mutter/tests/interactive/test-threads.c

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#include <stdio.h>
#include <stdlib.h>
#include <gmodule.h>
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#include <clutter/clutter.h>
typedef struct
{
ClutterActor *stage;
ClutterActor *label;
ClutterActor *progress;
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ClutterTimeline *timeline;
volatile gboolean cancelled;
} TestThreadData;
static TestThreadData *
test_thread_data_new (void)
{
TestThreadData *data;
data = g_new0 (TestThreadData, 1);
return data;
}
static void
test_thread_data_free (TestThreadData *data)
{
g_object_unref (data->progress);
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g_object_unref (data->label);
g_object_unref (data->stage);
g_object_unref (data->timeline);
g_free (data);
}
static gboolean
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");
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clutter_timeline_stop (data->timeline);
test_thread_data_free (data);
return FALSE;
}
static GStaticPrivate test_thread_data = G_STATIC_PRIVATE_INIT;
typedef struct
{
gint count;
TestThreadData *thread_data;
} TestUpdate;
static gboolean
update_label_idle (gpointer data)
{
TestUpdate *update = data;
guint width;
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gchar *text;
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);
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if (update->count == 0)
width = 0;
else if (update->count == 100)
width = 350;
else
width = (guint) (update->count / 100.0 * 350.0);
clutter_actor_set_width (update->thread_data->progress, width);
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g_free (text);
g_free (update);
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return FALSE;
}
static void
do_something_very_slow (void)
{
TestThreadData *data;
gint i;
data = (TestThreadData *) g_static_private_get (&test_thread_data);
if (data->cancelled)
return;
for (i = 0; i < 100; i++)
{
gint msecs;
msecs = 1 + (int) (100.0 * rand () / ((RAND_MAX + 1.0) / 3));
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/* sleep for a while */
g_usleep (msecs * 1000);
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if ((i % 10) == 0)
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{
TestUpdate *update;
update = g_new (TestUpdate, 1);
update->count = i;
update->thread_data = data;
clutter_threads_add_idle_full (G_PRIORITY_DEFAULT + 30,
update_label_idle,
update, NULL);
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}
}
}
static gpointer
test_thread_func (gpointer user_data)
{
TestThreadData *data;
data = user_data;
g_static_private_set (&test_thread_data, data, NULL);
do_something_very_slow ();
clutter_threads_add_idle_full (G_PRIORITY_DEFAULT + 30,
test_thread_done_idle,
data, NULL);
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return NULL;
}
static ClutterTimeline *timeline = NULL;
static ClutterActor *count_label = NULL;
static ClutterActor *help_label = NULL;
static ClutterActor *progress_rect = NULL;
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static gboolean
on_key_press_event (ClutterStage *stage,
ClutterEvent *event,
gpointer user_data)
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{
TestThreadData *data;
switch (clutter_event_get_key_symbol (event))
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{
case CLUTTER_KEY_s:
clutter_text_set_text (CLUTTER_TEXT (help_label), "Press 'q' to quit");
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clutter_timeline_start (timeline);
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);
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data->timeline = g_object_ref (timeline);
g_thread_create (test_thread_func, data, FALSE, NULL);
return TRUE;
case CLUTTER_KEY_q:
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clutter_main_quit ();
return TRUE;
default:
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break;
}
return FALSE;
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}
G_MODULE_EXPORT int
test_threads_main (int argc, char *argv[])
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{
ClutterActor *stage;
ClutterActor *rect;
ClutterBehaviour *r_behaviour, *p_behaviour;
ClutterAlpha *alpha;
const ClutterKnot knots[] = {
{ 75, 150 },
{ 400, 150 }
};
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g_thread_init (NULL);
clutter_threads_init ();
clutter_init (&argc, &argv);
stage = clutter_stage_new ();
clutter_stage_set_title (CLUTTER_STAGE (stage), "Threading");
clutter_stage_set_color (CLUTTER_STAGE (stage), CLUTTER_COLOR_Aluminium3);
clutter_actor_set_size (stage, 600, 300);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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count_label = clutter_text_new_with_text ("Mono 12", "Counter");
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clutter_actor_set_position (count_label, 350, 50);
help_label = clutter_text_new_with_text ("Mono 12", "Press 's' to start");
clutter_actor_set_position (help_label, 50, 50);
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rect = clutter_rectangle_new_with_color (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);
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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);
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clutter_container_add (CLUTTER_CONTAINER (stage),
count_label, help_label,
rect, progress_rect,
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NULL);
timeline = clutter_timeline_new (3000);
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clutter_timeline_set_loop (timeline, TRUE);
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);
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g_signal_connect (stage,
"button-press-event", G_CALLBACK (clutter_main_quit),
NULL);
g_signal_connect (stage,
"key-press-event", G_CALLBACK (on_key_press_event),
NULL);
clutter_actor_show (stage);
clutter_threads_enter ();
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clutter_main ();
clutter_threads_leave ();
g_object_unref (p_behaviour);
g_object_unref (r_behaviour);
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g_object_unref (timeline);
return EXIT_SUCCESS;
}