WM_MOUSELEAVE 消息

最新推荐文章于 2016-09-23 14:59:58 发布

aa1991

最新推荐文章于 2016-09-23 14:59:58 发布

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分类专栏： MFC

本文链接：https://blog.youkuaiyun.com/aa1991/article/details/9465375

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本文介绍了Windows程序中如何处理鼠标事件，包括鼠标左键点击、鼠标移出窗口及文件拖拽等事件的具体实现方法。文章详细展示了如何通过TrackMouseEvent函数追踪鼠标状态以响应WM_MOUSELEAVE消息。

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void CroundDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default
	
	CDialogEx::OnLButtonDown(nFlags, point);
	PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x, point.y));
	if(m_flag)
	{
		m_funcdlg.ShowWindow(SW_HIDE);
		m_flag = false;
	}
}

WM_MOUSELEAVE 消息不同于其他消息，只有调用函数TrackMouseEvent追踪当前鼠标状态，才会响应它，并且调用一次只响应一次，所以每次想响应WM_MOUSELEAVE消息，必须调用TrackMouseEvent函数，故此函数一般放在OnMouseMove函数中。示例如下：
void CroundDlg::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default
	if(m_flag)
	{
		::GetWindowRect(this->m_hWnd,&m_Clientrc); //屏幕坐标
		::GetWindowRect(m_funcdlg.m_hWnd, &m_Toolrc); //客户区坐标
		int ScreenHeight = GetSystemMetrics(SM_CYSCREEN); //获取屏幕高度
		//判断图形界面在上面还是下面显示
		if(ScreenHeight - m_Clientrc.top > 2*m_Toolrc.Height())
		{
			m_funcdlg.MoveWindow(m_Clientrc.left-m_Toolrc.Width(),m_Clientrc.top+40,
								m_Toolrc.Width(), m_Toolrc.Height());
		}
		else
		{
			m_funcdlg.MoveWindow(m_Clientrc.left-m_Toolrc.Width(),m_Clientrc.top-m_Toolrc.Height()+20,
								m_Toolrc.Width(), m_Toolrc.Height());
		}
		m_funcdlg.ShowWindow(SW_SHOW);
		if(m_bMouseTrack)
		{
			TRACKMOUSEEVENT csTME;
			csTME.cbSize = sizeof(csTME);
			csTME.dwFlags = TME_LEAVE;
			csTME.hwndTrack = this->m_hWnd;
			csTME.dwHoverTime = 1000;
			::_TrackMouseEvent(&csTME);
			m_bMouseTrack = TRUE;
		}
		//m_flag = true;
void CroundDlg::OnMouseLeave()  //鼠标离开响应函数
{
	// TODO: Add your message handler code here and/or call default
	if(g_dragflag)
	{
		m_funcdlg.ShowWindow(SW_HIDE);
		m_bMouseTrack = TRUE;
		m_flag = TRUE;
		//g_dragflag = true;
	}
void CroundDlg::OnDropFiles(HDROP hDropInfo)  //鼠标响应文件拖拽函数
{
	// TODO: Add your message handler code here and/or call default
	
	
	::GetWindowRect(this->m_hWnd,&m_Clientrc); //屏幕坐标
	::GetWindowRect(m_funcdlg.m_hWnd, &m_Toolrc); //客户区坐标
	int ScreenHeight = GetSystemMetrics(SM_CYSCREEN); //获取屏幕高度
	//判断图形界面在上面还是下面显示
	if(ScreenHeight - m_Clientrc.top > 2*m_Toolrc.Height())
	{
		
		
		m_funcdlg.MoveWindow(m_Clientrc.left-m_Toolrc.Width(),m_Clientrc.top+40,
								m_Toolrc.Width(), m_Toolrc.Height());
	}
	else
	{
		//this->ShowWindow(SW_HIDE);
		m_funcdlg.MoveWindow(m_Clientrc.left-m_Toolrc.Width(),m_Clientrc.top-m_Toolrc.Height()+20,
								m_Toolrc.Width(), m_Toolrc.Height());
	}
	this->ShowWindow(SW_HIDE);
	m_funcdlg.ShowWindow(SW_SHOW);
	TCHAR m_file[260]={0};
	int numfiles;
	numfiles = DragQueryFile(hDropInfo, 0xFFFFFFFF,NULL,0);
	m_mapFiles.clear();
	for(int i=0; i<numfiles; i++)
	{
		if(0 == DragQueryFile(hDropInfo, i, m_file, 260))
			continue;
		m_mapFiles[i] = m_file;
	}
	CString tmp;
	tmp.Format("%s\n%s", m_mapFiles[0], m_mapFiles[1]);
	//MessageBox(tmp);
	g_dragflag = false;
	CDialogEx::OnDropFiles(hDropInfo);
}
void CroundDlg::OnLButtonDown(UINT nFlags, CPoint point) //给标题发送wm_nclbuttondown消息，使其能够移动
{
// TODO: Add your message handler code here and/or call default

CDialogEx::OnLButtonDown(nFlags, point);
PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x, point.y));
if(m_flag)
{
m_funcdlg.ShowWindow(SW_HIDE);
m_flag = false;
}
}

http://www.cnblogs.com/stg609/articles/1226222.html