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/*
* Copyright (C) 2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2014-2015 Paul Davis <paul@linuxaudiosystems.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __CANVAS_CONTAINER_H__
#define __CANVAS_CONTAINER_H__
#include "canvas/item.h"
namespace ArdourCanvas
{
/** a Container is an item which has no content of its own
* but renders its children in some geometrical arrangement.
*
* Imagined examples of containers:
*
* Container: renders each child at the child's self-determined position
* Box: renders each child along an axis (vertical or horizontal)
* Table/Grid: renders each child within a two-dimensional grid
*
* Other?
*/
class LIBCANVAS_API Container : public Item
{
public:
Container (Canvas *);
Container (Item *);
Container (Item *, Duple const & position);
/** The compute_bounding_box() method is likely to be identical
* in all containers (the union of the children's bounding boxes).
* It can be overridden as necessary.
*/
void compute_bounding_box () const;
/** The render() method is likely to be identical in all containers
* (just call Item::render_children()). It can be overridden as necessary.
*/
void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
/** The prepare_for_render() method is likely to be identical in all
* containers (just call Item::prepare_for_render_children()). It can be
* overridden as necessary.
*/
void prepare_for_render (Rect const & area) const;
};
}
#endif
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