將Shape類綁定到StackPane高度

Question

方案：舞臺包含場景。場景包含一個StackPane。 StackPane和Scene的高度和寬度綁定在一起。 StackPane包含一個Shape，它是Rectangle和Shape的聯合。

問題 - 我正在將Shape類綁定到StackPane的高度時遇到問題。如何在我的示例中綁定Shape類的特定部分或完整的Shape類？

要求 - 我有2個要求。

1. 當我最大化階段，StackPane得到增加，因爲 高度和寬度綁定到場景但形狀不增加。 I 需要形狀的（smallShape和bigRectangle）僅在高度方面增加 。
2. 當我最大化階段時，StackPane應該增加，只有更大的矩形高度應該增加，但不應該增加其他的小矩形，即bigRectangle高度應該只增加。

下面是我的代碼片斷

package application; 

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.scene.shape.RectangleBuilder; 
import javafx.scene.shape.Shape; 
import javafx.stage.Stage; 

public class BindingShape extends Application { 

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

     StackPane stackPane = new StackPane(); 
     stackPane.setPrefHeight(200); 
     stackPane.setPrefWidth(200); 
     stackPane.setStyle("-fx-background-color: BEIGE"); 
     Shape smallShape = RectangleBuilder.create() 
       .x(0) 
       .y(3) 
       .arcWidth(6) 
       .arcHeight(6) 
       .width(50) // allow overlap for union of tab and content rectangle 
       .height(50) 
       .build(); 

     Rectangle bigRectangle = RectangleBuilder.create() 
       .x(25) 
       .y(0) 
       .arcWidth(10) 
       .arcHeight(10) 
       .width(100) 
       .height(100) 
       .build(); 
     Shape unionShape = Shape.union(smallShape, bigRectangle); 
     unionShape.setFill(Color.rgb(0, 0, 0, .50)); 
     unionShape.setStroke(Color.BLUE); 

     Group shapeGroup = new Group(); 
     shapeGroup.getChildren().add(unionShape); 
     stackPane.getChildren().add(shapeGroup); 

     Group paneGroup = new Group(); 
     paneGroup.getChildren().add(stackPane); 

     Scene scene = new Scene(paneGroup, 400, 400,Color.LIGHTSKYBLUE); 
     stackPane.prefHeightProperty().bind(scene.heightProperty().divide(2)); 
     stackPane.prefWidthProperty().bind(scene.widthProperty().divide(2)); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 
    public static void main(String[] args) { 
     launch(args); 
    } 

} 

請讓我知道解決的辦法。提前致謝。

Answer 1

由於工會不能在部分來調整，我將重建工會如果容器已調整就像：

public class BindStackPaneToScene extends Application { 
    Shape union; 
    Shape makeShape(double w, double h) { 
     Rectangle smallShape = new Rectangle(0, 3, 50, 50); 
     smallShape.setArcHeight(6); 
     smallShape.setArcWidth(6); 

     Rectangle bigRectangle = new Rectangle(25, 3, w/2, h/2); 
     bigRectangle.setArcHeight(10); 
     bigRectangle.setArcWidth(10); 

     Shape unionShape = Shape.union(smallShape, bigRectangle); 
     unionShape.setFill(Color.rgb(0, 0, 0, .50)); 
     unionShape.setStroke(Color.BLUE); 

     return unionShape; 
    } 

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

     StackPane stackPane = new StackPane(); 
     stackPane.setPrefHeight(200); 
     stackPane.setPrefWidth(200); 
     stackPane.setStyle("-fx-background-color: BEIGE"); 

     union = makeShape(200,200); 

     Group shapeGroup = new Group(); 
     shapeGroup.getChildren().add(union); 
     stackPane.getChildren().add(shapeGroup); 

     stackPane.heightProperty().addListener((p, o, n) -> { 
      if (union != null) shapeGroup.getChildren().remove(union); 
      union = makeShape(stackPane.getWidth(), n.doubleValue()); 
      shapeGroup.getChildren().add(union); 
     }); 

     Group paneGroup = new Group(); 
     paneGroup.getChildren().add(stackPane); 

     Scene scene = new Scene(paneGroup, 400, 400,Color.LIGHTSKYBLUE); 
     stackPane.prefHeightProperty().bind(scene.heightProperty().divide(1)); 
     stackPane.prefWidthProperty().bind(scene.widthProperty().divide(1)); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 
    public static void main(String[] args) { 
     launch(args); 
    } 

}