/// <summary>
/// Invoked by the <see cref="Primitives.PinnedDocumentsPanel"/> to unpin a child.
/// </summary>
/// <param name="documentPaneItem">The <see cref="DocumentPaneItem"/> being unpinned.</param>
internal void InsertChild(DocumentPaneItem documentPaneItem)
{
if (documentPaneItem == null)
{
throw new ArgumentNullException("documentPaneItem");
}
// since we're virtualizing the scrolling region,
// we first check if we need to virtualize.
// TODO: initil implementation, needs improvements on where to insert the just-unpinned document
this.AddInternalChild(documentPaneItem);
}
internal void PinChild(DocumentPaneItem documentPaneItem)
{
var pinnedDcoumentsPanel = this.PinnedDocumentsPanel;
if (pinnedDcoumentsPanel == null)
{
return;
}
this.InternalChildren.RemoveNoVerify(documentPaneItem);
pinnedDcoumentsPanel.Children.Add(documentPaneItem);
this.InvalidateMeasure();
pinnedDcoumentsPanel.InvalidateMeasure();
}
internal void UnpinChild(DocumentPaneItem documentPaneItem)
{
if (documentPaneItem == null)
{
throw new ArgumentNullException("documentPaneItem");
}
//TODO: what should we do in case the items panel is missing from the template.
var documentsPanel = this.DocumentsPanel;
if (documentsPanel == null)
{
return;
}
this.Children.Remove(documentPaneItem);
documentsPanel.InsertChild(documentPaneItem);
}
private void CalculateWrapWidth(double availableWidth, out double wrapWidth)
{
// the PinnedDocumentsPanel should at least leave room for a single unpinned item
// either selected or not, as well as the scroll bar buttons.
var documentsPanel = this.DocumentsPanel;
DocumentPaneItem pivotalChild = null;
if (documentsPanel != null && documentsPanel.Children.Count > 0)
{
pivotalChild = documentsPanel.Children[0] as DocumentPaneItem;
}
if (pivotalChild != null)
{
pivotalChild.Measure(new Size(availableWidth, Double.PositiveInfinity));
wrapWidth = Math.Max(0.0, availableWidth - (pivotalChild.DesiredSize.Width + (this.ScrollButtonWidth * 2)));
}
else
{
wrapWidth = availableWidth;
}
}
