TrackMouseEven示例讲解

TrackMouseEven这里讲两个功能：

1：当鼠标离开指定窗口时触发OnMouseLeave(WPARAM wParam, LPARAM lParam)；

2：当鼠标在指定窗口悬停指定时间（毫秒）后触发OnMouseHover(WPARAM wParam, LPARAM lParam)；

 

示例讲解，不罗嗦了：

1：建立一个对话框程序，关联一个类如：CTestTrackMouseEventDlg；

2：添加到

//{{AFX_MSG(CTestTrackMouseEventDlg)

   afx_msg void OnMouseLeave(WPARAM wParam = 0, LPARAM lParam = 0);
 afx_msg void OnMouseHover(WPARAM wParam = 0, LPARAM lParam = 0);

//}}AFX_MSG

3：

BEGIN_MESSAGE_MAP(CTestTrackMouseEventDlg, CDialog)
 //{{AFX_MSG_MAP(CTestTrackMouseEventDlg)
 ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
 ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover) 
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

4：

void CTestTrackMouseEventDlg::OnMouseLeave(WPARAM wParam, LPARAM lParam)
{
 //MessageBox("OnMouseLeave");

 static int i = 0 ;
 CString str; str.Format("OnMouseLeave %d",i++);

 SetWindowText( str );
 
}
void CTestTrackMouseEventDlg::OnMouseHover(WPARAM wParam, LPARAM lParam)
{
 //MessageBox("OnMouseHover");

 static int i = 0 ;
 CString str; str.Format("OnMouseHover %d",i++);

 SetWindowText( str ); 
}

 

5：

void CTestTrackMouseEventDlg::OnButton1OnMouseLeave() //鼠标离开对话框时，启动触发OnMouseHover；
{
 // TODO: Add your control notification handler code here
 
 TRACKMOUSEEVENT tme;  
 tme.cbSize = sizeof(TRACKMOUSEEVENT);  
 tme.hwndTrack =  this->m_hWnd;  
    tme.dwFlags = TME_LEAVE;
 
 _TrackMouseEvent(&tme); 
}
void CTestTrackMouseEventDlg::OnButton2OnMouseHover() //鼠标在对话框悬停是定时间，启动触发OnMouseHover；
{
 // TODO: Add your control notification handler code here
 TRACKMOUSEEVENT tme;  
 tme.cbSize = sizeof(TRACKMOUSEEVENT);  
 tme.hwndTrack = this->m_hWnd;  
    tme.dwFlags = TME_HOVER;
 tme.dwHoverTime = 1000;
 
 _TrackMouseEvent(&tme); 
}

 

 

6：//如果将以上两个触发函数添加到OnMouseMove消息函数中就可以实时监测鼠标了，当然不是必须的；

void CTestTrackMouseEventDlg::OnMouseMove(UINT nFlags, CPoint point)  //
{
 // TODO: Add your message handler code here and/or call default
 
  OnButton1OnMouseLeave();

  OnButton2OnMouseHover();

 CDialog::OnMouseMove(nFlags, point);
}