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[actor] Add :clip-to-allocation property

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A common use of setting clip is to keep an actor inside its allocation;
right now to do this you have to set up a callback on notify::allocation.

There's no overhead added by sticking another bit in ClutterActor
clip-to-allocation that will clip painting to the allocation if set.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Havoc Pennington 2009-03-16 11:58:58 +00:00 committed by Emmanuele Bassi
parent 0cb0a841cc
commit 5706105123
1 changed files with 44 additions and 0 deletions
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44
clutter/clutter-actor.c
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@ -246,6 +246,7 @@ struct _ClutterActorPrivate
guint show_on_set_parent : 1;
guint has_clip : 1;
guint clip_to_allocation : 1;
ClutterUnit clip[4];
@ -336,6 +337,7 @@ enum
PROP_CLIP,
PROP_HAS_CLIP,
PROP_CLIP_TO_ALLOCATION,
PROP_OPACITY,
PROP_VISIBLE,
@ -1539,6 +1541,18 @@ clutter_actor_paint (ClutterActor *self)
CLUTTER_UNITS_TO_FLOAT (priv->clip[3]));
clip_set = TRUE;
}
else if (priv->clip_to_allocation)
{
ClutterUnit width, height;
width = priv->allocation.x2 - priv->allocation.x1;
height = priv->allocation.y2 - priv->allocation.y1;
cogl_clip_push (0, 0,
CLUTTER_UNITS_TO_FLOAT (width),
CLUTTER_UNITS_TO_FLOAT (height));
clip_set = TRUE;
}
context = clutter_context_get_default ();
if (G_UNLIKELY (context->pick_mode != CLUTTER_PICK_NONE))
@ -1740,6 +1754,13 @@ clutter_actor_set_property (GObject *object,
geom->width, geom->height);
}
break;
case PROP_CLIP_TO_ALLOCATION:
if (priv->clip_to_allocation != g_value_get_boolean (value))
{
priv->clip_to_allocation = g_value_get_boolean (value);
clutter_actor_queue_redraw (actor);
}
break;
case PROP_REACTIVE:
clutter_actor_set_reactive (actor, g_value_get_boolean (value));
break;
@ -1931,6 +1952,9 @@ clutter_actor_get_property (GObject *object,
g_value_set_boxed (value, &clip);
}
break;
case PROP_CLIP_TO_ALLOCATION:
g_value_set_boolean (value, priv->clip_to_allocation);
break;
case PROP_SCALE_X:
g_value_set_double (value, priv->scale_x);
break;
@ -2774,6 +2798,26 @@ clutter_actor_class_init (ClutterActorClass *klass)
TRUE,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:clip-to-allocation:
*
* Whether the clip region should track the allocated area
* of the actor.
*
* This property is ignored if a clip area has been explicitly
* set using clutter_actor_set_clip().
*
* Since: 1.0
*/
pspec = g_param_spec_boolean ("clip-to-allocation",
"Clip to Allocation",
"Sets the clip region to track the "
"actor's allocation",
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_CLIP_TO_ALLOCATION,
pspec);
/**
* ClutterActor::destroy: