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@ -21,7 +21,7 @@ namespace Avalonia.Controls |
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/// </summary>
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public static readonly DirectProperty<TreeViewItem, bool> IsExpandedProperty = |
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AvaloniaProperty.RegisterDirect<TreeViewItem, bool>( |
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"IsExpanded", |
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nameof(IsExpanded), |
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o => o.IsExpanded, |
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(o, v) => o.IsExpanded = v); |
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@ -31,17 +31,25 @@ namespace Avalonia.Controls |
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public static readonly StyledProperty<bool> IsSelectedProperty = |
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ListBoxItem.IsSelectedProperty.AddOwner<TreeViewItem>(); |
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/// <summary>
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/// Defines the <see cref="Level"/> property.
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/// </summary>
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public static readonly DirectProperty<TreeViewItem, int> LevelProperty = |
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AvaloniaProperty.RegisterDirect<TreeViewItem, int>( |
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nameof(Level), o => o.Level); |
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private static readonly ITemplate<IPanel> DefaultPanel = |
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new FuncTemplate<IPanel>(() => new StackPanel()); |
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private TreeView _treeView; |
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private bool _isExpanded; |
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private int _level; |
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/// <summary>
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/// Initializes static members of the <see cref="TreeViewItem"/> class.
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/// </summary>
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static TreeViewItem() |
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{ |
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{ |
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SelectableMixin.Attach<TreeViewItem>(IsSelectedProperty); |
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FocusableProperty.OverrideDefaultValue<TreeViewItem>(true); |
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ItemsPanelProperty.OverrideDefaultValue<TreeViewItem>(DefaultPanel); |
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@ -65,6 +73,15 @@ namespace Avalonia.Controls |
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set { SetValue(IsSelectedProperty, value); } |
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} |
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/// <summary>
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/// Gets the level/indentation of the item.
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/// </summary>
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public int Level |
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{ |
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get { return _level; } |
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private set { SetAndRaise(LevelProperty, ref _level, value); } |
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} |
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/// <summary>
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/// Gets the <see cref="ITreeItemContainerGenerator"/> for the tree view.
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/// </summary>
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@ -89,6 +106,8 @@ namespace Avalonia.Controls |
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base.OnAttachedToLogicalTree(e); |
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_treeView = this.GetLogicalAncestors().OfType<TreeView>().FirstOrDefault(); |
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Level = CalculateDistanceFromLogicalParent<TreeView>(this) - 1; |
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if (ItemTemplate == null && _treeView?.ItemTemplate != null) |
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{ |
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ItemTemplate = _treeView.ItemTemplate; |
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@ -126,5 +145,18 @@ namespace Avalonia.Controls |
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// Don't call base.OnKeyDown - let events bubble up to containing TreeView.
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} |
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private static int CalculateDistanceFromLogicalParent<T>(ILogical logical, int @default = -1) where T : class |
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{ |
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var result = 0; |
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while (logical != null && logical.GetType() != typeof(T)) |
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{ |
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++result; |
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logical = logical.LogicalParent; |
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} |
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return logical != null ? result : @default; |
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} |
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} |
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} |
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Benedikt Schroeder
8 years ago
GitHub