如何在Eclipse 4 RCP中获取IHandlerService对象？ [英] How to get an IHandlerService object in Eclipse 4 RCP?

问题描述

我正在做一个测试项目，并遵循了 Vogella的RCP教程 。之后，我对其进行了一些更改，例如。创建了 JFace TreeView 。现在，我希望如果用户双击 TreeView 元素，它将打开另一个 Part 。我有命令，但是，我不知道如何调用它。如果您看一下该教程，您可能会注意到它仅使用部件而不使用视图，并且我没有启动工作台的 Application.java 类。因此，以下方法对我不起作用：

I am working on a test project and followed Vogella's RCP tutorial. After that I made some changes on it, eg. created a JFace TreeView. Now I want that if the user double clicks on a TreeView element it opens up another Part. I have the command for it but, I do not know how to call it. If you look at the tutorial you may notice it only uses Parts, not Views and, I do not have an Application.java class that starts the workbench. Therefore the following methods do not work for me:

1. IHandlerService handlerService =（IHandlerService）viewer.getSite（）。 getService（IHandlerService.class）;


2. IWorkbenchWindow window = PlatformUI.getWorkbench（）。getActiveWorkbenchWindow（）;
IHandlerService handlerService =（IHandlerService）window.getService（IHandlerService.class）;
handlerService.executeCommand（cmdID，null ）;

1. IHandlerService handlerService = (IHandlerService) viewer.getSite().getService(IHandlerService.class);
2. IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); IHandlerService handlerService = (IHandlerService)window.getService(IHandlerService.class); handlerService.executeCommand(cmdID, null);

两者都给了我 NullPointerException 。

推荐答案

这个旧备用数据库怎么样：

How about this old standby:

Command command = ((ICommandService)getSite().getService(ICommandService.class)).getCommand(commandId);
...
final Event trigger = new Event();
ExecutionEvent executionEvent = ((IHandlerService)getSite().getService(IHandlerService.class)).createExecutionEvent(command, trigger);
command.executeWithChecks(executionEvent);

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