www.pudn.com > Poly.rar > ScrollAssist.h

// ScrollAssist.h: interface for the CScrollAssist class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#if !defined(AFX_SCROLLASSIST_H__3BA6A125_E3B9_48C4_BF2A_6EBAACFB6432__INCLUDED_) 
#define AFX_SCROLLASSIST_H__3BA6A125_E3B9_48C4_BF2A_6EBAACFB6432__INCLUDED_ 
 
#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 
#include "datadef.h" 
class CScrollAssist_zhang   
{ 
public: 
	CScrollAssist_zhang(); 
	virtual ~CScrollAssist_zhang(); 
	public: 
	void Change(CPoint centerPoint,CSize clientSize,CSize imageSize,float zoom); 
	void Change(int cx,int cy,CSize size,float zoom); 
	bool OnVScroll(UINT nSBCode,UINT nPos); // if handled, return true 
	bool OnHScroll(UINT nSBCode,UINT nPos);	// if handled, return true 
	void OnCreate(CWnd *pwnd); 
	void ResetScroll(); 
	int  GetScrollPos( int nBar ); 
	void SetBothPos(int x,int y); 
	void SetStep(int step); 
	short Undo(float* zoom); 
	int  GetUndoSum(){ return m_curUndo; } 
	CSize GetScrollRange()	{ return ScrollRange;} 
	void SetLastOP(); 
	void ClearUndo(){ m_curUndo = 0; } 
 
private: 
	CWnd	*m_pwnd; 
	int		VPosHi,HPosHi,VPosLow,HPosLow; 
	CSize	ScrollRange; 
	int		ScrollStep; 
	float	m_zoom; 
 
	// Used for undo 
	strUNDO m_Undo[10]; 
	int		m_curUndo; 
 
}; 
 
#endif // !defined(AFX_SCROLLASSIST_H__3BA6A125_E3B9_48C4_BF2A_6EBAACFB6432__INCLUDED_)