RCP 关联

 

1 ， RCP: getActiveWorkbenchWindow() returns null

Winzard结束后，想要打开一个editor，不过 getActiveWorkbenchWindow() returns null

问题及解决如下：

原因：

getActiveWorkbenchWindow（）

null can be returned for the active workbench window if:
there is a non-workbench window active (modal dialog)
you are not in a "UI thread". You will need to investigate
Display.asyncExec and Display.syncExec

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In my wizard page I ve the following code to open a diagram when the wizard process is ended :

private void openEditor(IFile file) {
  try {
   IWorkbenchWindow dwindow = workbench.getActiveWorkbenchWindow();
   IWorkbenchPage page = dwindow.getActivePage();
   if (page != null) {
    IDE.openEditor(page, file, true);
   }
  } catch (PartInitException pie) {
   Logger.error("Unable to open the Editor", pie);//$NON-NLS-1$
   throw new PageException("Unable to open the Editor", pie);
  }
}
but when I execute it I got a null pointer exception while I'm trying to call workbench.getActiveWorkbenchWindow(); the workbench is not null and don't know why it's append

 

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Finaly solved by using
private void openEditor(IFile file) {
  final IFile aFile = file;
  PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
   public void run() {
    IWorkbenchWindow dwindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
    IWorkbenchPage page = dwindow.getActivePage();
    if (page != null) {
     try {
      IDE.openEditor(page, aFile, true);
     }catch (PartInitException pie) {
      Logger.error("Unable to open the Editor", pie);//$NON-NLS-1$
      throw new PageException("Unable to open the Editor", pie);
     }
    }    
   }
  });
}

 

解决方法

*******************************************************非UI线程到UI线程内操作*****************************************************

PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
   public void run() {

     

      IWorkbenchWindow dwindow = PlatformUI.getWorkbench().getActiveWorkbenchWindow();

      ..........some code

 

      }
  });

 

2，