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https://github.com/brl/mutter.git
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134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
#include <stdlib.h>
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#include <gmodule.h>
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#include <clutter/clutter.h>
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#define PATH_DESCRIPTION \
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"M 0, 0 " \
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"L 0, 300 " \
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"L 300, 300 " \
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"L 300, 0 " \
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"L 0, 0"
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static gboolean toggled = FALSE;
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static gboolean
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on_button_press (ClutterActor *actor,
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const ClutterEvent *event,
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gpointer dummy G_GNUC_UNUSED)
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{
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if (!toggled)
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clutter_actor_animate (actor, CLUTTER_EASE_OUT_CUBIC, 500,
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"@constraints.path.offset", 1.0,
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NULL);
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else
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clutter_actor_animate (actor, CLUTTER_EASE_OUT_CUBIC, 500,
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"@constraints.path.offset", 0.0,
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NULL);
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toggled = !toggled;
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return TRUE;
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}
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static gchar *
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node_to_string (const ClutterPathNode *node)
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{
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GString *buffer = g_string_sized_new (256);
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gsize len = 0, i;
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switch (node->type)
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{
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case CLUTTER_PATH_MOVE_TO:
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g_string_append (buffer, "move-to ");
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len = 1;
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break;
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case CLUTTER_PATH_LINE_TO:
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g_string_append (buffer, "line-to ");
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len = 1;
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break;
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case CLUTTER_PATH_CURVE_TO:
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g_string_append (buffer, "curve-to ");
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len = 3;
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break;
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case CLUTTER_PATH_CLOSE:
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g_string_append (buffer, "close");
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len = 0;
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break;
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default:
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break;
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}
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for (i = 0; i < len; i++)
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{
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if (i == 0)
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g_string_append (buffer, "[ ");
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g_string_append_printf (buffer, "[ %d, %d ]",
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node->points[i].x,
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node->points[i].y);
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if (i == len - 1)
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g_string_append (buffer, " ]");
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}
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return g_string_free (buffer, FALSE);
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}
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static void
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on_node_reached (ClutterPathConstraint *constraint,
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ClutterActor *actor,
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guint index_)
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{
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ClutterPath *path = clutter_path_constraint_get_path (constraint);
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ClutterPathNode node;
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gchar *str;
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clutter_path_get_node (path, index_, &node);
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str = node_to_string (&node);
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g_print ("Node %d reached: %s\n", index_, str);
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g_free (str);
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}
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G_MODULE_EXPORT int
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test_path_constraint_main (int argc,
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char *argv[])
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{
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ClutterActor *stage, *rect;
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ClutterPath *path;
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ClutterColor rect_color = { 0xcc, 0x00, 0x00, 0xff };
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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_stage_set_title (CLUTTER_STAGE (stage), "Path Constraint");
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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path = clutter_path_new ();
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clutter_path_set_description (path, PATH_DESCRIPTION);
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rect = clutter_rectangle_new ();
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clutter_rectangle_set_color (CLUTTER_RECTANGLE (rect), &rect_color);
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clutter_actor_set_size (rect, 128, 128);
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clutter_actor_set_reactive (rect, TRUE);
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clutter_actor_add_constraint_with_name (rect, "path", clutter_path_constraint_new (path, 0.0));
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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g_signal_connect (rect, "button-press-event", G_CALLBACK (on_button_press), NULL);
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g_signal_connect (clutter_actor_get_constraint (rect, "path"),
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"node-reached",
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G_CALLBACK (on_node_reached),
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NULL);
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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