MyGUI_DDContainer.h

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */

#ifndef __MYGUI_DDCONTAINER_H__
#define __MYGUI_DDCONTAINER_H__

#include "MyGUI_Prerequest.h"
#include "MyGUI_Widget.h"
#include "MyGUI_DDItemInfo.h"
#include "MyGUI_EventPair.h"

namespace MyGUI
{

    typedef delegates::CMultiDelegate3<DDContainer*, const DDItemInfo&, bool&> EventHandle_DDContainerPtrCDDItemInfoRefBoolRef;
    typedef delegates::CMultiDelegate3<DDContainer*, const DDItemInfo&, bool> EventHandle_DDContainerPtrCDDItemInfoRefBool;
    typedef delegates::CMultiDelegate2<DDContainer*, DDItemState> EventHandle_EventHandle_DDContainerPtrDDItemState;
    typedef delegates::CDelegate3<DDContainer*, Widget*&, IntCoord&> EventHandle_EventHandle_DDContainerPtrWidgetPtrRefIntCoordRef;


    class MYGUI_EXPORT DDContainer :
        public Widget
    {
        MYGUI_RTTI_DERIVED( DDContainer )

    public:
        DDContainer();

        void setNeedDragDrop(bool _value);
        bool getNeedDragDrop() const;

        void resetDrag();

        /*events:*/
        EventHandle_DDContainerPtrCDDItemInfoRefBoolRef eventStartDrag;

        EventHandle_DDContainerPtrCDDItemInfoRefBoolRef eventRequestDrop;

        EventHandle_DDContainerPtrCDDItemInfoRefBool eventDropResult;

        EventHandle_EventHandle_DDContainerPtrDDItemState eventChangeDDState;

        EventHandle_EventHandle_DDContainerPtrWidgetPtrRefIntCoordRef requestDragWidgetInfo;


        /*internal:*/
        // метод для установления стейта айтема
        virtual void _setContainerItemInfo(size_t _index, bool _set, bool _accept);

        delegates::CMultiDelegate1<DDContainer*> _eventInvalideContainer;

        delegates::CMultiDelegate3<DDContainer*, Widget*, const DDWidgetState&> eventUpdateDropState;

    protected:
        virtual void onMouseButtonPressed(int _left, int _top, MouseButton _id);
        virtual void onMouseButtonReleased(int _left, int _top, MouseButton _id);
        virtual void onMouseDrag(int _left, int _top, MouseButton _id);

        virtual void notifyInvalideDrop(DDContainer* _sender);

        virtual void removeDropItems();
        virtual void updateDropItems();
        virtual void updateDropItemsState(const DDWidgetState& _state);

        void mouseDrag(MouseButton _id);
        void mouseButtonReleased(MouseButton _id);
        void mouseButtonPressed(MouseButton _id);

        void endDrop(bool _reset);

        virtual void setPropertyOverride(const std::string& _key, const std::string& _value);

    protected:
        bool mDropResult;
        bool mNeedDrop;
        bool mStartDrop;

        Widget* mOldDrop;
        Widget* mCurrentSender;

        DDItemInfo mDropInfo;

        size_t mDropSenderIndex;

        // список виджетов для дропа
        Widget* mDropItem;
        IntCoord mDropDimension;

        IntPoint mClickInWidget;

        // нужно и виджету поддержка драг энд дропа
        bool mNeedDragDrop;

        DDContainer* mReseiverContainer;
    };

} // namespace MyGUI

#endif // __MYGUI_DDCONTAINER_H__