JavaFx防止孩子觸發父母的setOnMouseEntered

Question

一個非常簡單的問題，我希望有一個簡單的答案。

我有一個複雜的自定義節點來擴展組。

當孩子徘徊時，我該如何防止JavaFx爲本集團發射setOnMouseEntered事件？

setMouseTransparent hackery似乎沒有辦法。

Answer 1

我做了一個簡單的測試應用和集團沒有獲得鼠標事件：

private static final class Foo extends Group { 
    Foo() { 
     final Rectangle blue = new Rectangle(100, 100, Color.BLUE); 
     blue.setLayoutX(50); 
     blue.setLayoutY(50); 
     blue.setOnMouseEntered(e -> System.out.println("Entered blue")); 

     final Rectangle green = new Rectangle(100, 100, Color.GREEN); 
     green.setLayoutX(250); 
     green.setLayoutY(90); 
     green.setOnMouseEntered(e -> System.out.println("Entered green")); 

     final Rectangle red = new Rectangle(100, 100, Color.RED); 
     red.setLayoutX(100); 
     red.setLayoutY(200); 
     red.setOnMouseEntered(e -> System.out.println("Entered red")); 

     getChildren().addAll(blue, green, red); 
    } 
} 

@Override 
public void start(final Stage primaryStage) throws Exception { 
    final Pane root = new AnchorPane(); 
    final Foo foo = new Foo(); 
    root.getChildren().add(foo); 
    final Scene scene = new Scene(root); 
    primaryStage.setScene(scene); 
    primaryStage.show(); 
} 

public static void main(String[] args) { 
    launch(args); 
} 

這是因爲鼠標採摘的實現：

Node#contains實施爲

public boolean contains(double localX, double localY) { 
    if (containsBounds(localX, localY)) { 
     return (isPickOnBounds() || impl_computeContains(localX, localY)); 
    } 
    return false; 
} 

和impl_computeContains在父這是

組

protected boolean impl_computeContains(double localX, double localY) { 
    final Point2D tempPt = TempState.getInstance().point; 
    for (int i=0, max=children.size(); i<max; i++) { 
     final Node node = children.get(i); 
     tempPt.x = (float)localX; 
     tempPt.y = (float)localY; 
     try { 
      node.parentToLocal(tempPt); 
     } catch (NoninvertibleTransformException e) { 
      continue; 
     } 
     if (node.contains(tempPt.x, tempPt.y)) { 
      return true; 
     } 
    } 
    return false; 
}