CalculateController.java

package wf.view;

import java.util.regex.Pattern;

import javafx.beans.binding.Bindings;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonBar;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.control.Separator;
import javafx.scene.control.TextField;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import wf.Main;
import wf.util.CalculateTask;
import wf.util.DataHistoHandler;
import wf.util.RetrieveDateAndTime;

public class CalculateController {

	@FXML private AnchorPane calculate_ap;
	@FXML private AnchorPane bottom_ap;
	@FXML private AnchorPane top_ap;
	@FXML private Button apply_bt;
	@FXML private Button close_bt;
	@FXML private ButtonBar bar_bb;
	//@FXML private ComboBox<String> smoothingPoints_cb;
	@FXML private GridPane grid_gr;
	@FXML private Label title_lb;
	@FXML private Label progressBar_lb;
	@FXML private Label peakFinderParam1_lb;
	@FXML private Label peakFinderParam2_lb;
	@FXML private ProgressBar progressBar_pb;
	@FXML private Separator north_sp;
	@FXML private Separator south_sp;
	@FXML private TextField peakFinderParam1_tf;
	@FXML private TextField peakFinderParam2_tf;
	@FXML private VBox calculate_vb;

	private final String WORK_DONE_LABEL_FORMAT = "%.1f";

	private final Pattern int_pt = Pattern.compile("\\d{0,3}?$");
	private final Pattern num_pt = Pattern.compile("\\d{0,3}(\\.\\d{0,3})?$");

	private static CalculateTask calculateTask = CalculateTask.getInstance();
	private static DataHistoHandler dataHistoHandler = DataHistoHandler.getInstance();

	private BooleanProperty calculationStarted = new SimpleBooleanProperty(false);

	//private int maxNumberOfSeries; //max of the series regardless of the channel
	private int totalNumberOfSeries;

	@FXML
	public void initialize() {

		initStyle();
		initTextFieldListeners();
		bindingApplyButton();

		peakFinderParam1_lb.setPrefWidth(140);
		peakFinderParam2_lb.setPrefWidth(140);

		peakFinderParam1_tf.setMaxWidth(120);
		peakFinderParam2_tf.setMaxWidth(120);

		progressBar_pb.setMaxWidth(Double.MAX_VALUE); // allows the progress bar to expand to fill available horizontal space.
		progressBar_pb.setProgress(0.0);
	}

	@FXML
	private void exitAction() {

		progressBar_lb.textProperty().unbind();
		progressBar_pb.progressProperty().unbind();
		calculate_ap.getScene().getWindow().hide();
	}

	@FXML
	private void applyAction() {

		close_bt.setDisable(true);

		calculationStarted.setValue(true);

		totalNumberOfSeries = dataHistoHandler.getTotalNumberOfSeries();

		//perform calculation
		progressBar_pb.progressProperty().bind(CalculateTask.getInstance().progressProperty());

		progressBar_lb.textProperty().bind(

				Bindings.format("Calculation started... " + WORK_DONE_LABEL_FORMAT + " %%",
				CalculateTask.getInstance().progressProperty().multiply((double)100))
		);


		//Start task (calculation waveform parameters)
		// Get the loading Task
        final Task<Void> task = calculateTask.performCalculation(Integer.parseInt(peakFinderParam1_tf.getText()),
        		Double.parseDouble(peakFinderParam2_tf.getText()), totalNumberOfSeries);

        // Catch any exceptions
        task.setOnFailed(wse -> {

       	 System.out.println("Error");
            task.getException().printStackTrace();
            dataHistoHandler.setDataCalculated(0);
        });

        // Print success when complete
        task.setOnSucceeded(wse -> {

        	close_bt.setDisable(false);
        	calculationStarted.setValue(false);
        	resultMessage();
        	dataHistoHandler.setDataCalculated(1);
        });

        new Thread(task).start();
	}

	private void bindingApplyButton() {

		apply_bt.disableProperty().bind(((peakFinderParam1_tf.textProperty().isEmpty()
				.or(peakFinderParam2_tf.textProperty().isEmpty()))).or(calculationStarted)
				.or((peakFinderParam1_tf.textProperty().isEqualTo("0")
						.or(peakFinderParam2_tf.textProperty().isEqualTo("0")))));
	}

	private void initTextFieldListeners() {

		 peakFinderParam1_tf.textProperty().addListener((observable, oldValue, newValue) -> {

			 if (!newValue.matches(int_pt.toString())) {

				 peakFinderParam1_tf.setText(oldValue);
			 }

			 if(newValue.length() > 1 && newValue.subSequence(0, 1).equals("0")
					 && newValue.subSequence(1, 2).equals("0")) {

				 peakFinderParam1_tf.setText(oldValue);
			 }

			 if(newValue.length() > 0 && newValue.subSequence(0, 1).equals("0")) {

				 peakFinderParam1_tf.setText(oldValue);
			 }
			 /*
			 if(newValue.length() == 1 && newValue.subSequence(0, 1).equals(".")) {

				 peakFinderParam1_tf.setText(oldValue);
			 }

			 if(newValue.length() > 1 && newValue.subSequence(0, 1).equals("0")
					 && newValue.subSequence(1, 2).equals("0")) {

				 peakFinderParam1_tf.setText(oldValue);
			 }*/
		 });

		 peakFinderParam2_tf.textProperty().addListener((observable, oldValue, newValue) -> {

			 if (!newValue.matches(num_pt.toString())) {

				 peakFinderParam2_tf.setText(oldValue);
			 }

			 if(newValue.length() == 1 && newValue.subSequence(0, 1).equals(".")) {

				 peakFinderParam2_tf.setText(oldValue);
			 }

			 if(newValue.length() > 1 && newValue.subSequence(0, 1).equals("0")
					 && newValue.subSequence(1, 2).equals("0")) {

				 peakFinderParam2_tf.setText(oldValue);
			 }
		 });
	}

	public void reset() {

		progressBar_lb.setText("Calculation: not started");
		peakFinderParam1_tf.setText("");
		peakFinderParam2_tf.setText("");

		progressBar_pb.setProgress(0);
	}

	private void resultMessage() {

		Main.updateTextArea("\n" + RetrieveDateAndTime.getDateAndTime()
		+ " - Calculation performed with [" + peakFinderParam1_tf.getText() +"] points");
		Main.updateTextArea("\n" + RetrieveDateAndTime.getDateAndTime()
		+ " - Calculation performed with [" + peakFinderParam2_tf.getText() +"] threshold value" );
	}

	private void initStyle() {

		calculate_vb.setStyle(" -fx-background-color: FloralWhite;");

		apply_bt.setId("button_bevel-grey");
		close_bt.setId("button_bevel-grey");

		title_lb.setId("appTitle");
		progressBar_lb.setId("labelDecoratedNoBkG");
		peakFinderParam1_lb.setId("labelDecoratedNoBkG");
		peakFinderParam2_lb.setId("labelDecoratedNoBkG");

		top_ap.setId("topLayoutContainer");
		bottom_ap.setId("bottomLayoutContainer");
		calculate_ap.setId("appBackground");

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

		peakFinderParam1_tf.setId("textField2");
		peakFinderParam2_tf.setId("textField2");
	}
}