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examples/threads: Modernize code 

Drop the usage of behaviours and alphas, and use transitions and
implicit animations instead.
This commit is contained in:
Emmanuele Bassi 2012-06-04 23:16:30 +01:00
parent 0acc85dab1
commit 7381050ab1
1 changed files with 67 additions and 54 deletions
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121
examples/threads.c
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@ -8,8 +8,10 @@ typedef struct
ClutterActor *stage;
ClutterActor *label;
ClutterActor *progress;
ClutterActor *rect;
ClutterTimeline *timeline;
ClutterTransition *flip;
ClutterTransition *bounce;
} TestThreadData;
static TestThreadData *
@ -33,7 +35,9 @@ test_thread_data_free (gpointer _data)
g_object_unref (data->progress);
g_object_unref (data->label);
g_object_unref (data->stage);
g_object_unref (data->timeline);
g_object_unref (data->rect);
g_object_unref (data->flip);
g_object_unref (data->bounce);
g_free (data);
}
@ -43,14 +47,14 @@ test_thread_done_idle (gpointer user_data)
{
TestThreadData *data = user_data;
g_print ("Thread completed\n");
clutter_text_set_text (CLUTTER_TEXT (data->label), "Completed");
clutter_timeline_stop (data->timeline);
clutter_actor_remove_transition (data->rect, "bounce");
clutter_actor_remove_transition (data->rect, "flip");
test_thread_data_free (data);
return FALSE;
return G_SOURCE_REMOVE;
}
static void
@ -58,6 +62,8 @@ test_thread_data_done (gpointer _data)
{
TestThreadData *data = _data;
g_print ("Thread completed\n");
/* since the TestThreadData structure references Clutter data structures
* we need to free it from within the same thread that called clutter_main()
* which means using an idle handler in the main loop.
@ -65,13 +71,15 @@ test_thread_data_done (gpointer _data)
* clutter_threads_add_idle() is guaranteed to run the callback passed to
* to it under the Big Clutter Lock.
*/
clutter_threads_add_idle (test_thread_done_idle, data);
clutter_threads_add_idle_full (G_PRIORITY_HIGH,
test_thread_done_idle, data,
NULL);
}
/* thread local storage */
static GPrivate test_thread_data = G_PRIVATE_INIT (test_thread_data_done);
typedef struct
{
typedef struct {
gint count;
TestThreadData *thread_data;
} TestUpdate;
@ -85,6 +93,7 @@ update_label_idle (gpointer data)
text = g_strdup_printf ("Count to %d", update->count);
clutter_text_set_text (CLUTTER_TEXT (update->thread_data->label), text);
clutter_actor_set_width (update->thread_data->label, -1);
if (update->count == 0)
@ -94,12 +103,14 @@ update_label_idle (gpointer data)
else
width = (guint) (update->count / 100.0 * 350.0);
clutter_actor_save_easing_state (update->thread_data->progress);
clutter_actor_set_width (update->thread_data->progress, width);
clutter_actor_restore_easing_state (update->thread_data->progress);
g_free (text);
g_free (update);
return FALSE;
return G_SOURCE_REMOVE;
}
static void
@ -110,7 +121,7 @@ do_something_very_slow (void)
data = g_private_get (&test_thread_data);
for (i = 0; i < 100; i++)
for (i = 0; i <= 100; i++)
{
gint msecs;
@ -152,10 +163,12 @@ test_thread_func (gpointer user_data)
return NULL;
}
static ClutterTimeline *timeline = NULL;
static ClutterActor *count_label = NULL;
static ClutterActor *help_label = NULL;
static ClutterActor *progress_rect = NULL;
static ClutterActor *rect = NULL;
static ClutterTransition *flip = NULL;
static ClutterTransition *bounce = NULL;
static gboolean
on_key_press_event (ClutterStage *stage,
@ -169,42 +182,43 @@ on_key_press_event (ClutterStage *stage,
case CLUTTER_KEY_s:
clutter_text_set_text (CLUTTER_TEXT (help_label), "Press 'q' to quit");
clutter_timeline_start (timeline);
/* start the animations */
clutter_actor_add_transition (rect, "flip", flip);
clutter_actor_add_transition (rect, "bounce", bounce);
/* the data structure holding all our objects */
data = test_thread_data_new ();
data->stage = g_object_ref (stage);
data->label = g_object_ref (count_label);
data->progress = g_object_ref (progress_rect);
data->timeline = g_object_ref (timeline);
data->rect = g_object_ref (rect);
data->flip = g_object_ref (flip);
data->bounce = g_object_ref (bounce);
/* start the thread that updates the counter and the progress bar */
g_thread_new ("counter", test_thread_func, data);
return TRUE;
return CLUTTER_EVENT_STOP;
case CLUTTER_KEY_q:
clutter_main_quit ();
return TRUE;
return CLUTTER_EVENT_STOP;
default:
break;
}
return FALSE;
return CLUTTER_EVENT_PROPAGATE;
}
int
main (int argc, char *argv[])
{
ClutterTransition *transition;
ClutterActor *stage;
ClutterActor *rect;
ClutterBehaviour *r_behaviour, *p_behaviour;
ClutterAlpha *alpha;
const ClutterKnot knots[] = {
{ 75, 150 },
{ 400, 150 }
};
ClutterPoint start = CLUTTER_POINT_INIT (75.f, 150.f);
ClutterPoint end = CLUTTER_POINT_INIT (400.f, 150.f);
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
@ -217,41 +231,44 @@ main (int argc, char *argv[])
count_label = clutter_text_new_with_text ("Mono 12", "Counter");
clutter_actor_set_position (count_label, 350, 50);
clutter_actor_add_child (stage, count_label);
help_label = clutter_text_new_with_text ("Mono 12", "Press 's' to start");
clutter_actor_set_position (help_label, 50, 50);
clutter_actor_add_child (stage, help_label);
rect = clutter_rectangle_new_with_color (CLUTTER_COLOR_LightScarletRed);
/* a progress bar */
progress_rect = clutter_actor_new ();
clutter_actor_set_background_color (progress_rect, CLUTTER_COLOR_DarkChameleon);
clutter_actor_set_position (progress_rect, 50, 225);
clutter_actor_set_size (progress_rect, 350, 50);
clutter_actor_add_child (stage, progress_rect);
/* an actor we bounce around */
rect = clutter_actor_new ();
clutter_actor_set_background_color (rect, CLUTTER_COLOR_LightScarletRed);
clutter_actor_set_position (rect, 75, 150);
clutter_actor_set_size (rect, 50, 50);
clutter_actor_set_anchor_point (rect, 25, 25);
clutter_actor_set_opacity (rect, 224);
clutter_actor_add_child (stage, rect);
progress_rect = clutter_rectangle_new_with_color (CLUTTER_COLOR_DarkChameleon);
clutter_actor_set_position (progress_rect, 50, 225);
clutter_actor_set_size (progress_rect, 350, 50);
/* two transitions we use to bounce rect around */
transition = clutter_property_transition_new ("rotation-angle-z");
clutter_transition_set_from (transition, G_TYPE_DOUBLE, 0.0);
clutter_transition_set_to (transition, G_TYPE_DOUBLE, 360.0);
clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), -1);
clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE);
clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 3000);
flip = transition;
clutter_container_add (CLUTTER_CONTAINER (stage),
count_label, help_label,
rect, progress_rect,
NULL);
timeline = clutter_timeline_new (3000);
clutter_timeline_set_auto_reverse (timeline, TRUE);
clutter_timeline_set_repeat_count (timeline, -1);
alpha = clutter_alpha_new_full (timeline, CLUTTER_LINEAR);
r_behaviour = clutter_behaviour_rotate_new (alpha,
CLUTTER_Z_AXIS,
CLUTTER_ROTATE_CW,
0.0, 360.0);
clutter_behaviour_apply (r_behaviour, rect);
alpha = clutter_alpha_new_full (timeline, CLUTTER_LINEAR);
p_behaviour = clutter_behaviour_path_new_with_knots (alpha,
knots,
G_N_ELEMENTS (knots));
clutter_behaviour_apply (p_behaviour, rect);
transition = clutter_property_transition_new ("position");
clutter_transition_set_from (transition, CLUTTER_TYPE_POINT, &start);
clutter_transition_set_to (transition, CLUTTER_TYPE_POINT, &end);
clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), -1);
clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE);
clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 3000);
bounce = transition;
g_signal_connect (stage,
"button-press-event", G_CALLBACK (clutter_main_quit),
@ -266,9 +283,5 @@ main (int argc, char *argv[])
clutter_main ();
clutter_threads_leave ();
g_object_unref (p_behaviour);
g_object_unref (r_behaviour);
g_object_unref (timeline);
return EXIT_SUCCESS;
}