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cookbook: Refactored reusable animation example

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Extracted the animation into its own JSON definition,
then create a new script and get the animation each
time a rectangle is clicked.

Removes the need to reparent onto the background and
copy property values to the rectangle after the animation,
and generally much cleaner.
This commit is contained in:
Elliot Smith
2010-09-01 10:21:23 +01:00
parent acc28cf60c
commit d4190cbf8c
4 changed files with 158 additions and 190 deletions
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108
doc/cookbook/examples/animations-reuse.c
View File

@ -1,12 +1,38 @@
#include <stdlib.h>
#include <clutter/clutter.h>
#define UI_FILE "animations-reuse-ui.json"
#define ANIMATION_FILE "animations-reuse-animation.json"
static gboolean
_load_script (ClutterScript *script,
gchar *filename)
{
GError *error = NULL;
clutter_script_load_from_file (script, filename, &error);
if (error != NULL)
{
g_critical ("Error loading ClutterScript file %s\n%s", filename, error->message);
g_error_free (error);
exit (EXIT_FAILURE);
}
return TRUE;
}
gboolean
foo_button_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
ClutterScript *script = CLUTTER_SCRIPT (user_data);
ClutterScript *ui = CLUTTER_SCRIPT (user_data);
ClutterStage *stage = CLUTTER_STAGE (clutter_script_get_object (ui, "stage"));
ClutterScript *script = clutter_script_new ();
_load_script (script, ANIMATION_FILE);
ClutterAnimator *bounce;
ClutterActor *rig;
@ -18,13 +44,22 @@ foo_button_pressed_cb (ClutterActor *actor,
"bounce", &bounce,
NULL);
/* don't allow animation to be reused until it is complete */
if (clutter_timeline_is_playing (bounce_timeline))
return TRUE;
/* remove the button press handler */
g_signal_handlers_disconnect_matched (actor,
G_SIGNAL_MATCH_FUNC,
0,
0,
NULL,
foo_button_pressed_cb,
NULL);
clutter_actor_set_position (rig, 0, 0);
/* add a handler to clean up when the animation completes */
g_signal_connect_swapped (bounce_timeline,
"completed",
G_CALLBACK (g_object_unref),
script);
clutter_actor_set_scale (rig, 1.0, 1.0);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), rig);
clutter_actor_reparent (actor, rig);
@ -33,72 +68,13 @@ foo_button_pressed_cb (ClutterActor *actor,
return TRUE;
}
/* set the actor's position to the rig's position
* but parented to the background;
* remove the click handler so the rectangle can't be animated again
*/
static void
_move_to_background_cb (ClutterActor *actor,
gpointer user_data)
{
ClutterActor *background = CLUTTER_ACTOR (user_data);
gfloat x, y;
clutter_actor_get_position (clutter_actor_get_parent (actor), &x, &y);
gdouble scale_x, scale_y;
clutter_actor_get_scale (clutter_actor_get_parent (actor), &scale_x, &scale_y);
clutter_actor_reparent (actor, background);
clutter_actor_set_position (actor, x, y);
clutter_actor_set_scale (actor, scale_x, scale_y);
g_signal_handlers_disconnect_matched (actor,
G_SIGNAL_MATCH_FUNC,
0,
0,
NULL,
foo_button_pressed_cb,
NULL);
}
void
foo_rig_animation_complete_cb (ClutterTimeline *timeline,
gpointer user_data)
{
ClutterScript *script = CLUTTER_SCRIPT (user_data);
ClutterContainer *rig;
ClutterActor *background;
clutter_script_get_objects (script,
"rig", &rig,
"background", &background,
NULL);
clutter_container_foreach (rig,
CLUTTER_CALLBACK (_move_to_background_cb),
background);
}
int
main (int argc, char *argv[])
{
clutter_init (&argc, &argv);
gchar *filename = "animations-reuse.json";
GError *error = NULL;
ClutterScript *script = clutter_script_new ();
clutter_script_load_from_file (script, filename, &error);
if (error != NULL)
{
g_critical ("Error loading ClutterScript file %s\n%s", filename, error->message);
g_error_free (error);
exit (EXIT_FAILURE);
}
_load_script (script, UI_FILE);
clutter_script_connect_signals (script, script);