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