docs: Add custom ClutterActor example which uses composition

2011-01-21 16:43:03 +00:00
parent b820e39406
commit 8a5967f0cc
4 changed files with 440 additions and 0 deletions
--- a/doc/cookbook/examples/actors-composite-main.c
+++ b/doc/cookbook/examples/actors-composite-main.c
@ -0,0 +1,79 @@
+#include <stdlib.h>
+#include "cb-button.h"
+
+/* colors */
+static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
+static const ClutterColor white_color = { 0xff, 0xff, 0xff, 0xff };
+static const ClutterColor yellow_color = { 0x88, 0x88, 0x00, 0xff };
+
+/* click handler */
+static void
+clicked (CbButton *button,
+         gpointer  data)
+{
+  const gchar *current_text;
+
+  g_debug ("Clicked");
+
+  current_text = cb_button_get_text (button);
+
+  if (g_strcmp0 (current_text, "winkle") == 0)
+    cb_button_set_text (button, "pickers");
+  else
+    cb_button_set_text (button, "winkle");
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  ClutterActor *stage;
+  ClutterActor *button;
+  ClutterConstraint *align_x_constraint;
+  ClutterConstraint *align_y_constraint;
+
+  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);
+  g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
+
+  button = cb_button_new ();
+  cb_button_set_text (CB_BUTTON (button), "winkle");
+
+  /* the following is equivalent to the two lines above:
+   *
+   *  button = g_object_new (CB_TYPE_BUTTON,
+   *                         "text", "winkle",
+   *                         NULL);
+   *
+   * because we defined a set_property function, which can accept
+   * a PROP_TEXT parameter, GObject can create a button and set one
+   * or more properties with a single call to g_object_new()
+   */
+
+  cb_button_set_text_color (CB_BUTTON (button), &white_color);
+  cb_button_set_background_color (CB_BUTTON (button), &yellow_color);
+  clutter_actor_set_size (button, 200, 100);
+  g_signal_connect (button, "clicked", G_CALLBACK (clicked), NULL);
+
+  align_x_constraint = clutter_align_constraint_new (stage,
+                                                     CLUTTER_ALIGN_X_AXIS,
+                                                     0.5);
+
+  align_y_constraint = clutter_align_constraint_new (stage,
+                                                     CLUTTER_ALIGN_Y_AXIS,
+                                                     0.5);
+
+  clutter_actor_add_constraint (button, align_x_constraint);
+  clutter_actor_add_constraint (button, align_y_constraint);
+
+  clutter_container_add_actor (CLUTTER_CONTAINER (stage), button);
+
+  clutter_actor_show (stage);
+
+  clutter_main ();
+
+  return EXIT_SUCCESS;
+}