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/*
Copyright (C) 2014 Paul Davis
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.
*/
#ifndef __CANVAS_SCROLL_GROUP_H__
#define __CANVAS_SCROLL_GROUP_H__
#include "canvas/container.h"
namespace ArdourCanvas {
/** A ScrollGroup has no contents of its own, but renders
* its children in a way that reflects the most recent
* call to its scroll_to() method.
*/
class LIBCANVAS_API ScrollGroup : public Container
{
public:
enum ScrollSensitivity {
ScrollsVertically = 0x1,
ScrollsHorizontally = 0x2
};
ScrollGroup (Canvas*, ScrollSensitivity);
ScrollGroup (Item*, ScrollSensitivity);
void scroll_to (Duple const& d);
Duple scroll_offset() const { return _scroll_offset; }
bool covers_canvas (Duple const& d) const;
bool covers_window (Duple const& d) const;
void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
ScrollSensitivity sensitivity() const { return _scroll_sensitivity; }
private:
ScrollSensitivity _scroll_sensitivity;
Duple _scroll_offset;
};
}
#endif
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