Switch from gnome_canvas_item_grab to e_canvas_item_grab.

2002-05-09  Christopher James Lahey  <clahey@ximian.com>

	* gal/e-text/e-text.c: Switch from gnome_canvas_item_grab to
	e_canvas_item_grab.

	* gal/widgets/e-canvas.c, gal/widgets/e-canvas.h
	(e_canvas_item_grab, e_canvas_item_ungrab): Added these functions.

From gal/e-table/ChangeLog:

2002-05-09  Christopher James Lahey  <clahey@ximian.com>

	* e-table-item.c, e-table-item.h: Switched from
	gnome_canvas_item_grab to e_canvas_item_grab.

svn path=/trunk/; revision=16738

2 files changed, 111 insertions, 18 deletions

diff --git a/widgets/misc/e-canvas.c b/widgets/misc/e-canvas.c
index 378bc31e56..e5b0b78bcd 100644
--- a/widgets/misc/e-canvas.c
+++ b/widgets/misc/e-canvas.c
@@ -24,6 +24,8 @@
 #include <gtk/gtksignal.h>
 #include "e-canvas.h"
 #include "gal/util/e-util.h"
+#include <X11/Xlib.h>
+#include <gtk/gtkmain.h>
 
 static void e_canvas_init           (ECanvas         *card);
 static void e_canvas_destroy        (GtkObject        *object);
@@ -1082,3 +1084,69 @@ void e_canvas_hide_tooltip  (ECanvas *canvas)
 		canvas->tooltip_window = NULL;
 	}
 }
+
+
+static gboolean
+grab_cancelled_check (gpointer data)
+{
+	ECanvas *canvas = data;
+
+	if (gtk_grab_get_current ()) {
+		gnome_canvas_item_ungrab(GNOME_CANVAS (canvas)->grabbed_item, canvas->grab_cancelled_time);
+		if (canvas->grab_cancelled_cb) {
+			canvas->grab_cancelled_cb (canvas,
+						   GNOME_CANVAS (canvas)->grabbed_item,
+						   canvas->grab_cancelled_data);
+		}
+		canvas->grab_cancelled_cb = NULL;
+		canvas->grab_cancelled_check_id = 0;
+		canvas->grab_cancelled_time = 0;
+		canvas->grab_cancelled_data = NULL;
+		return FALSE;
+	}
+	return TRUE;
+}
+
+int
+e_canvas_item_grab (ECanvas *canvas,
+		    GnomeCanvasItem *item,
+		    guint event_mask,
+		    GdkCursor *cursor,
+		    guint32 etime,
+		    ECanvasItemGrabCancelled cancelled_cb,
+		    gpointer cancelled_data)
+{
+	if (gtk_grab_get_current ()) {
+		return AlreadyGrabbed;
+	} else {
+		int ret_val = gnome_canvas_item_grab (item, event_mask, cursor, etime);
+		if (ret_val == GrabSuccess) {
+			canvas->grab_cancelled_cb = cancelled_cb;
+			canvas->grab_cancelled_check_id =
+				g_timeout_add_full (G_PRIORITY_LOW,
+						    100,
+						    grab_cancelled_check,
+						    canvas,
+						    NULL);
+			canvas->grab_cancelled_time = etime;
+			canvas->grab_cancelled_data = cancelled_data;
+		}
+
+		return ret_val;
+	}
+}
+
+void
+e_canvas_item_ungrab (ECanvas *canvas,
+		      GnomeCanvasItem *item,
+		      guint32 etime)
+{
+	if (canvas->grab_cancelled_check_id) {
+		g_source_remove (canvas->grab_cancelled_check_id);
+		canvas->grab_cancelled_cb = NULL;
+		canvas->grab_cancelled_check_id = 0;
+		canvas->grab_cancelled_time = 0;
+		canvas->grab_cancelled_data = NULL;
+		gnome_canvas_item_ungrab (item, etime);
+	}
+}
diff --git a/widgets/misc/e-canvas.h b/widgets/misc/e-canvas.h
index ee25a4b6bf..fb0d7398e7 100644
--- a/widgets/misc/e-canvas.h
+++ b/widgets/misc/e-canvas.h
@@ -74,6 +74,8 @@ typedef struct {
 	gpointer         id;
 } ECanvasSelectionInfo;
 
+typedef void (*ECanvasItemGrabCancelled) (ECanvas *canvas, GnomeCanvasItem *item, gpointer data);
+
 struct _ECanvas
 {
 	GnomeCanvas parent;
@@ -90,6 +92,11 @@ struct _ECanvas
 	/* Input context for dead key support */
 	GdkIC     *ic;
 	GdkICAttr *ic_attr;
+
+	ECanvasItemGrabCancelled grab_cancelled_cb;
+	guint grab_cancelled_check_id;
+	guint32 grab_cancelled_time;
+	gpointer grab_cancelled_data;
 };
 
 struct _ECanvasClass
@@ -99,30 +106,48 @@ struct _ECanvasClass
 };
 
 
-GtkType    e_canvas_get_type (void);
-GtkWidget *e_canvas_new      (void);
+GtkType    e_canvas_get_type                             (void);
+GtkWidget *e_canvas_new                                  (void);
 
 /* Used to send all of the keystroke events to a specific item as well as
  * GDK_FOCUS_CHANGE events.
  */
-void e_canvas_item_grab_focus (GnomeCanvasItem *item, gboolean widget_too);
-
-void e_canvas_item_request_reflow (GnomeCanvasItem *item);
-void e_canvas_item_request_parent_reflow (GnomeCanvasItem *item);
-void e_canvas_item_set_reflow_callback (GnomeCanvasItem *item, ECanvasItemReflowFunc func);
-
-void e_canvas_item_set_selection_callback (GnomeCanvasItem *item, ECanvasItemSelectionFunc func);
-void e_canvas_item_set_selection_compare_callback (GnomeCanvasItem *item, ECanvasItemSelectionCompareFunc func);
-
-void e_canvas_item_set_cursor (GnomeCanvasItem *item, gpointer id);
-void e_canvas_item_add_selection (GnomeCanvasItem *item, gpointer id);
-void e_canvas_item_remove_selection (GnomeCanvasItem *item, gpointer id);
+void       e_canvas_item_grab_focus                      (GnomeCanvasItem                 *item,
+							  gboolean                         widget_too);
+void       e_canvas_item_request_reflow                  (GnomeCanvasItem                 *item);
+void       e_canvas_item_request_parent_reflow           (GnomeCanvasItem                 *item);
+void       e_canvas_item_set_reflow_callback             (GnomeCanvasItem                 *item,
+							  ECanvasItemReflowFunc            func);
+void       e_canvas_item_set_selection_callback          (GnomeCanvasItem                 *item,
+							  ECanvasItemSelectionFunc         func);
+void       e_canvas_item_set_selection_compare_callback  (GnomeCanvasItem                 *item,
+							  ECanvasItemSelectionCompareFunc  func);
+void       e_canvas_item_set_cursor                      (GnomeCanvasItem                 *item,
+							  gpointer                         id);
+void       e_canvas_item_add_selection                   (GnomeCanvasItem                 *item,
+							  gpointer                         id);
+void       e_canvas_item_remove_selection                (GnomeCanvasItem                 *item,
+							  gpointer                         id);
+
+int        e_canvas_item_grab                            (ECanvas                         *canvas,
+							  GnomeCanvasItem                 *item,
+							  guint                            event_mask,
+							  GdkCursor                       *cursor,
+							  guint32                          etime,
+							  ECanvasItemGrabCancelled         cancelled,
+							  gpointer                         cancelled_data);
+void       e_canvas_item_ungrab                          (ECanvas                         *canvas,
+							  GnomeCanvasItem                 *item,
+							  guint32                          etime);
 
 /* Not implemented yet. */
-void e_canvas_item_set_cursor_end (GnomeCanvasItem *item, gpointer id);
-
-void e_canvas_popup_tooltip (ECanvas *canvas, GtkWidget *widget, int x, int y);
-void e_canvas_hide_tooltip  (ECanvas *canvas);
+void       e_canvas_item_set_cursor_end                  (GnomeCanvasItem                 *item,
+							  gpointer                         id);
+void       e_canvas_popup_tooltip                        (ECanvas                         *canvas,
+							  GtkWidget                       *widget,
+							  int                              x,
+							  int                              y);
+void       e_canvas_hide_tooltip                         (ECanvas                         *canvas);
 
 #ifdef __cplusplus
 }