public RubberbandAdorner(DiagramControl diagramControl, DesignerCanvas designerCanvas, Point? dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
this.startPoint = dragStartPoint;
rubberbandPen = new Pen(Brushes.LightSlateGray, 1);
rubberbandPen.DashStyle = new DashStyle(new double[] { 2 }, 1);
DiagramControl = diagramControl;
}
static void AddAction(DiagramControl dc, IList newItems)
{
if (newItems == null || newItems.Count == 0) return;
if (newItems.Count > 1)
{
if (dc.ItemsSource == null) return;
if (dc.Check())
{
dc.Bind(newItems);
}
}
else //增加单一节点
{
foreach (var newItem in newItems)
{
var model = newItem as DataModel;
if (model == null) continue;
var item = new DesignerItem(newItem, dc);
item.ItemStyle = JsonConvert.DeserializeObject<ItemStyle>(dc.GetItemStyle(newItem));
item.ItemStyle.designerItem = item;
var parentid = dc.GetPId(newItem);
if (parentid.IsNotEmpty())
{
var parent = dc.Manager.GetDesignerItemById(parentid);
parent.ChildrenDesignerItems.Add(item);
item.ParentDesignerItem = parent;
dc.Manager.DrawChild(parent, item, new List<DesignerItem>());
if (dc.IsAddAfter)/*增加子节点*/
{
var childs = dc.Manager.GetAllSubItems(parent).Where(x => !x.Equals(item));
var lastChild = !childs.Any() ? parent : childs.Aggregate((a, b) => Canvas.GetTop(a) > Canvas.GetTop(b) ? a : b);
var below = dc.DesignerItems.Where(x => Canvas.GetTop(x) > Canvas.GetTop(lastChild)).ToList();
dc.AddToMessage("增加子节点", dc.Manager.GetTime(() =>
{
below.ForEach(x => { Canvas.SetTop(x, Canvas.GetTop(x) + item.ActualHeight); });
Canvas.SetTop(item, Canvas.GetTop(lastChild) + lastChild.ActualHeight);
}));
dc.Manager.SetSelectItem(item);
}
else/*增加相邻节点*/
{
var s = dc.DesignerCanvas.SelectionService.CurrentSelection.ConvertAll<DesignerItem>(x => x as DesignerItem);
if (!s.Any()) return;
var selectedItem = s.FirstOrDefault();
if (selectedItem == null) return;
DesignerItem libling;
var down = dc.DesignerItems.Where(x => x.Level == selectedItem.Level && Canvas.GetTop(x) > Canvas.GetTop(selectedItem) && x.ParentDesignerItem.Equals(selectedItem.ParentDesignerItem)).ToList();
if (down.Any())
{
libling = down.Aggregate((a, b) => Canvas.GetTop(a) < Canvas.GetTop(b) ? a : b);
var below = dc.DesignerItems.Where(x => Canvas.GetTop(x) > Canvas.GetTop(libling)).ToList();
below.Add(libling);
dc.AddToMessage("增加相邻节点", dc.Manager.GetTime(() =>
{
below.ForEach(x => { Canvas.SetTop(x, Canvas.GetTop(x) + item.ActualHeight); });
Canvas.SetTop(item, Canvas.GetTop(libling) - libling.ActualHeight);
}));
}
else
{
var childs = dc.Manager.GetAllSubItems(parent);
var lastChild = !childs.Any() ? parent : childs.Aggregate((a, b) => Canvas.GetTop(a) > Canvas.GetTop(b) ? a : b);
var below = dc.DesignerItems.Where(x => Canvas.GetTop(x) > Canvas.GetTop(lastChild)).ToList();
dc.AddToMessage("增加相邻节点", dc.Manager.GetTime(() =>
{
below.ForEach(x => { Canvas.SetTop(x, Canvas.GetTop(x) + item.ActualHeight); });
Canvas.SetTop(item, Canvas.GetTop(lastChild) + lastChild.ActualHeight);
}));
}
}
}
else
{
dc.Manager.DrawRoot(item);
item.ApplyTemplate();
item.SetTemplate();
item.UpdateLayout();
if (dc.ItemsSource.Count > 1)
{
Canvas.SetTop(item, dc.GetTop(newItem) - item.ActualHeight / 2);
Canvas.SetLeft(item, dc.GetLeft(newItem) - item.ActualWidth / 2);
}
else
{
Canvas.SetTop(item, 0);
Canvas.SetLeft(item, 0);
}
}
dc.DesignerItems.Add(item);
dc.Manager.SetSelectItem(item);
dc.Manager.Scroll(item);
dc.Manager.SavePosition();
}
}
}
private static void DeleteAction(DiagramControl dc, IList oldItems)
{
if (oldItems == null || oldItems.Count == 0) return;
dc.EnsureDeletedItems();
#region 先取得所有选中节点的子节点，再判断被删除的节点是否在内，是则不删除
var items = dc.Manager.GetSelectedItemsAndAllSubItems();
List<DesignerItem> allSubItems = items.Where(designerItem => !items.Contains(designerItem)).ToList();
#endregion
foreach (var oldItem in oldItems)
{
var id = dc.GetId(oldItem);
if (allSubItems.Any(x => x.ItemId == id))
{
continue;
}
var deleteItem = dc.Manager.GetDesignerItemById(dc.GetId(oldItem));
if (deleteItem == null) continue;
dc.Manager.DeleteArrange(deleteItem);
var model = oldItem as DataModel;
if (model == null) continue;
//删除所有子节点
var children = dc.GetChildren(oldItem);
children.ForEach(x =>
{
var a = x as DataModel;
if (a != null)
{
a.MarkDeleted();
dc.DeletedItems.Add(a);
dc.Manager.DeleteItem(dc.GetId(a));
}
});
//删除本身
model.MarkDeleted();
dc.DeletedItems.Add(oldItem);
dc.Manager.DeleteItem(dc.GetId(oldItem));
//更新折叠按钮显示状态，选中节点，滚动到节点
var pid = dc.GetPId(oldItem);
if (pid.IsNotEmpty())
{
var parentDesignerItem = dc.Manager.GetDesignerItemById(pid);
var subitems = parentDesignerItem.ChildrenDesignerItems;
// dc.DiagramManager.GetDirectSubItemsAndUpdateExpander(parentDesignerItem);//更新展开按钮显示状态
if (subitems != null)
{
#region 选中上方相邻节点
var topItems = subitems.Where(x => Canvas.GetTop(x) < Canvas.GetTop(deleteItem));
var item = topItems.Any() ? topItems.Aggregate((a, b) => Canvas.GetTop(a) > Canvas.GetTop(b) ? a : b) : parentDesignerItem;
dc.Manager.SetSelectItem(item);
dc.Manager.Scroll(item);
#endregion
}
}
}
//dc.DiagramManager.Arrange();
dc.Manager.SavePosition();
}
static void ItemsSourceCollectionChanged(DiagramControl dc, INotifyCollectionChanged items)
{
items.CollectionChanged += (sender, arg) =>
{
switch (arg.Action)
{
case NotifyCollectionChangedAction.Add:
AddAction(dc, arg.NewItems);
break;
case NotifyCollectionChangedAction.Remove:
DeleteAction(dc, arg.OldItems);
break;
case NotifyCollectionChangedAction.Reset:
dc.DesignerCanvas.Children.Clear();
dc.DesignerItems.Clear();
dc.DeletedDesignerItems.Clear();
break;
}
};
}
public SelectionService(DesignerCanvas canvas, DiagramControl diagramControl)
{
this.designerCanvas = canvas;
this._diagramControl = diagramControl;
}
public DiagramManager(DiagramControl diagramControl)
{
_diagramControl = diagramControl;
}