Javafx Htmleditor文本在5秒内更改

Question

我想出了一个问题，我很难找到解决方法。我有一个HTMleditor事件，该事件检测到何时按下键，但是我需要创建一个侦听器来检查HTMLEDitor文本是否更改了，我想到了这一点：

htmlEditor.setOnKeyPressed((keyEvent) ->{
                            if(keyEvent.getCode().isDigitKey() || keyEvent.getCode().isLetterKey() ||
                            keyEvent.getCode().isModifierKey() || keyEvent.getCode().isWhitespaceKey() ||
                            keyEvent.isShiftDown()){
                                handleWhoTypes(null);     
                            }  
                        });
                        PauseTransition timer = new PauseTransition(Duration.seconds(5));
                        htmlEditor.textProperty().addListener((obs, oldText, newText) ->
                            timer.playFromStart());
                        timer.setOnFinished(e -> handleIsPaused(null));
        }

但这不起作用，因为htmleditor没有textproperty（），我想不出其他解决方案。预先感谢您。

Answer 1

看起来您必须进行轮询编辑的文本：

Runnable textMonitor = new Runnable() {
    private String previousText;
    @Override
    public void run() {
        String newText = htmlEditor.getHtmlText();
        boolean changed = !newText.equals(previousText);
        previousText = newText;
        if (changed) {
            timer.playFromStart();
        }
    }
};
BooleanBinding windowShowing = Bindings.selectBoolean(
    htmlEditor.sceneProperty(), "window", "showing");
windowShowing.addListener(
    new ChangeListener<Boolean>() {
        private ScheduledExecutorService executor;
        @Override
        public void changed(ObservableValue<? extends Boolean> o,
                            Boolean old,
                            Boolean showing) {
            if (showing) {
                executor = Executors.newSingleThreadScheduledExecutor();
                executor.scheduleWithFixedDelay(
                    () -> Platform.runLater(textMonitor),
                    1, 1, TimeUnit.SECONDS);
            } else {
                executor.shutdown();
            }
        }
    });