java - 如何更新/刷新 eclipse 插件中的 View ？

Question

我有一个eclipse 插件，带有一个 View (例如eclipse helloworld-view-plugin-project)。在 View 文件中，当我想更新 View 时，我得到一个事件。

在这个 View 中，我在具有多个标签的组中有一个 GridData。我有几个注册到程序的服务，其状态应显示在此 GridData 中。

编辑:为了更好地展示我的问题，我更新了这篇文章并添加了整个代码:

---

CreatePartControl():

public void createPartControl(Composite _parent) {
  parent = _parent;
  createContents();
  addBindings();
  makeActions();
  contributeToActionBars();
}

CreateContents():

protected void createContents() {

  // fixed
  checkIcon = //...
  errorIcon = //...
  smallFont = SWTResourceManager.getFont("Segoe UI", 7, SWT.NORMAL);

  // content
  gl_shell = new GridLayout(1, false);
  //margins, etc. for gl_shell
  parent.setLayout(gl_shell);

  final Label lblGreeting = new Label(parent, SWT.NONE);
  lblGreeting.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false, 1, 1));
  lblGreeting.setText("Hi " + Preferences.getPreName());

  // -- GROUP YOUR STATS (show all services)
  createStatusGroupBox();
}

createStatusGroupBox():

private Group grpYourStatus = null; // outside the method for access in listener (below)

private void createStatusGroupBox() {
  grpYourStatus = new Group(parent, SWT.NONE);
  grpYourStatus.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false, 1, 1));
  grpYourStatus.setText("Your upload status");
  grpYourStatus.setLayout(new GridLayout(3, false));

  // add message if no service is registered
  if ( r.getServiceList().size() == 0 ) {
     Label status = new Label(grpYourStatus, SWT.NONE);
     status.setText("No service registered.");
     new Label(grpYourStatus, SWT.NONE); //empty
     new Label(grpYourStatus, SWT.NONE); //empty
  }

  // add labels (status, message, name) for each registered service
  for ( IRecorderObject service : r.getServiceList() ) {
     Label name = new Label(grpYourStatus, SWT.NONE);
     Label status = new Label(grpYourStatus, SWT.NONE);
     Label message = new Label(grpYourStatus, SWT.NONE);
     message.setFont(smallFont);
     message.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));

     service.getServiceViewItem().setLabelsAndIcons(name, status, message, checkIcon, errorIcon); //this also sets the values of the labels (label.setText(...) via data binding)
}

---

不幸的是，我不知道更新/重置它的正确方法是什么。我尝试了以下方法:

监听器(应该更新 View /服务列表):

r.addPropertyChangeListener(BindingNames.SERVICE_ADDED, new PropertyChangeListener() {
  public void propertyChange(final PropertyChangeEvent evt) {   
    Display.getDefault().asyncExec(new Runnable() {
      public void run() {
        // This "redraws" the view, but just places the whole content (generated in createStatusGroupBox()) above the other parts.
        //Display.getCurrent().update();
        //createStatusGroupBox();
        //parent.layout(true);
        //parent.redraw();

        // disposes grpYourStatus-Group but doesn't show anything then
        grpYourStatus.dispose();
        createStatusGroupBox();
        grpYourStatus.layout();
        grpYourStatus.redraw(); 
      }
    });
  }
});

我还尝试了以下语句(单独)；都没有成功:

parent.redraw();
parent.update();
parent.layout();
parent.layout(true);
parent.refresh();

---

在此post我阅读了以下内容:

createPartControls is that time of the life cycle of a view, where its contained widgets are created (when the view becomes visible initially). This code is only executed once during the view life cycle, therefore you cannot add anything here directly to refresh your view.

Eclipse parts typically update their content as a reaction to a changed selection inside of the workbench (e.g. the user might click on another stack frame in the debug view).

不幸的是，我不知道还能尝试什么，而且我没有找到任何对搜索有帮助的东西...感谢您的帮助和建议!

Answer 1

我终于找到了答案(在 AndreiC 的帮助下!):

我的听众现在看起来像这样:

r.addPropertyChangeListener(BindingNames.SERVICE_ADDED, new PropertyChangeListener() {
  public void propertyChange(final PropertyChangeEvent evt) {   
    Display.getDefault().asyncExec(new Runnable() {
      public void run() {
         // remove grpYourStatus from parent
         grpYourStatus.dispose();

         // add grpYourStatus (with updated values) to parent
         createStatusGroupBox();

         // refresh view
         parent.pack();
         parent.layout(true);
      }
    });
  }
});

其余的和上面的代码一样。