CWND对象,鼠标中键事件响应

CWND对象鼠标中键事件响应,除了重写相应的消息响应函数外,还有一个很重要的是该对象要获取焦点后才能响应,具体实现如下

 

.h文件

protected:
 //{{AFX_MSG(CChartRightRule)
 //NOTE - the ClassWizard will add and remove member function here.
 afx_msg void OnMouseMove(UINT nFlags, CPoint point);　　//用于设置僬点
 afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); 　　//具体的中键响应函数
 //}}AFX_MSG 

 DECLARE_MESSAGE_MAP()

 

.CPP文件

//关联

BEGIN_MESSAGE_MAP(CChartRightRule, CWnd)
 //{{AFX_MSG_MAP(CChartRightRule)
 //NOTE - the ClassWizard will add and remove mapping macros here.
 ON_WM_MOUSEMOVE()
 ON_WM_MOUSEWHEEL()
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

 

实现

void CChartRightRule::OnMouseMove(UINT nFlags, CPoint point)
{
 　　 this->SetFocus();  
}

 

 

BOOL CChartRightRule::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
 // TRACE("\r\nzDelta:%d", zDelta);
  if (zDelta < 0)  
   　　m_aRightRule.nMax -= 50;  //下滚
  else  
   　　m_aRightRule.nMax += 50; ////上滚
  
  //Invalidate();
  return CWnd::OnMouseWheel(nFlags, zDelta, pt);  
}