带棱镜区域适配器的AvalonDock

Question

我看过一些关于SO的问题，但它们都不适用于我。我希望能够在Prism 4中使用伟大的Avalondock 2.0。但是，所有适用于Avalondock 1.x系列的示例区域适配器都无法正常工作。

有没有人有关于如何为AvalonDock的LayoutDocumentPane和LayoutAnchorablePane创建区域适配器的示例代码？

Answer 1

不幸的是，就我所知，“LayoutDocumentPane”和“LayoutAnchorablePane”都不允许包含/创建RegionAdapters，但是“DockingManager”却可以。一种解决方案是为DockingManager创建一个RegionAdapter，然后管理可视化树中“LayoutDocuments”的实例化。

的XAML将如下所示：

<ad:DockingManager Background="AliceBlue" x:Name="WorkspaceRegion" prism:RegionManager.RegionName="WorkspaceRegion"> 
         <ad:LayoutRoot> 
          <ad:LayoutPanel> 
           <ad:LayoutDocumentPaneGroup> 
            <ad:LayoutDocumentPane> 

            </ad:LayoutDocumentPane> 
           </ad:LayoutDocumentPaneGroup> 
          </ad:LayoutPanel> 
         </ad:LayoutRoot> 
        </ad:DockingManager> 

注意该区域在DockingManager标签定义和存在LayoutPanel下单LayoutDocumentPaneGroup。 LayoutDocumentPaneGroup下的LayoutDocumentPane将托管与要添加到“WorkspaceRegion”的视图关联的LayoutDocuments。

对于RegionAdapter本身参阅下面我提供了有解释性评论

代码

#region Constructor 

     public AvalonDockRegionAdapter(IRegionBehaviorFactory factory) 
      : base(factory) 
     { 
     } 

     #endregion //Constructor 


     #region Overrides 

     protected override IRegion CreateRegion() 
     { 
      return new AllActiveRegion(); 
     } 

     protected override void Adapt(IRegion region, DockingManager regionTarget) 
     { 
      region.Views.CollectionChanged += delegate(
       Object sender, NotifyCollectionChangedEventArgs e) 
       { 
        this.OnViewsCollectionChanged(sender, e, region, regionTarget); 
       }; 

      regionTarget.DocumentClosed += delegate(
          Object sender, DocumentClosedEventArgs e) 
      { 
       this.OnDocumentClosedEventArgs(sender, e, region); 
      }; 
     } 

     #endregion //Overrides 


     #region Event Handlers 

     /// <summary> 
     /// Handles the NotifyCollectionChangedEventArgs event. 
     /// </summary> 
     /// <param name="sender">The sender.</param> 
     /// <param name="e">The event.</param> 
     /// <param name="region">The region.</param> 
     /// <param name="regionTarget">The region target.</param> 
     void OnViewsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e, IRegion region, DockingManager regionTarget) 
     { 
      if (e.Action == NotifyCollectionChangedAction.Add) 
      { 
       foreach (FrameworkElement item in e.NewItems) 
       { 
        UIElement view = item as UIElement; 

        if (view != null) 
        { 
         //Create a new layout document to be included in the LayoutDocuemntPane (defined in xaml) 
         LayoutDocument newLayoutDocument = new LayoutDocument(); 
         //Set the content of the LayoutDocument 
         newLayoutDocument.Content = item; 

         ViewModelBase_2 viewModel = (ViewModelBase_2)item.DataContext; 

         if (viewModel != null) 
         { 
          //All my viewmodels have properties DisplayName and IconKey 
          newLayoutDocument.Title = viewModel.DisplayName; 
          //GetImageUri is custom made method which gets the icon for the LayoutDocument 
          newLayoutDocument.IconSource = this.GetImageUri(viewModel.IconKey); 
         } 

         //Store all LayoutDocuments already pertaining to the LayoutDocumentPane (defined in xaml) 
         List<LayoutDocument> oldLayoutDocuments = new List<LayoutDocument>(); 
         //Get the current ILayoutDocumentPane ... Depending on the arrangement of the views this can be either 
         //a simple LayoutDocumentPane or a LayoutDocumentPaneGroup 
         ILayoutDocumentPane currentILayoutDocumentPane = (ILayoutDocumentPane)regionTarget.Layout.RootPanel.Children[0]; 

         if (currentILayoutDocumentPane.GetType() == typeof(LayoutDocumentPaneGroup)) 
         { 
          //If the current ILayoutDocumentPane turns out to be a group 
          //Get the children (LayoutDocuments) of the first pane 
          LayoutDocumentPane oldLayoutDocumentPane = (LayoutDocumentPane)currentILayoutDocumentPane.Children.ToList()[0]; 
          foreach (LayoutDocument child in oldLayoutDocumentPane.Children) 
          { 
           oldLayoutDocuments.Insert(0, child); 
          } 
         } 
         else if (currentILayoutDocumentPane.GetType() == typeof(LayoutDocumentPane)) 
         { 
          //If the current ILayoutDocumentPane turns out to be a simple pane 
          //Get the children (LayoutDocuments) of the single existing pane. 
          foreach (LayoutDocument child in currentILayoutDocumentPane.Children) 
          { 
           oldLayoutDocuments.Insert(0, child); 
          } 
         } 

         //Create a new LayoutDocumentPane and inserts your new LayoutDocument 
         LayoutDocumentPane newLayoutDocumentPane = new LayoutDocumentPane(); 
         newLayoutDocumentPane.InsertChildAt(0, newLayoutDocument); 

         //Append to the new LayoutDocumentPane the old LayoutDocuments 
         foreach (LayoutDocument doc in oldLayoutDocuments) 
         { 
          newLayoutDocumentPane.InsertChildAt(0, doc); 
         } 

         //Traverse the visual tree of the xaml and replace the LayoutDocumentPane (or LayoutDocumentPaneGroup) in xaml 
         //with your new LayoutDocumentPane (or LayoutDocumentPaneGroup) 
         if (currentILayoutDocumentPane.GetType() == typeof(LayoutDocumentPane)) 
          regionTarget.Layout.RootPanel.ReplaceChildAt(0, newLayoutDocumentPane); 
         else if (currentILayoutDocumentPane.GetType() == typeof(LayoutDocumentPaneGroup)) 
         { 
          currentILayoutDocumentPane.ReplaceChild(currentILayoutDocumentPane.Children.ToList()[0], newLayoutDocumentPane); 
          regionTarget.Layout.RootPanel.ReplaceChildAt(0, currentILayoutDocumentPane); 
         } 
         newLayoutDocument.IsActive = true; 
        } 
       } 
      } 
     } 

     /// <summary> 
     /// Handles the DocumentClosedEventArgs event raised by the DockingNanager when 
     /// one of the LayoutContent it hosts is closed. 
     /// </summary> 
     /// <param name="sender">The sender</param> 
     /// <param name="e">The event.</param> 
     /// <param name="region">The region.</param> 
     void OnDocumentClosedEventArgs(object sender, DocumentClosedEventArgs e, IRegion region) 
     { 
      region.Remove(e.Document.Content); 
     } 

     #endregion //Event handlers 

不要忘了在你的引导程序中添加以下代码，以便棱镜知道你RegionAdapter

的存在

protected override RegionAdapterMappings ConfigureRegionAdapterMappings() 
     { 
      // Call base method 
      var mappings = base.ConfigureRegionAdapterMappings(); 
      if (mappings == null) return null; 

      // Add custom mappings 
      mappings.RegisterMapping(typeof(DockingManager), 
       ServiceLocator.Current.GetInstance<AvalonDockRegionAdapter>()); 

      // Set return value 
      return mappings; 
     } 

Voilà。我知道这不是最干净的解决方案，但它应该起作用。同样的方法可以很容易地应用于“LayoutAnchorablePane”。

长寿而繁荣！