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aece642adb
Make sure users get the idea that clutter_init()
has a return value that needs to be checked.
These were fixed via sed magic:
sed -i -s -e "s/clutter_init (.*)/\
if (& != CLUTTER_INIT_SUCCESS)\n return 1/"\
doc/*/*/*.{c,xml} doc/*/*.xml
http://bugzilla.clutter-project.org/show_bug.cgi?id=2574
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
#include <stdlib.h>
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#include <clutter/clutter.h>
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typedef struct {
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ClutterActor *red;
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ClutterActor *green;
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ClutterTimeline *timeline;
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} State;
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static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
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static const ClutterColor red_color = { 0xff, 0x00, 0x00, 0xff };
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static const ClutterColor green_color = { 0x00, 0xff, 0x00, 0xff };
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static void
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reverse_timeline (ClutterTimeline *timeline)
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{
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ClutterTimelineDirection dir = clutter_timeline_get_direction (timeline);
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if (dir == CLUTTER_TIMELINE_FORWARD)
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dir = CLUTTER_TIMELINE_BACKWARD;
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else
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dir = CLUTTER_TIMELINE_FORWARD;
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clutter_timeline_set_direction (timeline, dir);
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}
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/* a key press either starts the timeline or reverses it */
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static gboolean
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key_pressed_cb (ClutterActor *actor,
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ClutterEvent *event,
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gpointer user_data)
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{
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State *state = (State *) user_data;
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if (clutter_timeline_is_playing (state->timeline))
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reverse_timeline (state->timeline);
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else
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clutter_timeline_start (state->timeline);
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return TRUE;
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}
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int
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main (int argc,
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char *argv[])
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{
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State *state = g_new0 (State, 1);
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ClutterActor *stage;
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ClutterAnimator *animator;
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if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
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return 1;
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stage = clutter_stage_new ();
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clutter_actor_set_size (stage, 400, 400);
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clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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state->red = clutter_rectangle_new_with_color (&red_color);
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clutter_actor_set_size (state->red, 100, 100);
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clutter_actor_set_position (state->red, 300, 300);
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state->green = clutter_rectangle_new_with_color (&green_color);
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clutter_actor_set_size (state->green, 100, 100);
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clutter_actor_set_position (state->green, 0, 0);
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animator = clutter_animator_new ();
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clutter_animator_set_duration (animator, 1000);
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clutter_animator_set (animator,
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state->red, "x", CLUTTER_LINEAR, 0.0, 300.0,
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state->red, "y", CLUTTER_LINEAR, 0.0, 300.0,
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state->red, "x", CLUTTER_LINEAR, 1.0, 0.0,
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state->red, "y", CLUTTER_EASE_IN_QUINT, 1.0, 0.0,
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NULL);
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clutter_animator_set (animator,
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state->green, "x", CLUTTER_LINEAR, 0.0, 0.0,
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state->green, "y", CLUTTER_LINEAR, 0.0, 0.0,
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state->green, "x", CLUTTER_LINEAR, 1.0, 300.0,
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state->green, "y", CLUTTER_EASE_IN_QUINT, 1.0, 300.0,
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NULL);
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state->timeline = clutter_animator_get_timeline (animator);
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clutter_timeline_set_auto_reverse (state->timeline, TRUE);
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g_signal_connect (stage,
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"key-press-event",
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G_CALLBACK (key_pressed_cb),
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state);
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clutter_container_add (CLUTTER_CONTAINER (stage), state->red, state->green, NULL);
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clutter_actor_show (stage);
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clutter_main ();
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g_object_unref (animator);
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g_free (state);
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return EXIT_SUCCESS;
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}
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