/* GTK - The GIMP Toolkit * Copyright (C) 1995-1999 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 "gtkwindow.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 300000 #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 (state & (GDK_MOD1_MASK)) return GDK_ACTION_ASK; 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, const 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_origin (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); if (context->protocol == GDK_DRAG_PROTO_MOTIF) gtk_drag_finish (context, FALSE, FALSE, 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 (data->found || !GTK_WIDGET_MAPPED (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_forall (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, const 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_unset * Unregister this widget as a drag source. * arguments: * widget: * results: *************************************************************/ void gtk_drag_source_unset (GtkWidget *widget) { GtkDragSourceSite *site; g_return_if_fail (widget != NULL); site = gtk_object_get_data (GTK_OBJECT (widget), "gtk-site-data"); if (site) { gtk_signal_disconnect_by_data (GTK_OBJECT (widget), site); gtk_object_set_data (GTK_OBJECT (widget), "gtk-site-data", NULL); } } /************************************************************* * 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_window_new (GTK_WINDOW_POPUP); gtk_widget_set_events (window, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK); gtk_widget_set_app_paintable (GTK_WIDGET (window), TRUE); 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) { 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) { 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); if (info->icon_window) { gtk_widget_show(info->icon_window); gdk_window_raise (info->icon_window->window); } /* Mark the context as dead, so if the destination decides * to respond really late, we still are OK. */ g_dataset_set_data (info->context, "gtk-info", NULL); gtk_timeout_add (ANIM_STEP_TIME, gtk_drag_anim_timeout, anim); } } } 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 { if (info->icon_window) gtk_widget_hide (info->icon_window); 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; gboolean retval; GDK_THREADS_ENTER (); if (anim->step == anim->n_steps) { gtk_drag_source_info_destroy (anim->info); g_free (anim); retval = 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++; retval = TRUE; } GDK_THREADS_LEAVE (); return retval; } 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); gtk_signal_disconnect_by_func (GTK_OBJECT (widget), GTK_SIGNAL_FUNC (gtk_drag_button_release_cb), info); gtk_signal_disconnect_by_func (GTK_OBJECT (widget), GTK_SIGNAL_FUNC (gtk_drag_motion_cb), info); /* Send on a release pair to the 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.button.type = GDK_BUTTON_RELEASE; send_event.button.window = GDK_ROOT_PARENT (); send_event.button.send_event = TRUE; send_event.button.time = event->time; send_event.button.x = 0; send_event.button.y = 0; send_event.button.pressure = 0.; send_event.button.xtilt = 0.; send_event.button.ytilt = 0.; send_event.button.state = event->state; send_event.button.button = event->button; send_event.button.source = GDK_SOURCE_PEN; send_event.button.deviceid = GDK_CORE_POINTER; send_event.button.x_root = 0; send_event.button.y_root = 0; gtk_propagate_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; }