protected void PrepareDraggedElementsForDragging()
{
this.originalTransforms.Clear();
this.storedValues.Clear();
foreach (BaseFrameworkElement frameworkElement in this.DraggedElements)
{
this.originalTransforms.Add((Transform)null);
this.storedValues.Add((Dictionary <IPropertyId, object>)null);
}
bool flag = false;
for (int index = 0; index < this.DraggedElements.Count; ++index)
{
BaseFrameworkElement frameworkElement = this.DraggedElements[index];
if (frameworkElement.IsAttached)
{
SceneElement sceneElement = frameworkElement.Parent as SceneElement;
if (sceneElement != null && PlatformTypes.InlineUIContainer.IsAssignableFrom((ITypeId)sceneElement.Type))
{
sceneElement = sceneElement.Parent as SceneElement;
}
if (sceneElement != null && sceneElement.GetChildren() != null && frameworkElement.Visual != null)
{
this.storedValues[index] = InplaceMoveStrategy.StoreProperties(frameworkElement.Platform, frameworkElement.Visual, this.PropertiesToStore);
this.SetPropertyOnVisual((SceneElement)frameworkElement, PanelElement.ZIndexProperty, (object)int.MaxValue);
this.SetPropertyOnVisual((SceneElement)frameworkElement, Base2DElement.OpacityProperty, (object)0.5);
frameworkElement.IsPlaceholder = true;
flag = true;
}
}
}
this.Context.Transaction.UpdateEditTransaction();
if (!flag)
{
return;
}
this.Context.ToolBehaviorContext.Tool.RebuildAdornerSets();
}