/// <summary>
/// The DirectionProperty property changed handler.
/// </summary>
/// <param name="d">GridExpander that changed IsCollapsed.</param>
/// <param name="e">An instance of DependencyPropertyChangedEventArgs.</param>
private static void OnDirectionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
GridExpander s = d as GridExpander;
GridExpanderDirection value = (GridExpanderDirection)e.NewValue;
s.OnDirectionChanged(value);
}
/// <summary>
/// Handles the property change event of the Direction property.
/// </summary>
/// <param name="direction">The new value for the Direction property.</param>
protected virtual void OnDirectionChanged(GridExpanderDirection direction)
{
if (_expanderButton == null)
{
// There is no expander button so don't attempt to modify it
return;
}
// TODO: Use triggers for setting visibility conditionally instead of doing it here
if (direction == GridExpanderDirection.None)
{
// Hide the handles if the Direction is set to None.
_expanderButton.Visibility = Visibility.Collapsed;
}
else
{
// Ensure the handle is Visible.
_expanderButton.Visibility = Visibility.Visible;
}
}
/// <summary>
/// Handles the property change event of the Direction property.
/// </summary>
/// <param name="direction">The new value for the Direction property.</param>
protected virtual void OnDirectionChanged(GridExpanderDirection direction)
{
if (_expanderButton == null)
{
// There is no expander button so don't attempt to modify it
return;
}
// TODO: Use triggers for setting visibility conditionally instead of doing it here
if (direction == GridExpanderDirection.None)
{
// Hide the handles if the Direction is set to None.
_expanderButton.Visibility = Visibility.Collapsed;
}
else
{
// Ensure the handle is Visible.
_expanderButton.Visibility = Visibility.Visible;
}
}