JavaFX應用轉換似乎阻止KeyEvents

Question

關於：我有一個面板顯示由多邊形和線構成的地圖。在這張地圖上，我應用了轉換，並提供了一種通過旋轉和移動地圖（第一人稱）來轉換地圖的方式。

應用於地圖的轉換似乎阻止（或至少放緩）KeyEvent處理了beeing。有時，即使我釋放了密鑰，應用程序仍然在旋轉。

另外我注意到旋轉變換對這個效果有更大的影響。

碰撞檢測對此沒有影響（因爲此時它被禁用）。

由於應用程序的結構，我將centerR綁定到pointerR。應用

centerR.bind(pointerR); 

轉換：

mapElements = new Group(); 

Scale s = new Scale(); 
s.xProperty().bind(zoom); 
s.yProperty().bind(zoom); 
s.setPivotX(panelBounds.getWidth()/2); 
s.setPivotY(panelBounds.getHeight()/2); 

mapElements.getTransforms().add(s); 

Translate t = new Translate(); 
t.xProperty().bind(new SimpleDoubleProperty(panelBounds.getWidth()/2).subtract(centerX)); 
t.yProperty().bind(new SimpleDoubleProperty(panelBounds.getHeight()/2).subtract(centerY)); 

mapElements.getTransforms().add(t); 

Rotate r = new Rotate(); 
r.angleProperty().bind(centerR.multiply(-1)); 
r.pivotXProperty().bind(centerX); 
r.pivotYProperty().bind(centerY); 

mapElements.getTransforms().add(r); 

的KeyListener-設置：

setOnKeyPressed(new EventHandler<KeyEvent>() 
{ 
    @Override 
    public void handle(KeyEvent event) 
    { 
     System.out.println(event); 
     if (event.getCode() == KeyCode.UP) 
      moveForwards = true; 
     if (event.getCode() == KeyCode.DOWN) 
      moveBackwards = true; 
     if (event.getCode() == KeyCode.LEFT) 
      rotateLeft = true; 
     if (event.getCode() == KeyCode.RIGHT) 
      rotateRight = true; 
    } 
}); 
setOnKeyReleased(new EventHandler<KeyEvent>() 
{ 
    @Override 
    public void handle(KeyEvent event) 
    { 
     System.out.println(event); 
     if (event.getCode() == KeyCode.UP) 
      moveForwards = false; 
     if (event.getCode() == KeyCode.DOWN) 
      moveBackwards = false; 
     if (event.getCode() == KeyCode.LEFT) 
      rotateLeft = false; 
     if (event.getCode() == KeyCode.RIGHT) 
      rotateRight = false; 
    } 
}); 

OnFrame-旋轉：

private final double fps  = 20; 
private final KeyFrame frame = new KeyFrame(Duration.millis(1000/fps), new EventHandler<ActionEvent>() 

{ 
@Override 
public void handle(ActionEvent event) 
    { 
     double movement = ((moveForwards ? 3 : 0) 
         + (moveBackwards ? -3 : 0)) 
         * movementSpeed; 

     double rotation = ((rotateLeft ? -3 : 0) 
         + (rotateRight ? 3 : 0)) 
         * rotateSpeed; 

     double oldX = pointerX.get(); 
     double oldY = pointerY.get(); 

     pointerX.set(pointerX.get() 
        + Math.cos((pointerR.get() - 90) * Math.PI/180) 
        * movement); 

     pointerY.set(pointerY.get() 
       + Math.sin((pointerR.get() - 90) * Math.PI/180) 
        * movement); 

     if (checkCollisions) 
      handleCollision(oldX, oldY, pointerX.get(), pointerY.get()); 
     pointerR.set(pointerR.get() + rotation); 
    } 
}); 

Answer 1

什麼節點，你呼籲setOnKeyPressed嗎？綜觀的Javadoc這種方法：

Defines a function to be called when this Node or its child Node 
has input focus and a key has been pressed. The function is called 
only if the event hasn't been already consumed during its capturing 
or bubbling phase. 

確保偵聽器添加到場景，如果它是不是已經並沒有什麼調用事件對象的消費方式。