GUIKeyboardVirtual.h

#pragma once

#define SAMPLE_BUFFER_SIZE 1024
#define KEY_PRESSED(x,y) (((x)[(y)]&0x80)!=0)

namespace ParaEngine
{
    class CGUIBase;

    class CGUIKeyboardVirtual
    {
    public:
        CGUIKeyboardVirtual();
        ~CGUIKeyboardVirtual();

        virtual bool IsUseWindowsMessage();
        virtual void SetUseWindowsMessage(bool bUseWinMsg);

        virtual void PushKeyEvent(UINT uMsg, WPARAM wParam, LPARAM lParam);
        virtual void PushKeyEvent(const MSG &msg);

        virtual void Update();

        virtual bool IsKeyPressed(DWORD nKey);
        virtual void SetKeyPressed(DWORD nKey, bool bPressed);
        virtual void Reset();

        virtual HRESULT ReadBufferedData();
        virtual HRESULT ReadImmediateData();
        
        virtual BYTE GetLastKeyState(int nIndex);
        virtual BYTE GetCurrentKeyState(int nIndex);
        virtual short GetKeyState(int nIndex);
        inline BYTE* GetKeyStates(){ return m_keystate; }

        DWORD GetElementsCount() const;
        void SetElementsCount(DWORD val);

        inline DIDEVICEOBJECTDATA* GetDeviceObjectData(){
            return m_didod;
        }
    public:
        static void SetCapture(CGUIBase* obj);
        static void ReleaseCapture();
        static void ReleaseCapture(CGUIBase* obj);
        static CGUIBase* GetCapture();

    protected:
        DWORD              m_dwElements;
        
        BYTE               m_keystate[256];   // DirectInput keyboard state buffer 
        
        BYTE               m_lastkeystate[256];   //last DirectInput keyboard state buffer 
        DIDEVICEOBJECTDATA m_didod[SAMPLE_BUFFER_SIZE];  // Receives buffered data 

        static CGUIBase *       m_objCaptured;
        bool                    m_bUseWindowMessage;

        MSG                     m_buffered_key_msgs[SAMPLE_BUFFER_SIZE / 2];
        int                     m_buffered_key_msgs_count;
    };
}