61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/*
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Copyright (C) 2011-2014 Paul Davis
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Original Author: Carl Hetherington <cth@carlh.net>
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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_CONTAINER_H__
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#define __CANVAS_CONTAINER_H__
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#include "canvas/item.h"
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namespace ArdourCanvas
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{
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/** a Container is an item which has no content of its own
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* but renders its children in some geometrical arrangement.
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*
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* Imagined examples of containers:
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*
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* Container: renders each child at the child's self-determined position
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* Box: renders each child along an axis (vertical or horizontal)
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* Table/Grid: renders each child within a two-dimensional grid
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*
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* Other?
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*/
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class LIBCANVAS_API Container : public Item
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{
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public:
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Container (Canvas *);
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Container (Item *);
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Container (Item *, Duple const & position);
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/** The compute_bounding_box() method is likely to be identical
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* in all containers (the union of the children's bounding boxes).
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* It can be overridden as necessary.
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*/
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void compute_bounding_box () const;
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/** The render() method is likely to be identical in all containers
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* (just call Item::render_children()). It can be overridden as necessary.
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*/
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void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
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};
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}
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#endif
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