如何限制物品的可见性?

问题描述

假设我们有一个AnchorPane，它有一个子级Pane，例如，我们有一个Button.
我希望仅在此Pane内部显示此Button.
换句话说，如果Pane不在Pane内，则应将其切掉.现在，即使Button不在Pane矩形内，也可以看到.

Imagine that we have an AnchorPane, it has child Pane and there we have Button, for example.
I want this Button to be shown only inside this Pane.
In other words, it whould be cut by the Pane edges if it is not completely within Pane. Now the Button can be visible even if it is out of Pane rectangle.

推荐答案

这是剪辑.

示例:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;


public class ClipTest extends Application {

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

  @Override
  public void start(Stage primaryStage) throws Exception {

    Group root = new Group();

    StackPane pane = new StackPane();

    pane.setMaxWidth(100);
    pane.setMaxHeight(100);
    pane.setLayoutX(50);
    pane.setLayoutY(50);


    Rectangle rect = new Rectangle(100, 100);

    rect.setFill(null);
    rect.setStroke(Color.RED);

    Rectangle rect2 = new Rectangle(150, 150);

    rect2.setFill(Color.BLUE);

    pane.getChildren().addAll(rect2, rect);

    root.getChildren().add(pane);


//    Rectangle clip = new Rectangle(100, 100);
//    clip.setLayoutX(25);
//    clip.setLayoutY(25);
//    pane.setClip(clip);

    Scene scene = new Scene(root, 250, 250);

    primaryStage.setScene(scene);
    primaryStage.show();
  }
}

这将产生:

取消注释有关剪辑的行会产生:

Uncommenting the lines regarding the clip produces:

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