openglwindow.h

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#ifndef OPENGLWINDOW_HPP_INCLUDED
#define OPENGLWINDOW_HPP_INCLUDED

#include <QtGui/QWindow>
#include <QtGui/QOpenGLFunctions>


#include <Windows.h>
#include <windowsx.h>


class QPainter;
class QOpenGLContext;
class QOpenGLPaintDevice;

struct WMargins {
    int cxLeftWidth;
    int cxRightWidth;
    int cyTopHeight;
    int cyBottomHeight;
};

typedef BOOL (*tDwmDefWindowProc)(HWND, UINT, WPARAM, LPARAM, LRESULT*);
typedef HRESULT (*tDwmIsCompositionEnabled)(BOOL*);
typedef HRESULT (*tDwmExtendFrameIntoClientArea)(HWND hWnd, const WMargins*);
typedef BOOL (*tGetWindowPlacement)(HWND hWnd, WINDOWPLACEMENT *lpwndpl);
typedef HMONITOR (*tMonitorFromWindow)(HWND hWnd, DWORD dwFlags);
typedef BOOL (*tGetMonitorInfoW)(HMONITOR hMonitor, LPMONITORINFO lpmi);
typedef BOOL (*tGetWindowRect)(HWND hWnd, LPRECT lpRect);
typedef BOOL (*tAdjustWindowRectEx)(LPRECT lpRect, DWORD dwStyle, BOOL bMenu, DWORD dwExStyle);
typedef LONG_PTR (*tSetWindowLongPtrW)(HWND hWnd, int nIndex, LONG_PTR dwNewLong);

class OpenGLWindow : public QWindow, protected QOpenGLFunctions
{
    Q_OBJECT
public:
    explicit OpenGLWindow(QWindow *parent = 0);
    ~OpenGLWindow();

    virtual void render(QPainter *painter);
    virtual void render();

    virtual void initialize();

    void setAnimating(bool animating);

public slots:
    void renderLater();
    void renderNow();

protected:
    bool event(QEvent *event) override;

    void exposeEvent(QExposeEvent *event) override;

    bool nativeEvent(const QByteArray &eventType, void *message, long *result);

private:
    bool DWMEnabled(void);
    void adjust_maximized_client_rect(HWND window, RECT& rect);
    long ncHitTest(const MSG* wMsg) const;

    void setupUI();

    bool m_animating;

    tDwmDefWindowProc pDwmDefWindowProc;
    tDwmIsCompositionEnabled pDwmIsCompositionEnabled;
    tDwmExtendFrameIntoClientArea pDwmExtendFrameIntoClientArea;
    tGetWindowPlacement pGetWindowPlacement;
    tMonitorFromWindow pMonitorFromWindow;
    tGetMonitorInfoW pGetMonitorInfoW;
    tGetWindowRect pGetWindowRect;
    tAdjustWindowRectEx pAdjustWindowRectEx;
    tSetWindowLongPtrW pSetWindowLongPtrW;

    QOpenGLContext *m_context;
    QOpenGLPaintDevice *m_device;
};

#endif //OPENGLWINDOW_HPP_INCLUDED