2 Copyright (C) 2014 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __CANVAS_SCROLL_GROUP_H__
20 #define __CANVAS_SCROLL_GROUP_H__
22 #include "canvas/container.h"
24 namespace ArdourCanvas {
26 /** A ScrollGroup has no contents of its own, but renders
27 * its children in a way that reflects the most recent
28 * call to its scroll_to() method.
30 class LIBCANVAS_API ScrollGroup : public Container
33 enum ScrollSensitivity {
34 ScrollsVertically = 0x1,
35 ScrollsHorizontally = 0x2
38 ScrollGroup (Canvas*, ScrollSensitivity);
39 ScrollGroup (Item*, ScrollSensitivity);
41 void scroll_to (Duple const& d);
42 Duple scroll_offset() const { return _scroll_offset; }
44 bool covers_canvas (Duple const& d) const;
45 bool covers_window (Duple const& d) const;
47 void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
49 ScrollSensitivity sensitivity() const { return _scroll_sensitivity; }
52 ScrollSensitivity _scroll_sensitivity;