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/*
* Twin - A Tiny Window System
* Copyright © 2004 Keith Packard <keithp@keithp.com>
* All rights reserved.
*
* This Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the Twin Library; see the file COPYING. If not,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "twinint.h"
static void
_twin_label_query_geometry (twin_label_t *label)
{
twin_path_t *path = twin_path_create ();
twin_text_metrics_t m;
label->widget.preferred.width = twin_fixed_to_int (label->font_size) * 2;
label->widget.preferred.height = twin_fixed_to_int (label->font_size) * 2;
if (path)
{
twin_path_set_font_size (path, label->font_size);
twin_path_set_font_style (path, label->font_style);
twin_text_metrics_utf8 (path, label->label, &m);
label->widget.preferred.width += twin_fixed_to_int (m.width);
twin_path_destroy (path);
}
}
static void
_twin_label_paint (twin_label_t *label)
{
twin_path_t *path = twin_path_create ();
twin_text_metrics_t m;
twin_coord_t w = _twin_widget_width(label);
twin_coord_t h = _twin_widget_height(label);
if (path)
{
twin_fixed_t wf = twin_int_to_fixed (w);
twin_fixed_t hf = twin_int_to_fixed (h);
twin_fixed_t x, y;
twin_path_set_font_size (path, label->font_size);
twin_path_set_font_style (path, label->font_style);
twin_text_metrics_utf8 (path, label->label, &m);
y = (hf - (m.ascent + m.descent)) / 2 + m.ascent + label->offset.y;
switch (label->align) {
case TwinAlignLeft:
x = label->font_size / 2;
break;
case TwinAlignCenter:
x = (wf - m.width) / 2;
break;
case TwinAlignRight:
x = wf - label->font_size / 2 - m.width;
break;
}
x += label->offset.x;
twin_path_move (path, x, y);
twin_path_utf8 (path, label->label);
twin_paint_path (label->widget.window->pixmap, label->foreground, path);
twin_path_destroy (path);
}
}
twin_dispatch_result_t
_twin_label_dispatch (twin_widget_t *widget, twin_event_t *event)
{
twin_label_t *label = (twin_label_t *) widget;
if (_twin_widget_dispatch (widget, event) == TwinDispatchDone)
return TwinDispatchDone;
switch (event->kind) {
case TwinEventPaint:
_twin_label_paint (label);
break;
case TwinEventQueryGeometry:
_twin_label_query_geometry (label);
break;
default:
break;
}
return TwinDispatchContinue;
}
void
twin_label_set (twin_label_t *label,
const char *value,
twin_argb32_t foreground,
twin_fixed_t font_size,
twin_style_t font_style)
{
if (value)
{
char *new = malloc (strlen (value) + 1);
if (new)
{
if (label->label)
free (label->label);
label->label = new;
strcpy (label->label, value);
}
}
label->font_size = font_size;
label->font_style = font_style;
label->foreground = foreground;
_twin_widget_queue_layout (&label->widget);
}
void
_twin_label_init (twin_label_t *label,
twin_box_t *parent,
const char *value,
twin_argb32_t foreground,
twin_fixed_t font_size,
twin_style_t font_style,
twin_dispatch_proc_t dispatch)
{
static const twin_widget_layout_t preferred = { 0, 0, 1, 1 };
_twin_widget_init (&label->widget, parent, 0, preferred, dispatch);
label->label = NULL;
label->offset.x = 0;
label->offset.y = 0;
label->align = TwinAlignCenter;
twin_label_set (label, value, foreground, font_size, font_style);
}
twin_label_t *
twin_label_create (twin_box_t *parent,
const char *value,
twin_argb32_t foreground,
twin_fixed_t font_size,
twin_style_t font_style)
{
twin_label_t *label = malloc (sizeof (twin_label_t));
if (!label)
return 0;
_twin_label_init (label, parent, value, foreground,
font_size, font_style, _twin_label_dispatch);
return label;
}
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