private void ComputeLogicalReplacements()
{
if (DockableCollection.IsCollapsed)
{
// The space previously occupied by the compressed collection will fill filled by other collection(s). This
// will occur on either the vertical or horizontal axes. If this edge is on the edge of expansion, then the
// visible edge will be the expanding collections. Otherwise, it will be empty.
//
// The edge(s) through which expansion is likely to occur owns the replacement. Other edges will have a null replacement.
LayoutContext.ComputeLogicalReplacements(out LinkedList <LayoutContext> contactingEdgeReplacements, out LinkedList <LayoutContext> opposingEdgeReplacements, LayoutContext.OpposingNeighbors[EdgesDockPosition]);
if (contactingEdgeReplacements == null)
{
_logicalReplacements = opposingEdgeReplacements;
}
else if (opposingEdgeReplacements == null)
{
_logicalReplacements = contactingEdgeReplacements;
}
else
{
_logicalReplacements = new LinkedList <LayoutContext>();
switch (EdgesDockPosition)
{
case System.Windows.Controls.Dock.Left:
case System.Windows.Controls.Dock.Top:
foreach (var entry in contactingEdgeReplacements)
{
_logicalReplacements.AddLast(entry);
}
foreach (var entry in opposingEdgeReplacements)
{
_logicalReplacements.AddLast(entry);
}
break;
default:
foreach (var entry in opposingEdgeReplacements)
{
_logicalReplacements.AddLast(entry);
}
foreach (var entry in contactingEdgeReplacements)
{
_logicalReplacements.AddLast(entry);
}
break;
}
}
}
else
{
_logicalReplacements = null;
}
}
