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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
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/* Example of using a custom CbPageFoldEffect to do
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* an animated fold of a texture containing an image
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*
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* Pass the full path to the image on the command line;
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* click on the texture to trigger the folding animation
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*/
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#include <stdlib.h>
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#include <clutter/clutter.h>
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#include "cb-page-fold-effect.h"
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static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
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static gboolean
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button_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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ClutterState *transitions = CLUTTER_STATE (user_data);
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if (g_strcmp0 (clutter_state_get_state (transitions), "folded") == 0)
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clutter_state_set_state (transitions, "unfolded");
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else
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clutter_state_set_state (transitions, "folded");
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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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ClutterActor *stage;
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ClutterActor *texture;
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ClutterEffect *effect;
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ClutterState *transitions;
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GError *error = NULL;
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gchar *filename;
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if (argc < 2)
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{
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g_print ("Usage: %s <path to image file>\n", argv[0]);
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return EXIT_FAILURE;
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}
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filename = argv[1];
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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, 300);
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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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texture = clutter_texture_new ();
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clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (texture), TRUE);
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clutter_actor_set_width (texture, 400);
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clutter_actor_set_reactive (texture, TRUE);
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clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
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filename,
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&error);
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if (error != NULL)
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{
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g_critical ("Error loading texture from file %s; error was:\n%s",
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filename,
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error->message);
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return EXIT_FAILURE;
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}
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/* create the page fold effect instance with destination fold angle
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* of 180 degrees and starting period of 0 (no folding)
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*/
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effect = cb_page_fold_effect_new (180.0, 0.0);
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/* add the effect to the texture actor */
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clutter_actor_add_effect (texture, effect);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), texture);
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/* animation for the period property of the effect,
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* to animate its value between 0.0 and 1.0 and back
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*/
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transitions = clutter_state_new ();
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clutter_state_set_duration (transitions, NULL, NULL, 500);
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clutter_state_set_duration (transitions,
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"partially-folded",
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"folded",
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375);
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clutter_state_set (transitions, NULL, "folded",
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effect, "period", CLUTTER_LINEAR, 1.0,
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NULL);
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clutter_state_set (transitions, NULL, "partially-folded",
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effect, "period", CLUTTER_LINEAR, 0.25,
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NULL);
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clutter_state_set (transitions, NULL, "unfolded",
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effect, "period", CLUTTER_LINEAR, 0.0,
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NULL);
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clutter_state_warp_to_state (transitions, "partially-folded");
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g_signal_connect (texture,
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"button-press-event",
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G_CALLBACK (button_pressed_cb),
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transitions);
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clutter_actor_show (stage);
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clutter_main ();
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g_object_unref (transitions);
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return EXIT_SUCCESS;
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}
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