#include <u.h>#include <libc.h>#include <draw.h>#include <thread.h>#include <mouse.h>#include <keyboard.h>#include <control.h> typedef struct Button Button; struct Button{	Control;	CImage	*image;	CImage	*mask;	CImage	*light;	CImage	*bordercolor;	int		pressed;	int		lastbut;	int		lastshow;	int		border;	int		align;}; enum{	EAlign,	EBorder,	EBordercolor,	EFocus,	EFormat,	EImage,	ELight,	EMask,	ERect,	EShow,	EValue,}; static char *cmds[] = {	[EAlign] = 		"align",	[EBorder] = 	"border",	[EBordercolor] = "bordercolor",	[EFocus] = 	"focus",	[EFormat] = 	"format",	[EImage] =	"image",	[ELight] =		"light",	[EMask] =		"mask",	[ERect] =		"rect",	[EShow] =		"show",	[EValue] =		"value",	nil}; static void	buttonctl(Control*, char*);static void	buttonshow(Button*);static void	buttonfree(Button*); static voidbuttonthread(void *v){	char buf[32];	Button *b; 	b = v; 	snprint(buf, sizeof buf, "button-%s-0x%p", b->name, b);	threadsetname(buf); 	b->image = _getctlimage("white");	b->mask = _getctlimage("opaque");	b->light = _getctlimage("yellow");	b->bordercolor = _getctlimage("black");	b->format = ctlstrdup("%q: value %d");	b->lastshow = -1;	b->border = 0;	b->align = Aupperleft; 	for(;;){		switch(alt(b->alts)){		default:			ctlerror("%q: unknown message", b->name);		case AKey:			/* ignore keystrokes */			break;		case AMouse:			if((b->m.buttons&1) != b->lastbut){				if(b->m.buttons & 1){					b->pressed ^= 1;					buttonshow(b);					printctl(b->event, b->format, b->name, b->pressed);				}			}			b->lastbut = b->m.buttons & 1;			break;		case ACtl:			_ctlcontrol(b, b->str, buttonctl);			free(b->str);			break;		case AWire:			_ctlrewire(b);			break;		case AExit:			buttonfree(b);			sendul(b->exit, 0);			return;		}	}} Control*createbutton(Controlset *cs, char *name){	return _createctl(cs, "button", sizeof(Button), name, buttonthread, 0);} static voidbuttonfree(Button *b){	_putctlimage(b->image);	_putctlimage(b->mask);	_putctlimage(b->light);	_putctlimage(b->bordercolor);} static voidbuttonshow(Button *b){	Rectangle r; 	r = b->rect;	if(b->border > 0){		border(b->screen, r, b->border, b->bordercolor->image, ZP);		r = insetrect(b->rect, b->border);	}	if(b->lastshow != b->pressed){		draw(b->screen, r, b->image->image, nil, b->image->image->r.min);		if(b->pressed)			draw(b->screen, r, b->light->image, b->mask->image, b->mask->image->r.min);		b->lastshow = b->pressed;		flushimage(display, 1);	}} static voidbuttonctl(Control *c, char *str){	int cmd;	CParse cp;	Rectangle r;	Button *b; 	b = (Button*)c;	cmd = _ctlparse(&cp, str, cmds);	switch(cmd){	default:		ctlerror("%q: unrecognized message '%s'", b->name, cp.str);		break;	case EAlign:		_ctlargcount(b, &cp, 2);		b->align = cp.iargs[1];		b->lastshow = -1;	/* force redraw */		break;	case EBorder:		_ctlargcount(b, &cp, 2);		b->border = cp.iargs[1];		b->lastshow = -1;	/* force redraw */		break;	case EBordercolor:		_ctlargcount(b, &cp, 2);		_setctlimage(b, &b->bordercolor, cp.args[1]);		b->lastshow = -1;	/* force redraw */		break;	case EFocus:		/* ignore focus change */		break;	case EFormat:		_ctlargcount(b, &cp, 2);		b->format = ctlstrdup(cp.args[1]);		break;	case EImage:		_ctlargcount(b, &cp, 2);		_setctlimage(b, &b->image, cp.args[1]);		b->lastshow = -1;	/* force redraw */		break;	case ELight:		_ctlargcount(b, &cp, 2);		_setctlimage(b, &b->light, cp.args[1]);		b->lastshow = -1;	/* force redraw */		break;	case EMask:		_ctlargcount(b, &cp, 2);		_setctlimage(b, &b->mask, cp.args[1]);		b->lastshow = -1;	/* force redraw */		break;	case ERect:		_ctlargcount(b, &cp, 5);		r.min.x = cp.iargs[1];		r.min.y = cp.iargs[2];		r.max.x = cp.iargs[3];		r.max.y = cp.iargs[4];		if(Dx(r)<0 || Dy(r)<0)			ctlerror("%q: bad rectangle: %s", b->name, cp.str);		b->rect = r;		b->lastshow = -1;	/* force redraw */		break;	case EShow:		_ctlargcount(b, &cp, 1);		buttonshow(b);		break;	case EValue:		_ctlargcount(b, &cp, 2);		if((cp.iargs[1]!=0) != b->pressed){			b->pressed ^= 1;			buttonshow(b);		}		break;	}}