/// <summary>
/// Perform a layout of the elements.
/// </summary>
/// <param name="context">Layout context.</param>
public override void Layout(ViewLayoutContext context)
{
Debug.Assert(context != null);
// We take on all the available display area
ClientRectangle = context.DisplayRectangle;
// Are we allowed to change the layout of controls?
if (!context.ViewManager.DoNotLayoutControls)
{
// If we have an actual control, position it with a pixel padding all around
LastGallery?.SetBounds(ClientLocation.X + 1,
ClientLocation.Y + 1,
ClientWidth - 2,
ClientHeight - 2);
}
// Let child elements layout in given space
base.Layout(context);
}
/// <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 (_currentSize == GroupItemSize.Small)
{
preferredSize = base.GetPreferredSize(context);
}
else
{
// If there is a gallery associated then ask for its requested size
if (LastGallery != null)
{
if (ActualVisible(LastGallery))
{
preferredSize = LastGallery.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);
}
