public TreeItemViewModel(TreeItemViewModel parent, bool lazyLoadChildren)
{
this.parent = parent;
children = new ObservableCollection<TreeItemViewModel>();
if (lazyLoadChildren)
children.Add(DummyChild);
}
public MainWindow()
{
InitializeComponent();
ShowSecondCheck_Checked(null, null);
// Create some example nodes to play with
var rootNode = new TreeItemViewModel(null, false) { DisplayName = "rootNode" };
var node1 = new TreeItemViewModel(rootNode, false) { DisplayName = "element1 (editable)", IsEditable = true };
var node2 = new TreeItemViewModel(rootNode, false) { DisplayName = "element2" };
var node11 = new TreeItemViewModel(node1, false) { DisplayName = "element11", Remarks = "Look at me!" };
var node12 = new TreeItemViewModel(node1, false) { DisplayName = "element12 (disabled)", IsEnabled = false };
var node13 = new TreeItemViewModel(node1, false) { DisplayName = "element13" };
var node131 = new TreeItemViewModel(node13, false) { DisplayName = "element131" };
var node132 = new TreeItemViewModel(node13, false) { DisplayName = "element132" };
var node14 = new TreeItemViewModel(node1, false) { DisplayName = "element14 with colours" };
var colorNode1 = new ColorItemViewModel(node14, false) { Color = Colors.Aqua, IsEditable = true };
var colorNode2 = new ColorItemViewModel(node14, false) { Color = Colors.ForestGreen };
var colorNode3 = new ColorItemViewModel(node14, false) { Color = Colors.LightSalmon };
var node15 = new TreeItemViewModel(node1, true) { DisplayName = "element15 (lazy loading)" };
// Add them all to each other
rootNode.Children.Add(node1);
rootNode.Children.Add(node2);
node1.Children.Add(node11);
node1.Children.Add(node12);
node1.Children.Add(node13);
node13.Children.Add(node131);
node13.Children.Add(node132);
node1.Children.Add(node14);
node14.Children.Add(colorNode1);
node14.Children.Add(colorNode2);
node14.Children.Add(colorNode3);
node1.Children.Add(node15);
// Use the root node as the window's DataContext to allow data binding. The TreeView
// will use the Children property of the DataContext as list of root tree items. This
// property happens to be the same as each item DataTemplate uses to find its subitems.
DataContext = rootNode;
// Preset some node states
node1.IsSelected = true;
node13.IsSelected = true;
node14.IsExpanded = true;
}
public ColorItemViewModel(TreeItemViewModel parent, bool lazyLoadChildren)
: base(parent, lazyLoadChildren)
{
Color = Colors.Silver;
}
private void DoSelectAll(TreeItemViewModel node, Func<TreeItemViewModel, bool> selector)
{
node.IsSelected = selector(node);
if (node.Children != null)
{
foreach (var child in node.Children)
{
DoSelectAll(child, selector);
}
}
}
public ColorItemViewModel(TreeItemViewModel parent, bool lazyLoadChildren)
: base(parent, lazyLoadChildren)
{
Color = Colors.Silver;
}