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cookbook: Added simple pointer motion example

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Added a simple pointer motion example which just reports on
the stage and actor-relative coordinates of the pointer
as it moves.
This commit is contained in:
Elliot Smith 2010-08-19 17:17:58 +01:00
parent 7c196d31b4
commit c1e2658104
2 changed files with 60 additions and 2 deletions
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6
doc/cookbook/examples/Makefile.am
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@ -11,8 +11,9 @@ noinst_PROGRAMS = \
layouts-stacking \
layouts-stacking-diff-sized-actors \
events-mouse-scroll \
events-pointer-motion-crossing \
events-pointer-motion-scribbler \
events-pointer-motion \
events-pointer-motion-crossing \
events-pointer-motion-scribbler \
$(NULL)
INCLUDES = \
@ -42,6 +43,7 @@ textures_sub_texture_SOURCES = textures-sub-texture.c
layouts_stacking_SOURCES = layouts-stacking.c
layouts_stacking_diff_sized_actors_SOURCES = layouts-stacking-diff-sized-actors.c
events_mouse_scroll_SOURCES = events-mouse-scroll.c
events_pointer_motion_SOURCES = events-pointer-motion.c
events_pointer_motion_crossing_SOURCES = events-pointer-motion-crossing.c
events_pointer_motion_scribbler_SOURCES = events-pointer-motion-scribbler.c

56
doc/cookbook/examples/events-pointer-motion.c Normal file
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@ -0,0 +1,56 @@
#include <clutter/clutter.h>
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
static const ClutterColor rectangle_color = { 0xaa, 0x99, 0x00, 0xff };
static gboolean
_pointer_moved_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
ClutterMotionEvent *motion_event = (ClutterMotionEvent *)event;
gfloat stage_x = motion_event->x;
gfloat stage_y = motion_event->y;
gfloat actor_x, actor_y;
clutter_actor_transform_stage_point (actor,
stage_x, stage_y,
&actor_x, &actor_y);
g_debug ("pointer @ stage x %.0f, y %.0f; actor x %.0f, y %.0f",
stage_x, stage_y,
actor_x, actor_y);
return TRUE;
}
int
main (int argc, char *argv[])
{
ClutterActor *stage;
ClutterActor *rectangle;
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
clutter_actor_set_size (stage, 400, 400);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
rectangle = clutter_rectangle_new_with_color (&rectangle_color);
clutter_actor_set_size (rectangle, 300, 300);
clutter_actor_set_position (rectangle, 50, 50);
clutter_actor_set_reactive (rectangle, TRUE);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), rectangle);
g_signal_connect (rectangle,
"motion-event",
G_CALLBACK (_pointer_moved_cb),
NULL);
clutter_actor_show (stage);
clutter_main ();
return 0;
}