public override List <ElementSite> CaptureOrderedSequence(UIElement source)
{
var grid = GetParentGrid(source);
List <ElementSite> elementSites = grid.ColumnDefinitions.Any(c => ReferenceEquals(source, OrderableBehavior.GetDragHeader(c))) ? GetColumnSequence(grid) : GetRowSequence(grid);
((DefinitionSite)OrderableBehavior.GetSite(source)).IsAnimationEnabled = false;
return(elementSites);
}
public override void ReleaseOrderedSequence(UIElement source, List <ElementSite> elements)
{
var grid = GetParentGrid(source);
Action <UIElement, int> setDef;
Action <DefinitionSite> addDef;
if (grid.ColumnDefinitions.Any(c => ReferenceEquals(source, OrderableBehavior.GetDragHeader(c))))
{
grid.ColumnDefinitions.Clear();
setDef = Grid.SetColumn;
addDef = d => grid.ColumnDefinitions.Add((ColumnDefinition)d.Definition);
}
else
{
grid.RowDefinitions.Clear();
setDef = Grid.SetRow;
addDef = d => grid.RowDefinitions.Add((RowDefinition)d.Definition);
}
for (var i = 0; i < elements.Count; i++)
{
var site = (DefinitionSite)elements[i];
if (site.Children != null)
{
foreach (var child in site.Children)
{
setDef(child, i);
}
}
addDef(site);
}
var elementSite = (DefinitionSite)OrderableBehavior.GetSite(source);
elementSite.IsAnimationEnabled = true;
elementSite.Offset = OrderableBehavior.CalcElementOffset(elements, elementSite);
grid.UpdateLayout();
foreach (var site in elements.DirectCast <DefinitionSite>())
{
site.UpdateRenderOffset();
site.QueryDispose();
}
}
private ElementSite GetCurrentSite(DefinitionBase definition)
{
var site = OrderableBehavior.GetSite(definition) as DefinitionSite;
if (site == null)
{
return(null);
}
site.CancelDisposing();
if (ReferenceEquals(site.DragHeader, DraggableBehavior.DraggedElement))
{
site.Offset = site.RenderOffset;
site.IsAnimationEnabled = false;
}
return(site);
}
