尝试将应用程序边缘移动到屏幕限制之外时，如何停止移动它的边缘?

问题描述

我现在使用以下代码移动窗口并绘制背景窗口，当我将窗口移动到屏幕边缘时，应用程序的背景(位图类型的图片)受到干扰.如何解决此问题? lang ="c ++"> void CDemoDlg :: OnLButtonDown(UINT nFlags，CPoint点){// TODO:在此处添加消息处理程序代码和/或调用默认值创建myRect；GetWindowRect(& myRect); // 保存当前光标坐标GetCursorPos(& point);// ScreenToClient(& point); SendMessage(WM_NCLBUTTONDOWN，HTCAPTION， 0 ); __ super :: OnLButtonDown(nFlags，point);} 无效 CDemoDlg :: OnMouseMove(UINT nFlags，CPoint点){// TODO:在此处添加消息处理程序代码和/或调用默认值创建myRect；GetWindowRect(& myRect);CPoint固化点；GetCursorPos(& curpoint); { MoveWindow(curpoint.x-point.x，curpoint.y-point.y，myRect.right-myRect.left，myRect.bottom-myRect.top，TRUE); } __ super :: OnMouseMove(nFlags，point);}无效 CDemoDlg :: OnPaint(){如果(IsIconic()){CPaintDC dc(此); // 用于绘画的设备上下文SendMessage(WM_ICONERASEBKGND，(WPARAM)dc.GetSafeHdc()， 0 );// 客户端矩形中的中心图标 int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(& rect); int x =(rect.Width()-cxIcon + 1 )/ 2 ; int y =(rect.Height()-cyIcon + 1 )/ 2 ;// 绘制图标dc.DrawIcon(x，y，m_hIcon);}其他{CPaintDC dc(此);CRect rect;GetClientRect(& rect);// ScreenToClient(rect); 位图bmp;HBITMAP hBmp = :: LoadBitmap(:: AfxGetInstanceHandle()，MAKEINTRESOURCE(IDB_MAIN_BG));:: GetObject(hBmp， sizeof (bmp)，& bmp);HDC hDC = :: CreateCompatibleDC(NULL);SelectObject(hDC，hBmp);:: BitBlt(dc.m_hDC， 0 ， 0 ，rect.Width()，rect.Height( )，hDC， 0 ， 0 ，SRCCOPY)；CDialog :: OnPaint();}}

当我使用鼠标事件将应用程序移出屏幕限制"之外时，这会引起问题.如何停止超出屏幕限制的应用程序边缘.

解决方案

I have used the following codes to move window and paint the background window now when I move window to edges of the screen the background of my application which is a picture of bitmap type gets disturbed.How to solve this problem?

void CDemoDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default

	 CRect myRect;
	 GetWindowRect(&myRect);
              //save current cursor coordinate
		GetCursorPos(&point);
		//ScreenToClient(&point);
		SendMessage(WM_NCLBUTTONDOWN, HTCAPTION, 0);
	__super::OnLButtonDown(nFlags, point);
}
 
void CDemoDlg::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default

	CRect myRect;
	 GetWindowRect( &myRect);
	 CPoint curpoint;
	 GetCursorPos(&curpoint);
     {     
           MoveWindow(curpoint.x - point.x, curpoint.y - point.y, 
			myRect.right - myRect.left, myRect.bottom - myRect.top, TRUE);
     }
	
	 __super::OnMouseMove(nFlags, point);
}
void CDemoDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		
		CPaintDC dc(this);
		CRect rect;
		GetClientRect(&rect);
		//ScreenToClient(rect);
		BITMAP bmp;
		HBITMAP hBmp = ::LoadBitmap(::AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_MAIN_BG));
		::GetObject(hBmp, sizeof(bmp), &bmp);
		HDC hDC = ::CreateCompatibleDC(NULL);
		SelectObject(hDC, hBmp);
		::BitBlt(dc.m_hDC, 0, 0, rect.Width(), rect.Height(), hDC, 0, 0, SRCCOPY);
		CDialog::OnPaint();
	}

}

Its causing problem when I move the app with mouse event out side the screen Limits. How can I stop the app edges crossing the screen limits.

解决方案

这篇关于尝试将应用程序边缘移动到屏幕限制之外时，如何停止移动它的边缘?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！