//protected override bool IsItemItsOwnContainerOverride(object item)
//{
// return item is BreadcrumbItem;
//}
//protected override DependencyObject GetContainerForItemOverride()
//{
// BreadcrumbItem item = new BreadcrumbItem();
// return item;
//}
/// <summary>
/// Perform a special measurement that checks whether to collapse the header.
/// </summary>
/// <param name="constraint"></param>
/// <returns></returns>
protected override Size MeasureOverride(Size constraint)
{
if (SelectedItem != null)
{
headerControl.IsVisible = true;
headerControl.Measure(constraint);
Size size = new Size(constraint.Width - headerControl.DesiredSize.Width, constraint.Height);
selectedControl.Measure(new Size(double.PositiveInfinity, constraint.Height));
double width = headerControl.DesiredSize.Width + selectedControl.DesiredSize.Width;
if (width > constraint.Width || (IsRoot && SelectedItem != null))
{
headerControl.IsVisible = false;
}
}
else if (headerControl != null)
{
headerControl.IsVisible = true;
}
IsOverflow = headerControl != null ? headerControl.IsVisible != true : false;
Size result = base.MeasureOverride(constraint);
return(result);
}
public static Size GetMinControlSize(Layoutable control)
{
control.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
control.Arrange(new Rect(control.DesiredSize));
return(control.Bounds.Size);
}