Use e_canvas_hide_tooltip and e_canvas_popup_tooltip. Set bold on the

2001-04-15  Christopher James Lahey  <clahey@ximian.com>

	* gal/e-text/e-text.c (tooltip_event): Use e_canvas_hide_tooltip
	and e_canvas_popup_tooltip.  Set bold on the tooltip.

	* gal/widgets/e-canvas.c, gal/widgets/e-canvas.h: Added
	e_canvas_popup_tooltip and e_canvas_hide_tooltip.

svn path=/trunk/; revision=9323

2 files changed, 63 insertions, 0 deletions

diff --git a/widgets/misc/e-canvas.c b/widgets/misc/e-canvas.c
index 91fbca29b8..e48c6bb821 100644
--- a/widgets/misc/e-canvas.c
+++ b/widgets/misc/e-canvas.c
@@ -31,6 +31,10 @@ static void e_canvas_unrealize      (GtkWidget        *widget);
 static gint e_canvas_key            (GtkWidget        *widget,
 				     GdkEventKey      *event);
 
+static gint e_canvas_visibility     (GtkWidget        *widget,
+				     GdkEventVisibility *event,
+				     ECanvas          *canvas);
+
 static gint e_canvas_focus_in       (GtkWidget        *widget,
 				     GdkEventFocus    *event);
 static gint e_canvas_focus_out      (GtkWidget        *widget,
@@ -114,6 +118,7 @@ e_canvas_init (ECanvas *canvas)
 	canvas->cursor = NULL;
 	canvas->ic = NULL;
 	canvas->ic_attr = NULL;
+	canvas->tooltip_window = NULL;
 }
 
 static void
@@ -124,6 +129,16 @@ e_canvas_destroy (GtkObject *object)
 	if (canvas->idle_id)
 		g_source_remove(canvas->idle_id);
 
+	if (canvas->toplevel) {
+		if (canvas->visibility_notify_id)
+			gtk_signal_disconnect (GTK_OBJECT(canvas->toplevel),
+					       canvas->visibility_notify_id);
+		canvas->visibility_notify_id = 0;
+
+		gtk_object_unref(GTK_OBJECT(canvas->toplevel));
+		canvas->toplevel = NULL;
+	}
+
 	if ((GTK_OBJECT_CLASS (parent_class))->destroy)
 		(*(GTK_OBJECT_CLASS (parent_class))->destroy) (object);
 }
@@ -284,6 +299,18 @@ e_canvas_key (GtkWidget *widget, GdkEventKey *event)
 	return emit_event (canvas, &full_event);
 }
 
+/* Key event handler for the canvas */
+static gint
+e_canvas_visibility (GtkWidget *widget, GdkEventVisibility *event, ECanvas *canvas)
+{
+	if (! canvas->visibility_first) {
+		e_canvas_hide_tooltip(canvas);
+	}
+	canvas->visibility_first = FALSE;
+
+	return FALSE;
+}
+
 
 /**
  * e_canvas_item_grab_focus:
@@ -703,3 +730,31 @@ e_canvas_item_remove_selection (GnomeCanvasItem *item, gpointer id)
 		}
 	}
 }
+
+void e_canvas_popup_tooltip (ECanvas *canvas, GtkWidget *widget, int x, int y)
+{
+	if (canvas->tooltip_window && canvas->tooltip_window != widget) {
+		e_canvas_hide_tooltip(canvas);
+	}
+	canvas->tooltip_window = widget;
+	canvas->visibility_first = TRUE;
+	if (canvas->toplevel == NULL) {
+		canvas->toplevel = gtk_widget_get_toplevel (GTK_WIDGET(canvas));
+		if (canvas->toplevel) {
+			gtk_widget_add_events(canvas->toplevel, GDK_VISIBILITY_NOTIFY_MASK);
+			gtk_object_ref(GTK_OBJECT(canvas->toplevel));
+			canvas->visibility_notify_id =
+				gtk_signal_connect (GTK_OBJECT (canvas->toplevel), "visibility_notify_event",
+						    GTK_SIGNAL_FUNC (e_canvas_visibility), canvas);
+		}
+	}
+	gtk_widget_popup (widget, x, y);
+}
+
+void e_canvas_hide_tooltip  (ECanvas *canvas)
+{
+	if (canvas->tooltip_window) {
+		gtk_widget_destroy (canvas->tooltip_window);
+		canvas->tooltip_window = NULL;
+	}
+}
diff --git a/widgets/misc/e-canvas.h b/widgets/misc/e-canvas.h
index 212fda7c2f..820dcddc2e 100644
--- a/widgets/misc/e-canvas.h
+++ b/widgets/misc/e-canvas.h
@@ -79,6 +79,11 @@ struct _ECanvas
 	GList                *selection;
 	ECanvasSelectionInfo *cursor;
 
+	GtkWidget            *tooltip_window;
+	int                   visibility_notify_id;
+	GtkWidget            *toplevel;
+	guint visibility_first : 1;
+
 	/* Input context for dead key support */
 	GdkIC     *ic;
 	GdkICAttr *ic_attr;
@@ -113,6 +118,9 @@ void e_canvas_item_remove_selection (GnomeCanvasItem *item, gpointer id);
 /* 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);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */