AutoSavingDialog_30072018_MS.java

package de.gsi.cs.co.ap.my_test_project.utils;

import java.io.File;
import java.util.regex.Pattern;

import javafx.application.Platform;
import javafx.beans.binding.Bindings;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonBar;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Label;
import javafx.scene.control.Separator;
import javafx.scene.control.TextField;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;

// for library loggers
// import org.slf4j.Logger;
// import org.slf4j.LoggerFactory;

// for application loggers
// import de.gsi.cs.co.ap.common.gui.elements.logger.AppLogger;

/**
 * @author fschirru
 */
public class AutoSavingDialog {

    // You can choose a logger (needed imports are given in the import section as comments):
    // for libraries:
    // private static final Logger LOGGER = LoggerFactory.getLogger(AutoSavingDialog.class);
    // for applications:
    // private static final AppLogger LOGGER = AppLogger.getLogger();

    Stage autoSavingDialogStage;

    private boolean destination_directory_isSelected;
    private boolean isAutoSavingON_;

    private final IntegerProperty destinationDirectoryIsSelected = new SimpleIntegerProperty();
    private final IntegerProperty isAutoSavingON = new SimpleIntegerProperty();

    final private Pattern validDoubleText = Pattern.compile("([1-9][0-9]{0,2})?$");

    private String selected_directory;

    private final TextField path_tf;
    private final TextField savingFreq_tf;

    private final Button path_apply_bt;
    private final Button path_stop_bt;
    private final Button path_exit_bt;

    private final Separator hSeparator = new Separator();

    private int savingFileFreq;

    private static final AutoSavingDialog INSTANCE = new AutoSavingDialog();

    public static AutoSavingDialog getInstance() {

        return INSTANCE;
    }

    /**
     *
     */
    public AutoSavingDialog() {

        savingFreq_tf = new TextField();
        path_tf = new TextField();

        hSeparator.setStyle("-fx-border-style: solid; -fx-border-width: 0.1px;");

        autoSavingDialogStage = new Stage();
        autoSavingDialogStage.setTitle("Save [AUTO]");
        autoSavingDialogStage.setResizable(false);
        autoSavingDialogStage.initModality(Modality.APPLICATION_MODAL);
        final Group root = new Group();
        final Scene scene = new Scene(root);
        autoSavingDialogStage.setScene(scene);
        final GridPane gridpane = new GridPane();
        // gridpane.setPadding(new Insets(5));
        gridpane.setHgap(10);
        gridpane.setVgap(10);

        final Label path_lb = new Label("Path: ");
        gridpane.add(path_lb, 0, 1);

        final Label savingFreq_lb = new Label("Frequency (min): ");
        gridpane.add(savingFreq_lb, 0, 2);

        // final TextField path_tf = new TextField("");
        path_tf.setPrefWidth(500);
        gridpane.add(path_tf, 1, 1);

        /*
         * savingFreq_tf.textProperty().addListener((observable, oldValue, newValue) -> {
         * if (!newValue.matches("\\([1-9][0-9]{0,3})?$")) {
         * savingFreq_tf.setText(newValue.replaceAll("^\\[1-9][0-9]{0,3}", ""));
         * }
         * });
         */

        savingFreq_tf.textProperty().addListener((observable, oldValue, newValue) -> {
            if (!newValue.matches(validDoubleText.toString())) {

                savingFreq_tf.setText(oldValue);
            }
        });
        savingFreq_tf.setMaxWidth(50);
        gridpane.add(savingFreq_tf, 1, 2);

        final VBox vBox = new VBox();
        vBox.setSpacing(15);
        vBox.setPadding(new Insets(10, 10, 10, 10));

        final ButtonBar button_bar = new ButtonBar();

        path_apply_bt = new Button("Start");
        path_apply_bt.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(final ActionEvent event) {

                final File file = new File(path_tf.getText());

                final boolean exists = file.exists();

                if (exists) {
                    // It returns true if File or directory does exist

                    destinationDirectoryIsSelected.set(1);
                    destination_directory_isSelected = true;
                    isAutoSavingON.set(1);
                    isAutoSavingON_ = true;
                    setSelectedDirectory(path_tf.getText());
                    setSavingFileFreq(Integer.parseInt(savingFreq_tf.getText()));

                    // selected_directory = path_tf.getText();
                    // startDataRecording();
                    autoSavingDialogStage.close();

                } else {

                    destination_directory_isSelected = false;
                    destinationDirectoryIsSelected.set(0);
                    isAutoSavingON_ = false;
                    isAutoSavingON.set(0);
                    // autoSavingDialogStage.close();

                    final Alert alert = new Alert(AlertType.ERROR, "The directory selected does not exists!",
                            ButtonType.CANCEL);
                    alert.showAndWait();

                    if (alert.getResult() == ButtonType.CANCEL) {

                        // autoSavingDialogStage.close();
                        // path_tf.clear();
                        path_tf.setText("/home/rifr/scheidenb/lnx/fmgstat");
                        alert.close();
                    }
                }
            }
        });

        // path_apply_bt.disableProperty().bind(Bindings.isEmpty(path_tf.textProperty()));

        path_stop_bt = new Button("Stop");
        path_stop_bt.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(final ActionEvent event) {

                isAutoSavingON_ = false;
                isAutoSavingON.set(0);

                autoSavingDialogStage.close();

            }
        });

        path_exit_bt = new Button("Close");
        path_exit_bt.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(final ActionEvent event) {

                autoSavingDialogStage.close();

                // destination_directory_isSelected = false;
                // setSelectedDirectory(null);

            }
        });

        Platform.runLater(() -> path_exit_bt.requestFocus());

        button_bar.getButtons().addAll(path_apply_bt, path_stop_bt, path_exit_bt);
        button_bar.setPadding(new Insets(0, 0, 0, 0));

        vBox.getChildren().addAll(gridpane, hSeparator, button_bar);

        root.getChildren().add(vBox);

        path_apply_bt.disableProperty().bind(Bindings.isEmpty(path_tf.textProperty()).or(isAutoSavingON.isEqualTo(1)));
        path_stop_bt.disableProperty().bind(isAutoSavingON.isEqualTo(0));

        Platform.runLater(() -> path_exit_bt.requestFocus());

    }

    public Stage getAutoSavingDialogStage() {

        return autoSavingDialogStage;
    }

    public boolean getDestination_directory_isSelected() {

        return destination_directory_isSelected;
    }

    public boolean getIsAutoSavingON() {

        return isAutoSavingON_;
    }

    private void setSelectedDirectory(final String selectedDirectory) {

        selected_directory = selectedDirectory;
    }

    public String getSelectedDirectory() {

        return selected_directory;
    }

    private int setSavingFileFreq(final int savingFileFreq) {

        this.savingFileFreq = savingFileFreq;

        return savingFileFreq;
    }

    public int getSavingFileFreq() {

        savingFileFreq = Integer.parseInt(savingFreq_tf.getText()) * 60000; // in milleseconds

        return savingFileFreq;
    }

    public void setData() {

        // destination_directory_isSelected = false;
        // path_tf.clear();
        path_tf.setText("/home/rifr/scheidenb/lnx/fmgstat");
        savingFreq_tf.setText("1");

        // this function is needed because till the stage is not shown we can not focus a node!
        // All the request focus invoked before showing the scene are not considered. By the constructor it will be
        // considered the first node by default
        // The following line makes the trick to focus on the desired node! :D

        Platform.runLater(() -> path_exit_bt.requestFocus());
    }

    public boolean retrieveDestinationDirectoryisSelected() {

        return destination_directory_isSelected;
    }

    public IntegerProperty getDestinationDirectoryIsSelectedProperty() {

        return destinationDirectoryIsSelected;
    }

    public IntegerProperty getIsAutoSavingOnProperty() {

        return isAutoSavingON;
    }
}