/// <summary>
/// Creates a new thumbnail of a certain window.
/// </summary>
/// <param name="handle">Handle of the window to clone.</param>
/// <param name="region">Optional region.</param>
public void SetThumbnailHandle(WindowHandle handle, ThumbnailRegion region)
{
Log.WriteDetails("Setting new thumbnail",
"HWND {0}, region {1}", handle, region
);
if (_thumbnail != null && !_thumbnail.IsInvalid)
{
_thumbnail.Close();
_thumbnail = null;
}
//Attempt to get top level Form from Control
Form owner = this.TopLevelControl as Form;
if (owner == null)
{
throw new Exception("Internal error: ThumbnailPanel.TopLevelControl is not a Form.");
}
_labelGlass.Visible = false;
//Register new thumbnail, update regioning directly and refresh thumbnail
_thumbnail = DwmManager.Register(owner, handle.Handle);
_currentRegion = region;
_regionEnabled = (region != null);
UpdateThubmnail();
}