/// <summary>
/// Initialize tree control.
/// </summary>
public BaseTreeCtrl()
{
InitializeComponent();
DataContext = NodesTV = new TreeViewPageViewModel();
ContainerGrid.Children.Clear();
NodesTV.TreeItems?.Clear();
ContainerGrid.Children.Add(TV = (TreeView)this.TreeViewTemplate.LoadContent());
NodesTV.OnLoadChildrenAsync += BeforeExpand;
}
/// <summary>
/// Adds the current element to the collection of selected items.
/// </summary>
/// <remarks>
/// This API supports the .NET Framework infrastructure and is not
/// intended to be used directly from your code.
/// </remarks>
void ISelectionItemProvider.AddToSelection()
{
TreeViewItem owner = OwnerTreeViewItem;
TreeView parent = owner.ParentTreeView;
if (parent == null || (parent.SelectedItem != null && parent.SelectedContainer != Owner))
{
throw new InvalidOperationException("Controls.Properties.Resources.Automation_OperationCannotBePerformed");
}
owner.IsSelected = true;
}
/// <summary>
/// Scrolls the content area of a container object in order to display
/// the control within the visible region (viewport) of the container.
/// </summary>
/// <remarks>
/// This API supports the .NET Framework infrastructure and is not
/// intended to be used directly from your code.
/// </remarks>
void IScrollItemProvider.ScrollIntoView()
{
// Note: WPF just calls BringIntoView on the current TreeViewItem.
// This actually raises an event that can be handled by the
// its containers. Silverlight doesn't support this, so we will
// approximate by moving scrolling the TreeView's ScrollHost to the
// item.
// Get the parent TreeView
TreeViewItem owner = OwnerTreeViewItem;
TreeView parent = owner.ParentTreeView;
if (parent == null)
{
return;
}
// Scroll the item into view
parent.ItemsControlHelper.ScrollIntoView(owner);
}
private void NewTreeView()
{
this.ContainerGrid.Children.Clear();
vm.TreeItems?.Clear();
this.ContainerGrid.Children.Add(tvDataBound = (TreeView)this.TreeViewTemplate.LoadContent());
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="T:System.Windows.Automation.Peers.TreeViewAutomationPeer" />
/// class.
/// </summary>
/// <param name="owner">
/// The <see cref="T:WinRTXamlToolkit.Controls.TreeView" /> to associate
/// with the
/// <see cref="T:System.Windows.Automation.Peers.TreeViewAutomationPeer" />.
/// </param>
public TreeViewAutomationPeer(TreeView owner)
: base(owner)
{
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="T:System.Windows.Automation.Peers.TreeViewAutomationPeer" />
/// class.
/// </summary>
/// <param name="owner">
/// The <see cref="T:WinRTXamlToolkit.Controls.TreeView" /> to associate
/// with the
/// <see cref="T:System.Windows.Automation.Peers.TreeViewAutomationPeer" />.
/// </param>
public TreeViewAutomationPeer(TreeView owner)
: base(owner)
{
}
private void NewTreeView()
{
this.ContainerGrid.Children.Clear();
vm.TreeItems?.Clear();
this.ContainerGrid.Children.Add(tvDataBound = (TreeView)this.TreeViewTemplate.LoadContent());
}
