210 lines
11 KiB
HTML
210 lines
11 KiB
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<title>MultipleBallsWithComparator.java</title>
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<table width="100%"><tr><td align="center">/home/caleb/ASDV-Java/Semester 3/Assignments/JavaFXBallsWithComparator/src/main/java/edu/slcc/asdv/caleb/javafxballswithcomparator/MultipleBallsWithComparator.java</td></tr></table>
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<pre>
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<span class="literal">package</span> edu.slcc.asdv.caleb.javafxballswithcomparator;
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<span class="literal">import</span> javafx.animation.KeyFrame;
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<span class="literal">import</span> javafx.animation.Timeline;
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<span class="literal">import</span> javafx.application.Application;
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<span class="literal">import</span> javafx.beans.property.DoubleProperty;
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<span class="literal">import</span> javafx.geometry.Pos;
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<span class="literal">import</span> javafx.scene.Node;
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<span class="literal">import</span> javafx.stage.Stage;
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<span class="literal">import</span> javafx.scene.Scene;
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<span class="literal">import</span> javafx.scene.control.Button;
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<span class="literal">import</span> javafx.scene.control.ScrollBar;
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<span class="literal">import</span> javafx.scene.layout.BorderPane;
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<span class="literal">import</span> javafx.scene.layout.HBox;
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<span class="literal">import</span> javafx.scene.layout.Pane;
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<span class="literal">import</span> javafx.scene.paint.Color;
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<span class="literal">import</span> javafx.scene.shape.Circle;
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<span class="literal">import</span> javafx.util.Duration;
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<span class="literal">public</span> <span class="literal">class</span> MultipleBallsWithComparator <span class="literal">extends</span> Application
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{
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@Override <span class="comment">// Override the start method in the Application class</span>
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<span class="literal">public</span> <span class="literal">void</span> start(Stage primaryStage)
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{
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MultipleBallPane ballPane = <span class="literal">new</span> MultipleBallPane();
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Button btAdd = <span class="literal">new</span> Button(<span class="string">"</span><span class="string">+</span><span class="string">"</span>);
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Button btSubtract = <span class="literal">new</span> Button(<span class="string">"</span><span class="string">-</span><span class="string">"</span>);
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HBox hBox = <span class="literal">new</span> HBox(<span class="number">10</span>);
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hBox.getChildren().addAll(btAdd, btSubtract);
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hBox.setAlignment(Pos.CENTER);
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<span class="comment">// Add or remove a ball</span>
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btAdd.setOnAction(e -> ballPane.add());
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btSubtract.setOnAction(e -> ballPane.subtract());
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<span class="comment">// Pause and resume animation</span>
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ballPane.setOnMousePressed(e -> ballPane.pause());
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ballPane.setOnMouseReleased(e -> ballPane.play());
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<span class="comment">// Use a scroll bar to control animation speed</span>
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ScrollBar sbSpeed = <span class="literal">new</span> ScrollBar();
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sbSpeed.setMax(<span class="number">20</span>);
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sbSpeed.setValue(<span class="number">10</span>);
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ballPane.rateProperty().bind(sbSpeed.valueProperty());
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BorderPane pane = <span class="literal">new</span> BorderPane();
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pane.setCenter(ballPane);
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pane.setTop(sbSpeed);
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pane.setBottom(hBox);
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<span class="comment">// Create a scene and place the pane in the stage</span>
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Scene scene = <span class="literal">new</span> Scene(pane, <span class="number">250</span>, <span class="number">150</span>);
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primaryStage.setTitle(<span class="string">"</span><span class="string">Multiple Bouncing Balls</span><span class="string">"</span>); <span class="comment">// Set the stage title</span>
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primaryStage.setScene(scene); <span class="comment">// Place the scene in the stage</span>
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primaryStage.show(); <span class="comment">// Display the stage</span>
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}
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<span class="literal">private</span> <span class="literal">class</span> MultipleBallPane <span class="literal">extends</span> Pane
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{
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<span class="literal">private</span> Timeline animation;
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<span class="literal">public</span> MultipleBallPane()
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{
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<span class="comment">// Create an animation for moving the ball</span>
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animation = <span class="literal">new</span> Timeline(
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<span class="literal">new</span> KeyFrame(Duration.millis(<span class="number">50</span>), e -> moveBall()));
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animation.setCycleCount(Timeline.INDEFINITE);
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animation.play(); <span class="comment">// Start animation</span>
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}
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<span class="literal">public</span> <span class="literal">void</span> add()
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{
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Color color = <span class="literal">new</span> Color(Math.random(),
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Math.random(), Math.random(), <span class="number">0.5</span>);
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getChildren().add(<span class="literal">new</span> Ball(<span class="number">30</span>, <span class="number">30</span>, Math.random() * <span class="number">16</span> + <span class="number">5</span>, color));
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}
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<span class="literal">public</span> <span class="literal">void</span> subtract()
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{
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<span class="literal">if</span> (getChildren().size() > <span class="number">0</span>)
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{
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<span class="comment">//> Locate the ball with the largest radius</span>
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Ball ball = (Ball) (getChildren().get(<span class="number">0</span>));
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<span class="literal">for</span> (Node node : getChildren())
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{
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<span class="literal">if</span> (((Ball) node).getRadius() > ball.getRadius())
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{
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ball = (Ball) node;
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}
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}
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getChildren().remove(ball);
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}
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}
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<span class="literal">public</span> <span class="literal">void</span> play()
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{
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animation.play();
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}
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<span class="literal">public</span> <span class="literal">void</span> pause()
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{
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animation.pause();
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}
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<span class="literal">public</span> <span class="literal">void</span> increaseSpeed()
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{
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animation.setRate(animation.getRate() + <span class="number">0.1</span>);
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}
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<span class="literal">public</span> <span class="literal">void</span> decreaseSpeed()
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{
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animation.setRate(
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animation.getRate() > <span class="number">0</span> ? animation.getRate() - <span class="number">0.1</span> : <span class="number">0</span>);
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}
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<span class="literal">public</span> DoubleProperty rateProperty()
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{
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<span class="literal">return</span> animation.rateProperty();
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}
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<span class="literal">protected</span> <span class="literal">void</span> moveBall()
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{
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<span class="literal">for</span> (Node node : <span class="literal">this</span>.getChildren())
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{
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Ball ball = (Ball) node;
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<span class="comment">// Check boundaries</span>
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<span class="literal">if</span> (ball.getCenterX() < ball.getRadius()
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|| ball.getCenterX() > getWidth() - ball.getRadius())
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{
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ball.dx *= -<span class="number">1</span>; <span class="comment">// Change ball move direction</span>
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}
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<span class="literal">if</span> (ball.getCenterY() < ball.getRadius()
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|| ball.getCenterY() > getHeight() - ball.getRadius())
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{
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ball.dy *= -<span class="number">1</span>; <span class="comment">// Change ball move direction</span>
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}
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<span class="comment">// Adjust ball position</span>
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ball.setCenterX(ball.dx + ball.getCenterX());
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ball.setCenterY(ball.dy + ball.getCenterY());
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}
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}
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}
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<span class="literal">class</span> Ball <span class="literal">extends</span> Circle <span class="literal">implements</span> Comparable<Ball>
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{
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<span class="literal">private</span> <span class="literal">double</span> dx = <span class="number">1</span>, dy = <span class="number">1</span>;
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Ball(<span class="literal">double</span> x, <span class="literal">double</span> y, <span class="literal">double</span> radius, Color color)
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{
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<span class="literal">super</span>(x, y, radius);
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setFill(color); <span class="comment">// Set ball color</span>
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}
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<span class="literal">public</span> <span class="literal">int</span> compareTo(Ball b)
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{
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<span class="literal">if</span> (<span class="literal">this</span>.getRadius() - b.getRadius() < <span class="number">0</span>)
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{
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<span class="literal">return</span> -<span class="number">1</span>;
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}
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<span class="literal">else</span> <span class="literal">if</span> (<span class="literal">this</span>.getRadius() - b.getRadius() == <span class="number">0</span>)
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{
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<span class="literal">return</span> <span class="number">0</span>;
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}
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<span class="literal">else</span>
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{
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<span class="literal">return</span> <span class="number">1</span>;
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}
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}
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}
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<span class="comment">/**</span>
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<span class="comment"> * </span><span class="comment">The</span> <span class="comment">main</span> <span class="comment">method</span> <span class="comment">is</span> <span class="comment">only</span> <span class="comment">needed</span> <span class="comment">for</span> <span class="comment">the</span> <span class="comment">IDE</span> <span class="comment">with</span> <span class="comment">limited</span> <span class="comment">JavaFX</span> <span class="comment">support</span><span class="comment">.</span>
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<span class="comment"> * </span><span class="comment">Not</span> <span class="comment">needed</span> <span class="comment">for</span> <span class="comment">running</span> <span class="comment">from</span> <span class="comment">the</span> <span class="comment">command</span> <span class="comment">line</span><span class="comment">.</span>
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<span class="comment">*/</span>
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> main(String[] args)
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{
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launch(args);
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}
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}
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</pre></body>
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</html>
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