+/*
+ Copyright (C) 2011-2013 Paul Davis
+ Author: Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
#include <iostream>
#include <cairomm/context.h>
#include "pbd/stacktrace.h"
-#include "pbd/xml++.h"
#include "pbd/compose.h"
+
+#include "canvas/canvas.h"
#include "canvas/rectangle.h"
#include "canvas/debug.h"
#include "canvas/utils.h"
using namespace std;
using namespace ArdourCanvas;
-Rectangle::Rectangle (Group* parent)
- : Item (parent)
- , Outline (parent)
- , Fill (parent)
+Rectangle::Rectangle (Canvas* c)
+ : Item (c)
, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
{
+}
+Rectangle::Rectangle (Canvas* c, Rect const & rect)
+ : Item (c)
+ , _rect (rect)
+ , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
+{
}
-Rectangle::Rectangle (Group* parent, Rect const & rect)
+Rectangle::Rectangle (Item* parent)
+ : Item (parent)
+ , _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
+{
+}
+
+Rectangle::Rectangle (Item* parent, Rect const & rect)
: Item (parent)
- , Outline (parent)
- , Fill (parent)
, _rect (rect)
, _outline_what ((What) (LEFT | RIGHT | TOP | BOTTOM))
{
-
}
void
-Rectangle::render (Rect const & /*area*/, Cairo::RefPtr<Cairo::Context> context) const
+Rectangle::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
- Rect plot = _rect;
+ /* In general, a Rectangle will have a _position of (0,0) within its
+ parent, and its extent is actually defined by _rect. But in the
+ unusual case that _position is set to something other than (0,0),
+ we should take that into account when rendering.
+ */
+ Rect self = item_to_window (_rect.translate (_position));
+ boost::optional<Rect> r = self.intersection (area);
- plot.x1 = min (plot.x1, CAIRO_MAX);
- plot.y1 = min (plot.y1, CAIRO_MAX);
+ if (!r) {
+ return;
+ }
- if (_fill) {
- setup_fill_context (context);
- context->rectangle (plot.x0, plot.y0, plot.width(), plot.height());
-
- if (!_outline) {
- context->fill ();
+ Rect draw = r.get ();
+
+ if (_fill && !_transparent) {
+ if (_stops.empty()) {
+ setup_fill_context (context);
} else {
-
- /* special/common case: outline the entire rectangle is
- * requested, so just use the same path for the fill
- * and stroke.
- */
-
- if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
- context->fill_preserve();
- setup_outline_context (context);
- context->stroke ();
- } else {
- context->fill ();
- }
+ setup_gradient_context (context, self, Duple (draw.x0, draw.y0));
}
+
+ context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
+ context->fill ();
}
if (_outline) {
-
- if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
- /* if we filled and use full outline, we are already done */
+ setup_outline_context (context);
+
+ /* see the cairo FAQ on single pixel lines to see why we do
+ * the 0.5 pixel additions.
+ */
- if (!_fill) {
- context->rectangle (plot.x0, plot.y0, plot.width(), plot.height());
- setup_outline_context (context);
- context->stroke ();
- }
+ if (_outline_what == What (LEFT|RIGHT|BOTTOM|TOP)) {
+ context->rectangle (self.x0 + 0.5, self.y0 + 0.5, self.width() - 1.0, self.height() - 1.0);
+
} else {
-
+
if (_outline_what & LEFT) {
- context->move_to (plot.x0, plot.y0);
- context->line_to (plot.x0, plot.y1);
+ /* vertical line: move x-coordinate by 0.5 pixels */
+ context->move_to (self.x0 + 0.5, self.y0);
+ context->line_to (self.x0 + 0.5, self.y1);
}
+ if (_outline_what & TOP) {
+ /* horizontal line: move y-coordinate by 0.5 pixels */
+ context->move_to (self.x0, self.y0 + 0.5);
+ context->line_to (self.x1, self.y0 + 0.5);
+ }
+
if (_outline_what & BOTTOM) {
- context->move_to (plot.x0, plot.y1);
- context->line_to (plot.x1, plot.y1);
+ /* horizontal line: move y-coordinate by 0.5 pixels */
+ context->move_to (self.x0, self.y1 - 0.5);
+ context->line_to (self.x1, self.y1 - 0.5);
}
if (_outline_what & RIGHT) {
- context->move_to (plot.x1, plot.y0);
- context->line_to (plot.x1, plot.y1);
- }
-
- if (_outline_what & TOP) {
- context->move_to (plot.x0, plot.y0);
- context->line_to (plot.x1, plot.y0);
+ /* vertical line: move x-coordinate by 0.5 pixels */
+ context->move_to (self.x1 + 0.5, self.y0);
+ context->line_to (self.x1 + 0.5, self.y1);
}
- setup_outline_context (context);
- context->stroke ();
}
+
+ context->stroke ();
}
}
void
Rectangle::compute_bounding_box () const
{
- Rect r = _rect.fix ();
- _bounding_box = boost::optional<Rect> (r.expand (_outline_width / 2));
-
+ if (!_rect.empty()) {
+ Rect r = _rect.fix ();
+ /* take into acount the 0.5 addition to the bounding
+ box for the right and bottom edges, see ::render() above
+ */
+
+ r.x1 += 1.0; // XXX this makes no sense but is necessary
+ r.y1 += 0.5;
+
+ _bounding_box = r;
+ }
+
_bounding_box_dirty = false;
}
/* We don't update the bounding box here; it's just
as cheap to do it when asked.
*/
-
- begin_change ();
-
- _rect = r;
-
- _bounding_box_dirty = true;
- end_change ();
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: rectangle change (set)\n");
+ if (r != _rect) {
+
+ begin_change ();
+
+ _rect = r;
+
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Rectangle::set_x0 (Coord x0)
{
- begin_change ();
-
- _rect.x0 = x0;
-
- _bounding_box_dirty = true;
- end_change ();
-
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: rectangle change (x0)\n");
+ if (x0 != _rect.x0) {
+ begin_change ();
+
+ _rect.x0 = x0;
+
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Rectangle::set_y0 (Coord y0)
{
- begin_change ();
-
- _rect.y0 = y0;
-
- _bounding_box_dirty = true;
- end_change();
-
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: rectangle change (y0)\n");
+ if (y0 != _rect.y0) {
+ begin_change ();
+
+ _rect.y0 = y0;
+
+ _bounding_box_dirty = true;
+ end_change();
+ }
}
void
Rectangle::set_x1 (Coord x1)
{
- begin_change ();
-
- _rect.x1 = x1;
-
- _bounding_box_dirty = true;
- end_change ();
-
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: rectangle change (x1)\n");
+ if (x1 != _rect.x1) {
+ begin_change ();
+
+ _rect.x1 = x1;
+
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Rectangle::set_y1 (Coord y1)
{
- begin_change ();
-
- _rect.y1 = y1;
-
- _bounding_box_dirty = true;
- end_change ();
-
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: rectangle change (y1)\n");
+ if (y1 != _rect.y1) {
+ begin_change ();
+
+ _rect.y1 = y1;
+
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Rectangle::set_outline_what (What what)
{
- begin_change ();
-
- _outline_what = what;
-
- end_change ();
-}
-
-void
-Rectangle::set_outline_what (int what)
-{
- set_outline_what ((What) what);
+ if (what != _outline_what) {
+ begin_visual_change ();
+ _outline_what = what;
+ end_visual_change ();
+ }
}
projects / ardour.git / blobdiff