JAVAFX画布上MouseScroll上的JavaFx绘制和缩放SVG线放大和缩小

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.input.ScrollEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.CubicCurveTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.stage.Stage;

public class Main extends Application {

    private static final double LINE_WIDTH = 2.0;
    private static final double SCALE_FACTOR = 1.1;

    @Override
    public void start(Stage primaryStage) {
        Canvas canvas = new Canvas(400, 400);
        GraphicsContext gc = canvas.getGraphicsContext2D();

        // 绘制初始的SVG线
        drawSVGLine(gc);

        // 监听MouseScroll事件
        canvas.setOnScroll(event -> {
            double delta = event.getDeltaY();
            if (delta > 0) {
                // 放大SVG线
                scaleSVGLine(gc, SCALE_FACTOR);
            } else {
                // 缩小SVG线
                scaleSVGLine(gc, 1 / SCALE_FACTOR);
            }
        });

        StackPane root = new StackPane(canvas);
        Scene scene = new Scene(root, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void drawSVGLine(GraphicsContext gc) {
        gc.setStroke(Color.BLACK);
        gc.setLineWidth(LINE_WIDTH);

        Path path = new Path();
        path.getElements().add(new MoveTo(50, 50));
        path.getElements().add(new CubicCurveTo(150, 150, 250, 150, 350, 50));

        gc.strokePath(path);
    }

    private void scaleSVGLine(GraphicsContext gc, double scaleFactor) {
        gc.clearRect(0, 0, gc.getCanvas().getWidth(), gc.getCanvas().getHeight());

        gc.scale(scaleFactor, scaleFactor);
        drawSVGLine(gc);
        gc.scale(1 / scaleFactor, 1 / scaleFactor);
    }

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