画出红色矩形框（还需修改）

来源：互联网发布：s1810打印机网络设置编辑：程序博客网时间：2024/06/10 06:27

void CVIDEO::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
CMainFrame* pMainFrm = (CMainFrame *)AfxGetApp()->GetMainWnd();

ClientToScreen(&point);
CRect rect;
GetDlgItem(IDC_STATIC1)->GetClientRect(rect);
GetDlgItem(IDC_STATIC1)->ClientToScreen(rect);

if ((pMainFrm->IsAviFile||pMainFrm->IsCamera)&&rect.PtInRect(point))
{
  startPoint=point;
  endPoint=point;
  selection=cvRect(point.x,point.y,0,0);
  drawingflag=TRUE;
  if (playflag) KillTimer(1);
}
CFormView::OnLButtonDown(nFlags, point);
}

void CVIDEO::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
if (!drawingflag)
  return;
CClientDC   dc(this);
dc.DPtoLP(&point); //映射每个点的坐标，或大小的尺寸，到GDI的逻辑坐标系统的设备坐标系统。
dc.SelectStockObject(NULL_BRUSH);

CPen pen, *oldPen;
pen.CreatePen(PS_SOLID,1,RGB(255,0,0));
oldPen =dc.SelectObject(&pen);

dc.SetROP2(R2_NOT);

dc.MoveTo(startPoint);
dc.LineTo(startPoint.x,endPoint.y);
dc.MoveTo(startPoint.x,endPoint.y);
dc.LineTo(endPoint);
dc.MoveTo(endPoint);
dc.LineTo(endPoint.x,startPoint.y);
dc.MoveTo(endPoint.x,startPoint.y);
dc.LineTo(startPoint);

endPoint=point;
dc.MoveTo(startPoint);
dc.LineTo(startPoint.x,endPoint.y);
dc.MoveTo(startPoint.x,endPoint.y);
dc.LineTo(endPoint);
dc.MoveTo(endPoint);
dc.LineTo(endPoint.x,startPoint.y);
dc.MoveTo(endPoint.x,startPoint.y);
dc.LineTo(startPoint);

dc.SelectObject(oldPen);

CFormView::OnMouseMove(nFlags, point);
}

void CVIDEO::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
if (drawingflag)
{
drawingflag=false;

  CClientDC   dc(this);
  dc.DPtoLP(&point);
  dc.SelectStockObject(NULL_BRUSH);

  CPen pen, *oldPen;
  pen.CreatePen(PS_SOLID,1,RGB(255,0,0));
  oldPen =dc.SelectObject(&pen);

  dc.SetROP2( R2_COPYPEN );
  dc.MoveTo(startPoint);
  dc.LineTo(startPoint.x,endPoint.y);
  dc.MoveTo(startPoint.x,endPoint.y);
  dc.LineTo(endPoint);
  dc.MoveTo(endPoint);
  dc.LineTo(endPoint.x,startPoint.y);
  dc.MoveTo(endPoint.x,startPoint.y);
  dc.LineTo(startPoint);

dc.SelectObject(oldPen);

  selection.width=abs(point.x-selection.x);
  selection.height=abs(point.y-selection.y);
  selectionflag=-1;
  if(playflag) SetTimer(1,m_fps,NULL);
}

CFormView::OnLButtonUp(nFlags, point);
}