protected override sw.Size MeasureOverride(sw.Size constraint)
{
// once loaded, act as normal
if (IsLoaded)
{
return(base.MeasureOverride(constraint));
}
// not loaded yet, let's calculate size based on all tabs
var size = new sw.Size(0, 0);
var selectedSize = new sw.Size(0, 0);
var selected = SelectedItem as swc.TabItem;
foreach (var tab in Items.Cast <swc.TabItem>())
{
var tabContent = tab.Content as sw.FrameworkElement;
if (tabContent == null)
{
continue;
}
tabContent.Measure(constraint);
var tabSize = tabContent.DesiredSize;
if (tab == selected)
{
selectedSize = tabSize;
}
size = size.Max(tabSize);
}
var baseSize = base.MeasureOverride(constraint);
// calculate size of the border around the content based on selected tab's content size
var borderSize = baseSize.Subtract(selectedSize);
// return max height with border
return(size.Add(borderSize));
}
public static Size Bounds(this Size size, Size minimum, Size maximum)
{
if (minimum.Width > maximum.Width || minimum.Height > maximum.Height)
{
throw new Granular.Exception("Invalid bounds (minimum: {0}, maximum: {1})", minimum, maximum);
}
return(size.Max(minimum).Min(maximum));
}