new static void IsEnabledChanged(object sender, DependencyPropertyChangedEventArgs e)
{
Selector selector = sender as Selector;
bool enabled = (bool)e.NewValue;
if (selector != null)
{
DependencyPropertyDescriptor itemsSourceProperty =
DependencyPropertyDescriptor.FromProperty(Selector.ItemsSourceProperty, typeof(Selector));
IMultiSelectCollectionView collectionView = selector.ItemsSource as IMultiSelectCollectionView;
if (enabled)
{
if (collectionView != null)
{
collectionView.AddControl(selector, GetMaxNumSelectedItem(selector));
}
itemsSourceProperty.AddValueChanged(selector, ItemsSourceChanged);
}
else
{
if (collectionView != null)
{
collectionView.RemoveControl(selector);
}
itemsSourceProperty.RemoveValueChanged(selector, ItemsSourceChanged);
}
}
}
/// <summary>
/// Items the source changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
static void ItemsSourceChanged(object sender, EventArgs e)
{
Selector selector = sender as Selector;
if (selector == null)
{
return;
}
if (GetIsEnabled(selector))
{
IMultiSelectCollectionView oldCollectionView;
IMultiSelectCollectionView newCollectionView = selector.ItemsSource as IMultiSelectCollectionView;
_collectionViews.TryGetValue(selector, out oldCollectionView);
if (oldCollectionView != null)
{
oldCollectionView.RemoveControl(selector);
_collectionViews.Remove(selector);
}
if (newCollectionView != null)
{
newCollectionView.AddControl(selector);
_collectionViews.Add(selector, newCollectionView);
}
}
}
private static void ItemsSourceChanged(object sender, DependencyPropertyChangedEventArgs e)
{
Selector selector = sender as Selector;
if (GetIsEnabled(selector))
{
IMultiSelectCollectionView oldCollectionView = e.OldValue as IMultiSelectCollectionView;
IMultiSelectCollectionView newCollectionView = e.NewValue as IMultiSelectCollectionView;
oldCollectionView?.RemoveControl(selector);
newCollectionView?.AddControl(selector);
}
}
static void IsEnabledChanged(object sender, DependencyPropertyChangedEventArgs e)
{
Selector selector = sender as Selector;
IMultiSelectCollectionView collectionView = selector.ItemsSource as IMultiSelectCollectionView;
if (selector != null && collectionView != null)
{
if ((bool)e.NewValue)
{
collectionView.AddControl(selector);
}
else
{
collectionView.RemoveControl(selector);
}
}
}
private static void OnItemsSourceChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var selector = sender as Selector;
selector.ItemsSource = e.NewValue;
if (GetIsEnabled(selector))
{
IMultiSelectCollectionView oldCollectionView = TryGetMultiSelectCollectionView(e.OldValue);
IMultiSelectCollectionView newCollectionView = TryGetMultiSelectCollectionView(e.NewValue);
if (oldCollectionView != null)
{
oldCollectionView.RemoveControl(selector);
}
if (newCollectionView != null)
{
newCollectionView.AddControl(selector);
}
}
}
private static IMultiSelectCollectionView TryGetMultiSelectCollectionView(object obj)
{
IMultiSelectCollectionView collectionView = obj as IMultiSelectCollectionView;
return(collectionView);
}
