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::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) 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.
67 Rect self = item_to_window (_rect.translate (_position));
68 boost::optional<Rect> r = self.intersection (area);
76 if (_fill && !_transparent) {
78 setup_fill_context (context);
80 setup_gradient_context (context, self, Duple (draw.x0, draw.y0));
83 context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
89 setup_outline_context (context);
91 /* see the cairo FAQ on single pixel lines to see why we do
92 * the 0.5 pixel additions.
95 if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
97 context->rectangle (self.x0 + 0.5, self.y0 + 0.5, self.width() - 1.0, self.height() - 1.0);
101 if (_outline_what & LEFT) {
102 /* vertical line: move x-coordinate by 0.5 pixels */
103 context->move_to (self.x0 + 0.5, self.y0);
104 context->line_to (self.x0 + 0.5, self.y1);
107 if (_outline_what & TOP) {
108 /* horizontal line: move y-coordinate by 0.5 pixels */
109 context->move_to (self.x0, self.y0 + 0.5);
110 context->line_to (self.x1, self.y0 + 0.5);
113 if (_outline_what & BOTTOM) {
114 /* horizontal line: move y-coordinate by 0.5 pixels */
115 context->move_to (self.x0, self.y1 - 0.5);
116 context->line_to (self.x1, self.y1 - 0.5);
119 if (_outline_what & RIGHT) {
120 /* vertical line: move x-coordinate by 0.5 pixels */
121 context->move_to (self.x1 + 0.5, self.y0);
122 context->line_to (self.x1 + 0.5, self.y1);
132 Rectangle::compute_bounding_box () const
134 if (!_rect.empty()) {
135 Rect r = _rect.fix ();
136 /* take into acount the 0.5 addition to the bounding
137 box for the right and bottom edges, see ::render() above
140 r.x1 += 1.0; // XXX this makes no sense but is necessary
146 _bounding_box_dirty = false;
150 Rectangle::set (Rect const & r)
152 /* We don't update the bounding box here; it's just
153 as cheap to do it when asked.
162 _bounding_box_dirty = true;
168 Rectangle::set_x0 (Coord x0)
170 if (x0 != _rect.x0) {
175 _bounding_box_dirty = true;
181 Rectangle::set_y0 (Coord y0)
183 if (y0 != _rect.y0) {
188 _bounding_box_dirty = true;
194 Rectangle::set_x1 (Coord x1)
196 if (x1 != _rect.x1) {
201 _bounding_box_dirty = true;
207 Rectangle::set_y1 (Coord y1)
209 if (y1 != _rect.y1) {
214 _bounding_box_dirty = true;
220 Rectangle::set_outline_what (What what)
222 if (what != _outline_what) {
223 begin_visual_change ();
224 _outline_what = what;
225 end_visual_change ();