kicad/include/view/view_group.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* Copyright (C) 2020-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
/**
* @file view_group.h
*/
#ifndef VIEW_GROUP_H_
#define VIEW_GROUP_H_
#include <view/view_item.h>
#include <deque>
namespace KIGFX
{
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/**
* Extend #VIEW_ITEM by possibility of grouping items into a single object.
*
* VIEW_GROUP does not take over ownership of the held items. The main purpose of this class is
* to group items and draw them on a single layer (in particular the overlay).
*/
class VIEW_GROUP : public VIEW_ITEM
{
public:
VIEW_GROUP( VIEW* aView = nullptr );
virtual ~VIEW_GROUP();
/**
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* Return the number of stored items.
*/
virtual unsigned int GetSize() const;
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/**
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* Add an item to the group.
*/
virtual void Add( VIEW_ITEM* aItem );
/**
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* Remove an item from the group.
*/
virtual void Remove( VIEW_ITEM* aItem );
/**
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* Remove all the stored items from the group.
*/
virtual void Clear();
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virtual VIEW_ITEM* GetItem( unsigned int aIdx ) const;
/**
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* Return the bounding box for all stored items covering all its layers.
*/
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virtual const BOX2I ViewBBox() const override;
/**
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* Draw all the stored items in the group on the given layer.
*
* @param aLayer is the layer which should be drawn.
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* @param aView is the VIEW that should be used for drawing.
*/
virtual void ViewDraw( int aLayer, VIEW* aView ) const override;
/**
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* Return all the layers used by the stored items.
*
* @param aLayers[] is the output layer index array.
* @param aCount is the number of layer indices in aLayers[].
*/
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virtual void ViewGetLayers( int aLayers[], int& aCount ) const override;
/**
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* Set layer used to draw the group.
*/
inline virtual void SetLayer( int aLayer )
{
m_layer = aLayer;
}
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/**
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* Free all the items that were added to the group.
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*/
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void FreeItems();
protected:
virtual const std::vector<VIEW_ITEM*> updateDrawList() const;
protected:
int m_layer;
std::vector<VIEW_ITEM*> m_groupItems;
};
} // namespace KIGFX
#endif // VIEW_GROUP_H_