public static SceneElement GetSelectionRoot(SceneViewModel viewModel)
{
return((SceneElement)viewModel.FindPanelClosestToActiveEditingContainer() ?? viewModel.ActiveEditingContainer as SceneElement);
}
private void InitializeDrag(Point dragStartPosition)
{
SceneViewModel viewModel = this.ActiveView.ViewModel;
this.CreateSubTransaction();
this.dragStartPosition = dragStartPosition;
this.ComputeDraggedElements();
if (this.draggedElements == null || this.draggedElements.Count == 0)
{
this.moveStrategy = (MoveStrategy)null;
this.dragContainer = (BaseFrameworkElement)null;
this.CancelDrag();
}
else
{
this.moveStrategy = (MoveStrategy)null;
this.moveStrategyContext = MoveStrategyContext.FromSelection((ToolBehavior)this, this.primarySelection, this.selectedElements, this.draggedElements, this.DuplicationOffset, this.dragStartPosition);
this.dragContainer = (BaseFrameworkElement)null;
bool flag = false;
SceneElement sceneElement1 = (SceneElement)null;
foreach (SceneElement sceneElement2 in (IEnumerable <SceneElement>) this.selectedElements)
{
BaseFrameworkElement frameworkElement = (BaseFrameworkElement)null;
BaseFrameworkElement editingContainer = viewModel.FindPanelClosestToActiveEditingContainer();
if (editingContainer != null && editingContainer.IsAncestorOf((SceneNode)sceneElement2))
{
frameworkElement = editingContainer;
}
if (!flag)
{
flag = true;
this.dragContainer = frameworkElement;
sceneElement1 = sceneElement2.ParentElement;
}
else if (sceneElement2.ParentElement != sceneElement1)
{
this.dragContainer = (BaseFrameworkElement)null;
break;
}
if (frameworkElement != this.dragContainer)
{
this.dragContainer = (BaseFrameworkElement)null;
break;
}
}
if (this.dragContainer != null)
{
this.moveStrategy = MoveStrategyFactory.Create(this.moveStrategyContext, this.draggedElements[0].ParentElement, this.IsShiftDown);
if (this.moveStrategy != null)
{
this.moveStrategy.BeginDrag(dragStartPosition);
this.ToolBehaviorContext.SnappingEngine.Start(this.ToolBehaviorContext, this.primaryDraggedElement, this.draggedElements);
}
else
{
this.CancelDrag();
}
}
else
{
this.CancelDrag();
}
}
}