private void OnDrop(TreeNodeDropObject data)
{
var source = data.DataObject.GetData(typeof(PlanViewModel)) as PlanViewModel;
var target = data.Target as PlanViewModel;
var parent = source.Parent;
if (parent == null)
{
PlansViewModel.Plans.Remove(source);
FiresecManager.PlansConfiguration.Plans.Remove(source.Plan);
}
else
{
parent.RemoveChild(source);
parent.Plan.Children.Remove(source.Plan);
parent.Update();
parent.IsExpanded = true;
}
if (target == null)
{
PlansViewModel.Plans.Add(source);
FiresecManager.PlansConfiguration.Plans.Add(source.Plan);
source.Plan.Parent = null;
}
else
{
target.IsExpanded = true;
target.AddChild(source);
target.Plan.Children.Add(source.Plan);
source.Plan.Parent = target.Plan;
}
FiresecManager.PlansConfiguration.Update();
ServiceFactory.SaveService.PlansChanged = true;
PlansViewModel.SelectedPlan = source;
}
private bool CanDrop(TreeNodeDropObject data)
{
var source = data.DataObject.GetData(typeof(PlanViewModel)) as PlanViewModel;
if (source == null)
return false;
var target = data.Target as PlanViewModel;
if (target == null && source.Parent != null)
return true;
if (target == source || target == source.Parent || target.GetAllParents().Contains(source))
return false;
return true;
}
protected override void StartDrag()
{
var data = TreeList.SelectedItem as TreeNodeViewModel;
if (data != null && ValidateStartPoint())
{
_dropObject = new TreeNodeDropObject();
ListViewItem draggedItemContainer = GetItemContainer(data);
var dataObject = new DataObject(data);
_dragScrollWaitCounter = 0;
_dragExpandWaitCounter = 0;
_scrollViewer = FindScrollViewer(TreeList);
ServiceFactoryBase.DragDropService.DoDragDrop(dataObject, draggedItemContainer, ShowDragVisual, true, DragEffect);
}
}
