How to restrict visibility of items?

Question

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.

Answer 1

this is what the clip of a node is made for.

Example:

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();
  }
}

This produces:

Uncommenting the lines regarding the clip produces: