mirror of
https://github.com/brl/mutter.git
synced 2024-12-11 22:10:16 +00:00
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
137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
#include <stdlib.h>
|
|
#include <clutter/clutter.h>
|
|
|
|
#define STAGE_SIDE 400
|
|
#define RECTANGLE_SIDE STAGE_SIDE * 0.5
|
|
#define TEXTURE_SIZE_MAX STAGE_SIDE * 0.9
|
|
#define TEXTURE_SIZE_MIN STAGE_SIDE * 0.1
|
|
#define TEXTURE_SIZE_STEP 0.2
|
|
#define OVERLAY_OPACITY_OFF 0
|
|
#define OVERLAY_OPACITY_ON 100
|
|
|
|
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
|
|
static const ClutterColor overlay_color = { 0xaa, 0x99, 0x00, 0xff };
|
|
|
|
/* change the texture size with +/- */
|
|
static gboolean
|
|
key_press_cb (ClutterActor *actor,
|
|
ClutterEvent *event,
|
|
gpointer user_data)
|
|
{
|
|
ClutterActor *texture;
|
|
gfloat texture_width, texture_height;
|
|
guint key_pressed;
|
|
|
|
texture = CLUTTER_ACTOR (user_data);
|
|
clutter_actor_get_size (texture, &texture_width, &texture_height);
|
|
|
|
key_pressed = clutter_event_get_key_symbol (event);
|
|
|
|
if (key_pressed == CLUTTER_KEY_plus)
|
|
{
|
|
texture_width *= 1.0 + TEXTURE_SIZE_STEP;
|
|
texture_height *= 1.0 + TEXTURE_SIZE_STEP;
|
|
}
|
|
else if (key_pressed == CLUTTER_KEY_minus)
|
|
{
|
|
texture_width *= 1.0 - TEXTURE_SIZE_STEP;
|
|
texture_height *= 1.0 - TEXTURE_SIZE_STEP;
|
|
}
|
|
|
|
if (texture_width <= TEXTURE_SIZE_MAX && texture_width >= TEXTURE_SIZE_MIN)
|
|
clutter_actor_animate (texture, CLUTTER_EASE_OUT_CUBIC, 500,
|
|
"width", texture_width,
|
|
"height", texture_height,
|
|
NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* turn overlay opacity on/off */
|
|
static void
|
|
click_cb (ClutterClickAction *action,
|
|
ClutterActor *actor,
|
|
gpointer user_data)
|
|
{
|
|
ClutterActor *overlay = CLUTTER_ACTOR (user_data);
|
|
guint8 opacity = clutter_actor_get_opacity (overlay);
|
|
|
|
if (opacity < OVERLAY_OPACITY_ON)
|
|
opacity = OVERLAY_OPACITY_ON;
|
|
else
|
|
opacity = OVERLAY_OPACITY_OFF;
|
|
|
|
clutter_actor_set_opacity (overlay, opacity);
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
ClutterActor *stage;
|
|
ClutterActor *texture;
|
|
ClutterActor *overlay;
|
|
ClutterAction *click;
|
|
GError *error = NULL;
|
|
|
|
gchar *filename = TESTS_DATA_DIR "/redhand.png";
|
|
|
|
if (argc > 1)
|
|
filename = argv[1];
|
|
|
|
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
|
|
return 1;
|
|
|
|
stage = clutter_stage_new ();
|
|
clutter_actor_set_size (stage, STAGE_SIDE, STAGE_SIDE);
|
|
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
|
|
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
|
|
|
|
texture = clutter_texture_new ();
|
|
clutter_texture_set_keep_aspect_ratio (CLUTTER_TEXTURE (texture), TRUE);
|
|
clutter_actor_set_reactive (texture, TRUE);
|
|
clutter_actor_set_size (texture, RECTANGLE_SIDE, RECTANGLE_SIDE);
|
|
clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
|
|
clutter_actor_add_constraint (texture, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5));
|
|
|
|
clutter_texture_set_from_file (CLUTTER_TEXTURE (texture),
|
|
filename,
|
|
&error);
|
|
|
|
if (error != NULL)
|
|
{
|
|
g_warning ("Error loading %s\n%s", filename, error->message);
|
|
g_error_free (error);
|
|
exit (EXIT_FAILURE);
|
|
}
|
|
|
|
/* overlay is 10px wider and taller than the texture, and centered on it;
|
|
* initially, it is transparent; but it is made semi-opaque when the
|
|
* texture is clicked
|
|
*/
|
|
overlay = clutter_rectangle_new_with_color (&overlay_color);
|
|
clutter_actor_set_opacity (overlay, OVERLAY_OPACITY_OFF);
|
|
clutter_actor_add_constraint (overlay, clutter_bind_constraint_new (texture, CLUTTER_BIND_WIDTH, 10));
|
|
clutter_actor_add_constraint (overlay, clutter_bind_constraint_new (texture, CLUTTER_BIND_HEIGHT, 10));
|
|
clutter_actor_add_constraint (overlay, clutter_align_constraint_new (texture, CLUTTER_ALIGN_X_AXIS, 0.5));
|
|
clutter_actor_add_constraint (overlay, clutter_align_constraint_new (texture, CLUTTER_ALIGN_Y_AXIS, 0.5));
|
|
|
|
click = clutter_click_action_new ();
|
|
clutter_actor_add_action (texture, click);
|
|
|
|
clutter_container_add (CLUTTER_CONTAINER (stage), texture, overlay, NULL);
|
|
clutter_actor_raise_top (overlay);
|
|
|
|
g_signal_connect (click, "clicked", G_CALLBACK (click_cb), overlay);
|
|
|
|
g_signal_connect (stage,
|
|
"key-press-event",
|
|
G_CALLBACK (key_press_cb),
|
|
texture);
|
|
|
|
clutter_actor_show (stage);
|
|
|
|
clutter_main ();
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|