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
{
 
    using EventHandle_DDContainerPtrCDDItemInfoRefBoolRef =
        delegates::MultiDelegate<DDContainer*, const DDItemInfo&, bool&>;
    using EventHandle_DDContainerPtrCDDItemInfoRefBool =
        delegates::MultiDelegate<DDContainer*, const DDItemInfo&, bool>;
    using EventHandle_EventHandle_DDContainerPtrDDItemState = delegates::MultiDelegate<DDContainer*, DDItemState>;
    using EventHandle_EventHandle_DDContainerPtrWidgetPtrRefIntCoordRef =
        delegates::Delegate<DDContainer*, Widget*&, IntCoord&>;
 
 
    class MYGUI_EXPORT DDContainer : public Widget
    {
        MYGUI_RTTI_DERIVED(DDContainer)
 
    public:
        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::MultiDelegate<DDContainer*> _eventInvalideContainer;
 
        delegates::MultiDelegate<DDContainer*, Widget*, const DDWidgetState&> eventUpdateDropState;
 
    protected:
        void onMouseButtonPressed(int _left, int _top, MouseButton _id) override;
        void onMouseButtonReleased(int _left, int _top, MouseButton _id) override;
        void onMouseDrag(int _left, int _top, MouseButton _id) override;
 
        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);
 
        void setPropertyOverride(std::string_view _key, std::string_view _value) override;
 
    protected:
        bool mDropResult{false};
        bool mNeedDrop{false};
        bool mStartDrop{false};
 
        Widget* mOldDrop{nullptr};
 
        DDItemInfo mDropInfo;
 
        size_t mDropSenderIndex{ITEM_NONE};
 
        // список виджетов для дропа
        Widget* mDropItem{nullptr};
        IntCoord mDropDimension;
 
        IntPoint mClickInWidget;
 
        // нужно и виджету поддержка драг энд дропа
        bool mNeedDragDrop{false};
 
        DDContainer* mReseiverContainer{nullptr};
    };
 
} // namespace MyGUI
 
#endif // MYGUI_DDCONTAINER_H_