import com.sun.javafx.perf.PerformanceTracker;
import java.util.ArrayList;
import java.util.List;
import javafx.animation.AnimationTimer;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.collections.*;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.stage.Stage;
import javafx.util.Duration;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author ekaterina.pavlova@oracle.com
 */
public class ListViewMemTest extends Application {

    enum TestMode {STATIC, DYNAMIC };
    static TestMode testMode = TestMode.STATIC;

    static double SCENE_WEIGHT = 400.0;
    static double SCENE_HEIGHT = 400.0;
    static int ROWS = 30;

    
    static ObservableList<String> staticListViewlData;
    public void initStaticListViewData() {
        staticListViewlData = FXCollections.observableArrayList();
        for (int row = 0; row < ROWS; row++) {
            staticListViewlData.add("Static row " + row);
        }
    }

    ObservableList<String> createListViewData(int iter) {
        ObservableList<String> listviewData = FXCollections.observableArrayList();

        for (int i=0; i<ROWS; i++) {
            listviewData.add("Dynamic row " + iters + "( " + i + " )");
        }

        return listviewData;
    }

    Stage stage;
    PerformanceTracker perfTracker;
    Group rootGroup;
    int iters=1;
    @Override public void start(Stage primaryStage) {
        stage = new Stage();

        rootGroup = new Group();
        Scene scene = new Scene(rootGroup, SCENE_WEIGHT, SCENE_HEIGHT);

        stage.setScene(scene);
        stage.sizeToScene();
        stage.show();

        perfTracker = PerformanceTracker.getSceneTracker(scene);

        Timeline fpsTimeline = new Timeline();
        fpsTimeline.setCycleCount(Timeline.INDEFINITE);
        KeyFrame fpsKeyFrame = new KeyFrame(new Duration(2000), new EventHandler<ActionEvent>() {
            @Override public void handle(ActionEvent e) {
                String fpsText = String.format("FPS: %.2f", perfTracker.getInstantFPS());
                System.out.println(fpsText);
            }
        });
        fpsTimeline.getKeyFrames().add(fpsKeyFrame);


        initStaticListViewData();
        
        AnimationTimer objectsAllocator = new AnimationTimer() {
            @Override
            public void handle(long l) {

                stage.setTitle("ListView " + iters);

                ListView listView;
                ObservableList<String> listviewData = staticListViewlData;

                if (testMode == TestMode.DYNAMIC) {
                    listviewData = createListViewData(iters);
                }

                rootGroup.getChildren().clear();
                listView = new ListView();
                listView.setPrefSize(150, 250);
                listView.setItems(listviewData);

                listView.setLayoutX(iters % (SCENE_WEIGHT - 150));
                rootGroup.getChildren().add(listView);

                if (iters % 100 == 0) {
                    System.out.println("Created " + iters + " ListView");
                }

                iters ++;
            }
        };
        fpsTimeline.play();
        objectsAllocator.start();
    }


    public static void main(String[] args) {
        for (int index = 0; index < args.length; index++) {
            String arg = args[index];

            if ("-mode".equals(arg)) {
                if (index+1 >= args.length) {
                    System.err.println("-mode option requires an argument");
                    System.exit(1);
                }
                try {
                    testMode = TestMode.valueOf(args[index+1].toUpperCase());
                } catch (IllegalArgumentException e) {
                    System.err.print("-mode option must be from {");
                    for (int i=0; i<TestMode.values().length; i++)
                        System.err.print(TestMode.values()[i].toString().toLowerCase() + " ");
                    System.err.println(")");

                    System.exit(1);
                }
                index++;
            }
        }

        System.out.println("Running in mode: " + testMode);
        Application.launch(ListViewMemTest.class, args);
    }
}