如何在JavaFX中偵聽調整大小事件

Question

如何檢測場景或舞臺在JavaFX 2.1中更改大小的時間？我找不到任何EventHandler。

Answer 1

有heightProperty和widthProperty。您可以使用這些屬性進行綁定，或將偵聽器添加到它們。

public void start(Stage stage) { 
    Scene scene = new Scene(new Group(), 300, 200); 
    stage.setScene(scene); 

    stage.titleProperty().bind(
      scene.widthProperty().asString(). 
      concat(" : "). 
      concat(scene.heightProperty().asString())); 

    stage.show(); 
} 

還是看下面的例子：

（注：有可能更好的方法來https://stackoverflow.com/a/9893911/1054140

Answer 2

A之後重新上漿一個場景結束，你可以做到這一點執行操作方式做到這一點，對我來說，做的工作）

final Stage primaryStage = getStage() // get your stage from somewhere 

// create a listener 
final ChangeListener<Number> listener = new ChangeListener<Number>() 
{ 
    final Timer timer = new Timer(); // uses a timer to call your resize method 
    TimerTask task = null; // task to execute after defined delay 
    final long delayTime = 200; // delay that has to pass in order to consider an operation done 

    @Override 
    public void changed(ObservableValue<? extends Number> observable, Number oldValue, final Number newValue) 
    { 
    if (task != null) 
    { // there was already a task scheduled from the previous operation ... 
     task.cancel(); // cancel it, we have a new size to consider 
    } 

    task = new TimerTask() // create new task that calls your resize operation 
    { 
     @Override 
     public void run() 
     { 
     // here you can place your resize code 
     System.out.println("resize to " + primaryStage.getWidth() + " " + primaryStage.getHeight()); 
     } 
    }; 
    // schedule new task 
    timer.schedule(task, delayTime); 
    } 
}; 

// finally we have to register the listener 
primaryStage.widthProperty().addListener(listener); 
primaryStage.heightProperty().addListener(listener); 

Answer 3

這是太舊，基本的，但它可以幫助一個noob像我

您可以添加

stage.heightProperty().addListener(e ->{ 
    handle.... 
}); 

stage.widthProperty().addListener(e ->{ 
    handle.... 
});