User can switch components. - component_manager will change domview._scenes_node and domview._layers_parent for switching component and timeline. - domview relys on domview._scenes_node and domview._layers_parent to find scene nodes and layers.

#ifndef _APP_H
#define _APP_H
typedef struct {
	mb_animated_menu_t *m;
}MyAppData;

extern void MyApp_InitContent(mbaf_t *app,int argc, char *argv[]);

void myselect_callback(mb_animated_menu_t *m, int select);
#endif