79 lines
3.2 KiB
C
79 lines
3.2 KiB
C
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// --------------------------------------------------------------------------
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// Module Name: DimmedWindow.h
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//
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// Copyright (c) 2000, Microsoft Corporation
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//
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// Class that implements the dimmed window when displaying logoff / shut down
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// dialog.
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//
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// History: 2000-05-18 vtan created
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// --------------------------------------------------------------------------
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#ifndef _DimmedWindow_
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#define _DimmedWindow_
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#include "unknwn.h"
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// --------------------------------------------------------------------------
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// CDimmedWindow::CDimmedWindow
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//
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// Purpose: Implements the dimmed window feature for the turn off dialog.
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//
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// History: 2000-05-17 vtan created
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// --------------------------------------------------------------------------
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class CDimmedWindow : public IUnknown
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{
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private:
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CDimmedWindow (void);
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CDimmedWindow (const CDimmedWindow& copyObject);
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const CDimmedWindow& operator = (const CDimmedWindow& assignObject);
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virtual ~CDimmedWindow (void);
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public:
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CDimmedWindow (HINSTANCE hInstance);
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public:
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// IUnknown methods
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virtual HRESULT STDMETHODCALLTYPE QueryInterface (REFIID riid, void* *ppvObject);
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virtual ULONG STDMETHODCALLTYPE AddRef (void);
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virtual ULONG STDMETHODCALLTYPE Release (void);
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HWND Create (void);
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void SetupDim();
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BOOL StepDim();
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void Dither();
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private:
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int GetLowestScreenBitDepth (void) const;
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bool IsForcedDimScreen (void) const;
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bool IsDimScreen (void) const;
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static LRESULT CALLBACK WndProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
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private:
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LONG _lReferenceCount;
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const HINSTANCE _hInstance;
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ATOM _atom;
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HWND _hwnd;
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int _xVirtualScreen,
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_yVirtualScreen,
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_cxVirtualScreen,
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_cyVirtualScreen;
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bool _fDithered;
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HDC _hdcDimmed;
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HBITMAP _hbmOldDimmed;
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HBITMAP _hbmDimmed;
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void* _pvPixels;
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int _idxChunk;
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int _idxSaturation;
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private:
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static const TCHAR s_szWindowClassName[];
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static const TCHAR s_szExplorerKeyName[];
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static const TCHAR s_szExplorerPolicyKeyName[];
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static const TCHAR s_szForceDimValueName[];
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};
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#endif /* _DimmedWindow_ */
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