itemgroup.h

/***************************************************************************
 *   Copyright (C) 2005 by David Saxton                                    *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   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.                                   *
 ***************************************************************************/

#ifndef ITEMGROUP_H
#define ITEMGROUP_H

#include <qguardedptr.h>

class Item;
class ICNDocument;
class ItemDocument;
class DoubleSpinBox;
class ItemGroup;
class MechanicsDocument;
class Variant;

typedef QValueList<QGuardedPtr<Item> > ItemList;

class QCanvasItem;
class QCanvasItemList;

class ItemGroup : public QObject
{
Q_OBJECT
public:
        ItemGroup( ItemDocument *view, const char *name = 0 );
        virtual ~ItemGroup();
        
        Item *activeItem() const { return m_activeItem; }
        uint itemCount() const { return m_itemList.count(); }
        virtual bool addQCanvasItem( QCanvasItem *qcanvasItem ) = 0;
        virtual void setItems( QCanvasItemList list ) = 0;
        virtual void removeQCanvasItem( QCanvasItem *qcanvasItem ) = 0;
        virtual bool contains( QCanvasItem *qcanvasItem ) const = 0;
        virtual uint count() const = 0;
        bool isEmpty() const { return (count() == 0); }
        virtual void mergeGroup( ItemGroup *group ) = 0;
        virtual void removeAllItems() = 0;
        virtual void deleteAllItems() = 0;
        ItemList items( bool excludeParented = true ) const;
        virtual void setSelected( bool sel ) = 0;
        
        bool itemsHaveSameData() const;
        bool itemsHaveSameDataValue( const QString &id ) const;
        bool itemsHaveDefaultData() const;
        bool itemsAreSameType() const { return b_itemsAreSameType; }
        
public slots:
        void slotAlignHorizontally();
        void slotAlignVertically();
        void slotDistributeHorizontally();
        void slotDistributeVertically();
        
signals:
        void itemAdded( Item *item );
        void itemRemoved( Item *item );
        
protected:
        void registerItem( Item *item );
        void unregisterItem( Item *item );
        void updateAreSameStatus();
        
        ItemList m_itemList;
        bool b_itemsAreSameType;
        ItemDocument * p_view;
        
        ICNDocument *p_icnDocument;
        MechanicsDocument *p_mechanicsDocument;;
        Item *m_activeItem;
        
private slots:
        void getViewPtrs();
};

#endif

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