import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.CacheHint;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.stage.Stage;

public class Test extends Application {
    public static final int SCENEDIM = 800;
    public static final int PATHDIM = 400;
    public static final double MINSCALE = .01;
    public static void main(String argv[]) {
        launch(argv);
    }

    public static double c() {
        return Math.random() * PATHDIM + (SCENEDIM - PATHDIM) / 2.0;
    }

    double pressx, pressy;
    double origscalex, origscaley;

    @Override
    public void start(Stage stage) {
        Group root = new Group();
        final Path path = new Path();
        path.getElements().add(new MoveTo(c(), c()));
        for (int i = 0; i < 5000; i++) {
            path.getElements().add(new LineTo(c(), c()));
        }
        root.getChildren().add(path);
        path.setCache(true);
        Scene scene = new Scene(root, SCENEDIM, SCENEDIM);
        scene.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>() {
            public void handle(MouseEvent event) {
                path.setCacheHint(CacheHint.SPEED);
                pressx = event.getSceneX();
                pressy = event.getSceneY();
                origscalex = path.getScaleX();
                origscaley = path.getScaleY();
            }
        });
        scene.addEventHandler(MouseEvent.MOUSE_DRAGGED, new EventHandler<MouseEvent>() {
            public void handle(MouseEvent event) {
                double dx = event.getSceneX() - pressx;
                double dy = event.getSceneY() - pressy;
                double newscalex = Math.max(((origscalex * 200) + dx) / 200, MINSCALE);
                double newscaley = Math.max(((origscaley * 200) + dy) / 200, MINSCALE);
                path.setScaleX(newscalex);
                path.setScaleY(newscaley);
            }
        });
        scene.addEventHandler(MouseEvent.MOUSE_RELEASED, new EventHandler<MouseEvent>() {
            public void handle(MouseEvent event) {
                path.setCacheHint(CacheHint.QUALITY);
            }
        });
        stage.setScene(scene);
        stage.show();
    }
}