JavaFXUtil Class, stuff you might need in a JavaFX8 GUI

JavaFXUtils

package javaFxUtils;


import java.io.PrintWriter;
import java.io.StringWriter;

import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.control.TableView;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;

// TODO: Auto-generated Javadoc
/**
 * The Class JavaFxUtils.
 */
public class JavaFxUtils {

  /**
   * Adds automatic scrolling to last index in a table.
   *
   * @param <S> the generic type
   * @param view the view
   */
  public static <S> void addAutoScrollToTableView(final TableView<S> view) {
    if (view == null) {
      throw new NullPointerException();
    }

    view.getItems().addListener((ListChangeListener<S>) (c ->
      {
        c.next();
        final int size = view.getItems().size();
        if (size > 0) {
          view.scrollTo(size - 1);
        }
      }));
  }


  /**
   * Adds the filter_ windows explorer conform.
   *
   * @param field the field
   */
  public static void addFilter_WindowsExplorerConform(TextField field) {
    field.addEventFilter(KeyEvent.ANY, keyEvent ->
      {
        if (!keyEvent.getCharacter().matches("^[a-zA-Z0-9_]*$") && !keyEvent.getCode().equals(KeyCode.BACK_SPACE)) {
          keyEvent.consume();
        }
      });
  }

  /**
   * Adds the filter_ only numbers.
   *
   * @param field the field
   */
  public static void addFilter_OnlyNumbers(TextField field) {
    field.addEventFilter(KeyEvent.ANY, keyEvent ->
      {
        if (!keyEvent.getCharacter().matches("^[0-9]*$") && !keyEvent.getCode().equals(KeyCode.BACK_SPACE)) {
          keyEvent.consume();
        }
      });
  }

  /**
   * Adds the filter_ only alphanumeric.
   *
   * @param field the field
   */
  public static void addFilter_OnlyAlphanumeric(TextField field) {
    field.addEventFilter(KeyEvent.ANY, keyEvent ->
      {
        if (!keyEvent.getCharacter().matches("^[\\p{L}0-9]*$") && !keyEvent.getCode().equals(KeyCode.BACK_SPACE)) {
          keyEvent.consume();
        }
      });
  }

  /**
   * Adds the filter_ only alphabet.
   *
   * @param field the field
   */
  public static void addFilter_OnlyAlphabet(TextField field) {
    field.addEventFilter(KeyEvent.ANY, keyEvent ->
      {
        if (!keyEvent.getCharacter().matches("\\A[^\\W\\d_]+\\z") && !keyEvent.getCode().equals(KeyCode.BACK_SPACE)) {
          keyEvent.consume();
        }
      });
  }


  /**
   * Force list refresh on.
   *
   * @param <T> the generic type
   * @param lsv the lsv
   */
  public static <T> void forceListRefreshOn(ListView<T> lsv) {
    ObservableList<T> items = lsv.<T>getItems();
    lsv.<T>setItems(null);
    lsv.<T>setItems(items);
  }

  /**
   * Force table view refresh on.
   *
   * @param <T> the generic type
   * @param tbv the tbv
   */
  public static <T> void forceTableViewRefreshOn(TableView<T> tbv) {
    ObservableList<T> items = tbv.<T>getItems();
    tbv.<T>setItems(null);
    tbv.<T>setItems(items);
  }


  /**
   * Creates the error alert.
   *
   * @param e the error
   * @param contentText the content text
   */
  public static void createErrorAlert(Exception e, String contentText) {
    Alert alert = new Alert(AlertType.ERROR);
    alert.setTitle("Exception caught");
    alert.setHeaderText("There was an Error");
    alert.setContentText(contentText);

    // Create expandable Exception.
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    e.printStackTrace(pw);
    String exceptionText = sw.toString();

    Label label = new Label("The exception stacktrace was:");

    TextArea textArea = new TextArea(exceptionText);
    textArea.setEditable(false);
    textArea.setWrapText(true);

    textArea.setMaxWidth(Double.MAX_VALUE);
    textArea.setMaxHeight(Double.MAX_VALUE);
    GridPane.setVgrow(textArea, Priority.ALWAYS);
    GridPane.setHgrow(textArea, Priority.ALWAYS);

    GridPane expContent = new GridPane();
    expContent.setMaxWidth(Double.MAX_VALUE);
    expContent.add(label, 0, 0);
    expContent.add(textArea, 0, 1);

    // Set expandable Exception into the dialog pane.
    alert.getDialogPane().setExpandableContent(expContent);

    alert.showAndWait();
  }


  /**
   * Creates the textbox alert.
   *
   * @param title the title
   * @param header the header
   * @param contentText the content text
   * @param textbox the textbox
   */
  public static void createTextboxAlert(String title, String header, String contentText, String textbox) {
    Alert alert = new Alert(AlertType.INFORMATION);
    alert.setTitle(title);
    alert.setHeaderText(header);
    alert.setContentText(contentText);

    TextArea textArea = new TextArea(textbox);
    textArea.setEditable(false);
    textArea.setWrapText(true);

    textArea.setMaxWidth(Double.MAX_VALUE);
    textArea.setMaxHeight(Double.MAX_VALUE);
    GridPane.setVgrow(textArea, Priority.ALWAYS);
    GridPane.setHgrow(textArea, Priority.ALWAYS);

    GridPane expContent = new GridPane();
    expContent.setMaxWidth(Double.MAX_VALUE);
    expContent.add(textArea, 0, 0);

    // Set expandable Exception into the dialog pane.
    alert.getDialogPane().setExpandableContent(expContent);

    alert.showAndWait();
  }

/**
	 * Creates an alert.
	 *
	 * @param title       the title
	 * @param header      the header
	 * @param contentText the content text
	 */
	public static void createAlert(String title, String header, String contentText) {
		Alert alert = new Alert(AlertType.INFORMATION);
		alert.setTitle(title);
		alert.setHeaderText(header);
		alert.setContentText(contentText);
		alert.showAndWait();
	}

  /**
   * Creates the error alert j unit.
   *
   * @param exception the exception
   * @param contentText the content text
   */
  public static void createErrorAlertJUnit(Throwable exception, String contentText) {
    Alert alert = new Alert(AlertType.ERROR);
    alert.setTitle("Test failed");
    alert.setHeaderText("This test failed, further details below.");
    alert.setContentText(contentText);

    // Create expandable Exception.
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    exception.printStackTrace(pw);
    String exceptionText = sw.toString();

    Label label = new Label("The exception stacktrace was:");

    TextArea textArea = new TextArea(exceptionText);
    textArea.setEditable(false);
    textArea.setWrapText(true);

    textArea.setMaxWidth(Double.MAX_VALUE);
    textArea.setMaxHeight(Double.MAX_VALUE);
    GridPane.setVgrow(textArea, Priority.ALWAYS);
    GridPane.setHgrow(textArea, Priority.ALWAYS);

    GridPane expContent = new GridPane();
    expContent.setMaxWidth(Double.MAX_VALUE);
    expContent.add(label, 0, 0);
    expContent.add(textArea, 0, 1);

    // Set expandable Exception into the dialog pane.
    alert.getDialogPane().setExpandableContent(expContent);
    alert.showAndWait();
  }
}