/// --------------------------------------------------------------------------------
/// <summary></summary>
/// <param name="m">message to be filtered</param>
/// <returns>true if the message is consumed, false to pass it on.</returns>
/// --------------------------------------------------------------------------------
public bool PreFilterMessage(ref Message m)
{
CheckDisposed();
switch ((Win32.WinMsgs)m.Msg)
{
case Win32.WinMsgs.WM_NCLBUTTONDOWN:
case Win32.WinMsgs.WM_NCLBUTTONUP:
case Win32.WinMsgs.WM_LBUTTONDOWN:
{
// Make sure the popuptree hasn't been disposed of with out setting
// the m_popupTree variable to null:
if (m_popupTree.IsDisposed)
{
return(false); // default case
}
// Handle any mouse left button activity.
// Non-client areas include the title bar, menu bar, window borders,
// and scroll bars. But the only one in our combo is the scroll bar.
Control c = Control.FromHandle(m.HWnd);
// Clicking anywhere in an FwListBox, including it's scroll bar,
// behaves normally.
if ((c == m_popupTree.m_treeView))
{
return(false);
}
// Any other click is captured and causes the list box to go away.
// Only do this if the popup tree is visible
if (m_popupTree.Visible)
{
m_popupTree.Hide();
return(true);
}
return(false);
}
default:
return(false);
}
}
internal void HideTree()
{
CheckDisposed();
m_popupTree.Hide();
}