/// <summary>
/// Detaches listeners
/// </summary>
private void RemoveListeners(StringFormatContainer cont)
{
cont.CollectionChanged -= _valuesChangedHandler;
_dpdValue.RemoveValueChanged(cont, _valueChangedHandler);
_dpdValues.RemoveValueChanged(cont, _valueChangedHandler);
_dpdStringFormat.RemoveValueChanged(cont, _valueChangedHandler);
}
/// <summary>
/// Activates bindings and adds change listeners
/// </summary>
private void AttachBindings(StringFormatContainer cont)
{
// recreate all bindings
ActivateBinding(cont, StringFormatContainer.ValueProperty);
ActivateBinding(cont, StringFormatContainer.ValuesProperty);
ActivateBinding(cont, StringFormatContainer.StringFormatProperty);
// recursive call
foreach (var v in cont.Values)
{
AttachBindings(v);
}
AddListeners(cont);
}
/// <summary>
/// Adds listeners for changes in the Content
/// </summary>
private void AddListeners(StringFormatContainer cont)
{
// listen for changes in the bindings of the StringFormatContainer
_dpdValue.AddValueChanged(cont, _valueChangedHandler);
_dpdValues.AddValueChanged(cont, _valueChangedHandler);
_dpdStringFormat.AddValueChanged(cont, _valueChangedHandler);
// prevent memory leaks
cont.Unloaded += (s, e) =>
{
_dpdValue.RemoveValueChanged(cont, _valueChangedHandler);
_dpdValues.RemoveValueChanged(cont, _valueChangedHandler);
_dpdStringFormat.RemoveValueChanged(cont, _valueChangedHandler);
};
}
/// <summary>
/// Attaches listeners for changes in the Content tree
/// </summary>
private void AddListeners(StringFormatContainer cont)
{
// in case they have been added before
RemoveListeners(cont);
// listen for changes to values collection
cont.CollectionChanged += _valuesChangedHandler;
// listen for changes in the bindings of the StringFormatContainer
_dpdValue.AddValueChanged(cont, _valueChangedHandler);
_dpdValues.AddValueChanged(cont, _valueChangedHandler);
_dpdStringFormat.AddValueChanged(cont, _valueChangedHandler);
// prevent memory leaks
cont.Unloaded += delegate { RemoveListeners(cont); };
foreach (var c in cont.Values)
{
AddListeners(c); // recursive
}
}
