void decreaseVolume() {
    if (player == null) return;
    double newVolume = Settings.currentVolume - 0.05;

    if (newVolume < 0.0) newVolume = 0.0;
    Settings.currentVolume = newVolume;
    player.setVolume(newVolume);
    volumeSlider.setValue(newVolume);
  }
  @Override
  public void initialize(URL location, ResourceBundle resources) {
    AppController.instance = this;
    this.res = resources;

    ObservableList<String> modeItems =
        FXCollections.observableArrayList(
            Settings.MODE_NEXT, Settings.MODE_RANDOM, Settings.MODE_SAME);
    modeList.setItems(modeItems);
    modeList.getSelectionModel().select(Settings.currentMode);
    modeList
        .valueProperty()
        .addListener(
            (ObservableValue ov, Object oldVal, Object newVal) -> {
              Settings.currentMode = (String) newVal;
            });

    setupPlaylistsView();
    setupPlaylistsContextMenu();

    setupTracksView();

    tracksView.setContextMenu(tracksContextMenu);
    tracksView.setOnContextMenuRequested(
        (ContextMenuEvent evt) -> {
          setupTracksContextMenu();
          evt.consume();
        });
    tracksView
        .getSelectionModel()
        .selectedItemProperty()
        .addListener(
            (ObservableValue observable, Object oldValue, Object newValue) -> {
              Settings.lastTrackId = newValue != null ? ((Track) newValue).getId() : null;
            });

    playlistsView
        .getSelectionModel()
        .selectedItemProperty()
        .addListener(
            (ObservableValue observable, Object oldValue, Object newValue) -> {
              loadSelectedPlaylist();
              Settings.lastPlaylistId = newValue != null ? ((Playlist) newValue).getId() : null;
              searching = false;
              searchText.setText(StringUtils.EMPTY);
            });

    volumeSlider.setCursor(Cursor.HAND);
    volumeSlider
        .valueProperty()
        .addListener(
            (ObservableValue<? extends Number> ov, Number oldVal, Number newVal) -> {
              if (player != null) {
                player.setVolume(newVal.doubleValue());
              }
              Settings.currentVolume = newVal.doubleValue();
              volumeLabel.setText(
                  String.valueOf((int) Math.ceil(newVal.doubleValue() * 100)) + "%");
            });
    volumeSlider.setValue(Settings.currentVolume);

    imagePlay = new ImageView(new Image(getClass().getResourceAsStream("/images/button_play.png")));
    imagePlay.setScaleX(0.40);
    imagePlay.setScaleY(0.40);
    imagePause =
        new ImageView(new Image(getClass().getResourceAsStream("/images/button_pause.png")));
    imagePause.setScaleX(0.5);
    imagePause.setScaleY(0.5);
    imageSettings =
        new ImageView(new Image(getClass().getResourceAsStream("/images/settings.png")));
    imageSettings.setScaleX(0.5);
    imageSettings.setScaleY(0.5);
    imageUpdate = new ImageView(new Image(getClass().getResourceAsStream("/images/refresh.png")));
    imageUpdate.setScaleX(0.5);
    imageUpdate.setScaleY(0.5);
    imageAdd = new ImageView(new Image(getClass().getResourceAsStream("/images/add.png")));
    imageAdd.setScaleX(0.5);
    imageAdd.setScaleY(0.5);
    imageRename = new ImageView(new Image(getClass().getResourceAsStream("/images/rename.png")));
    imageRename.setScaleX(0.5);
    imageRename.setScaleY(0.5);
    imageDelete = new ImageView(new Image(getClass().getResourceAsStream("/images/delete.png")));
    imageDelete.setScaleX(0.5);
    imageDelete.setScaleY(0.5);

    stateButton.setGraphic(imagePlay);
    settingsButton.setGraphic(imageSettings);
    refreshButton.setGraphic(imageUpdate);
    refreshButton.setTooltip(new Tooltip(res.getString("tooltip_sync")));

    addButton.setGraphic(imageAdd);
    addButton.setOnAction((evt) -> createOfflinePlaylist());
    addButton.setTooltip(new Tooltip(res.getString("tooltip_add_offline")));
    renameButton.setGraphic(imageRename);
    renameButton.setOnAction(evt -> renamePlaylist());
    renameButton.setTooltip(new Tooltip(res.getString("rename_playlist")));
    deleteButton.setGraphic(imageDelete);
    deleteButton.setOnAction(evt -> deletePlaylist());
    deleteButton.setTooltip(new Tooltip(res.getString("delete_playlist")));

    loadProgressBar.setCursor(Cursor.HAND);
    volumeSlider.setCursor(Cursor.HAND);
    updatePlaylists();
    if (Settings.lastPlaylistId != null) {
      currentPlaylist =
          ((ObservableList<Playlist>) playlistsView.getItems())
              .stream()
              .filter((playlist) -> playlist.getId().equals(Settings.lastPlaylistId))
              .findFirst()
              .orElse(null);
      playlistsView.getSelectionModel().select(currentPlaylist);
      playlistsView.scrollTo(currentPlaylist);
      Platform.runLater(
          () -> {
            if (Settings.lastTrackId != null) {
              currentTrack =
                  ((ObservableList<Track>) tracksView.getItems())
                      .stream()
                      .filter((track) -> track.getId().equals(Settings.lastTrackId))
                      .findFirst()
                      .orElse(null);
              tracksView.getSelectionModel().select(currentTrack);
              tracksView.scrollTo(currentTrack);
            }
          });
    }
    new Timer()
        .scheduleAtFixedRate(
            new TimerTask() {
              @Override
              public void run() {
                updatePlayProgress();
              }
            },
            100,
            100);
    setupTracksContextMenu();

    setupShortcuts();

    Platform.runLater(
        () -> {
          tracksView.requestFocus();
        });
  }