cachedscrollview.h

收录《Visual C++ 编程技巧典型案例解析——图形图像处理与数据库篇》 中43个源代码。

#if !defined(AFX_CACHEDSCROLLVIEW_H__E4A869C6_123A_4D16_9D9C_2B4C0EDEE257__INCLUDED_)
#define AFX_CACHEDSCROLLVIEW_H__E4A869C6_123A_4D16_9D9C_2B4C0EDEE257__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// CachedScrollView.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CCachedScrollView view

class CCachedScrollView : public CScrollView
{
	DECLARE_DYNCREATE(CCachedScrollView)
protected:
	CCachedScrollView(); 
public:
	BOOL CacheValid;
	CRect CacheRect;
	void SetCacheSize(SIZE sz) {
		if (CacheRect.IsRectNull()) 
			CacheRect=CRect(CPoint(0,0),sz);
	}

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CCachedScrollView)
	protected:
	virtual void OnDraw(CDC* pDC);      // overridden to draw this view
	virtual void OnInitialUpdate();     // first time after construct
	//}}AFX_VIRTUAL
private:
   CBitmap CacheBitmap;
protected:
	virtual ~CCachedScrollView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif
	// Generated message map functions
	//{{AFX_MSG(CCachedScrollView)
	afx_msg void OnPaint();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_CACHEDSCROLLVIEW_H__E4A869C6_123A_4D16_9D9C_2B4C0EDEE257__INCLUDED_)