防止對接AvalonDock

Question

是否可以通過使用某些過濾來阻止將一個可錨定元素對接到另一個元素？例如，在viewmodel我可以包含一些屬性doctype。對於一個可錨定元素，doctype的值將爲「a」，另一個爲「b」。我如何使用屬性doctype來防止停靠，如果錨定元素的值「a」無法與doctype「b」對接錨定元素？也許，還有其他解決方案。

Answer 1

我在LayoutAnchorableFloatingWindowControl.cs

改變 IOverlayWindowHost.GetDropAreas方法

第一步是intializing的內容的類型。

var floatingWindowContentHost = Content as FloatingWindowContentHost; 
if (floatingWindowContentHost == null) return _dropAreas; 
var rootVisual = floatingWindowContentHost.RootVisual; 
Type type = null; 

var layoutAnchorableFloatingWindow = draggingWindow.Model as LayoutAnchorableFloatingWindow; 
if (layoutAnchorableFloatingWindow != null) 
{ 
    //big part of code for getting type 
    var layoutAnchorablePane = layoutAnchorableFloatingWindow.SinglePane as LayoutAnchorablePane; 

    if (layoutAnchorablePane != null 
     && (layoutAnchorableFloatingWindow.IsSinglePane 
     && layoutAnchorablePane.SelectedContent != null)) 
    { 
     var layoutAnchorable = ((LayoutAnchorablePane)layoutAnchorableFloatingWindow.SinglePane).SelectedContent as LayoutAnchorable; 
     if (layoutAnchorable != null) 
      type = layoutAnchorable.Content; 
    } 
    else 
    { 
     var pane = GetLayoutAnchorablePane(layoutAnchorableFloatingWindow.RootPanel); 
     if (pane == null || pane.SelectedContent == null) 
      return null; 

     var layoutAnchorable = pane.SelectedContent as LayoutAnchorable; 
     if (layoutAnchorable != null) 
      type = layoutAnchorable.Content; 
    } 
} 

此後，我只是比較兩種類型，並把需要到_dropAreas。

foreach (var areaHost in rootVisual.FindVisualChildren<LayoutAnchorablePaneControl>()) 
{ 
    Type areahostType = null; 
    var layoutAnchorablePane = areaHost.Model as LayoutAnchorablePane; 
    if (layoutAnchorablePane != null && layoutAnchorablePane.SelectedContent != null) 
    { 
     var layoutAnchorable = ((LayoutAnchorablePane)areaHost.Model).SelectedContent as LayoutAnchorable; 
     if (layoutAnchorable != null) 
      areahostType = layoutAnchorable.Content; 
    } 
    // prevent docking different documents 
    if (type != null && areahostType != null && areahostType == type) 
    { 
     _dropAreas.Add(new DropArea<LayoutAnchorablePaneControl>(areaHost, DropAreaType.AnchorablePane)); 
    } 
} 

爲了防止對接成文檔區域，需要在DockingManager.cs

對於視覺防止DropTargets來做出同樣的方法改變需要改變OverlayWindow.cs

Answer 2

這是正確的更改IOverlayWindowHost.GetDropAreas，但這一改變對我來說似乎更容易。

我簡單的 「LayoutAnchorableFloatingWindowControl.cs」 刪除此的foreach：

... 
// Remove this foreach 
foreach (var areaHost in rootVisual.FindVisualChildren<LayoutDocumentPaneControl>()) 
{ 
    _dropAreas.Add(new DropArea<LayoutDocumentPaneControl>(
     areaHost, 
     DropAreaType.DocumentPane)); 
} 

return _dropAreas; 

，並在 「DockingManager.cs」 其他實施必須添加一個其他的原因：

if (!isDraggingDocuments) 
{ 
    _areas.Add(new DropArea<DockingManager>(
     this, 
     DropAreaType.DockingManager)); 

    foreach (var areaHost in this.FindVisualChildren<LayoutAnchorablePaneControl>()) 
    { 
     if (areaHost.Model.Descendents().Any()) 
     { 
      _areas.Add(new DropArea<LayoutAnchorablePaneControl>(
       areaHost, 
       DropAreaType.AnchorablePane)); 
     } 
    } 
} 
// -----> This else is new 
else 
{ 
    foreach (var areaHost in this.FindVisualChildren<LayoutDocumentPaneControl>()) 
    { 
     _areas.Add(new DropArea<LayoutDocumentPaneControl>(
      areaHost, 
      DropAreaType.DocumentPane)); 
    } 

    foreach (var areaHost in this.FindVisualChildren<LayoutDocumentPaneGroupControl>()) 
    { 
     var documentGroupModel = areaHost.Model as LayoutDocumentPaneGroup; 
     if (documentGroupModel.Children.Where(c => c.IsVisible).Count() == 0) 
     { 
      _areas.Add(new DropArea<LayoutDocumentPaneGroupControl>(
       areaHost, 
       DropAreaType.DocumentPaneGroup)); 
     } 
    } 
} 

return _areas; 

所以，如果您不拖動LayoutDocument，則不要將文檔窗格控件添加到拖放區域。

這就是它 - 適用於我。