#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <panel.h>
#include "pldefs.h"
typedef struct Canvas Canvas;
struct Canvas{
       void (*draw)(Panel *);
       void (*hit)(Panel *, Mouse *);
};
void pl_drawcanvas(Panel *p){
       Canvas *c;
       c=p->data;
       if(c->draw) c->draw(p);
}
int pl_hitcanvas(Panel *p, Mouse *m){
       Canvas *c;
       c=p->data;
       if(c->hit) c->hit(p, m);
       return 0;
}
void pl_typecanvas(Panel *p, Rune c){
       USED(p, c);
}
Point pl_getsizecanvas(Panel *p, Point children){
       USED(p, children);
       return Pt(0,0);
}
void pl_childspacecanvas(Panel *p, Point *ul, Point *size){
       USED(p, ul, size);
}
void plinitcanvas(Panel *v, int flags, void (*draw)(Panel *), void (*hit)(Panel *, Mouse *)){
       Canvas *c;
       v->flags=flags|LEAF;
       v->draw=pl_drawcanvas;
       v->hit=pl_hitcanvas;
       v->type=pl_typecanvas;
       v->getsize=pl_getsizecanvas;
       v->childspace=pl_childspacecanvas;
       v->kind="canvas";
       c=v->data;
       c->draw=draw;
       c->hit=hit;
}
Panel *plcanvas(Panel *parent, int flags, void (*draw)(Panel *), void (*hit)(Panel *, Mouse *)){
       Panel *p;
       p=pl_newpanel(parent, sizeof(Canvas));
       plinitcanvas(p, flags, draw, hit);
       return p;
}