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app: don't bother to emit an "update" region if no handler is connected 

because constructing the region can be expensive. Also make sure not
to use g_object_set() if nothing would change to further reduce
"update" emissions.
This commit is contained in:
Michael Natterer 2010-10-01 17:43:41 +02:00
parent d9cd9f8a07
commit f0d01f611c
1 changed files with 56 additions and 28 deletions
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84
app/display/gimpcanvasitem.c
View File

@ -234,32 +234,42 @@ gimp_canvas_item_dispatch_properties_changed (GObject *object,
GParamSpec **pspecs)
{
GimpCanvasItem *item = GIMP_CANVAS_ITEM (object);
GdkRegion *before;
GdkRegion *region;
before = gimp_canvas_item_get_extents (item);
G_OBJECT_CLASS (parent_class)->dispatch_properties_changed (object,
n_pspecs,
pspecs);
region = gimp_canvas_item_get_extents (item);
if (! region)
if (g_signal_has_handler_pending (object, item_signals[UPDATE], 0, FALSE))
{
region = before;
GdkRegion *before;
GdkRegion *region;
before = gimp_canvas_item_get_extents (item);
G_OBJECT_CLASS (parent_class)->dispatch_properties_changed (object,
n_pspecs,
pspecs);
region = gimp_canvas_item_get_extents (item);
if (! region)
{
region = before;
}
else if (before)
{
gdk_region_union (region, before);
gdk_region_destroy (before);
}
if (region)
{
g_signal_emit (object, item_signals[UPDATE], 0,
region);
gdk_region_destroy (region);
}
}
else if (before)
else
{
gdk_region_union (region, before);
gdk_region_destroy (before);
}
if (region)
{
g_signal_emit (object, item_signals[UPDATE], 0,
region);
gdk_region_destroy (region);
G_OBJECT_CLASS (parent_class)->dispatch_properties_changed (object,
n_pspecs,
pspecs);
}
}
@ -346,22 +356,40 @@ void
gimp_canvas_item_set_line_cap (GimpCanvasItem *item,
cairo_line_cap_t line_cap)
{
GimpCanvasItemPrivate *private;
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
g_object_set (item,
"line-cap", line_cap,
NULL);
private = GET_PRIVATE (item);
line_cap = CLAMP (line_cap,
CAIRO_LINE_CAP_BUTT,
CAIRO_LINE_CAP_SQUARE);
if (private->line_cap != line_cap)
{
private->line_cap = line_cap;
g_object_notify (G_OBJECT (item), "line-cap");
}
}
void
gimp_canvas_item_set_highlight (GimpCanvasItem *item,
gboolean highlight)
{
GimpCanvasItemPrivate *private;
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
g_object_set (item,
"highlight", highlight,
NULL);
private = GET_PRIVATE (item);
highlight = highlight ? TRUE : FALSE;
if (private->highlight != highlight)
{
private->highlight = highlight;
g_object_notify (G_OBJECT (item), "highlight");
}
}
gboolean