David Robillard
8f823388d9
The problem this is avoiding makes absolutely no sense. Either I'm dumb, or something is more deeply wrong with scroll group bounding boxes, or both, but I don't care anymore. This works. Viva release mode.
119 lines
2.8 KiB
C++
119 lines
2.8 KiB
C++
/*
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Copyright (C) 2014 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <iostream>
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#include "pbd/compose.h"
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#include "canvas/canvas.h"
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#include "canvas/debug.h"
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#include "canvas/scroll_group.h"
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using namespace std;
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using namespace ArdourCanvas;
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ScrollGroup::ScrollGroup (Canvas* c, ScrollSensitivity s, bool clip)
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: Container (c)
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, _scroll_sensitivity (s)
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, _clip(clip)
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{
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}
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ScrollGroup::ScrollGroup (Item* parent, ScrollSensitivity s, bool clip)
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: Container (parent)
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, _scroll_sensitivity (s)
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, _clip(clip)
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{
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}
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void
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ScrollGroup::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
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{
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/* clip the draw to the area that this scroll group nominally occupies
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* WITHOUT scroll offsets in effect
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*/
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boost::optional<Rect> r = bounding_box();
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if (!r) {
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return;
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}
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if (!_clip) {
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/* kludge: clip disabled, because for some reason the cursor scroll
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group requires scroll offsets here to clip correctly yet everything
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else does not. I can't figure this out, so since not clipping a
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single arrow isn't the end of the world, just don't clip. */
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Container::render (area, context);
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}
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Rect self (_position.x + r.get().x0,
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_position.y + r.get().y0,
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_position.x + r.get().x1,
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_position.y + r.get().y1);
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self.x1 = min (_position.x + _canvas->width(), self.x1);
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self.y1 = min (_position.y + _canvas->height(), self.y1);
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context->save ();
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context->rectangle (self.x0, self.y0, self.width(), self.height());
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context->clip ();
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Container::render (area, context);
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context->restore ();
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}
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void
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ScrollGroup::scroll_to (Duple const& d)
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{
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if (_scroll_sensitivity & ScrollsHorizontally) {
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_scroll_offset.x = d.x;
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}
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if (_scroll_sensitivity & ScrollsVertically) {
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_scroll_offset.y = d.y;
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}
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}
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bool
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ScrollGroup::covers_canvas (Duple const& d) const
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{
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boost::optional<Rect> r = bounding_box ();
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if (!r) {
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return false;
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}
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return r->contains (d);
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}
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bool
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ScrollGroup::covers_window (Duple const& d) const
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{
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boost::optional<Rect> r = bounding_box ();
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if (!r) {
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return false;
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}
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Rect w = r->translate (-_scroll_offset);
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return w.contains (d);
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}
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