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105 lines
4.2 KiB
C++
105 lines
4.2 KiB
C++
// XTMemDC.h interface for the CXTMemDC class.
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//
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// This file is a part of the XTREME CONTROLS MFC class library.
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// (c)1998-2012 Codejock Software, All Rights Reserved.
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//
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// THIS SOURCE FILE IS THE PROPERTY OF CODEJOCK SOFTWARE AND IS NOT TO BE
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// RE-DISTRIBUTED BY ANY MEANS WHATSOEVER WITHOUT THE EXPRESSED WRITTEN
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// CONSENT OF CODEJOCK SOFTWARE.
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//
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// THIS SOURCE CODE CAN ONLY BE USED UNDER THE TERMS AND CONDITIONS OUTLINED
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// IN THE XTREME TOOLKIT PRO LICENSE AGREEMENT. CODEJOCK SOFTWARE GRANTS TO
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// YOU (ONE SOFTWARE DEVELOPER) THE LIMITED RIGHT TO USE THIS SOFTWARE ON A
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// SINGLE COMPUTER.
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//
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// CONTACT INFORMATION:
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// support@codejock.com
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// http://www.codejock.com
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//
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/////////////////////////////////////////////////////////////////////////////
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//{{AFX_CODEJOCK_PRIVATE
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#if !defined(__XTMEMDC_H__)
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#define __XTMEMDC_H__
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//}}AFX_CODEJOCK_PRIVATE
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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//===========================================================================
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// Summary:
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// CXTMemDC is a CDC derived class. CXTMemDC is an extension of CDC
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// that helps eliminate screen flicker when windows are resized, by
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// painting to an off screen bitmap. The class then uses CDC::BitBlt
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// to copy the bitmap back into the current device context after all
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// items have been painted.
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//===========================================================================
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class _XTP_EXT_CLASS CXTMemDC : public CDC
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{
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DECLARE_DYNAMIC(CXTMemDC)
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public:
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//-----------------------------------------------------------------------
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// Summary:
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// Constructs a CXTMemDC object used for flicker free drawing.
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// Parameters:
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// pDC - A Pointer to the current device context.
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// rect - Represents the size of the area to paint.
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// crBack - An RGB color value that represents the background color. If
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// no value is specified the system face color for three
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// dimensional display elements is used.
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// bHorz - If crBack contains gradient colors indicates the direction
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// of the gradient fill.
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//-----------------------------------------------------------------------
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CXTMemDC(CDC* pDC, const CRect& rect, CXTPPaintManagerColorGradient crBack = GetXtremeColor(COLOR_3DFACE), BOOL bHorz = FALSE);
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//-----------------------------------------------------------------------
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// Summary:
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// Destroys a CXTMemDC object, handles cleanup and deallocation
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//-----------------------------------------------------------------------
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virtual ~CXTMemDC();
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public:
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//-----------------------------------------------------------------------
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// Summary:
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// This member function is called to set the valid flag to false
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// so that the off screen device context will not be drawn.
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//-----------------------------------------------------------------------
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void Discard();
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//-----------------------------------------------------------------------
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// Summary:
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// This member function gets content from the given DC
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//-----------------------------------------------------------------------
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void FromDC();
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//-----------------------------------------------------------------------
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// Summary:
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// This member function retrieves a reference to the CBitmap
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// object associated with the memory device context.
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// Returns:
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// A reference to the CBitmap object associated with the memory
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// device context.
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//-----------------------------------------------------------------------
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CBitmap& GetBitmap();
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//-----------------------------------------------------------------------
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// Summary:
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// Call this member function to determine if memory was allocated and
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// the device context was successfully created.
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// Returns:
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// TRUE if the device context is valid, otherwise FALSE.
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//-----------------------------------------------------------------------
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BOOL IsValid() const;
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protected:
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CDC* m_pDC; // Saves the CDC passed in constructor.
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BOOL m_bValid; // Flag used for autodraw in destructor.
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CRect m_rc; // Rectangle of the drawing area.
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CBitmap m_bitmap; // Off screen bitmap.
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HBITMAP m_hOldBitmap; // Original GDI object.
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};
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#endif // #if !defined(__XTMEMDC_H__)
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