#ifndef _canvas_
#define _canvas_

extern canvastype nullcanvas;

extern canvastype new_canvas(canvastype parentcv);
extern void map_canvas(canvastype cv);
extern void unmap_canvas(canvastype cv);
extern void reshape_canvas(canvastype cv);
extern void move_canvas(canvastype cv, float x, float y);
extern void totop_canvas(canvastype cv);
extern void tobottom_canvas(canvastype cv);

#endif