_colormap_unref (default_icon_colormap);
if (default_icon_pixmap)
gdk_pixmap_unref (default_icon_pixmap);
if (default_icon_mask)
gdk_pixmap_unref (default_icon_pixmap);
default_icon_colormap = colormap;
gdk_colormap_ref (colormap);
default_icon_pixmap = pixmap;
gdk_pixmap_ref (pixmap);
default_icon_mask = mask;
if (mask)
gdk_pixmap_ref (mask);
default_icon_hot_x = hot_x;
default_icon_hot_y = hot_y;
}
/*************************************************************
* 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 = g_dataset_get_data (context, "gtk-info");
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)
{
/* Aha - we can finally pass the MOTIF DROP on... */
gdk_drag_drop (info->context, info->proxy_dest->proxy_drop_time);
}
else
{
gdk_drag_status (info->proxy_dest->context,
event->dnd.context->action,
event->dnd.time);
}
}
}
else
{
cursor = gtk_drag_get_cursor (event->dnd.context->action);
if (info->cursor != cursor)
{
XChangeActivePointerGrab (GDK_WINDOW_XDISPLAY (widget->window),
PointerMotionMask | PointerMotionHintMask | ButtonReleaseMask,
((GdkCursorPrivate *)cursor)->xcursor,
event->dnd.time);
info->cursor = cursor;
}
if (info->last_event)
{
gtk_drag_motion_cb (info->widget,
(GdkEventMotion *)info->last_event,
info);
info->last_event = NULL;
}
}
}
break;
case GDK_DROP_FINISHED:
gtk_drag_drop_finished (info, TRUE, 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 (GPOINTER_TO_UINT (tmp_list->data) == selection)
return;
tmp_list = tmp_list->next;
}
gtk_selection_owner_set (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;
}
if (info->context->protocol == GDK_DRAG_PROTO_MOTIF)
{
gtk_selection_add_target (info->ipc_widget,
selection,
gdk_atom_intern ("XmTRANSFER_SUCCESS", FALSE),
TARGET_MOTIF_SUCCESS);
gtk_selection_add_target (info->ipc_widget,
selection,
gdk_atom_intern ("XmTRANSFER_FAILURE", FALSE),
TARGET_MOTIF_FAILURE);
}
gtk_selection_add_target (info->ipc_widget,
selection,
gdk_atom_intern ("DELETE", FALSE),
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,
gboolean success,
guint 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);
}
else
{
if (success)
{
gtk_drag_source_info_destroy (info);
}
else
{
GtkDragAnim *anim = g_new (GtkDragAnim, 1);
anim->info = info;
anim->step = 0;
anim->n_steps = MAX (info->cur_x - info->start_x,
info->cur_y - info->start_y) / ANIM_STEP_LENGTH;
anim->n_steps = CLAMP (anim->n_steps, ANIM_MIN_STEPS, ANIM_MAX_STEPS);
gtk_timeout_add (ANIM_STEP_TIME, gtk_drag_anim_timeout, anim);
}
}
gtk_drag_source_release_selections (info, GDK_CURRENT_TIME); /* fixme */
}
static void
gtk_drag_source_release_selections (GtkDragSourceInfo *info,
guint32 time)
{
GList *tmp_list = info->selections;
while (tmp_list)
{
GdkAtom selection = GPOINTER_TO_UINT (tmp_list->data);
if (gdk_selection_owner_get (selection) == info->ipc_widget->window)
gtk_selection_owner_set (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 (info->context->protocol == GDK_DRAG_PROTO_ROOTWIN)
{
GtkSelectionData selection_data;
GList *tmp_list;
GdkAtom target = gdk_atom_intern ("application/x-rootwin-drop", FALSE);
tmp_list = info->target_list->list;
while (tmp_list)
{
GtkTargetPair *pair = tmp_list->data;
if (pair->target == target)
{
selection_data.selection = GDK_NONE;
selection_data.target = target;
selection_data.data = NULL;
selection_data.length = -1;
gtk_signal_emit_by_name (GTK_OBJECT (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, TRUE, time);
return;
}
tmp_list = tmp_list->next;
}
gtk_drag_drop_finished (info, FALSE, time);
}
else
{
gdk_drag_drop (info->context, time);
info->drop_timeout = gtk_timeout_add (DROP_ABORT_TIME,
gtk_drag_abort_timeout,
info);
}
}
/*
* Source side callbacks.
*/
static gint
gtk_drag_source_event_cb (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
GtkDragSourceSite *site;
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 (MAX (abs(site->x - event->motion.x),
abs(site->y - event->motion.y)) > 3)
{
GtkDragSourceInfo *info;
GdkDragContext *context;
site->state = 0;
context = gtk_drag_begin (widget, site->target_list,
site->actions,
i, event);
info = g_dataset_get_data (context, "gtk-info");
if (!info->icon_window)
{
if (site->pixmap)
gtk_drag_set_icon_pixmap (context,
site->colormap,
site->pixmap,
site->mask, -2, -2);
else
gtk_drag_set_icon_default (context);
}
return TRUE;
}
}
break;
default: /* hit for 2/3BUTTON_PRESS */
break;
}
return FALSE;
}
static void
gtk_drag_source_site_destroy (gpointer data)
{
GtkDragSourceSite *site = data;
if (site->target_list)
gtk_target_list_unref (site->target_list);
if (site->pixmap)
gdk_pixmap_unref (site->pixmap);
if (site->mask)
gdk_pixmap_unref (site->mask);
g_free (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 ("NULL", FALSE);
switch (sel_info)
{
case TARGET_DELETE:
gtk_signal_emit_by_name (GTK_OBJECT (info->widget),
"drag_data_delete",
info->context);
gtk_selection_data_set (selection_data, null_atom, 8, NULL, 0);
break;
case TARGET_MOTIF_SUCCESS:
gtk_drag_drop_finished (info, TRUE, time);
gtk_selection_data_set (selection_data, null_atom, 8, NULL, 0);
break;
case TARGET_MOTIF_FAILURE:
gtk_drag_drop_finished (info, FALSE, time);
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,
selection_data->target,
time);
gtk_main();
info->proxy_dest->proxy_data = NULL;
}
else
{
if (gtk_target_list_find (info->target_list,
selection_data->target,
&target_info))
{
gtk_signal_emit_by_name (GTK_OBJECT (info->widget), "drag_data_get",
info->context,
selection_data,
target_info,
time);
}
}
break;
}
}
static gint
gtk_drag_anim_timeout (gpointer data)
{
GtkDragAnim *anim = data;
gint x, y;
if (anim->step == anim->n_steps)
{
gtk_drag_source_info_destroy (anim->info);
g_free (anim);
return FALSE;
}
else
{
x = (anim->info->start_x * (anim->step + 1) +
anim->info->cur_x * (anim->n_steps - anim->step - 1)) / anim->n_steps;
y = (anim->info->start_y * (anim->step + 1) +
anim->info->cur_y * (anim->n_steps - anim->step - 1)) / anim->n_steps;
if (anim->info->icon_window)
gtk_widget_set_uposition (anim->info->icon_window, x, y);
anim->step++;
return TRUE;
}
}
static void
gtk_drag_remove_icon (GtkDragSourceInfo *info)
{
if (info->icon_window)
{
gtk_widget_hide (info->icon_window);
gtk_widget_unref (info->icon_window);
info->icon_window = NULL;
}
}
static void
gtk_drag_source_info_destroy (gpointer data)
{
GtkDragSourceInfo *info = data;
gtk_drag_remove_icon (data);
if (!info->proxy_dest)
gtk_signal_emit_by_name (GTK_OBJECT (info->widget), "drag_end",
info->context);
if (info->widget)
gtk_widget_unref (info->widget);
gtk_signal_disconnect_by_data (GTK_OBJECT (info->ipc_widget), info);
gtk_selection_remove_all (info->ipc_widget);
gtk_object_set_data (GTK_OBJECT (info->ipc_widget), "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);
g_dataset_set_data (info->context, "gtk-info", NULL);
gdk_drag_context_unref (info->context);
if (info->drop_timeout)
gtk_timeout_remove (info->drop_timeout);
g_free (info);
}
/*************************************************************
* gtk_drag_motion_cb:
* "motion_notify_event" callback during drag.
* arguments:
*
* results:
*************************************************************/
static gint
gtk_drag_motion_cb (GtkWidget *widget,
GdkEventMotion *event,
gpointer data)
{
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
GdkAtom selection;
GdkDragAction action;
GdkWindow *window = NULL;
GdkWindow *dest_window;
GdkDragProtocol protocol;
gint x_root, y_root;
if (event->is_hint)
{
gdk_window_get_pointer (GDK_ROOT_PARENT(), &x_root, &y_root, NULL);
event->x_root = x_root;
event->y_root = y_root;
}
action = gtk_drag_get_event_action ((GdkEvent *)event,
info->button,
info->context->actions);
info->cur_x = event->x_root - info->hot_x;
info->cur_y = event->y_root - info->hot_y;
if (info->icon_window)
{
gdk_window_raise (info->icon_window->window);
gtk_widget_set_uposition (info->icon_window, info->cur_x, info->cur_y);
window = info->icon_window->window;
}
gdk_drag_find_window (info->context,
window, event->x_root, event->y_root,
&dest_window, &protocol);
if (gdk_drag_motion (info->context, dest_window, protocol,
event->x_root, event->y_root, action,
event->time))
{
if (info->last_event)
gdk_event_free ((GdkEvent *)info->last_event);
info->last_event = gdk_event_copy ((GdkEvent *)event);
}
if (dest_window)
gdk_window_unref (dest_window);
selection = gdk_drag_get_selection (info->context);
if (selection)
gtk_drag_source_check_selection (info, selection, event->time);
#if 0
/* We ignore the response, so we can respond precisely to the drop
*/
if (event->is_hint)
gdk_window_get_pointer (widget->window, NULL, NULL, NULL);
#endif
return TRUE;
}
/*************************************************************
* gtk_drag_motion_cb:
* "button_release_event" callback during drag.
* arguments:
*
* results:
*************************************************************/
static gint
gtk_drag_button_release_cb (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
GtkDragSourceInfo *info = (GtkDragSourceInfo *)data;
GtkWidget *source_widget = info->widget;
GdkEvent send_event;
gtk_widget_ref (source_widget);
if (event->button != info->button)
return FALSE;
gdk_pointer_ungrab (event->time);
if ((info->context->action != 0) && (info->context->dest_window != NULL))
{
gtk_drag_drop (info, event->time);
}
else
{
gdk_drag_abort (info->context, event->time);
gtk_drag_drop_finished (info, FALSE, event->time);
}
gtk_grab_remove (widget);
send_event.button.type = GDK_BUTTON_RELEASE;
send_event.button.window = source_widget->window;
send_event.button.x = 0;
send_event.button.y = 0;
send_event.button.state = event->state;
send_event.button.button = event->button;
send_event.button.time = event->time;
/* Send on the button release to the original widget to
* convince it to release its grab
*/
gtk_widget_event (source_widget, &send_event);
gtk_widget_unref (source_widget);
return TRUE;
}
static gint
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, FALSE, time);
return FALSE;
}
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