shithub: libnate

ref: 1890aeca379976e46deabb0ce844aefc8be1a2c5
dir: /n_button.c/

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include "nate_construct.h"
#include "n_box.h"
#include "n_label.h"
#include "n_button.h"

#define N_TYPE NButton_Type
char *NButton_Type = "NButton";

static Rectangle
button_calcsize(Nelem *nelem, Image *screen, Rectangle r)
{
	NButton *b = (NButton*)nelem;
	GUARD(b);
	b->r = ncallcalcsize(b->box, screen, r);
	return b->r;
}

static void
button_draw(Nelem *nelem, Image *img)
{
	NButton *b = (NButton*)nelem;
	GUARD(b);
	ncalldraw(b->box, img);
}

static Nelem*
button_checkhit(Nelem *nelem, Image *screen, Mouse m)
{
	NButton *b = (NButton*)nelem;
	GUARD(b);
	return ncallcheckhit(b->box, screen, m);
}

static void
button_free(Nelem *nelem)
{
	NButton *b = (NButton*)nelem;
	GUARD(b);
	if (nisroot(b) || nisroot(b->box))
		return;
	b->box->funcs->free(b->box);
	free(b);
}

static Nlist*
button_getchildren(Nelem *nelem)
{
	NButton *b = (NButton*)nelem;
	GUARD(b);
	return ncallgetchildren(b->box);
}

static Nelemfunctions Nbuttonfunctions = {
	.calcsize = button_calcsize,
	.draw = button_draw,
	.checkhit = button_checkhit,
	.free = button_free,
	.getchildren = button_getchildren,
};

static NButton*
button_slot(Nelem* child)
{
	if (child == nc_get())
		nc_pop();
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->box);
	c->box->Slot(child);
	nc_pop();
	return c;
}

static NButton*
button_border(int w, Image *i)
{
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->box);
	c->box->Border(w, i);
	nc_pop();
	return c;
}

static NButton*
button_autosize(int n)
{
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->box);
	c->box->AutoSize(n);
	nc_pop();
	return c;
}

static NButton*
button_onclick(OnclickHandler f, void *aux)
{
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->box);
	c->box->OnClick(f, aux);
	nc_pop();
	return c;
}

static NButton*
button_label(char *l)
{
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->label);
	c->label->Label(l);
	nc_pop();
	return c;
}

static NButton*
button_labelfunc(StringGetter f)
{
	NButton *c = (NButton*)nc_get();
	GUARD(c);
	nc_push(c->label);
	c->label->LabelFunc(f);
	nc_pop();
	return c;
}

NButton*
New_Button(char *name)
{
	NButton *b = MakeNelem(NButton, NButton_Type, &Nbuttonfunctions, name, 0);
	
	b->box = New_Box(name)
		->Slot(NAssign(NLabel, &b->label, New_Label(nil)));
	/* pop box from stack */
	nc_pop();
	
	b->Slot = button_slot;
	b->Border = button_border;
	b->AutoSize = button_autosize;
	b->OnClick = button_onclick;
	
	b->Label = button_label;
	b->LabelFunc = button_labelfunc;
	
	nc_push(b);
	return b;
}