/usr/share/clutter-1.0/cookbook/examples/events-buttons-lasso.c is in libclutter-1.0-doc 1.24.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | /* Simple rectangle drawing using button and pointer events;
* click, drag and release a mouse button to draw a rectangle
*/
#include <stdlib.h>
#include <clutter/clutter.h>
static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
static const ClutterColor lasso_color = { 0xaa, 0xaa, 0xaa, 0x33 };
typedef struct
{
ClutterActor *actor;
gfloat x;
gfloat y;
} Lasso;
static guint
random_color_component ()
{
return (guint) (155 + (100.0 * rand () / (RAND_MAX + 1.0)));
}
static gboolean
button_pressed_cb (ClutterActor *actor,
ClutterEvent *event,
gpointer user_data)
{
Lasso *lasso = (Lasso *) user_data;
/* start drawing the lasso actor */
lasso->actor = clutter_rectangle_new_with_color (&lasso_color);
/* store lasso's start coordinates */
clutter_event_get_coords (event, &(lasso->x), &(lasso->y));
clutter_container_add_actor (CLUTTER_CONTAINER (actor), lasso->actor);
return TRUE;
}
static gboolean
button_released_cb (ClutterActor *stage,
ClutterEvent *event,
gpointer user_data)
{
Lasso *lasso = (Lasso *) user_data;
ClutterActor *rectangle;
ClutterColor *random_color;
gfloat x;
gfloat y;
gfloat width;
gfloat height;
if (lasso->actor == NULL)
return TRUE;
/* create a new rectangle */
random_color = clutter_color_new (random_color_component (),
random_color_component (),
random_color_component (),
random_color_component ());
rectangle = clutter_rectangle_new_with_color (random_color);
/* set the rectangle to the same size and shape as the lasso */
clutter_actor_get_position (lasso->actor, &x, &y);
clutter_actor_get_size (lasso->actor, &width, &height);
clutter_actor_set_position (rectangle, x, y);
clutter_actor_set_size (rectangle, width, height);
clutter_container_add_actor (CLUTTER_CONTAINER (stage), rectangle);
/* clear up the lasso actor */
clutter_actor_destroy (lasso->actor);
lasso->actor = NULL;
clutter_actor_queue_redraw (stage);
return TRUE;
}
static gboolean
pointer_motion_cb (ClutterActor *stage,
ClutterEvent *event,
gpointer user_data)
{
gfloat pointer_x;
gfloat pointer_y;
gfloat new_x;
gfloat new_y;
gfloat width;
gfloat height;
Lasso *lasso = (Lasso *) user_data;
if (lasso->actor == NULL)
return TRUE;
/* redraw the lasso actor */
clutter_event_get_coords (event, &pointer_x, &pointer_y);
new_x = MIN (pointer_x, lasso->x);
new_y = MIN (pointer_y, lasso->y);
width = MAX (pointer_x, lasso->x) - new_x;
height = MAX (pointer_y, lasso->y) - new_y;
clutter_actor_set_position (lasso->actor, new_x, new_y);
clutter_actor_set_size (lasso->actor, width, height);
return TRUE;
}
int
main (int argc,
char *argv[])
{
Lasso *lasso = g_new0 (Lasso, 1);
ClutterActor *stage;
/* seed random number generator */
srand ((unsigned int) time (NULL));
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return 1;
stage = clutter_stage_new ();
clutter_actor_set_size (stage, 320, 240);
clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
g_signal_connect (stage,
"button-press-event",
G_CALLBACK (button_pressed_cb),
lasso);
g_signal_connect (stage,
"button-release-event",
G_CALLBACK (button_released_cb),
lasso);
g_signal_connect (stage,
"motion-event",
G_CALLBACK (pointer_motion_cb),
lasso);
clutter_actor_show (stage);
clutter_main ();
g_free (lasso);
return EXIT_SUCCESS;
}
|