CDimmedWindow Class Reference

Inheritance diagram for CDimmedWindow:

Collaboration diagram for CDimmedWindow:

Public Member Functions
	CDimmedWindow ()
	~CDimmedWindow ()
void	WaitForInit ()
void	Init ()
void	Capture ()
bool	Step ()
void	Blt (HDC hdc)
HWND	Wnd ()
Public Member Functions inherited from ATL::CComObjectRootEx< CComMultiThreadModelNoCS >
	~CComObjectRootEx ()
ULONG	InternalAddRef ()
ULONG	InternalRelease ()
void	Lock ()
void	Unlock ()
HRESULT	_AtlInitialConstruct ()
Public Member Functions inherited from ATL::CComObjectRootBase
	CComObjectRootBase ()
	~CComObjectRootBase ()
void	SetVoid (void *)
HRESULT	_AtlFinalConstruct ()
HRESULT	FinalConstruct ()
void	InternalFinalConstructAddRef ()
void	InternalFinalConstructRelease ()
void	FinalRelease ()

Static Private Member Functions
static LRESULT WINAPI	WndProc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

Private Attributes
HWND	m_hwnd
HDC	m_hdc
HBITMAP	m_hbitmap
HGDIOBJ	m_oldbitmap
LONG	m_width
LONG	m_height
BITMAPINFO	m_bi
UCHAR *	m_bytes
int	m_step

Additional Inherited Members
Static Public Member Functions inherited from ATL::CComObjectRootBase
static void WINAPI	ObjectMain (bool)
static const struct _ATL_CATMAP_ENTRY *	GetCategoryMap ()
static HRESULT WINAPI	InternalQueryInterface (void *pThis, const _ATL_INTMAP_ENTRY *pEntries, REFIID iid, void **ppvObject)
Public Attributes inherited from ATL::CComObjectRootBase
LONG	m_dwRef
Private Types inherited from IUnknown
typedef IUnknown *	LPUNKNOWN
Private Member Functions inherited from IUnknown
HRESULT	QueryInterface ([in] REFIID riid, [out, iid_is(riid)] void **ppvObject)
ULONG	AddRef ()
ULONG	Release ()

Detailed Description

Definition at line 23 of file dimmedwindow.cpp.

Constructor & Destructor Documentation

CDimmedWindow()

CDimmedWindow::CDimmedWindow ( )

inline

Definition at line 41 of file dimmedwindow.cpp.

        : m_hwnd(NULL)
        , m_hdc(NULL)
        , m_hbitmap(NULL)
        , m_oldbitmap(NULL)
        , m_width(0)
        , m_height(0)
        , m_bytes(NULL)
        , m_step(0)
    {
        WNDCLASSEXW wndclass = {sizeof(wndclass)};
        wndclass.lpfnWndProc = WndProc;
        wndclass.hInstance = hDllInstance;
        wndclass.hCursor = LoadCursor(0, IDC_ARROW);
        wndclass.lpszClassName = L"DimmedWindowClass";
 
        if (!RegisterClassExW(&wndclass))
            return;
 
        m_width = GetSystemMetrics(SM_CXVIRTUALSCREEN);
        m_height = GetSystemMetrics(SM_CYVIRTUALSCREEN);
 
        memset(&m_bi, 0, sizeof(m_bi));
        m_bi.bmiHeader.biSize = sizeof(m_bi);
        m_bi.bmiHeader.biWidth = m_width;
        m_bi.bmiHeader.biHeight = m_height;
        m_bi.bmiHeader.biPlanes = 1;
        m_bi.bmiHeader.biBitCount = 32;
        m_bi.bmiHeader.biCompression = BI_RGB;
        m_bi.bmiHeader.biSizeImage = m_width * 4 * m_height;
        m_bytes = new UCHAR[m_width * 4 * m_height];
 
        LONG x = GetSystemMetrics(SM_XVIRTUALSCREEN);
        LONG y = GetSystemMetrics(SM_YVIRTUALSCREEN);
 
        m_hwnd = CreateWindowExW(WS_EX_TOPMOST,
                                 L"DimmedWindowClass",
                                 NULL,
                                 WS_POPUP,
                                 x, y,
                                 m_width, m_height,
                                 NULL, NULL,
                                 hDllInstance,
                                 (LPVOID)this);
    }

~CDimmedWindow()

CDimmedWindow::~CDimmedWindow ( )

inline

Definition at line 87 of file dimmedwindow.cpp.

    {
        if (m_hwnd)
            DestroyWindow(m_hwnd);
        UnregisterClassW(L"DimmedWindowClass", hDllInstance);
        if (m_oldbitmap)
             SelectObject(m_hdc, m_oldbitmap);
        if (m_hbitmap)
            DeleteObject(m_hbitmap);
        if (m_hdc)
            DeleteObject(m_hdc);
        if (m_bytes)
            delete[] m_bytes;
    }

Member Function Documentation

Blt()

void CDimmedWindow::Blt ( HDC  hdc )

inline

Definition at line 183 of file dimmedwindow.cpp.

    {
        BitBlt(hdc, 0, 0, m_width, m_height, m_hdc, 0, 0, SRCCOPY);
    }

Capture()

void CDimmedWindow::Capture ( )

inline

Definition at line 131 of file dimmedwindow.cpp.

    {
        HWND desktopWnd = GetDesktopWindow();
        HDC desktopDC = GetDC(desktopWnd);
 
        m_hdc = CreateCompatibleDC(desktopDC);
 
        m_hbitmap = CreateCompatibleBitmap(desktopDC, m_width, m_height);
        m_oldbitmap = SelectObject(m_hdc, m_hbitmap);
        BitBlt(m_hdc, 0, 0, m_width, m_height, desktopDC, 0, 0, SRCCOPY);
 
        ReleaseDC(desktopWnd, desktopDC);
    }

Referenced by Init().

Init()

void CDimmedWindow::Init ( )

inline

Definition at line 120 of file dimmedwindow.cpp.

    {
        Capture();
 
        ShowWindow(m_hwnd, SW_SHOW);
        SetForegroundWindow(m_hwnd);
        EnableWindow(m_hwnd, FALSE);
 
        SetTimer(m_hwnd, FADE_TIMER_ID, 200, NULL);
    }

Step()

bool CDimmedWindow::Step ( )

inline

Definition at line 145 of file dimmedwindow.cpp.

    {
        // Stop after 10 steps
        if (m_step++ > 10 || !m_bytes)
            return false;
 
        int lines = GetDIBits(m_hdc, m_hbitmap, 0, m_height, m_bytes, &m_bi, DIB_RGB_COLORS);
        if (lines)
        {
            for (int xh = 0; xh < m_height; ++xh)
            {
                int h = m_width * 4 * xh;
                for (int w = 0; w < m_width; ++w)
                {
                    UCHAR b = m_bytes[(h + w * 4) + 0];
                    UCHAR g = m_bytes[(h + w * 4) + 1];
                    UCHAR r = m_bytes[(h + w * 4) + 2];
 
                    // Standard formula to convert a color.
                    int gray = (r * 30 + g * 59 + b * 11) / 100;
                    if (gray < 0)
                        gray = 0;
 
                    // Do not fade too fast.
                    r = (r*2 + gray) / 3;
                    g = (g*2 + gray) / 3;
                    b = (b*2 + gray) / 3;
 
                    m_bytes[(h + w * 4) + 0] = b;
                    m_bytes[(h + w * 4) + 1] = g;
                    m_bytes[(h + w * 4) + 2] = r;
                }
            }
            SetDIBits(m_hdc, m_hbitmap, 0, lines, m_bytes, &m_bi, DIB_RGB_COLORS);
        }
        return true;
    }

WaitForInit()

void CDimmedWindow::WaitForInit ( )

inline

Definition at line 103 of file dimmedwindow.cpp.

    {
        MSG msg;
 
        while (IsWindow(m_hwnd) && !IsWindowVisible(m_hwnd))
        {
            while (::PeekMessage(&msg, m_hwnd, 0, 0, PM_REMOVE))
            {
                ::TranslateMessage(&msg);
                ::DispatchMessage(&msg);
 
                if (IsWindowVisible(m_hwnd))
                    break;
            }
        }
    }

Wnd()

HWND CDimmedWindow::Wnd ( )

inline

Definition at line 188 of file dimmedwindow.cpp.

    {
        return m_hwnd;
    }

WndProc()

LRESULT WINAPI CDimmedWindow::WndProc ( HWND  hWnd, UINT  uMsg, WPARAM  wParam, LPARAM  lParam  )

staticprivate

Definition at line 201 of file dimmedwindow.cpp.

{
    switch (uMsg)
    {
    case WM_NCCREATE:
    {
        LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
        CDimmedWindow* info = static_cast<CDimmedWindow*>(lpcs->lpCreateParams);
        SetWindowLongPtrW(hWnd, GWLP_USERDATA, (LONG_PTR)info);
        SetTimer(hWnd, INIT_TIMER_ID, 50, NULL);
        break;
    }
 
    case WM_PAINT:
    {
        CDimmedWindow* info = reinterpret_cast<CDimmedWindow*>(GetWindowLongPtrW(hWnd, GWLP_USERDATA));
        if (info)
        {
            PAINTSTRUCT ps;
            BeginPaint(hWnd, &ps);
            info->Blt(ps.hdc);
            EndPaint(hWnd, &ps);
        }
        return 0;
    }
 
    case WM_TIMER:
    {
        if (wParam == INIT_TIMER_ID)
        {
            CDimmedWindow* info = reinterpret_cast<CDimmedWindow*>(GetWindowLongPtrW(hWnd, GWLP_USERDATA));
            KillTimer(hWnd, INIT_TIMER_ID);
            info->Init();
        }
        else if (wParam == FADE_TIMER_ID)
        {
            CDimmedWindow* info = reinterpret_cast<CDimmedWindow*>(GetWindowLongPtrW(hWnd, GWLP_USERDATA));
            if (info && info->Step())
                InvalidateRect(hWnd, NULL, TRUE);
            else
                KillTimer(hWnd, FADE_TIMER_ID);
        }
        return 0;
    }
 
    default:
        break;
    }
 
    return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

Referenced by CDimmedWindow().

Member Data Documentation

m_bi

BITMAPINFO CDimmedWindow::m_bi

private

Definition at line 34 of file dimmedwindow.cpp.

Referenced by CDimmedWindow(), and Step().

m_bytes

UCHAR* CDimmedWindow::m_bytes

private

Definition at line 35 of file dimmedwindow.cpp.

Referenced by CDimmedWindow(), Step(), and ~CDimmedWindow().

m_hbitmap

HBITMAP CDimmedWindow::m_hbitmap

private

Definition at line 30 of file dimmedwindow.cpp.

Referenced by Capture(), Step(), and ~CDimmedWindow().

m_hdc

HDC CDimmedWindow::m_hdc

private

Definition at line 29 of file dimmedwindow.cpp.

Referenced by Blt(), Capture(), Step(), and ~CDimmedWindow().

m_height

LONG CDimmedWindow::m_height

private

Definition at line 33 of file dimmedwindow.cpp.

Referenced by Blt(), Capture(), CDimmedWindow(), and Step().

m_hwnd

HWND CDimmedWindow::m_hwnd

private

Definition at line 28 of file dimmedwindow.cpp.

Referenced by CDimmedWindow(), Init(), WaitForInit(), Wnd(), and ~CDimmedWindow().

m_oldbitmap

HGDIOBJ CDimmedWindow::m_oldbitmap

private

Definition at line 31 of file dimmedwindow.cpp.

Referenced by Capture(), and ~CDimmedWindow().

m_step

int CDimmedWindow::m_step

private

Definition at line 36 of file dimmedwindow.cpp.

Referenced by Step().

m_width

LONG CDimmedWindow::m_width

private

Definition at line 32 of file dimmedwindow.cpp.

Referenced by Blt(), Capture(), CDimmedWindow(), and Step().

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The documentation for this class was generated from the following file:

• dll/win32/msgina/dimmedwindow.cpp