122 lines
2.8 KiB
C++
122 lines
2.8 KiB
C++
/*
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* Copyright (C) 2014-2017 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2015 David Robillard <d@drobilla.net>
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*
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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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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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)
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: Container (c)
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, _scroll_sensitivity (s)
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{
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}
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ScrollGroup::ScrollGroup (Item* parent, ScrollSensitivity s)
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: Container (parent)
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, _scroll_sensitivity (s)
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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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Rect r = bounding_box();
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if (!r) {
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return;
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}
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r.x0 = max (r.x0, 0.);
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r.y0 = max (r.y0, 0.);
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Rect self (_position.x + r.x0,
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_position.y + r.y0,
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_position.x + r.x1,
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_position.y + r.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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_canvas->item_visual_property_changed (this);
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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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Rect r = bounding_box ();
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if (!r) {
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return false;
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}
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/* Bounding box is in item coordinates, but we need
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to consider the position of the bounding box
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within the canvas.
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*/
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return r.translate (position()).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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Rect r = bounding_box ();
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if (!r) {
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return false;
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}
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/* Bounding box is in item coordinates, but we need
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to consider the position of the bounding box
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within the canvas.
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*/
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return r.translate (position()).contains (d);
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}
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