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 -0.5..+0.5, the right edge
102 * must span 9.5..10.5 (i.e. the single full color
103 * pixel is precisely aligned with 0 and 10
106 * we have to shift left/up in all cases, which means
107 * subtraction along both axes (i.e. edge at
108 * N, outline must start at N-0.5).
110 * see the cairo FAQ on single pixel lines to see why we do
111 * the 0.5 pixel additions.
114 self = self.translate (Duple (0.5, 0.5));
116 if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
118 context->rectangle (self.x0, self.y0, self.width(), self.height());
122 if (_outline_what & LEFT) {
123 context->move_to (self.x0, self.y0);
124 context->line_to (self.x0, self.y1);
127 if (_outline_what & TOP) {
128 context->move_to (self.x0, self.y0);
129 context->line_to (self.x1, self.y0);
132 if (_outline_what & BOTTOM) {
133 context->move_to (self.x0, self.y1);
134 context->line_to (self.x1, self.y1);
137 if (_outline_what & RIGHT) {
138 context->move_to (self.x1, self.y0);
139 context->line_to (self.x1, self.y1);
148 Rectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
150 render_self (area, context, get_self_for_render ());
154 Rectangle::compute_bounding_box () const
156 if (!_rect.empty()) {
157 Rect r = _rect.fix ();
159 /* take into acount the 0.5 addition to the bounding
160 box for the right and bottom edges, see ::render() above
168 _bounding_box_dirty = false;
172 Rectangle::set (Rect const & r)
174 /* We don't update the bounding box here; it's just
175 as cheap to do it when asked.
184 _bounding_box_dirty = true;
190 Rectangle::set_x0 (Coord x0)
192 if (x0 != _rect.x0) {
197 _bounding_box_dirty = true;
203 Rectangle::set_y0 (Coord y0)
205 if (y0 != _rect.y0) {
210 _bounding_box_dirty = true;
216 Rectangle::set_x1 (Coord x1)
218 if (x1 != _rect.x1) {
223 _bounding_box_dirty = true;
229 Rectangle::set_y1 (Coord y1)
231 if (y1 != _rect.y1) {
236 _bounding_box_dirty = true;
242 Rectangle::set_outline_what (What what)
244 if (what != _outline_what) {
245 begin_visual_change ();
246 _outline_what = what;
247 end_visual_change ();
252 /*-------------------*/
255 TimeRectangle::compute_bounding_box () const
257 Rectangle::compute_bounding_box ();
260 Rect r = _bounding_box.get ();
262 /* This is a TimeRectangle, so its right edge is drawn 1 pixel beyond
263 * (larger x-axis coordinates) than a normal Rectangle.
266 r.x1 += 1.0; /* this should be using safe_add() */
273 TimeRectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
275 Rect self = get_self_for_render ();
278 /* This is a TimeRectangle, so its right edge is drawn 1 pixel beyond
279 * (larger x-axis coordinates) than a normal Rectangle.
282 self.x1 += 1.0; /* this should be using safe_add() */
283 render_self (area, context, self);