添加项目文件。

Util.DiagramDesigner/ViewModels/IDiagramViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Collections.ObjectModel;
+using System.Windows;
+using System.Windows.Media;
+using System.ComponentModel;
+
+namespace Util.DiagramDesigner
+{
+    public interface IDiagramViewModel
+    {
+        string Name { get; set; }
+        List<SelectableDesignerItemViewModelBase> SelectedItems { get; }
+        ObservableCollection<SelectableDesignerItemViewModelBase> Items { get; }
+        SelectionService SelectionService { get; }
+
+        SimpleCommand CreateNewDiagramCommand { get; }
+        SimpleCommand DirectAddItemCommand { get; }
+        SimpleCommand AddItemCommand { get; }
+        SimpleCommand RemoveItemCommand { get; }
+        SimpleCommand DirectRemoveItemCommand { get; }
+        SimpleCommand ClearSelectedItemsCommand { get; }
+        SimpleCommand AlignTopCommand { get; }
+        SimpleCommand AlignVerticalCentersCommand { get; }
+        SimpleCommand AlignBottomCommand { get; }
+        SimpleCommand AlignLeftCommand { get; }
+        SimpleCommand AlignHorizontalCentersCommand { get; }
+        SimpleCommand AlignRightCommand { get; }
+        SimpleCommand BringForwardCommand { get; }
+        SimpleCommand BringToFrontCommand { get; }
+        SimpleCommand SendBackwardCommand { get; }
+        SimpleCommand SendToBackCommand { get; }
+
+        SimpleCommand DistributeHorizontalCommand { get; }
+        SimpleCommand DistributeVerticalCommand { get; }
+        SimpleCommand SelectAllCommand { get; }
+        SimpleCommand UndoCommand { get; }
+        SimpleCommand RedoCommand { get; }
+
+        Func<SelectableDesignerItemViewModelBase, bool> OutAddVerify { get; set; }
+        void ClearSelectedItems();
+        bool BelongToSameGroup(IGroupable item1, IGroupable item2);
+        Rect GetBoundingRectangle(IEnumerable<DesignerItemViewModelBase> items);
+        void UpdateZIndex();
+        Size PageSize { get;}
+        bool ShowGrid { get; set; }
+        Size GridCellSize { get; set; }
+        PageSizeOrientation PageSizeOrientation { get; set; }
+        double GridMargin { get; set; }
+        Color GridColor { get; set; }
+        Point CurrentPoint { get; set; }
+        Color CurrentColor { get; set; }
+
+        DiagramType DiagramType { get; set; }
+
+        CellHorizontalAlignment CellHorizontalAlignment { get; set; }
+        CellVerticalAlignment CellVerticalAlignment { get; set; }
+
+        event PropertyChangedEventHandler PropertyChanged;
+
+    }
+}