在Eclipse RCP中拖放视图之间传输项目？ [英] Transfer Items between Views with Drag-and-Drop in Eclipse RCP?

问题描述

我的应用程序中有2个视图。在其中一个视图中，我可以看到包含自定义元素（如MDocument，MVersion ...）的TreeStructure。

我希望能够拖动从我的视图类型MVersion到另一个，但我不知道如何声明传输类型或检查选择的项目是否是支持的类型。

任何想法？

解决方案

最简单的方法是使用 LocalSelectionTransfer 。一旦你向观众添加了拖放支持...

你设置了被拖入的 ISelection DragSourceListener.dragStart（）方法：

  LocalSelectionTransfer.getTransfer（）。为setSelection（选择）; 
  

在 DropTargetListener.drop（）检查类型是否支持，并检索选择：

  if（LocalSelectionTransfer.getTransfer（）。isSupportedType（event.currentDataType）） 
 ISelection sel = LocalSelectionTransfer.getTransfer（）。getSelection（）; 
 ... 
  

I have 2 views in my application. In one of the views I can see a TreeStructure containing custom defined elements (such as MDocument, MVersion...).

I would like to be able to drag items of type MVersion from my view to the other one but I don't know how to declare the transfer types or to check if the item selected is a supported type.

Any ideas?

解决方案

The easiest way is to use LocalSelectionTransfer. Once you have added drag/drop support to your viewers...

You set the ISelection that is dragged in DragSourceListener.dragStart() method:

LocalSelectionTransfer.getTransfer().setSelection(selection);

In the DropTargetListener.drop() you check if the type is supported and retrieve the selection:

if (LocalSelectionTransfer.getTransfer().isSupportedType(event.currentDataType))
    ISelection sel = LocalSelectionTransfer.getTransfer().getSelection();
    ...

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