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panel: programmatic anim. control of AnimatedIcon

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The AnimatedIcon does not have an API for controlling the animation but
relies on the :visible property changes to start and stop a timeout used
to update the frame.

This has the inconvenient of having a side effect when visible is set to
true multiple times, and is not really the API expected from such
component. Also, there is a race if it is displayed before the images
are loaded: there is no child yet and thus we get this._frame = NaN
which leads to a crash.

Switch to a play/stop API instead, and add a load event callback to the
TextureCache.load_slice_image to exactly know when we can start using
the images.

https://bugzilla.gnome.org/show_bug.cgi?id=687583
This commit is contained in:
Stéphane Démurget
2012-11-05 23:11:27 +01:00
parent f084011a61
commit c48a246ccb
3 changed files with 51 additions and 18 deletions
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20
src/st/st-texture-cache.c
View File

@ -1073,6 +1073,8 @@ typedef struct {
gchar *path;
gint grid_width, grid_height;
ClutterActor *actor;
GFunc load_callback;
gpointer load_callback_data;
} AsyncImageData;
static void
@ -1089,6 +1091,7 @@ on_sliced_image_loaded (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
GObject *cache = source_object;
AsyncImageData *data = (AsyncImageData *)user_data;
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
GList *list;
@ -1102,6 +1105,9 @@ on_sliced_image_loaded (GObject *source_object,
clutter_actor_hide (actor);
clutter_actor_add_child (data->actor, actor);
}
if (data->load_callback != NULL)
data->load_callback (cache, data->load_callback_data);
}
static void
@ -1156,6 +1162,8 @@ load_sliced_image (GSimpleAsyncResult *result,
* @path: Path to a filename
* @grid_width: Width in pixels
* @grid_height: Height in pixels
* @load_callback: (scope async) (allow-none): Function called when the image is loaded, or %NULL
* @user_data: Data to pass to the load callback
*
* This function reads a single image file which contains multiple images internally.
* The image file will be divided using @grid_width and @grid_height;
@ -1165,10 +1173,12 @@ load_sliced_image (GSimpleAsyncResult *result,
* Returns: (transfer none): A new #ClutterActor
*/
ClutterActor *
st_texture_cache_load_sliced_image (StTextureCache *cache,
const gchar *path,
gint grid_width,
gint grid_height)
st_texture_cache_load_sliced_image (StTextureCache *cache,
const gchar *path,
gint grid_width,
gint grid_height,
GFunc load_callback,
gpointer user_data)
{
AsyncImageData *data;
GSimpleAsyncResult *result;
@ -1179,6 +1189,8 @@ st_texture_cache_load_sliced_image (StTextureCache *cache,
data->grid_height = grid_height;
data->path = g_strdup (path);
data->actor = actor;
data->load_callback = load_callback;
data->load_callback_data = user_data;
g_object_ref (G_OBJECT (actor));
result = g_simple_async_result_new (G_OBJECT (cache), on_sliced_image_loaded, data, st_texture_cache_load_sliced_image);

10
src/st/st-texture-cache.h
View File

@ -69,10 +69,12 @@ GType st_texture_cache_get_type (void) G_GNUC_CONST;
StTextureCache* st_texture_cache_get_default (void);
ClutterActor *
st_texture_cache_load_sliced_image (StTextureCache *cache,
const gchar *path,
gint grid_width,
gint grid_height);
st_texture_cache_load_sliced_image (StTextureCache *cache,
const gchar *path,
gint grid_width,
gint grid_height,
GFunc load_callback,
gpointer user_data);
ClutterActor *st_texture_cache_bind_pixbuf_property (StTextureCache *cache,
GObject *object,