IMAU——JavaFX-圆的缩放控制

科技前沿 • 2025-01-14 16:10 • 阅读 78

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作业内容要求：

1、使用BorderPane、StackPane、HBox、Button、Circle组件；

 import javafx.application.Application; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.StackPane; import javafx.scene.layout.HBox; import javafx.scene.layout.BorderPane; import javafx.scene.paint.Color; import javafx.scene.shape.Circle; import javafx.stage.Stage; public class HelloApplication extends Application { private CirclePane circlePane = new CirclePane(); @Override public void start(Stage primaryStage) { HBox hBox = new HBox(); hBox.setSpacing(10); hBox.setAlignment(Pos.CENTER); Button btEnlarge = new Button("Enlarge"); Button btShrink = new Button("Shrink"); hBox.getChildren().add(btEnlarge); hBox.getChildren().add(btShrink); btEnlarge.setOnAction(new EnlargeHandler()); btShrink.setOnAction(new ShrinkHandler()); BorderPane borderPane = new BorderPane(); borderPane.setCenter(circlePane); borderPane.setBottom(hBox); BorderPane.setAlignment(hBox, Pos.CENTER); Scene scene = new Scene(borderPane, 200, 150); primaryStage.setTitle("ControlCirle"); primaryStage.setScene(scene); primaryStage.show(); } public class EnlargeHandler implements EventHandler<ActionEvent> { @Override public void handle(ActionEvent event) { circlePane.enlarge(); } } public class ShrinkHandler implements EventHandler<ActionEvent> { @Override public void handle(ActionEvent event) { circlePane.shrink(); } } } class CirclePane extends StackPane { private Circle circle = new Circle(50); public CirclePane() { getChildren().add(circle); circle.setStroke(Color.BLACK); circle.setFill(Color.WHITE); } public void enlarge() { circle.setRadius(circle.getRadius() + 2); } public void shrink() { circle.setRadius(circle.getRadius() > 2 ? circle.getRadius() - 2 : circle.getRadius()); } public static void main(String[] args) { Application.launch(args); } }

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IMAU——JavaFX-圆的缩放控制

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