/// <summary>
/// Document we are tracking selection on is closing, ensure we clean everything up.
/// </summary>
private void OnDocumentClosing(object sender, EventArgs args)
{
Debug.Assert(_currentDocData != null, "null docData in DocumentClosing event");
if (_currentDocData != null)
{
try
{
// clear tree data, causes event handlers to be removed from our branches.
if (_treeProvider != null)
{
_treeProvider.Root = null;
}
// clear cached selection
_currentSelection = null;
_currentBrowseObject = null;
// disable column event handlers
Debug.Assert(_currentDocData.Store != null, "unable to remove column event handlers");
if (_currentDocData.Store != null)
{
_treeControl.RemoveColumnEventHandlers();
}
// NOTE: It's important to cast here, otherwise a wrong overload would be called
// and selection container would not be cleared leading to strange problems - e.g.
// properties window might call refresh on disposed store etc.
DoSelectionChanged((object)null);
}
finally
{
// Unsubscribe from document closing event
_currentDocData.DocumentClosing -= OnDocumentClosing;
_currentDocData = null;
}
}
}
