public void UpdateIndex() { if (Owner is TreeView treeViewOwner && Index == null) { Index = new TreeContainerIndex(); _treeView = treeViewOwner; }
/// <summary> /// Initializes a new instance of the <see cref="TreeItemContainerGenerator{T}"/> class. /// </summary> /// <param name="owner">The owner control.</param> /// <param name="contentProperty">The container's Content property.</param> /// <param name="contentTemplateProperty">The container's ContentTemplate property.</param> /// <param name="itemsProperty">The container's Items property.</param> /// <param name="isExpandedProperty">The container's IsExpanded property.</param> /// <param name="index">The container index for the tree</param> public TreeItemContainerGenerator( IControl owner, AvaloniaProperty contentProperty, AvaloniaProperty contentTemplateProperty, AvaloniaProperty itemsProperty, AvaloniaProperty isExpandedProperty, TreeContainerIndex index) : base(owner, contentProperty, contentTemplateProperty) { Contract.Requires <ArgumentNullException>(owner != null); Contract.Requires <ArgumentNullException>(contentProperty != null); Contract.Requires <ArgumentNullException>(itemsProperty != null); Contract.Requires <ArgumentNullException>(isExpandedProperty != null); Contract.Requires <ArgumentNullException>(index != null); ItemsProperty = itemsProperty; IsExpandedProperty = isExpandedProperty; Index = index; }