#include <stdio.h> 
#include <stdlib.h> 
#include <X11/Xlib.h>
#include <X11/keysym.h>

typedef struct Xwin_t {
	Window win;
	int screen;
	GC gcontext;
	XGCValues gcv;
	unsigned long gcmask;
	Colormap cmap;
	
	void (*expose)();
	void (*buttonpress)(int,int,int);
	void (*keypress)(long);
} *Xwin;

extern void initWindows();
extern Xwin openWindow(int px, int py, int image_width, int image_height);
extern void setColor(Xwin xwin, unsigned char r, unsigned char v, unsigned char b);
extern void drawPoint(Xwin xwin, int x, int y);
extern void drawLine(Xwin xwin,int x1, int y1, int x2, int y2);
extern void drawRectangle(Xwin xwin, int x1, int y1, int l, int h);
extern void drawString(Xwin xwin, int posx, int posy, char *str);
extern void clearWindow(Xwin xwin);
extern void setExpose(Xwin xwin, void (*expose)());
extern void setButtonPress(Xwin xwin, void (*buttonpress)(int,int,int));
extern void setKeyPress(Xwin xwin, void (*keypress)(long));
extern void quitMainLoop();
extern void mainLoop();