shithub: widget

ref: 5409ad54228242e20aed847acba4d10582b1191c
dir: /libwidget/base.c/

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <thread.h>
#include <mouse.h>
#include <keyboard.h>
#include <String.h>

#include <widget.h>
#include "w-internal.h"

void (*werror)(char*, ...) = sysfatal;

int
nextid(void)
{
	static int curid;
	return curid++;
}

void
widgetmain(Widgetctl* ctl)
{
	Mouse mouse;
	Rune rune;

	Alt chans[] =
	{
		{ ctl->mouse->c,		&mouse,	CHANRCV },
		{ ctl->kbd->c,			&rune,	CHANRCV },

		{ nil,					nil,	CHANEND }
	};

	enum
	{
		MOUSE, KEYBOARD
	};

	for(;;)
	{
		while(ctl->root == nil)
			yield();

		switch(alt(chans))
		{
		case MOUSE:
			mouseevent(ctl->root, ctl->image, ctl->image->r, mouse, ctl->c);
			break;
		case KEYBOARD:
			kbdevent(ctl->root, ctl->image, ctl->image->r, rune, ctl->c);
			break;
		}
		flushimage(ctl->image->display, 1);
	}
}

Widgetctl*
initwidget(Image *img, Keyboardctl *kbd, Mousectl *mouse, Widget *root)
{
	Widgetctl *ctl;

	if((ctl = malloc(sizeof(*ctl))) == nil)
		return nil;

	ctl->image = img;
	ctl->mouse = mouse;
	ctl->root = root;
	ctl->kbd = kbd;
	ctl->c = chancreate(sizeof(Widgetmsg), 16);
	ctl->resizec = mouse->resizec;

	threadcreate((void(*)(void*))widgetmain, ctl, 16384);

	redrawwidget(root, img, img->r);
	flushimage(img->display, 1);

	return ctl;
}

/* TODO set clipr */
Point
redrawwidget(Widget *w, Image *dst, Rectangle r)
{
	return w->redraw(w, dst, r);
}

int
kbdevent(Widget *w, Image *img, Rectangle rect, Rune r, Channel *c)
{
	if(w->kbdevent != nil)
		return w->kbdevent(w, img, rect, r, c);
	return 0;
}

int
mouseevent(Widget *w, Image *img, Rectangle rect, Mouse m, Channel *c)
{
	if(w->mouseevent != nil)
		return w->mouseevent(w, img, rect, m, c);
	return 0;
}

void
freewidget(Widget *w)
{
	w->cleanup(w);
}

void
wdefaults(Widget *w)
{
	w->id = nextid();
	w->bg = display->white;
	w->fg = display->black;
	w->kbdevent = nil;
	w->mouseevent = nil;
	w->cleanup = (void(*)(Widget*))free;
}

Widgetmsg*
newmsg(Widget* w, u32int what)
{
	Widgetmsg *msg;

	msg = emalloc(sizeof(*msg));
	msg->sender = w;
	msg->what = what;

	return msg;
}