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The SBJ MVC Framework - The Model, from Abstraction to Realization

, 20 Mar 2009
A Model-View-Controller Framework that integrates with the MFC Doc/View architecture
SbjDevBin201.zip
SbjDevSrc201.zip
Shapes
Data
res
buttons.bmp
filelarge.bmp
filesmall.bmp
filesmall.png
main.bmp
Shapes.ico
ShapesDoc.ico
Toolbar.bmp
Toolbar256.bmp
treeimages.bmp
vssver.scc
Write - Copy.png
Write.png
Write1.png
writelarge.bmp
writesmall - Copy.bmp
writesmall - Copy.png
writesmall.bmp
writesmall.png
XmlMvc
res
vssver.scc
SbjCore
res
bigcat.ico
main.bmp
properties.bmp
properties_hc.bmp
properties_wnd_hc.ico
vssver.scc
//------------------------------------------------------------------------------
// $Workfile: GDIUtils.h $
// $Header: /DevNet/SbjCore/SbjCore/Utils/GDIUtils.h 4     2/24/08 11:47a Steve $
//
//	Copyright � 2006 Tartus, Inc.
// All rights reserved.
//
// The information contained herein is confidential, proprietary to
// Tartus, Inc., and considered a trade secret as defined
// in section 499C of the penal code of the State of California.  Use
// of this information by anyone other than authorized employees of
// Tartus, Inc. is granted only under a written non-disclosure
// agreement, which expressly prescribes the scope and manner of such
// use.
//
// *** Authors ***
//	 Neal O'Hara
//	 John La Porta
//	 Zhimin Lin
//	 Andreas Christmann
//	 Steve Johnson
//	 Frankie Jefferson
//	 Tartus, Inc.
//
// $Revision: 4 $
//
//-----------------------------------------------------------------------------

#pragma once 

namespace SbjCore
{
	namespace Utils
	{
		namespace GDI 
		{

			class DC
			{
			public:
				// Destructor
				virtual ~DC()
				{
					m_pDC = NULL;
				}

			protected:
				explicit DC(CDC* pDC) :
					m_pDC(pDC)
				{
				}

				CDC* GetDC() const
				{
					return m_pDC;
				}

			private:
				DC(const DC&); // not defined
				const DC& operator=(const DC&); // not defined
				
				CDC* m_pDC;
			};
			
			/////////////////////////////////////////////////////////////////////
			
			class StockObject : public DC
			{
			public:
				StockObject(CDC* pDC, int nIndex) : 
					DC(pDC), 
					m_pLastObject(NULL)
				{
					if (GetDC()->GetSafeHdc())
					{
						m_pLastObject = pDC->SelectStockObject(nIndex);
					}
				}

				virtual ~StockObject()
				{
					if (m_pLastObject)
					{
						(void)GetDC()->SelectObject(m_pLastObject);
						m_pLastObject = NULL;
					}
				}

			private:
				StockObject(const StockObject&);                  // not defined
				const StockObject& operator=(const StockObject&); // not defined

				CGdiObject* m_pLastObject;
			};
			
			///////////////////////////////////////////////////////////////////////
			
			template <class T>
			class Object : public DC
			{
			public:
				Object(CDC* pDC, T* pObject);

				virtual ~Object();

			private:
				Object(const Object&); // not defined
				const Object& operator=(const Object&); // not defined

				T* m_pLast;
			};

			template <class T>
			Object<T>::Object(CDC* pDC, T* pObject) : 
				DC(pDC),
				m_pLast(NULL)
			{
				if ((pObject != NULL) && GetDC()->GetSafeHdc())
				{
					m_pLast = pDC->SelectObject(pObject);
				}
			}


			template <class T>
			Object<T>::~Object()
			{
				if (m_pLast)
				{
					(void) GetDC()->SelectObject(m_pLast);
					m_pLast = NULL;
				}
			}
			
			/////////////////////////////////////////////////////////////////////
			
			// just to provide a straight init constructor
			LOGFONT AFX_EXT_API InitLogFont(int nHeight, LPCTSTR lpszFaceName, 
					int nWeight = FW_REGULAR, bool bItalic = false, bool bUnderline = false, bool bStrikeOut = false);
			
			LOGFONT AFX_EXT_API CopyLogFont(const LOGFONT& lf);

			// creates a lfHeight in negative points using CreatePointFont
			LOGFONT AFX_EXT_API InitPointLogFont(int n100thsPoints, LPCTSTR lpszFaceName, 
				int nWeight = FW_REGULAR, bool bItalic = false, bool bUnderline = false, bool bStrikeOut = false);
				
			//////////////////////////////////////////////////
			// CMemDC - memory DC
			//
			// Author: Keith Rule
			// Email:  keithr@europa.com
			// Copyright 1996-2002, Keith Rule
			//
			// You may freely use or modify this code provided this
			// Copyright is included in all derived versions.
			//
			// History - 10/3/97 Fixed scrolling bug.
			//               Added print support. - KR
			//
			//       11/3/99 Fixed most common complaint. Added
			//            background color fill. - KR
			//
			//       11/3/99 Added support for mapping modes other than
			//            MM_TEXT as suggested by Lee Sang Hun. - KR
			//
			//       02/11/02 Added support for CScrollView as supplied
			//             by Gary Kirkham. - KR
			//
			// This class implements a memory Device Context which allows
			// flicker free drawing.

			class CMemDC : public CDC 
			{
			private:       
				CBitmap    m_bitmap;        // Offscreen bitmap
				CBitmap*       m_oldBitmap; // bitmap originally found in CMemDC
				CDC*       m_pDC;           // Saves CDC passed in constructor
				CRect      m_rect;          // Rectangle of drawing area.
				BOOL       m_bMemDC;        // TRUE if CDC really is a Memory DC.
			public:

				CMemDC(CDC* pDC, const CRect* pRect = NULL) : CDC()
				{
					ASSERT(pDC != NULL); 

					// Some initialization
					m_pDC = pDC;
					m_oldBitmap = NULL;
					m_bMemDC = !pDC->IsPrinting();

					// Get the rectangle to draw
					if (pRect == NULL) {
						pDC->GetClipBox(&m_rect);
					} else {
						m_rect = *pRect;
					}

					if (m_bMemDC) {
						// Create a Memory DC
						CreateCompatibleDC(pDC);
						pDC->LPtoDP(&m_rect);

						m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), 
							m_rect.Height());
						m_oldBitmap = SelectObject(&m_bitmap);

						SetMapMode(pDC->GetMapMode());

						SetWindowExt(pDC->GetWindowExt());
						SetViewportExt(pDC->GetViewportExt());

						pDC->DPtoLP(&m_rect);
						SetWindowOrg(m_rect.left, m_rect.top);
					} else {
						// Make a copy of the relevent parts of the current 
						// DC for printing
						m_bPrinting = pDC->m_bPrinting;
						m_hDC       = pDC->m_hDC;
						m_hAttribDC = pDC->m_hAttribDC;
					}

					// Fill background 
					FillSolidRect(m_rect, pDC->GetBkColor());
				}

				~CMemDC()      
				{          
					if (m_bMemDC) {
						// Copy the offscreen bitmap onto the screen.
						m_pDC->BitBlt(m_rect.left, m_rect.top, 
							m_rect.Width(),  m_rect.Height(),
							this, m_rect.left, m_rect.top, SRCCOPY);            

						//Swap back the original bitmap.
						SelectObject(m_oldBitmap);        
					} else {
						// All we need to do is replace the DC with an illegal
						// value, this keeps us from accidentally deleting the 
						// handles associated with the CDC that was passed to 
						// the constructor.              
						m_hDC = m_hAttribDC = NULL;
					}       
				}

				// Allow usage as a pointer    
				CMemDC* operator->() 
				{
					return this;
				}       

				// Allow usage as a pointer    
				operator CMemDC*() 
				{
					return this;
				}
			};

		}
	}
}
//*** Modification History ***
// $Log: /DevNet/SbjCore/SbjCore/Utils/GDIUtils.h $
// 
// 4     2/24/08 11:47a Steve
// 
// 3     2/13/08 10:27a Steve
// Added Named Colors to ColorProp, Bold and Italics to Fonts and error
// checking to ProfiledFileProperty
// 
// 2     10/11/07 11:48a Steve
// Added InitLogFont
// 
// 1     4/02/07 4:57p Steve
// 
// 1     6/09/06 5:16p Steve

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

SBJ

United States United States
Real name is Steve Johnson. Programming since 1979. Started on a Heathkit Micro with a DEC LSI-11 and UCSD Pascal. Moved to PCs & DOS as soon as Turbo Pascal became available. Did some Assembly, ISR, TSR etc. All this while working for a Manufacturing Co. for 8 years. Had my own solo Co. doing barcode labeling software for 4 years (terrible business man, all I wanted to do was code). Since then working for various software companies. Moved to Windows around the time of 3.1 with Borland C then C++. Then on to VC++ and MFC, and just about anything I could get my hands on or had to learn for my job, and been at it ever since. Of course recently I've been playing with .NET, ASP, C#, WPF etc.

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