Question

我在JavaFX中构建了一个矩形。我的场景宽度为300，我的矩形宽度为80.

Rectangle.setX设置Rectangle左上角的位置。我将setX设置为obScene.getWidth（） - carRightSide并且它没有触及右侧。

我做错了什么？

    package assign3;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Question4 extends Application
{

    public int carRightSide;

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

        Pane obPane = new Pane();

        Circle obWheelOne = new Circle(20, Color.BLACK);
        obWheelOne.setRadius(20);
        Circle obWheelTwo = new Circle(20, Color.BLACK);
        obWheelTwo.setRadius(20);

        Rectangle obBody = new Rectangle(80, 40, Color.LIGHTBLUE);


        obPane.getChildren().add(obWheelOne);
        obPane.getChildren().add(obBody);

        Scene obScene = new Scene(obPane, 300, 350);

        carRightSide = 80;
        obBody.setX(obScene.getWidth() - carRightSide);
        obBody.setY(40);

        obPrimeStage.setTitle("Driving Cars");
        obPrimeStage.setScene(obScene);
        obPrimeStage.setResizable(false);
        obPrimeStage.show();


    }

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

    }

}

Answer 1

在使用obPrimeStage.show();的{{1}}之前，您必须致电.getWidth()。

Scene

或者您可以在设置public class Question4 extends Application { public int carRightSide = 80; @Override public void start( Stage obPrimeStage ) throws Exception { Pane obPane = new Pane(); Scene obScene = new Scene(obPane, 300, 350, Color.ANTIQUEWHITE); obPrimeStage.setScene(obScene);//Add scene here obPrimeStage.setTitle("Driving Cars"); obPrimeStage.setResizable(false); obPrimeStage.show();//Show Stage so that the size will be calculated Circle obWheelOne = new Circle(20, Color.BLACK); obWheelOne.setRadius(20); Circle obWheelTwo = new Circle(20, Color.BLACK); obWheelTwo.setRadius(20); Rectangle obBody = new Rectangle(carRightSide, 40, Color.LIGHTBLUE); obBody.setX(obScene.getWidth() - carRightSide); obBody.setY(40); obPane.getChildren().add(obBody); obPane.getChildren().add(obWheelOne); obPane.getChildren().add(obWheelTwo); } public static void main( String[] args ) { Application.launch(args); } }

后调整Stage的尺寸

Scene

JavaFX矩形不会触摸右侧

1 个答案: