private UpdateVisualState ( bool useTransitions ) : void | ||
useTransitions | bool | /// Indicates whether visual transitions should be used. /// |
Résultat | void |
/// <summary> /// Triggers the visual state changes and visual transitions /// to close the list out of selection mode. /// </summary> private void CloseSelection() { IList <WeakReference> items = ItemsControlExtensions.GetItemsInViewPort(this); //Only animate the containers in the view port. foreach (var i in items) { MultiselectItem item = (MultiselectItem)(((WeakReference)i).Target); item.State = SelectionEnabledState.Closed; item.UpdateVisualState(true); } Dispatcher.BeginInvoke(() => { for (int j = 0; j < this.Items.Count; j++) { MultiselectItem item = (MultiselectItem)ItemContainerGenerator.ContainerFromIndex(j); if (item != null) { item.State = SelectionEnabledState.Closed; item.UpdateVisualState(false); } } }); }
/// <summary> /// Resets new or reused item containers appropiately. /// </summary> /// <param name="element"></param> /// <param name="item"></param> protected override void PrepareContainerForItemOverride(DependencyObject element, object item) { base.PrepareContainerForItemOverride(element, item); MultiselectItem container = (MultiselectItem)element; container.Style = this.ItemContainerStyle; container._isBeingVirtualized = true; //Select or unselect item containers to put or clear checkmarks. container.IsSelected = SelectedItems.Contains(item); //Open or close item containers depending on the selection mode. container.State = IsSelectionEnabled ? SelectionEnabledState.Opened : SelectionEnabledState.Closed; container.UpdateVisualState(false); container._isBeingVirtualized = false; }