import com.intellij.openapi.application.ApplicationAdapter; //导入依赖的package包/类
/** Begins listening on changes in the background. */
public synchronized void startBackgroundListening() {
  if (watchTimer == null) {
    watchTimer = new Timer("cloud debug watcher", true /* isDaemon */);
    watchTimer.schedule(new CloudDebugGlobalPollerTimerTask(this), DELAY_MS, DELAY_MS);

    ApplicationManager.getApplication()
        .addApplicationListener(
            new ApplicationAdapter() {
              @Override
              public void applicationExiting() {
                if (watchTimer != null) {
                  watchTimer.cancel();
                }
              }
            });
  }
}
 

import com.intellij.openapi.application.ApplicationAdapter; //导入依赖的package包/类
static void watchForEvents(Application application) {
  AtomicBoolean reported = new AtomicBoolean();
  IdeEventQueue.getInstance().addPostprocessor(e -> {
    if (application.isWriteAccessAllowed() && reported.compareAndSet(false, true)) {
      LOG.error("AWT events are not allowed inside write action: " + e);
    }
    return true;
  }, application);

  application.addApplicationListener(new ApplicationAdapter() {
    @Override
    public void afterWriteActionFinished(@Nonnull Object action) {
      reported.set(false);
    }
  });
}
 

import com.intellij.openapi.application.ApplicationAdapter; //导入依赖的package包/类
@NotNull
public static ProgressIndicator forceWriteActionPriority(@NotNull final ProgressIndicator progress, @NotNull final Disposable builder) {
  ApplicationManager.getApplication().addApplicationListener(new ApplicationAdapter() {
      @Override
      public void beforeWriteActionStart(Object action) {
        if (progress.isRunning()) {
          progress.cancel();
        }
      }
    }, builder);
  return progress;
}
 

import com.intellij.openapi.application.ApplicationAdapter; //导入依赖的package包/类
@Nonnull
public static ProgressIndicator forceWriteActionPriority(@Nonnull ProgressIndicator progress, @Nonnull Disposable parentDisposable) {
  ApplicationManager.getApplication().addApplicationListener(new ApplicationAdapter() {
    @Override
    public void beforeWriteActionStart(@Nonnull Object action) {
      if (progress.isRunning()) {
        progress.cancel();
      }
    }
  }, parentDisposable);
  return progress;
}
 

import com.intellij.openapi.application.ApplicationAdapter; //导入依赖的package包/类
protected void showTextFieldPanel() {
  final JLayeredPane layeredPane = getLayeredPane();
  final Dimension preferredTextFieldPanelSize = myTextFieldPanel.getPreferredSize();
  final int x = (layeredPane.getWidth() - preferredTextFieldPanelSize.width) / 2;
  final int paneHeight = layeredPane.getHeight();
  final int y = paneHeight / 3 - preferredTextFieldPanelSize.height / 2;

  VISIBLE_LIST_SIZE_LIMIT = Math.max
    (10, (paneHeight - (y + preferredTextFieldPanelSize.height)) / (preferredTextFieldPanelSize.height / 2) - 1);

  ComponentPopupBuilder builder = JBPopupFactory.getInstance().createComponentPopupBuilder(myTextFieldPanel, myTextField);
  builder.setCancelCallback(new Computable<Boolean>() {
    @Override
    public Boolean compute() {
      myTextPopup = null;
      close(false);
      return Boolean.TRUE;
    }
  }).setFocusable(true).setRequestFocus(true).setModalContext(false).setCancelOnClickOutside(false);

  Point point = new Point(x, y);
  SwingUtilities.convertPointToScreen(point, layeredPane);
  Rectangle bounds = new Rectangle(point, new Dimension(preferredTextFieldPanelSize.width + 20, preferredTextFieldPanelSize.height));
  myTextPopup = builder.createPopup();
  myTextPopup.setSize(bounds.getSize());
  myTextPopup.setLocation(bounds.getLocation());

  new MnemonicHelper().register(myTextFieldPanel);
  if (myProject != null && !myProject.isDefault()) {
    DaemonCodeAnalyzer.getInstance(myProject).disableUpdateByTimer(myTextPopup);
  }

  Disposer.register(myTextPopup, new Disposable() {
    @Override
    public void dispose() {
      cancelCalcElementsThread();
    }
  });
  ApplicationManager.getApplication().addApplicationListener(new ApplicationAdapter() {
    @Override
    public void beforeWriteActionStart(Object action) {
      CalcElementsThread prevThread = cancelCalcElementsThread();
      if (prevThread != null) {
        prevThread.scheduleRestart();
      }
    }
  }, myTextPopup);
  myTextPopup.show(layeredPane);
}