/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
public override Size GetPreferredSize(ViewLayoutContext context)
{
Size preferredSize = Size.Empty;
// Ensure the control has the correct parent
UpdateParent(context.Control);
// If there is a custom control associated then ask for its requested size
if (LastCustomControl != null)
{
if (ActualVisible(LastCustomControl))
{
preferredSize = LastCustomControl.GetPreferredSize(context.DisplayRectangle.Size);
// Add two pixels, one for the left and right edges that will be padded
preferredSize.Width += 2;
}
}
else
{
preferredSize.Width = NULL_CONTROL_WIDTH;
}
if (_currentSize == GroupItemSize.Large)
{
preferredSize.Height = _ribbon.CalculatedValues.GroupTripleHeight;
}
else
{
preferredSize.Height = _ribbon.CalculatedValues.GroupLineHeight;
}
return(preferredSize);
}
