// InRibbonGalleryMode where the gallery is shown within Ribbon via InRibbonGallery and Arrange
// becomes responsibility of InRibbonGalleryModeArrangeOverride.
private Size InRibbonGalleryModeArrangeOverride(Size finalSize)
{
UIElementCollection children = this.Children;
Rect rcChild = new Rect(finalSize);
//
// Seed scroll offset into rcChild.
//
if (IsScrolling)
{
rcChild.X = -1.0 * _scrollData._offset.X;
rcChild.Y = -1.0 * _scrollData._offset.Y;
}
// Arrange and Position Children. over each other as the items being arranged in child
// in a way to respect the offset of where previous category children are ending.
// It's merged wrapping.
for (int i = 0, count = children.Count; i < count; ++i)
{
RibbonGalleryCategory child = children[i] as RibbonGalleryCategory;
if (child == null ||
child.Visibility == Visibility.Collapsed)
{
continue;
}
rcChild.Width = Math.Max(finalSize.Width, child.DesiredSize.Width);
child.Arrange(rcChild);
}
// Refresh the IsEnabled state of the InRibbonGallery's LineUp & LineDown buttons.
RibbonGallery gallery = Gallery;
if (gallery != null)
{
InRibbonGallery irg = gallery.ParentInRibbonGallery;
if (irg != null &&
irg.IsInInRibbonMode)
{
irg.CoerceValue(InRibbonGallery.CanLineUpProperty);
irg.CoerceValue(InRibbonGallery.CanLineDownProperty);
}
}
return(DesiredSize);
}
// Updates Width and other layout properties in the Visual tree from RibbonControl to InRibbonGallery wherever needed
// when attains In Ribbon mode.
private static void OnControlSizeDefinitionChanged(DependencyObject d, DependencyPropertyChangedEventArgs args)
{
InRibbonGallery me = (InRibbonGallery)d;
me.CoerceValue(IsCollapsedProperty);
if (me.IsInInRibbonMode)
{
if (me._ribbonControl == null)
{
me._ribbonControl = TreeHelper.FindAncestor(me, delegate(DependencyObject element)
{
RibbonControl rc = (element as RibbonControl);
if (rc != null)
{
return(me == rc.ContentChild);
}
return(false);
}) as RibbonControl;
}
}
me.UpdateInRibbonGalleryModeProperties();
}