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MetaBackgroundActor: add a dim-factor property

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This property darkens the background.

https://bugzilla.gnome.org/show_bug.cgi?id=656433
This commit is contained in:
Rui Matos 2011-08-26 19:01:00 +01:00
parent c630046858
commit 53e70b3e99
1 changed files with 92 additions and 3 deletions
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95
src/compositor/meta-background-actor.c
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@ -69,8 +69,20 @@ struct _MetaBackgroundActor
MetaScreenBackground *background;
CoglHandle material;
cairo_region_t *visible_region;
float dim_factor;
};
enum
{
PROP_0,
PROP_DIM_FACTOR,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST];
G_DEFINE_TYPE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYPE_ACTOR);
static void set_texture (MetaScreenBackground *background,
@ -284,13 +296,19 @@ static void
meta_background_actor_paint (ClutterActor *actor)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
guchar opacity = clutter_actor_get_paint_opacity (actor);
guint8 opacity = clutter_actor_get_paint_opacity (actor);
guint8 color_component;
int width, height;
meta_screen_get_size (self->background->screen, &width, &height);
color_component = (int)(0.5 + opacity * self->dim_factor);
cogl_material_set_color4ub (self->material,
opacity, opacity, opacity, opacity);
color_component,
color_component,
color_component,
opacity);
cogl_set_source (self->material);
@ -337,23 +355,94 @@ meta_background_actor_get_paint_volume (ClutterActor *actor,
return TRUE;
}
static void
meta_background_actor_set_dim_factor (MetaBackgroundActor *self,
gfloat dim_factor)
{
if (self->dim_factor == dim_factor)
return;
self->dim_factor = dim_factor;
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_DIM_FACTOR]);
}
static void
meta_background_actor_get_property(GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
switch (prop_id)
{
case PROP_DIM_FACTOR:
g_value_set_float (value, self->dim_factor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_set_property(GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
switch (prop_id)
{
case PROP_DIM_FACTOR:
meta_background_actor_set_dim_factor (self, g_value_get_float (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_class_init (MetaBackgroundActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
object_class->dispose = meta_background_actor_dispose;
object_class->get_property = meta_background_actor_get_property;
object_class->set_property = meta_background_actor_set_property;
actor_class->get_preferred_width = meta_background_actor_get_preferred_width;
actor_class->get_preferred_height = meta_background_actor_get_preferred_height;
actor_class->paint = meta_background_actor_paint;
actor_class->get_paint_volume = meta_background_actor_get_paint_volume;
/**
* MetaBackgroundActor:dim-factor:
*
* Factor to dim the background by, between 0.0 (black) and 1.0 (original
* colors)
*/
pspec = g_param_spec_float ("dim-factor",
"Dim factor",
"Factor to dim the background by",
0.0, 1.0,
1.0,
G_PARAM_READWRITE);
obj_props[PROP_DIM_FACTOR] = pspec;
g_object_class_install_property (object_class, PROP_DIM_FACTOR, pspec);
}
static void
meta_background_actor_init (MetaBackgroundActor *background_actor)
meta_background_actor_init (MetaBackgroundActor *self)
{
self->dim_factor = 1.0;
}
/**