static TreeViewItem GetTreeViewItem(
ItemsControl parent, object item, bool isExpanded)
{
if (item is TreeViewItem tvi)
{
return(tvi);
}
var result = ContainerFromItem(parent, item);
if (result == null && isExpanded)
{
parent.UpdateLayout();
result = ContainerFromItem(parent, item);
}
return(result);
}
protected void CreateIcon(Floor floor)
{
ItemsControl control = new ItemsControl();
Canvas canvas = new Canvas();
control.ItemTemplate = Application.Current.FindResource("SegmentRowTemplate") as DataTemplate;
canvas.Children.Add(control);
control.ItemsSource = floor.Segments;
control.UpdateLayout();
canvas.Measure(new Size(1000, 1000));
canvas.Arrange(new Rect(new Size(1000, 1000)));
RenderTargetBitmap bmp = new RenderTargetBitmap((int)control.DesiredSize.Width, (int)control.DesiredSize.Height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(control);
floor.Icon = bmp;
}
private TreeViewItem BringItemIntoView(ItemsControl container, object item)
{
TreeViewItem element = container.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem;
if (element != null)
element.BringIntoView();
else if (container.Items.Contains(item))
{
var vsp = (VirtualizingStackPanel)typeof(ItemsControl).InvokeMember("_itemsHost", BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic, null, container, null);
if (vsp == null)
{
container.UpdateLayout();
vsp = (VirtualizingStackPanel)typeof(ItemsControl).InvokeMember("_itemsHost", BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic, null, container, null);
}
if (vsp != null)
{
var index = container.Items.IndexOf(item);
if (index >= 0)
{
vsp.GetType().GetMethod("BringIndexIntoView", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(vsp, new object[] { index });
element = container.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem;
}
}
else
Debug.WriteLine("VirtualizingStackPanel NOT FOUND!!!");
}
return element;
}
