GUISlider.h

#pragma once
using namespace std;
#include "GUIBase.h"
namespace ParaEngine
{
    class CGUISlider : public CGUIBase
    {
    public:
        CGUISlider();

        virtual BOOL ContainsPoint( const POINT &pt ); 
        virtual bool CanHaveFocus() { return (m_bIsVisible && m_bIsEnabled); }

        virtual void UpdateRects(); 
        virtual void InitObject(const char * strObjectName, const char * alignment, int x, int y, int width, int height);

        virtual HRESULT Render(GUIState* pGUIState,float fElapsedTime);
        virtual bool OnChange(const char* code=NULL);
        
        virtual IObject* Clone()const;
        virtual void Clone(IObject *pobj)const;
        static void StaticInit();

        //virtual bool MsgProc(CGUIEvent *event=NULL);
        virtual bool MsgProc(MSG* event);

        void SetValue( int nValue );
        int  GetValue() const { return m_nValue; };

        void GetRange( int &nMin, int &nMax ) const { nMin = m_nMin; nMax = m_nMax; }
        void SetRange( int nMin, int nMax );

        void SetLinkedObject(CGUIBase* obj){m_Linked=obj;}
        virtual const IType* GetType()const{return m_type;}
    
    protected:
        static const IType* m_type;
        void SetValueInternal( int nValue );
        int  ValueFromPos( int x ); 

        int m_nValue;

        int m_nMin;
        int m_nMax;

        int m_nDragX;      // Mouse position at start of drag
        int m_nDragOffset; // Drag offset from the center of the button
        int m_nButtonX;

        bool m_bPressed;
        CGUIBase* m_Linked;
    private:
        int m_nOldValue;
    };
}