public VideoKeyframesWindow GetThumbsWindow()
{
if (_videoKeyframesWindow == null)
{
_videoKeyframesWindow = _videoThumbsWindowCreator();
_videoKeyframesWindow.FormClosed += new FormClosedEventHandler(ThumbsFormClosed);
_videoKeyframesWindow.KeyframeSourceTree = _headerTree;
}
return(_videoKeyframesWindow);
}
private void ThumbsFormClosed(object sender, FormClosedEventArgs e)
{
_videoKeyframesWindow.FormClosed -= new FormClosedEventHandler(ThumbsFormClosed);
_videoKeyframesWindow = null;
}