protected override Size MeasureOverride(Size availableSize)
{
if (Children.Count == 0)
{
return(new Size(100, 20));
}
Size szFinal = new Size(0, 0);
string strRoot = Root;
TreeNode tnRoot = this.FindName(strRoot) as TreeNode;
foreach (UIElement uiel in InternalChildren)
{
uiel.Measure(availableSize);
Size szThis = uiel.DesiredSize;
if (szThis.Width > szFinal.Width || szThis.Height > szFinal.Height)
{
szFinal = new Size(
Math.Max(szThis.Width, szFinal.Width),
Math.Max(szThis.Height, szFinal.Height));
}
}
if (tnRoot != null)
{
SetParents(tnRoot);
_ltd = new LayeredTreeDraw(tnRoot, HorizontalBuffer, HorizontalBufferSubtree, VerticalBuffer, VerticalJustification.top);
_ltd.LayoutTree();
szFinal = new Size(_ltd.PxOverallWidth, _ltd.PxOverallHeight);
}
return(szFinal);
}
public static void CollapsePropertyChange(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
TreeNode tn = o as TreeNode;
if (tn != null && tn.Collapsible)
{
bool fCollapsed = ((bool)e.NewValue);
foreach (TreeNode tnCur in LayeredTreeDraw.VisibleDescendants <TreeNode>(tn))
{
tnCur.Visibility = fCollapsed ? Visibility.Hidden : Visibility.Visible;
}
}
}