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? [英] how to stop moving app edges when its tried to move outside the screen limits?
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 )/ int y =(rect.Height()-cyIcon + 1 )/// 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.
您需要在CDemoDlg::OnMouseMove()
函数中添加检查以查看是否有任何Windows边缘掉了超出屏幕边缘,并在必要时将其调整回内部.
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.
You need to add a check in your CDemoDlg::OnMouseMove()
function to see if any of your windows edges go beyond the edge of the screen and adjust them back inside if necessary.
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