GUIListBox.h

#pragma once

#include "GUIContainer.h"
#include "GUIScript.h"

namespace ParaEngine
{
    struct GUIListItem {
        u16string text;
        bool selected;
        GUI_SCRIPT onclick;     
        CGUIBase *advObj;
    };

    class CGUIListBox:public CGUIContainer
    {
    public:
        CGUIListBox();
        virtual ~CGUIListBox();

        void SetMultiSelect(bool multiselect){m_bMultiSelect=multiselect;};
        bool GetMultiSelect(){return m_bMultiSelect;};

        void SetItemHeight(int height);
        int GetItemHeight(){return m_ItemHeight;}

        int GetSelected(){return m_nSelected;};
        bool  GetSelected(int index);
    
        virtual int GetTextA(std::string& out);
        int GetTextA(int index, std::string& out);
        virtual const char16_t* GetText();;
        const char16_t* GetText(int index);

        void AddItem(const GUIListItem& listitem);

        void AddTextItemA(const char* szText);

        void InsertItem(int index,const GUIListItem* listitem);
        void DeleteItem(int index);

        void RemoveAll();
        GUIListItem* GetItem(int index);

        void SetWordBreak(bool wordbreak);
        bool GetWordBreak(){return m_bWordBreak;};

        void SelectItem(int index);
        bool GetItemCanDrag(){return m_bItemCanDrag;}
        void SetItemCanDrag(bool candrag){m_bItemCanDrag=candrag;}
        
        int Size(){return (int)m_items.size();}

        virtual void            UpdateScroll(int nXDelta,int nYDelta);
        virtual HRESULT         Render(GUIState* pGUIState ,float fElapsedTime);

        virtual void            InitObject(const char * strObjectName, const char * alignment, int x, int y, int width, int height);
        //virtual bool          MsgProc(CGUIEvent *event=NULL);
        virtual bool            MsgProc(MSG *event);
        virtual void            UpdateRects();
        
        virtual IObject* Clone()const;
        virtual void Clone(IObject *pobj)const;
        virtual const IType* GetType()const{return m_type;}

        static void StaticInit();
    protected:
        static const IType* m_type;
        //if allow select multiple items
        bool m_bMultiSelect;
        //the index of the selected item, it is the first selected item if m_bMultiSelect is true; if nothing selected, it is -1;
        int m_nSelected;
        int m_ItemHeight;
        mutable list<GUIListItem> m_items;
        map<int,GUIListItem*> m_itemmap;
        int m_deltaX,m_deltaY;
        bool m_bItemCanDrag;
        bool m_bAllowAdvObject;
        bool m_bDrag;       // Whether the user is dragging the mouse to select
        bool m_bWordBreak;
        Color m_SelBkColor;   // Selected background color
        int m_nSelStart;
    };
}