import com.sun.glass.ui.Robot;
import com.sun.javafx.perf.PerformanceTracker;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Popup;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;

public class HelloPopupPerformance extends Application {

    // using the VGA size by default
    static double SCREEN_WIDTH = 640.0;
    static double SCREEN_HEIGHT = 480.0;

    static int WARMUP_CYCLES = 5;
    static int MEASURE_CYCLES = 20;
    long cycles = WARMUP_CYCLES + MEASURE_CYCLES;

    long startTime = -1;
    long summaryLatency = 0;

    @Override public void start(final Stage stage) {

        final Popup popup = new Popup();
        popup.setAutoHide(true);
        popup.sizeToScene();
        
        Text text = new Text("Popup performance test");
        ImageView imageView = new ImageView("linux_small.png");

        VBox vb = new VBox();
        vb.getChildren().addAll(text, imageView);
        vb.setPrefSize(SCREEN_WIDTH, SCREEN_HEIGHT);
        vb.setAlignment(Pos.CENTER);
        popup.getContent().add(vb);
        popup.getScene().setFill(Color.WHITE);

        stage.setTitle("Hello Popup");
        stage.setWidth(SCREEN_WIDTH);
        stage.setHeight(SCREEN_HEIGHT);

        Button b = new Button("Open a Popup");
        Scene s = new Scene(new Group(b));
        s.setFill(Color.LIGHTBLUE);
        stage.setScene(s);
        stage.show();

        final Robot robot = com.sun.glass.ui.Application.GetApplication().createRobot();
        s.addEventFilter(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
            @Override
            public void handle(MouseEvent event) {
                popup.show(stage);
            }
        });

        Runnable roboActions = new Runnable() {
            @Override
            public void run() {

                startTime = System.nanoTime();
                robot.mousePress(Robot.MOUSE_LEFT_BTN);
                robot.mouseRelease(Robot.MOUSE_LEFT_BTN);
            }
        };

        Runnable popupHide = new Runnable() {
            @Override
            public void run() {
                popup.hide();
            }
        };

        // loop controller
        popup.setOnHidden( new EventHandler<WindowEvent>() {
            @Override
            public void handle(WindowEvent event) {
                        if(--cycles > 0) { // have more cycles to execute
                            if(cycles == MEASURE_CYCLES) { // reset accumulated latencies
                                System.out.println("Warming up completed");
                                summaryLatency = 0;
                            }
                            Platform.runLater(roboActions);

                        } else {
                           // stop execution
                            System.out.printf("AVERAGE LATENCY = %.2f ms\n",((double)summaryLatency / MEASURE_CYCLES / 1000000));
                            PerformanceTracker.releaseSceneTracker(popup.getScene());
                            Platform.exit();
                        }
            }
        });

        PerformanceTracker tracker;
        tracker = PerformanceTracker.getSceneTracker(popup.getScene());
        tracker.setOnRenderedFrameTask(new Runnable() {
            @Override
            public void run() {
                if (startTime != -1) {
                    long latency = System.nanoTime() - startTime;
                    summaryLatency += latency;
                    System.out.println("INSTANT LATENCY = " + latency / 1000000 + " ms");
                    startTime = -1;
                    Platform.runLater(popupHide);
                }
            }
        });

        // activity initiator
        PerformanceTracker.getSceneTracker(s).setOnRenderedFrameTask(new Runnable() {
            @Override
            public void run() {
                PerformanceTracker.releaseSceneTracker(s);
                Platform.runLater(roboActions);
            }
        });

        double x = stage.getX() + s.getX() + s.getWidth() / 2;
        double y = stage.getY() + s.getY() + s.getHeight() / 2;
        robot.mouseMove((int) x, (int) y);
        stage.show();

    }

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