shithub: libnate

ref: 1890aeca379976e46deabb0ce844aefc8be1a2c5
dir: /n_label.c/

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

#define N_TYPE NLabel_Type
char* NLabel_Type = "NLabel";

static char*
getlabelstr(NLabel* l)
{
	if (l->labelfunc)
		return l->labelfunc();
	if (l->label)
		return l->label;
	return "";
}

static Rectangle
label_calcsize(Nelem* nelem, Image*, Rectangle r)
{
	NLabel* l = (NLabel*)nelem;
	GUARD(l);
	
	r.max = stringsize(l->font, getlabelstr(l));
	r.max.x += l->margin.left + l->margin.right;
	r.max.y += l->margin.top + l->margin.bottom;
	r.max = addpt(r.min, r.max);
	l->r = r;
	return r;
}

static void
label_draw(Nelem* nelem, Image* img)
{
	char* str;
	Rectangle r;
	NLabel* l = (NLabel*)nelem;
	GUARD(l);
	
	str = getlabelstr(l);
	
	r = l->r;
	r.min.x += l->margin.left;
	r.min.y += l->margin.top;
	
	string(img, r.min, l->color, ZP, l->font, str);
	
	if (nateborders) {
		border(img, l->r, 1, ncolor.blue, ZP);
	}
}

static char*
label_getname(Nelem *nelem)
{
	NLabel *l = (NLabel*)nelem;
	GUARD(l);
	return getlabelstr(l);
}

static Nelemfunctions Nlabelfunctions = {
	.calcsize = label_calcsize,
	.draw = label_draw,
	.getname = label_getname,
};

DEF_ACCESSOR_OneParam(NLabel, label, char*, label);
DEF_ACCESSOR_OneParam(NLabel, labelfunc, StringGetter, labelfunc);
DEF_ACCESSOR_OneParam(NLabel, lfont, Font*, font);
DEF_ACCESSOR_OneParam(NLabel, lcolor, Image*, color);
DEF_ACCESSOR_OneParam(NLabel, lmargin, Nmargin, margin);

NLabel*
New_Label(char *name)
{
	NLabel *e = MakeNelem(NLabel, NLabel_Type, &Nlabelfunctions, name, 0);
	
	e->Label = label;
	e->LabelFunc = labelfunc;
	e->Font = lfont;
	e->Color = lcolor;
	e->Margin = lmargin;
	
	e->label = nil;
	e->labelfunc = nil;
	e->font = display->defaultfont;
	e->color = display->black;
	nc_push(e);
	return e;
}