Adds a static mask to the specified JavaFX text field. - Java JavaFX

Java examples for JavaFX:TextField

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Description

Adds a static mask to the specified JavaFX text field.

Demo Code


//package com.java2s;
import java.util.HashSet;
import java.util.Set;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;

public class Main {
    /**//from  www. j  ava  2s .com
     * Adds a static mask to the specified text field.
     *
     * @param tf the text field.
     * @param mask the mask to apply. Example of usage: addMask(txtDate, " / /
     * ");
     */
    public static void addMask(final TextField tf, final String mask) {
        tf.setText(mask);
        // addTextLimiter(tf, mask.length());

        tf.textProperty().addListener(new ChangeListener<String>() {
            @Override
            public void changed(final ObservableValue<? extends String> ov,
                    final String oldValue, final String newValue) {

            }
        });

        tf.setOnKeyPressed(new EventHandler<KeyEvent>() {
            @Override
            public void handle(final KeyEvent e) {
                int caretPosition = tf.getCaretPosition();
                String value = stripMask(tf.getText(), mask);
                tf.setText(merge(value, mask));
                if (caretPosition < mask.length() - 1
                        && mask.charAt(caretPosition) != ' '
                        && e.getCode() != KeyCode.BACK_SPACE
                        && e.getCode() != KeyCode.LEFT) {
                    tf.positionCaret(caretPosition + 1);
                } else {
                    tf.positionCaret(caretPosition);
                }
            }
        });
    }

    static String stripMask(String text, final String mask) {
        final Set<String> maskChars = new HashSet<>();
        for (int i = 0; i < mask.length(); i++) {
            char c = mask.charAt(i);
            if (c != ' ') {
                maskChars.add(String.valueOf(c));
            }
        }
        for (String c : maskChars) {
            text = text.replace(c, "");
        }
        return text;
    }

    static String merge(final String value, final String mask) {
        final StringBuilder sb = new StringBuilder(mask);
        System.out.println(value);
        int k = 0;
        for (int i = 0; i < mask.length(); i++) {
            if (mask.charAt(i) == ' ' && k < value.length()) {
                sb.setCharAt(i, value.charAt(k));
                k++;
            }
        }
        return sb.toString();
    }
}

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