javafx实验

电玩女神 2022-01-26 20:47 194阅读 0赞

import javafx.animation.KeyFrame;
    import javafx.animation.Timeline;
    import javafx.application.Application;
    import javafx.geometry.Pos;
    import javafx.scene.Scene;
    import javafx.scene.control.Label;
    import javafx.scene.control.TextField;
    import javafx.scene.input.KeyCode;
    import javafx.scene.layout.BorderPane;
    import javafx.scene.layout.HBox;
    import javafx.scene.layout.Pane;
    import javafx.scene.layout.VBox;
    import javafx.scene.paint.Color;
    import javafx.scene.shape.Circle;
    import javafx.scene.shape.Polygon;
    import javafx.scene.shape.Rectangle;
    import javafx.stage.Stage;
    import javafx.util.Duration;
    
    public class Exercise16_25 extends Application {
      @Override // Override the start method in the Application class
      public void start(Stage primaryStage) {    
        TextField tfCar1 = new TextField();
        TextField tfCar2 = new TextField();
        TextField tfCar3 = new TextField();
        TextField tfCar4 = new TextField();
        tfCar1.setPrefColumnCount(2);
        tfCar2.setPrefColumnCount(2);
        tfCar3.setPrefColumnCount(2);
        tfCar4.setPrefColumnCount(2);
        
        HBox hBox = new HBox(5);
        hBox.setAlignment(Pos.CENTER);
        hBox.getChildren().addAll(new Label("Car 1: "), tfCar1,
                new Label("Car 2: "), tfCar2, new Label("Car 3: "), tfCar3,
                new Label("Car 4: "), tfCar4);
        
        VBox vBox = new VBox(5);
        CarPane car1 = new CarPane();
        CarPane car2 = new CarPane();
        CarPane car3 = new CarPane();
        CarPane car4 = new CarPane();
        
        vBox.getChildren().addAll(car1, car2, car3, car4);
        
        BorderPane pane = new BorderPane();
        pane.setTop(hBox);
        pane.setCenter(vBox);
    
        // Create a scene and place it in the stage
        Scene scene = new Scene(pane, 400, 200);
        primaryStage.setTitle("Exercise16_25"); // Set the stage title
        primaryStage.setScene(scene); // Place the scene in the stage
        primaryStage.show(); // Display the stage
        
        tfCar1.setOnAction(e -> car1.setSpeed(
                Integer.parseInt(tfCar1.getText())));
        tfCar2.setOnAction(e -> car2.setSpeed(
                Integer.parseInt(tfCar2.getText())));
        tfCar3.setOnAction(e -> car3.setSpeed(
                Integer.parseInt(tfCar3.getText())));
        tfCar4.setOnAction(e -> car4.setSpeed(
                Integer.parseInt(tfCar4.getText())));
        
        car1.widthProperty().addListener(e -> car1.setW(car1.getWidth()));
        car2.widthProperty().addListener(e -> car2.setW(car2.getWidth()));
        car3.widthProperty().addListener(e -> car3.setW(car3.getWidth()));
        car4.widthProperty().addListener(e -> car4.setW(car4.getWidth()));
      }
    
      /**
       * The main method is only needed for the IDE with limited
       * JavaFX support. Not needed for running from the command line.
       */
      public static void main(String[] args) {
        launch(args);
      }
    }
    
    class CarPane extends Pane {
    
      private double w = 200;
      private double h = 40;
      private double baseX = 0;
      private double baseY = h;
      private Circle c1 = new Circle(baseX + 10 + 5, baseY - 10 + 5, 5);
      private Circle c2 = new Circle(baseX + 30 + 5, baseY - 10 + 5, 5);
      
      private Rectangle carBody = new Rectangle(baseX, baseY - 20, 50, 10);
      private Polygon carTop = new Polygon(baseX + 10, baseY - 20,
              baseX + 20, baseY - 30, baseX + 30, baseY - 30,
              baseX + 40, baseY - 20);  
      private int speed = 50;
      
      KeyFrame kf = new KeyFrame(Duration.millis(150 - speed), e -> move());
      
      Timeline animation = new Timeline(
        new KeyFrame(Duration.millis(150 - speed), e -> move()));
      
      public void setSpeed(int speed) {    
        animation.setRate(speed);
      }
      
      public CarPane() {
        this.setStyle("-fx-border-color: black");
        
        carBody.setFill(Color.GREEN);
        carTop.setFill(Color.RED);
        this.getChildren().addAll(c1, c2, carBody, carTop);
        
        animation.setCycleCount(Timeline.INDEFINITE);
        animation.play(); // Start animation
        
        setOnMousePressed(e -> {
          animation.pause();
        });
        setOnMouseReleased(e -> {
          animation.play();
        });
        
        requestFocus();
        setOnKeyPressed(e -> {
          if (e.getCode() == KeyCode.UP) {
            animation.setRate(animation.getRate() + 1);
          } else if (e.getCode() == KeyCode.DOWN) {
            animation.setRate(animation.getRate() - 1);
          }
        });
        
      }
      
      public void move() {
        if (baseX > w) {
          baseX = -20;
        } else {
          baseX += 1;
        }
        
        setValues();
      }
      
      public void setValues() {
        c1.setCenterX(baseX + 10 + 5);
        c1.setCenterY(baseY - 10 + 5);
        c2.setCenterX(baseX + 30 + 5);
        c2.setCenterY(baseY - 10 + 5);
        
        carBody.setX(baseX);
        carBody.setY(baseY - 20);
        
        carTop.getPoints().clear();
        carTop.getPoints().addAll(baseX + 10, baseY - 20,
                baseX + 20, baseY - 30, baseX + 30, baseY - 30,
                baseX + 40, baseY - 20);    
      }
      
      public void setW(double w) {
        this.w = w;
        setValues();
      }
      
      public void setH(double h) {
        this.h = h;
        baseY = h;
        setValues();
      }
    }