chore: use file-scoped namespace
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@@ -7,161 +7,160 @@ using System.Windows.Controls;
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using System.Windows.Markup;
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using HandyControl.Data;
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namespace HandyControl.Controls
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namespace HandyControl.Controls;
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/// <summary>
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/// ItemsControl的轻量级版本
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/// </summary>
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[DefaultProperty("Items")]
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[ContentProperty("Items")]
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[TemplatePart(Name = ElementPanel, Type = typeof(Panel))]
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public class SimpleItemsControl : Control
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{
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/// <summary>
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/// ItemsControl的轻量级版本
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/// </summary>
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[DefaultProperty("Items")]
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[ContentProperty("Items")]
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[TemplatePart(Name = ElementPanel, Type = typeof(Panel))]
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public class SimpleItemsControl : Control
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private const string ElementPanel = "PART_Panel";
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public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register(
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"ItemTemplate", typeof(DataTemplate), typeof(SimpleItemsControl),
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new FrameworkPropertyMetadata(default(DataTemplate), OnItemTemplateChanged));
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public static readonly DependencyProperty ItemContainerStyleProperty = DependencyProperty.Register(
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"ItemContainerStyle", typeof(Style), typeof(SimpleItemsControl),
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new PropertyMetadata(default(Style), OnItemContainerStyleChanged));
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public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register(
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"ItemsSource", typeof(IEnumerable), typeof(SimpleItemsControl),
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new PropertyMetadata(default(IEnumerable), OnItemsSourceChanged));
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public SimpleItemsControl()
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{
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private const string ElementPanel = "PART_Panel";
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public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register(
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"ItemTemplate", typeof(DataTemplate), typeof(SimpleItemsControl),
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new FrameworkPropertyMetadata(default(DataTemplate), OnItemTemplateChanged));
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public static readonly DependencyProperty ItemContainerStyleProperty = DependencyProperty.Register(
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"ItemContainerStyle", typeof(Style), typeof(SimpleItemsControl),
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new PropertyMetadata(default(Style), OnItemContainerStyleChanged));
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public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register(
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"ItemsSource", typeof(IEnumerable), typeof(SimpleItemsControl),
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new PropertyMetadata(default(IEnumerable), OnItemsSourceChanged));
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public SimpleItemsControl()
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var items = new ObservableCollection<object>();
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items.CollectionChanged += (s, e) =>
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{
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var items = new ObservableCollection<object>();
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items.CollectionChanged += (s, e) =>
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if (e.NewItems != null && e.NewItems.Count > 0)
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{
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if (e.NewItems != null && e.NewItems.Count > 0)
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{
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SetValue(HasItemsPropertyKey, ValueBoxes.TrueBox);
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}
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OnItemsChanged(s, e);
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};
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Items = items;
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}
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public IEnumerable ItemsSource
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{
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get => (IEnumerable) GetValue(ItemsSourceProperty);
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set => SetValue(ItemsSourceProperty, value);
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}
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[Bindable(true)]
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[Category("Content")]
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public Style ItemContainerStyle
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{
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get => (Style) GetValue(ItemContainerStyleProperty);
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set => SetValue(ItemContainerStyleProperty, value);
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}
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[Bindable(true)]
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public DataTemplate ItemTemplate
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{
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get => (DataTemplate) GetValue(ItemTemplateProperty);
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set => SetValue(ItemTemplateProperty, value);
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}
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Bindable(true)]
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public Collection<object> Items { get; }
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internal Panel ItemsHost { get; set; }
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private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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((SimpleItemsControl) d).OnItemsSourceChanged((IEnumerable) e.OldValue, (IEnumerable) e.NewValue);
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}
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protected virtual void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
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{
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}
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public override void OnApplyTemplate()
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{
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ItemsHost?.Children.Clear();
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base.OnApplyTemplate();
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ItemsHost = GetTemplateChild(ElementPanel) as Panel;
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Refresh();
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}
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protected virtual void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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Refresh();
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UpdateItems();
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}
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protected virtual DependencyObject GetContainerForItemOverride() => new ContentPresenter();
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protected virtual bool IsItemItsOwnContainerOverride(object item) => item is ContentPresenter;
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protected virtual void PrepareContainerForItemOverride(DependencyObject element, object item)
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{
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switch (element)
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{
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case ContentControl contentControl:
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contentControl.Content = item;
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contentControl.ContentTemplate = ItemTemplate;
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break;
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case ContentPresenter contentPresenter:
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contentPresenter.Content = item;
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contentPresenter.ContentTemplate = ItemTemplate;
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break;
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SetValue(HasItemsPropertyKey, ValueBoxes.TrueBox);
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}
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}
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OnItemsChanged(s, e);
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};
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Items = items;
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}
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private static void OnItemTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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=> (d as SimpleItemsControl)?.OnItemTemplateChanged(e);
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public IEnumerable ItemsSource
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{
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get => (IEnumerable) GetValue(ItemsSourceProperty);
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set => SetValue(ItemsSourceProperty, value);
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}
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protected virtual void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e) => Refresh();
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[Bindable(true)]
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[Category("Content")]
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public Style ItemContainerStyle
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{
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get => (Style) GetValue(ItemContainerStyleProperty);
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set => SetValue(ItemContainerStyleProperty, value);
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}
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private static void OnItemContainerStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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=> (d as SimpleItemsControl)?.OnItemContainerStyleChanged(e);
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[Bindable(true)]
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public DataTemplate ItemTemplate
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{
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get => (DataTemplate) GetValue(ItemTemplateProperty);
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set => SetValue(ItemTemplateProperty, value);
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}
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protected virtual void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e) => Refresh();
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Bindable(true)]
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public Collection<object> Items { get; }
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internal static readonly DependencyPropertyKey HasItemsPropertyKey =
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DependencyProperty.RegisterReadOnly(nameof(HasItems), typeof(bool), typeof(SimpleItemsControl),
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new PropertyMetadata(ValueBoxes.FalseBox));
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internal Panel ItemsHost { get; set; }
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public static readonly DependencyProperty HasItemsProperty = HasItemsPropertyKey.DependencyProperty;
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private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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((SimpleItemsControl) d).OnItemsSourceChanged((IEnumerable) e.OldValue, (IEnumerable) e.NewValue);
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}
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public bool HasItems => (bool) GetValue(HasItemsProperty);
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protected virtual void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
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{
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}
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protected virtual void Refresh()
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{
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if (ItemsHost == null) return;
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public override void OnApplyTemplate()
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{
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ItemsHost?.Children.Clear();
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ItemsHost.Children.Clear();
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foreach (var item in Items)
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{
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DependencyObject container;
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if (IsItemItsOwnContainerOverride(item))
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{
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container = item as DependencyObject;
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}
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else
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{
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container = GetContainerForItemOverride();
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PrepareContainerForItemOverride(container, item);
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}
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base.OnApplyTemplate();
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if (container is FrameworkElement element)
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{
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element.Style = ItemContainerStyle;
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ItemsHost.Children.Add(element);
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}
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}
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}
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ItemsHost = GetTemplateChild(ElementPanel) as Panel;
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Refresh();
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}
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protected virtual void UpdateItems()
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protected virtual void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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Refresh();
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UpdateItems();
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}
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protected virtual DependencyObject GetContainerForItemOverride() => new ContentPresenter();
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protected virtual bool IsItemItsOwnContainerOverride(object item) => item is ContentPresenter;
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protected virtual void PrepareContainerForItemOverride(DependencyObject element, object item)
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{
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switch (element)
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{
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case ContentControl contentControl:
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contentControl.Content = item;
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contentControl.ContentTemplate = ItemTemplate;
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break;
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case ContentPresenter contentPresenter:
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contentPresenter.Content = item;
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contentPresenter.ContentTemplate = ItemTemplate;
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break;
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}
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}
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}
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private static void OnItemTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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=> (d as SimpleItemsControl)?.OnItemTemplateChanged(e);
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protected virtual void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e) => Refresh();
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private static void OnItemContainerStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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=> (d as SimpleItemsControl)?.OnItemContainerStyleChanged(e);
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protected virtual void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e) => Refresh();
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internal static readonly DependencyPropertyKey HasItemsPropertyKey =
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DependencyProperty.RegisterReadOnly(nameof(HasItems), typeof(bool), typeof(SimpleItemsControl),
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new PropertyMetadata(ValueBoxes.FalseBox));
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public static readonly DependencyProperty HasItemsProperty = HasItemsPropertyKey.DependencyProperty;
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public bool HasItems => (bool) GetValue(HasItemsProperty);
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protected virtual void Refresh()
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{
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if (ItemsHost == null) return;
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ItemsHost.Children.Clear();
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foreach (var item in Items)
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{
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DependencyObject container;
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if (IsItemItsOwnContainerOverride(item))
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{
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container = item as DependencyObject;
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}
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else
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{
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container = GetContainerForItemOverride();
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PrepareContainerForItemOverride(container, item);
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}
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if (container is FrameworkElement element)
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{
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element.Style = ItemContainerStyle;
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ItemsHost.Children.Add(element);
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}
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}
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}
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protected virtual void UpdateItems()
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{
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}
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}
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