demo_changebmpview.h

可通过键盘上的-〉、<-和上移、下移键来控制图像输出百分比的情况

// Demo_ChangebmpView.h : interface of the CDemo_ChangebmpView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_DEMO_CHANGEBMPVIEW_H__5D596CAC_8969_11D4_B3C3_00001C5329C6__INCLUDED_)
#define AFX_DEMO_CHANGEBMPVIEW_H__5D596CAC_8969_11D4_B3C3_00001C5329C6__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CDemo_ChangebmpView : public CScrollView
{
protected: // create from serialization only
	CDemo_ChangebmpView();
	DECLARE_DYNCREATE(CDemo_ChangebmpView)

// Attributes
public:
	CDemo_ChangebmpDoc* GetDocument();

public:
	BOOL LoadBmpFromID(UINT nID);
	BOOL LoadBmpFromFile(CString szPathName);
	void Destroy();
	CPoint m_orgpoint;//显示位图的位置

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CDemo_ChangebmpView)
	public:
	virtual void OnDraw(CDC* pDC);  // overridden to draw this view
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	protected:
	virtual void OnInitialUpdate(); // called first time after construct
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CDemo_ChangebmpView();
#ifdef _DEBUG
	virtual void AssertValid() const;
	virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
	CBitmap* m_pBmp;
	BOOL	 bLoadBmpFromFile;
	CSize m_size;//位图的大小
	//{{AFX_MSG(CDemo_ChangebmpView)
	afx_msg void OnFileOpen();
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in Demo_ChangebmpView.cpp
inline CDemo_ChangebmpDoc* CDemo_ChangebmpView::GetDocument()
   { return (CDemo_ChangebmpDoc*)m_pDocument; }
#endif

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

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

#endif // !defined(AFX_DEMO_CHANGEBMPVIEW_H__5D596CAC_8969_11D4_B3C3_00001C5329C6__INCLUDED_)