From e5755647cb9dd3135e6b5556482f76f7f21b6cff Mon Sep 17 00:00:00 2001
From: fcolin
Date: Thu, 1 Feb 2007 12:52:38 +0000
Subject:  Utilisateur : Fcolin       Date : 25/10/01   Heure : 11:44 Créé (vss
 1)

---
 Horloge/MemDC.h | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 Horloge/MemDC.h

(limited to 'Horloge/MemDC.h')

diff --git a/Horloge/MemDC.h b/Horloge/MemDC.h
new file mode 100644
index 0000000..494fbbe
--- /dev/null
+++ b/Horloge/MemDC.h
@@ -0,0 +1,104 @@
+#ifndef _MEMDC_H_
+#define _MEMDC_H_
+
+//////////////////////////////////////////////////
+// CMemDC - memory DC
+//
+// Author: Keith Rule
+// Email:  keithr@europa.com
+// Copyright 1996-1999, 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
+//
+// 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());
+			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 accidently 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;
+	}
+};
+
+#endif
\ No newline at end of file
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