基于对话框的绘图程序(vc)

来源：互联网发布：软件编程程序培训机构编辑：程序博客网时间：2024/06/06 06:54

最近没事写几行代码，拿来分享一下，很简单的利用鼠标画图：IsDraging是鼠标拖拽的标志，IsRect是菜单标记（判断是否单击菜单）

初始化：

IsDraging=false;
IsRect=false;
m_hCross=AfxGetApp()->LoadStandardCursor(IDC_CROSS);

其它程序：

if(IsDraging)
{
  CClientDC dc1(this);
  //GetClientRect(&rectangle);
  CPen lpen(PS_SOLID,2,RGB(255,0,0));
  dc1.SelectObject(&lpen);
  dc1.Rectangle(rectangle.left,rectangle.top,rectangle.right,rectangle.bottom);

}

void CToolTipDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
if(IsRect)
{
  SetCapture();
  ::SetCursor(m_hCross);
  rectangle.left=point.x;
  rectangle.top=point.y;

  IsDraging=true;
}

CDialog::OnLButtonDown(nFlags, point);
}

void CToolTipDlg::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
if(IsDraging&&IsRect)
{
  rectangle.right=point.x;
  rectangle.bottom=point.y;
  Invalidate();
}

CDialog::OnMouseMove(nFlags, point);
}

void CToolTipDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
if(IsDraging&&IsRect)
{
  rectangle.right=point.x;
  rectangle.bottom=point.y;
  ReleaseCapture();
  IsDraging=false;

  //IsRect=false;

}

CDialog::OnLButtonUp(nFlags, point);
}