collections {
   group {
      name: "test";

      parts {
        part {
                name:   "button";
                type:   RECT;
                mouse_events, 1;

                description {
                        state, "default" 0.0;
                        min, 100 50;
                        max, 100 50;
                        align, 0.5 0.5;

                        color: 255 0 0 255;

                        rel1 {
                                relative, 0.0 0.0;
                                offset, 0 0;
                        }
                        rel2 {
                                relative, 1.0 1.0;
                                offset, -1 -1;
                        }
                }
                description {
                        state, "clicked" 0.0;
                        min, 100 50;
                        max, 100 50;
                        align, 0.5 0.5;

                        color, 170 89 214 255;

                        rel1 {
                                relative, 0.0 0.0;
                                offset, 0 0;
                        }
                        rel2 {
                                relative, 1.0 1.0;
                                offset, -1 -1;
                        }
                }
        }
      }
      programs {
        program {
                name: "button_click";
                signal: "mouse,down,1";
                source: "button";
                action, STATE_SET "clicked" 0.0;
                target: "button";
        }
      }
}