2 Copyright (C) 2011-2013 Paul Davis
3 Author: Carl Hetherington <cth@carlh.net>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <cairomm/context.h>
22 #include "pbd/stacktrace.h"
23 #include "pbd/compose.h"
25 #include "canvas/canvas.h"
26 #include "canvas/rectangle.h"
27 #include "canvas/debug.h"
28 #include "canvas/utils.h"
31 using namespace ArdourCanvas;
33 Rectangle::Rectangle (Canvas* c)
35 , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
39 Rectangle::Rectangle (Canvas* c, Rect const & rect)
42 , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
46 Rectangle::Rectangle (Item* parent)
48 , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
52 Rectangle::Rectangle (Item* parent, Rect const & rect)
55 , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
60 Rectangle::get_self_for_render () const
62 /* In general, a Rectangle will have a _position of (0,0) within its
63 parent, and its extent is actually defined by _rect. But in the
64 unusual case that _position is set to something other than (0,0),
65 we should take that into account when rendering.
68 return item_to_window (_rect.translate (_position));
72 Rectangle::render_self (Rect const & area, Cairo::RefPtr<Cairo::Context> context, Rect self) const
74 boost::optional<Rect> r = self.intersection (area);
82 if (_fill && !_transparent) {
84 setup_fill_context (context);
86 setup_gradient_context (context, self, Duple (draw.x0, draw.y0));
89 context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
95 setup_outline_context (context);
97 /* the goal here is that if the border is 1 pixel
98 * thick, it will precisely align with the corner
99 * coordinates of the rectangle. So if the rectangle
100 * has a left edge at 0 and a right edge at 10, then
101 * the left edge must span 0..1, the right edge
102 * must span 9..10 because the first and final pixels
103 * to be colored are actually "at" 0.5 and 9.5 (midway
104 * between the integer coordinates.
107 if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
109 self = self.shrink (0.5);
110 context->rectangle (self.x0, self.y0, self.width(), self.height());
114 if (_outline_what & LEFT) {
115 context->move_to (self.x0+0.5, self.y0);
116 context->line_to (self.x0+0.5, self.y1);
119 if (_outline_what & TOP) {
120 context->move_to (self.x0, self.y0+0.5);
121 context->line_to (self.x1, self.y0+0.5);
124 if (_outline_what & BOTTOM) {
125 context->move_to (self.x0, self.y1-0.5);
126 context->line_to (self.x1, self.y1-0.5);
129 if (_outline_what & RIGHT) {
130 context->move_to (self.x1-0.5, self.y0);
131 context->line_to (self.x1-0.5, self.y1);
140 Rectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
142 render_self (area, context, get_self_for_render ());
146 Rectangle::compute_bounding_box () const
148 if (!_rect.empty()) {
149 Rect r = _rect.fix ();
153 _bounding_box_dirty = false;
157 Rectangle::set (Rect const & r)
159 /* We don't update the bounding box here; it's just
160 as cheap to do it when asked.
169 _bounding_box_dirty = true;
175 Rectangle::set_x0 (Coord x0)
177 if (x0 != _rect.x0) {
182 _bounding_box_dirty = true;
188 Rectangle::set_y0 (Coord y0)
190 if (y0 != _rect.y0) {
195 _bounding_box_dirty = true;
201 Rectangle::set_x1 (Coord x1)
203 if (x1 != _rect.x1) {
208 _bounding_box_dirty = true;
214 Rectangle::set_y1 (Coord y1)
216 if (y1 != _rect.y1) {
221 _bounding_box_dirty = true;
227 Rectangle::set_outline_what (What what)
229 if (what != _outline_what) {
230 begin_visual_change ();
231 _outline_what = what;
232 end_visual_change ();
237 /*-------------------*/
240 TimeRectangle::compute_bounding_box () const
242 Rectangle::compute_bounding_box ();
245 Rect r = _bounding_box.get ();
247 /* This is a TimeRectangle, so its right edge is drawn 1 pixel beyond
248 * (larger x-axis coordinates) than a normal Rectangle.
251 r.x1 += 1.0; /* this should be using safe_add() */
258 TimeRectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
260 Rect self = get_self_for_render ();
262 /* This is a TimeRectangle, so its right edge is drawn 1 pixel beyond
263 * (larger x-axis coordinates) than a normal Rectangle.
266 self.x1 += 1.0; /* this should be using safe_add() */
267 render_self (area, context, self);