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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 <twin_demospline.h>
#include <twinint.h>
#include <stdio.h>
#define D(x) twin_double_to_fixed(x)
#define _twin_demospline_pixmap(demospline) ((demospline)->widget.window->pixmap)
void
_twin_demospline_paint (twin_demospline_t *demospline)
{
twin_path_t *path;
int i;
path = twin_path_create ();
twin_path_set_cap_style (path, demospline->cap_style);
twin_path_move (path, demospline->points[0].x, demospline->points[0].y);
twin_path_curve (path,
demospline->points[1].x, demospline->points[1].y,
demospline->points[2].x, demospline->points[2].y,
demospline->points[3].x, demospline->points[3].y);
twin_paint_stroke (_twin_demospline_pixmap(demospline), 0xff404040, path,
demospline->line_width);
twin_path_set_cap_style (path, TwinCapButt);
twin_paint_stroke (_twin_demospline_pixmap(demospline), 0xffffff00, path,
twin_int_to_fixed (2));
twin_path_empty (path);
twin_path_move (path, demospline->points[0].x, demospline->points[0].y);
twin_path_draw (path, demospline->points[1].x, demospline->points[1].y);
twin_paint_stroke (_twin_demospline_pixmap(demospline), 0xc08000c0, path,
twin_int_to_fixed (2));
twin_path_empty (path);
twin_path_move (path, demospline->points[3].x, demospline->points[3].y);
twin_path_draw (path, demospline->points[2].x, demospline->points[2].y);
twin_paint_stroke (_twin_demospline_pixmap(demospline), 0xc08000c0, path,
twin_int_to_fixed (2));
twin_path_empty (path);
for (i = 0; i < NPT; i++)
{
twin_path_empty (path);
twin_path_circle (path, demospline->points[i].x, demospline->points[i].y,
twin_int_to_fixed (10));
twin_paint_path (_twin_demospline_pixmap(demospline), 0x40004020, path);
}
twin_path_destroy (path);
}
static twin_dispatch_result_t
_twin_demospline_update_pos (twin_demospline_t *demospline, twin_event_t *event)
{
if (demospline->which < 0)
return TwinDispatchContinue;
demospline->points[demospline->which].x = twin_int_to_fixed (event->u.pointer.x);
demospline->points[demospline->which].y = twin_int_to_fixed (event->u.pointer.y);
_twin_widget_queue_paint (&demospline->widget);
return TwinDispatchDone;
}
#define twin_fixed_abs(f) ((f) < 0 ? -(f) : (f))
static int
_twin_demospline_hit (twin_demospline_t *demospline, twin_fixed_t x, twin_fixed_t y)
{
int i;
for (i = 0; i < NPT; i++)
if (twin_fixed_abs (x - demospline->points[i].x) < demospline->line_width / 2 &&
twin_fixed_abs (y - demospline->points[i].y) < demospline->line_width / 2)
return i;
return -1;
}
twin_dispatch_result_t
_twin_demospline_dispatch (twin_widget_t *widget, twin_event_t *event)
{
twin_demospline_t *demospline = (twin_demospline_t *) widget;
if (_twin_widget_dispatch (widget, event) == TwinDispatchDone)
return TwinDispatchDone;
switch (event->kind) {
case TwinEventPaint:
_twin_demospline_paint (demospline);
break;
case TwinEventButtonDown:
demospline->which = _twin_demospline_hit (demospline,
twin_int_to_fixed (event->u.pointer.x),
twin_int_to_fixed (event->u.pointer.y));
return _twin_demospline_update_pos (demospline, event);
break;
case TwinEventMotion:
return _twin_demospline_update_pos (demospline, event);
break;
case TwinEventButtonUp:
if (demospline->which < 0)
return TwinDispatchContinue;
_twin_demospline_update_pos (demospline, event);
demospline->which = -1;
return TwinDispatchDone;
break;
default:
break;
}
return TwinDispatchContinue;
}
void
_twin_demospline_init (twin_demospline_t *demospline,
twin_box_t *parent,
twin_dispatch_proc_t dispatch)
{
static const twin_widget_layout_t preferred = { 0, 0, 1, 1 };
_twin_widget_init (&demospline->widget, parent, 0, preferred, dispatch);
twin_widget_set (&demospline->widget, 0xffffffff);
demospline->line_width = twin_int_to_fixed (100);
demospline->cap_style = TwinCapButt;
demospline->points[0].x = twin_int_to_fixed (100);
demospline->points[0].y = twin_int_to_fixed (100);
demospline->points[1].x = twin_int_to_fixed (300);
demospline->points[1].y = twin_int_to_fixed (300);
demospline->points[2].x = twin_int_to_fixed (100);
demospline->points[2].y = twin_int_to_fixed (300);
demospline->points[3].x = twin_int_to_fixed (300);
demospline->points[3].y = twin_int_to_fixed (100);
}
twin_demospline_t *
twin_demospline_create (twin_box_t *parent)
{
twin_demospline_t *demospline = malloc (sizeof (twin_demospline_t));
_twin_demospline_init(demospline, parent, _twin_demospline_dispatch);
return demospline;
}
void
twin_demospline_start (twin_screen_t *screen, const char *name, int x, int y, int w, int h)
{
twin_toplevel_t *toplevel = twin_toplevel_create (screen, TWIN_ARGB32,
TwinWindowApplication,
x, y, w, h, name);
twin_demospline_t *demospline = twin_demospline_create (&toplevel->box);
(void) demospline;
twin_toplevel_show (toplevel);
}
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