Added this function.

2001-02-11  Christopher James Lahey  <clahey@ximian.com>

	* gal/widgets/e-canvas-utils.c, gal/widgets/e-canvas-utils.h
	(e_canvas_item_show_area_delayed): Added this function.

svn path=/trunk/; revision=8168

1 files changed, 59 insertions, 9 deletions

diff --git a/widgets/misc/e-canvas-utils.c b/widgets/misc/e-canvas-utils.c
index f7b937a8fd..50fcf0d7e5 100644
--- a/widgets/misc/e-canvas-utils.c
+++ b/widgets/misc/e-canvas-utils.c
@@ -63,25 +63,75 @@ compute_offset(int top, int bottom, int page_top, int page_bottom)
 }
 
 
-void
-e_canvas_item_show_area (GnomeCanvasItem *item, double x1, double y1, double x2, double y2)
+static void
+e_canvas_show_area (GnomeCanvas *canvas, double x1, double y1, double x2, double y2)
 {
 	GtkAdjustment *h, *v;
 	int dx = 0, dy = 0;
 	
-	g_return_if_fail (item != NULL);
-	g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
-	
-	gnome_canvas_item_i2w(item, &x1, &y1);
-	gnome_canvas_item_i2w(item, &x2, &y2);
+	g_return_if_fail (canvas != NULL);
+	g_return_if_fail (GNOME_IS_CANVAS (canvas));
 
-	h = gtk_layout_get_hadjustment(GTK_LAYOUT(item->canvas));
+	h = gtk_layout_get_hadjustment(GTK_LAYOUT(canvas));
 	dx = compute_offset(x1, x2, h->value, h->value + h->page_size);
 	if (dx)
 		gtk_adjustment_set_value(h, CLAMP(h->value + dx, h->lower, h->upper - h->page_size));
 
-	v = gtk_layout_get_vadjustment(GTK_LAYOUT(item->canvas));
+	v = gtk_layout_get_vadjustment(GTK_LAYOUT(canvas));
 	dy = compute_offset(y1, y2, v->value, v->value + v->page_size);
 	if (dy)
 		gtk_adjustment_set_value(v, CLAMP(v->value + dy, v->lower, v->upper - v->page_size));
 }
+
+void
+e_canvas_item_show_area (GnomeCanvasItem *item, double x1, double y1, double x2, double y2)
+{
+	g_return_if_fail (item != NULL);
+	g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
+	
+	gnome_canvas_item_i2w(item, &x1, &y1);
+	gnome_canvas_item_i2w(item, &x2, &y2);
+
+	e_canvas_show_area(item->canvas, x1, y1, x2, y2);
+}
+
+typedef struct {
+	double x1;
+	double y1;
+	double x2;
+	double y2;
+	GnomeCanvas *canvas;
+} DoubsAndCanvas;
+
+static gboolean
+show_area_timeout (gpointer data)
+{
+	DoubsAndCanvas *dac = data;
+
+	if (!GTK_OBJECT_DESTROYED(dac->canvas))
+		e_canvas_show_area(dac->canvas, dac->x1, dac->y1, dac->x2, dac->y2);
+	gtk_object_unref(GTK_OBJECT(dac->canvas));
+	g_free(dac);
+	return FALSE;
+}
+
+void
+e_canvas_item_show_area_delayed (GnomeCanvasItem *item, double x1, double y1, double x2, double y2, gint delay)
+{
+	DoubsAndCanvas *dac;
+	
+	g_return_if_fail (item != NULL);
+	g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
+	
+	gnome_canvas_item_i2w(item, &x1, &y1);
+	gnome_canvas_item_i2w(item, &x2, &y2);
+
+	dac = g_new(DoubsAndCanvas, 1);
+	dac->x1 = x1;
+	dac->y1 = y1;
+	dac->x2 = x2;
+	dac->y2 = y2;
+	dac->canvas = item->canvas;
+	gtk_object_ref(GTK_OBJECT(item->canvas));
+	g_timeout_add(delay, show_area_timeout, dac);
+}