mod_fem_viewer/FemViewer/win/WinGL.h

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#ifndef WinGL_H_
#define WinGL_H_

#include"WinApp.h"
#include"ViewManager.h"

namespace FemViewer {
namespace Win       { 

class WinGL : public CWindowImpl<WinGL, CWindow, CControlWinTraits>
{
public:

    WinGL(FemViewer::ViewManager& pVmgr, HWND hWnd);
    ~WinGL(void);

    void Render(void);
    BEGIN_MSG_MAP(WinGL)
        MESSAGE_HANDLER(WM_PAINT, OnPaint)
        MESSAGE_HANDLER(WM_LBUTTONDOWN, OnLBttnDown)
        MESSAGE_HANDLER(WM_LBUTTONUP, OnLBttnUp)
        MESSAGE_HANDLER(WM_RBUTTONDOWN, OnRBttnDown)
        MESSAGE_HANDLER(WM_RBUTTONUP, OnRBttnUp)
        MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
        MESSAGE_HANDLER(WM_SIZE, OnSize)
        MESSAGE_HANDLER(WM_CHAR, OnChar )
    END_MSG_MAP()

private:
    enum {
        MBTN_DOWN = 0,
        MBTN_UP   = 1
    };

    LRESULT OnPaint(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnLBttnDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnLBttnUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnRBttnDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnRBttnUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnMouseMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnSize(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT OnChar(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    
    void InitGL(int width,int height);
    void InitData();
    bool SetPixelFormat(HDC hdc, int colorBits, int depthBits, int stencilBits);
    int  FindPixelFormat(HDC hdc, int colorBits, int depthBits, int stencilBits);
    bool CreateContext(int colorBits,int depthBits,int stencilBits1);
    void DestroyContext();
    void ResetView(void) { if(IsWindow()) Invalidate(FALSE); }
    void Refresh(BOOL bflag = FALSE) { Invalidate(bflag); }
    unsigned  GetModifires() const;
    HDC          m_hDC;
    HGLRC        m_hRC;
    FemViewer::ViewManager& m_Vmgr;
public:
    LRESULT OnMenu(UINT nMsg, WPARAM wParam, LPARAM lParam);
};

inline void WinGL::Render(void)
{
    //::DrawScene();
    Invalidate(TRUE);
}

inline LRESULT WinGL::OnPaint(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; wParam; lParam; bHandled;

    BOOL bRet = wglMakeCurrent( m_hDC, m_hRC );
    ATLASSERT(bRet); bRet;
    m_Vmgr.DisplayCallback();
    ATLASSERT(SwapBuffers( m_hDC ));
    ATLASSERT(wglMakeCurrent( NULL, NULL ));
    ATLASSERT(ValidateRect( NULL ));
    return 0L;
}

inline LRESULT WinGL::OnLBttnDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; bHandled;

    int posx = LOWORD(lParam);
    int posy = HIWORD(lParam);
    m_Vmgr.MouseButtonCallback(0,MBTN_DOWN,GetModifires(),posx,posy);
    SetCapture();
    Refresh();
    return 0L;
}

inline LRESULT WinGL::OnLBttnUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; wParam; lParam; bHandled;

    UINT nFlags = (UINT) wParam;
    int posx = LOWORD(lParam);
    int posy = HIWORD(lParam);
    int modif = 0;
    m_Vmgr.MouseButtonCallback(0,MBTN_UP,GetModifires(),posx,posy);
    ReleaseCapture();
    Refresh();
    return 0L;
}

inline LRESULT WinGL::OnRBttnDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; bHandled;

    int posx = LOWORD(lParam);
    int posy = HIWORD(lParam);
    BOOL bRet = wglMakeCurrent( m_hDC, m_hRC );
    ATLASSERT(bRet); bRet;
    m_Vmgr.MouseButtonCallback(1,MBTN_DOWN,GetModifires(),posx,posy);
    ATLASSERT(wglMakeCurrent( NULL, NULL ));
    SetCapture();
    Refresh();
    return 0L;
}

inline LRESULT WinGL::OnRBttnUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; wParam; lParam; bHandled;

    int posx = LOWORD(lParam);
    int posy = HIWORD(lParam);
    m_Vmgr.MouseButtonCallback(1,MBTN_UP,GetModifires(),posx,posy);
    ReleaseCapture();
    Refresh();
    return 0L;
}

inline LRESULT WinGL::OnMouseMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; bHandled;

    int posx = LOWORD(lParam);
    int posy = HIWORD(lParam);
    m_Vmgr.MouseMotionCallback(posx,posy);
    Refresh();
    return 0L;
}

inline LRESULT WinGL::OnSize(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; wParam; bHandled;
    int cx = LOWORD(lParam);
    int cy = HIWORD(lParam);
    ::SendMessage(MainApp::GetInstance()->GetStatusBar(),WM_SIZE,0,0);
    if (!m_hWnd || !cy) return 0L;
    HDC hDC = ::GetDC(m_hWnd);
    ATLASSERT(hDC);
    ATLASSERT(m_hRC);
    ATLVERIFY(::wglMakeCurrent( hDC, m_hRC ));
    m_Vmgr.ReshapeCallback(cx,cy);
    ATLVERIFY(ReleaseDC(hDC));
    return 0L;
}

inline LRESULT WinGL::OnChar(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
    nMsg; lParam; bHandled;

    switch (wParam)
    {
        case ' ': ResetView();
    }
    return 0L;
}

inline LRESULT WinGL::OnMenu(UINT nMsg, WPARAM wParam, LPARAM lParam)
{
    nMsg, wParam, lParam;
    int wmId = LOWORD(wParam);
    m_Vmgr.MenuCallback(wmId);
    Refresh();
    return 0L;
}

inline unsigned WinGL::GetModifires() const
{
    unsigned int modif = 0;
    static bool btn_state;
    if(GetAsyncKeyState(VK_LSHIFT) & 0x8000)
        modif |= 0x1;
    if(GetAsyncKeyState(VK_LCONTROL) & 0x8000)
        modif |= 0x2;
    if(GetAsyncKeyState(VK_RMENU) & 0x8000)
        modif |= 0x4;
/*  modif |= (1 << (btn_state ? 1 : 0));
    btn_state = !!( ::GetKeyState(VK_CONTROL) & 0x8000 );
    modif |= (1 << (btn_state ? 2 : 0));
    btn_state = !!( ::GetKeyState(VK_MENU) & 0x8000 );
    modif |= (1 << (btn_state ? 4 : 0))*/;
    return modif;
}

} // end namsepace Win
} // end namespace FemViewer

#endif /* WinGL_H_
*/

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