#include "u.h"#include "../port/lib.h"#include "mem.h"#include "dat.h"#include "fns.h"#include "../port/error.h"#include "io.h" #define	Image	IMAGE#include <draw.h>#include <memdraw.h>#include <cursor.h>#include "screen.h" enum {	Button1 = 0x1;	Button2 = 0x2;	Button3 = 0x4;}; int		buttons;Point	position; static voidmousevent(void) {	static int		curbuttons;	static Point	curposition; 	if (buttons == curbuttons && eqpt(position, curposition))		return; 	/* generate a mouse event */	curbuttons = buttons;	curposition = position;} voidbuttonevent(int event) {	switch (event) {	case 0x02:		/* Button 2 down */		buttons |= Button2;		mousevent();		break;	case 0x82:		/* Button 2 up */		buttons &= ~Button2;		mousevent();		break;	case 0x03:		/* Button 3 down */		buttons |= Button3;		mousevent();		break;	case 0x83:		/* Button 3 up */		buttons &= ~Button3;		mousevent();		break;	default:		/* other buttons */	}}