/// <summary> /// HeaderProperty property changed handler. /// </summary> /// <param name="d"> /// HeaderedItemsControl that changed its Header. /// </param> /// <param name="e">Event arguments.</param> private static void OnHeaderPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { HeaderedItemsControl source = d as HeaderedItemsControl; source.OnHeaderChanged(e.OldValue, e.NewValue); }
/// <summary> /// Prepare a PrepareHeaderedItemsControlContainer container for an /// item. /// </summary> /// <param name="control">Container to prepare.</param> /// <param name="item">Item to be placed in the container.</param> /// <param name="parentItemsControl">The parent ItemsControl.</param> /// <param name="parentItemContainerStyle"> /// The ItemContainerStyle for the parent ItemsControl. /// </param> private static void PrepareHeaderedItemsControlContainer(HeaderedItemsControl control, object item, ItemsControl parentItemsControl, Style parentItemContainerStyle) { if (control != item) { // Copy the ItemsControl properties from parent to child DataTemplate parentItemTemplate = parentItemsControl.ItemTemplate; if (parentItemTemplate != null) { control.SetValue(HeaderedItemsControl.ItemTemplateProperty, parentItemTemplate); } if (parentItemContainerStyle != null && HasDefaultValue(control, HeaderedItemsControl.ItemContainerStyleProperty)) { control.SetValue(HeaderedItemsControl.ItemContainerStyleProperty, parentItemContainerStyle); } // Copy the Header properties from parent to child if (control.HeaderIsItem || HasDefaultValue(control, HeaderedItemsControl.HeaderProperty)) { control.Header = item; control.HeaderIsItem = true; } if (parentItemTemplate != null) { control.SetValue(HeaderedItemsControl.HeaderTemplateProperty, parentItemTemplate); } if (parentItemContainerStyle != null && control.Style == null) { control.SetValue(HeaderedItemsControl.StyleProperty, parentItemContainerStyle); } // Note: this is where we would apply the HeaderTemplateSelector // (if implemented) or attempt to lookup the implicit template // for the type of the item if the headerTemplate were null. // Setup a hierarchical template HierarchicalDataTemplate headerTemplate = parentItemTemplate as HierarchicalDataTemplate; if (headerTemplate != null) { if (headerTemplate.ItemsSource != null && HasDefaultValue(control, HeaderedItemsControl.ItemsSourceProperty)) { control.SetBinding( HeaderedItemsControl.ItemsSourceProperty, new Binding { Converter = headerTemplate.ItemsSource.Converter, ConverterCulture = headerTemplate.ItemsSource.ConverterCulture, ConverterParameter = headerTemplate.ItemsSource.ConverterParameter, Mode = headerTemplate.ItemsSource.Mode, NotifyOnValidationError = headerTemplate.ItemsSource.NotifyOnValidationError, Path = headerTemplate.ItemsSource.Path, Source = control.Header, ValidatesOnExceptions = headerTemplate.ItemsSource.ValidatesOnExceptions }); } if (headerTemplate.IsItemTemplateSet && control.ItemTemplate == parentItemTemplate) { control.ClearValue(HeaderedItemsControl.ItemTemplateProperty); if (headerTemplate.ItemTemplate != null) { control.ItemTemplate = headerTemplate.ItemTemplate; } } if (headerTemplate.IsItemContainerStyleSet && control.ItemContainerStyle == parentItemContainerStyle) { control.ClearValue(HeaderedItemsControl.ItemContainerStyleProperty); if (headerTemplate.ItemContainerStyle != null) { control.ItemContainerStyle = headerTemplate.ItemContainerStyle; } } } } }