resizable.h

#pragma once
 
#include <cgv/signal/signal.h>
#include <cgv/signal/abst_signal.h>
 
#include "lib_begin.h"
 
namespace cgv {
    namespace gui {
 
        // abstract class to define an element that can change its size
        // and position
        class CGV_API resizable {
        public:
            // get the position of the element
            virtual void get_position(int &pos_x, int &pos_y) = 0;
            // get the extents of an element
            virtual void get_extents(int &width, int &height) = 0;
 
            // set the position
            void set_position(int pos_x, int pos_y);
 
            // set the dimensions
            void set_extents(int width, int height);
 
            // signal other elements can connect to if they are
            // interested in size or position changes that come 
            // from the outside
            cgv::signal::signal<resizable&> extents_position_change;
 
        protected:
            // method for changing the size of the element
            virtual void set_extents_request(int width, int height) = 0;
 
            // method for changing the position of the element
            virtual void set_position_request(int pos_x, int pos_y) = 0;
        };
 
    }
}
 
#include <cgv/config/lib_end.h>