shithub: libnate

ref: 794e2ee40b0345746539fbd41ad0eda122f8603e
dir: /n_vbox.c/

#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include "nate_construct.h"
#include "n_vbox.h"

#define N_TYPE NVBox_Type
char* NVBox_Type = "NVBox";

typedef struct csizep csizep;
struct csizep {
	Rectangle crect;
	Rectangle frect;
	Image *screen;
};

static void
vbox_childsize(Nelem* nelem, int, void *aux)
{
	csizep *p = (csizep*)aux;
	Rectangle r = ncallcalcsize(nelem, p->screen, p->crect);
	combinerect(&p->frect, r);
	p->crect.min.y = r.max.y;
}

static Rectangle
vbox_calcsize(Nelem* nelem, Image* img, Rectangle r)
{
	csizep params;
	NVBox* b = (NVBox*)nelem;
	GUARD(b);
	
	params.crect = r;
	params.screen = img;
	params.frect.min = r.min;
	params.frect.max = r.min;
	
	lforeach(&b->children, vbox_childsize, &params);
	
	b->r = params.frect;
	return b->r;
}

static void
vbox_childdraw(Nelem* elem, int, void *aux)
{
	ncalldraw(elem, (Image*)aux);
}

static void
vbox_draw(Nelem* nelem, Image* img)
{
	NVBox* b = (NVBox*)nelem;
	GUARD(b);
	
	lforeach(&b->children, vbox_childdraw, img);
}

static void
vbox_free(Nelem* nelem)
{
	NVBox* b = (NVBox*)nelem;
	if (nisroot(b))
		return;
	
	lfreelist(&b->children);
	free(b);
}

static Nlist*
vbox_getchildren(Nelem* nelem)
{
	NVBox* b = (NVBox*)nelem;
	GUARD(b);
	return &b->children;
}

static Nelemfunctions Nvboxfunctions = {
	.calcsize = vbox_calcsize,
	.draw = vbox_draw,
	.free = vbox_free,
	.getchildren = vbox_getchildren,
};

static NVBox*
vbox_slot(Nelem* child)
{
	if (child == nc_get()) {
		nc_pop();
	}
	NVBox* b = (NVBox*)nc_get();
	GUARD(b);
	
	ladd(&b->children, child);
	return b;
}

DEF_ACCESSOR_OneParam(NVBox, vbox_sizetocontent, int, sizetocontent);

NVBox*
New_VBox(char *name)
{
	NVBox *b = MakeNelem(NVBox, NVBox_Type, &Nvboxfunctions, name);
	
	b->Slot = vbox_slot;
	b->SizeToContent = vbox_sizetocontent;
	
	linit(&b->children);
	b->sizetocontent = 0;
	nc_push(b);
	return b;
}