#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,	EHide,	EImage,	ELight,	EMask,	ERect,	EReveal,	EShow,	ESize,	EValue,}; static char *cmds[] = {	[EAlign] = 		"align",	[EBorder] = 	"border",	[EBordercolor] = "bordercolor",	[EFocus] = 	"focus",	[EFormat] = 	"format",	[EHide] =		"hide",	[EImage] =	"image",	[ELight] =		"light",	[EMask] =		"mask",	[ERect] =		"rect",	[EReveal] =	"reveal",	[EShow] =		"show",	[ESize] =		"size",	[EValue] =		"value",	nil}; static voidbuttonfree(Control *c){	Button *b; 	b = (Button *)c;	_putctlimage(b->image);	_putctlimage(b->mask);	_putctlimage(b->light);	_putctlimage(b->bordercolor);} static voidbuttonshow(Button *b){	Rectangle r; 	if (b->hidden)		return;	r = b->rect;	if(b->border > 0){		border(b->screen, r, b->border, b->bordercolor->image, ZP);		r = insetrect(b->rect, b->border);	}	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 voidbuttonmouse(Control *c, Mouse *m){	Button *b; 	b = (Button*)c; 	if((m->buttons&7) != b->lastbut){		if(m->buttons & 7){			if (b->pressed)				b->pressed = 0;			else				b->pressed = m->buttons & 7;			buttonshow(b);		}else	/* generate event on button up */			chanprint(b->event, b->format, b->name, b->pressed);	}	b->lastbut = m->buttons & 7;} static voidbuttonctl(Control *c, CParse *cp){	int cmd;	Rectangle r;	Button *b; 	b = (Button*)c;	cmd = _ctllookup(cp->args[0], cmds, nelem(cmds));	switch(cmd){	default:		ctlerror("%q: unrecognized message '%s'", b->name, cp->str);		break;	case EAlign:		_ctlargcount(b, cp, 2);		b->align = _ctlalignment(cp->args[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 EHide:		_ctlargcount(b, cp, 1);		b->hidden = 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 EReveal:		_ctlargcount(b, cp, 1);		b->hidden = 0;		buttonshow(b);		break;	case EShow:		_ctlargcount(b, cp, 1);		buttonshow(b);		break;	case ESize:		if (cp->nargs == 3)			r.max = Pt(0x7fffffff, 0x7fffffff);		else{			_ctlargcount(b, cp, 5);			r.max.x = cp->iargs[3];			r.max.y = cp->iargs[4];		}		r.min.x = cp->iargs[1];		r.min.y = cp->iargs[2];		if(r.min.x<=0 || r.min.y<=0 || r.max.x<=0 || r.max.y<=0 || r.max.x < r.min.x || r.max.y < r.min.y)			ctlerror("%q: bad sizes: %s", b->name, cp->str);		b->size.min = r.min;		b->size.max = r.max;		break;	case EValue:		_ctlargcount(b, cp, 2);		if((cp->iargs[1]!=0) != b->pressed){			b->pressed ^= 1;			buttonshow(b);		}		break;	}} Control*createbutton(Controlset *cs, char *name){	Button *b;	b = (Button*)_createctl(cs, "button", sizeof(Button), name);	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;	b->ctl = buttonctl;	b->mouse = buttonmouse;	b->key = nil;	b->exit = buttonfree;	return (Control*)b;}