mirror of
https://github.com/brl/mutter.git
synced 2024-12-26 12:52:14 +00:00
26aa4b5290
A lot of the example code in the cookbook and the API reference still uses the default stage — sometimes as if it were a non-default one, which once again demonstrates how the default stage was a flawed concept that just confused people.
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/*
|
|
* Testing what happens with a stack of actors and pointer events
|
|
* red and green are reactive; blue is not
|
|
*
|
|
* when the pointer is over green (even if green is obscured by blue)
|
|
* signals are emitted by green (not by blue);
|
|
*
|
|
* but when the pointer is over the overlap between red and green,
|
|
* signals are emitted by green
|
|
*
|
|
* gcc -g -O0 -o stacked-actors-and-events stacked-actors-and-events.c `pkg-config --libs --cflags clutter-1.0 glib-2.0` -lm
|
|
*/
|
|
#include <clutter/clutter.h>
|
|
|
|
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
|
|
static const ClutterColor red = { 0xff, 0x00, 0x00, 0xff };
|
|
static const ClutterColor green = { 0x00, 0xff, 0x00, 0xff };
|
|
static const ClutterColor blue = { 0x00, 0x00, 0xff, 0xff };
|
|
|
|
static gboolean
|
|
_pointer_motion_cb (ClutterActor *actor,
|
|
ClutterEvent *event,
|
|
gpointer user_data)
|
|
{
|
|
gfloat stage_x, stage_y;
|
|
gfloat actor_x, actor_y;
|
|
|
|
/* get the coordinates where the pointer crossed into the actor */
|
|
clutter_event_get_coords (event, &stage_x, &stage_y);
|
|
|
|
/*
|
|
* as the coordinates are relative to the stage, rather than
|
|
* the actor which emitted the signal, it can be useful to
|
|
* transform them to actor-relative coordinates
|
|
*/
|
|
clutter_actor_transform_stage_point (actor,
|
|
stage_x, stage_y,
|
|
&actor_x, &actor_y);
|
|
|
|
g_debug ("pointer on actor %s @ x %.0f, y %.0f",
|
|
clutter_actor_get_name (actor),
|
|
actor_x, actor_y);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
ClutterActor *stage;
|
|
ClutterActor *r1, *r2, *r3;
|
|
|
|
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
|
|
return 1;
|
|
|
|
stage = clutter_stage_new ();
|
|
clutter_actor_set_size (stage, 300, 300);
|
|
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
|
|
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
|
|
|
|
r1 = clutter_rectangle_new_with_color (&red);
|
|
clutter_actor_set_size (r1, 150, 150);
|
|
clutter_actor_add_constraint (r1, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.25));
|
|
clutter_actor_add_constraint (r1, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.25));
|
|
clutter_actor_set_reactive (r1, TRUE);
|
|
clutter_actor_set_name (r1, "red");
|
|
|
|
r2 = clutter_rectangle_new_with_color (&green);
|
|
clutter_actor_set_size (r2, 150, 150);
|
|
clutter_actor_add_constraint (r2, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5));
|
|
clutter_actor_add_constraint (r2, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5));
|
|
clutter_actor_set_reactive (r2, TRUE);
|
|
clutter_actor_set_depth (r2, -100);
|
|
clutter_actor_set_name (r2, "green");
|
|
|
|
r3 = clutter_rectangle_new_with_color (&blue);
|
|
clutter_actor_set_size (r3, 150, 150);
|
|
clutter_actor_add_constraint (r3, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.75));
|
|
clutter_actor_add_constraint (r3, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.75));
|
|
clutter_actor_set_opacity (r3, 125);
|
|
clutter_actor_set_name (r3, "blue");
|
|
|
|
clutter_container_add (CLUTTER_CONTAINER (stage), r1, r2, r3, NULL);
|
|
|
|
g_signal_connect (r1, "motion-event", G_CALLBACK (_pointer_motion_cb), NULL);
|
|
g_signal_connect (r2, "motion-event", G_CALLBACK (_pointer_motion_cb), NULL);
|
|
|
|
clutter_actor_show (stage);
|
|
|
|
clutter_main ();
|
|
|
|
return 0;
|
|
}
|