126 lines
4.1 KiB
Java
126 lines
4.1 KiB
Java
package me.teridax.jcash.gui.login;
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import javax.swing.*;
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import javax.swing.text.*;
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import java.awt.*;
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import java.text.NumberFormat;
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import static java.awt.BorderLayout.NORTH;
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import static javax.swing.SwingConstants.CENTER;
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import static me.teridax.jcash.lang.Translator.translate;
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public class LoginView extends JPanel {
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/**
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* Maximum number of decimal digits that can be stored lossless by a 32-bit signed integer.
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* N = log10(2^32-1) = 9,632959861146281
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*/
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private static final int MAX_PIN_DECIMAL_DIGITS = 9;
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private JFormattedTextField blz;
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private JFormattedTextField iban;
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private JPasswordField pin;
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private JButton login;
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public LoginView() {
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createComponents();
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layoutComponents();
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}
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private void layoutComponents() {
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var content = new JPanel(new GridBagLayout());
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this.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
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this.setLayout(new BorderLayout(16, 16));
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this.add(new JScrollPane(content), BorderLayout.CENTER);
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this.add(new JLabel("<html><h1>" + translate("Cashmachine") + "</b></html>", CENTER), NORTH);
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var constraints = new GridBagConstraints();
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constraints.gridwidth = 4;
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constraints.insets = new Insets(12, 12, 12, 12);
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addInputRow(constraints, content, blz, 1, translate("BLZ"));
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addInputRow(constraints, content, iban, 2, translate("IBAN"));
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addInputRow(constraints, content, pin, 3, translate("PIN"));
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constraints.gridy = 4;
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constraints.anchor = GridBagConstraints.PAGE_END;
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constraints.weightx = 0;
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constraints.fill = GridBagConstraints.NONE;
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constraints.insets = new Insets(12, 12, 12, 12);
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content.add(login, constraints);
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}
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private void createComponents() {
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this.blz = new JFormattedTextField();
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this.iban = new JFormattedTextField(getNumberFormat());
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this.pin = new JPasswordField();
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this.login = new JButton(translate("Login"));
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restrictPasswordToDigits();
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}
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/**
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* Adds a document filter onto {@link #pin} that filters out everything that is not a digit.
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* The filter also restricts the amount of digits that can be entered to {@link #MAX_PIN_DECIMAL_DIGITS}
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*/
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private void restrictPasswordToDigits() {
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((AbstractDocument) this.pin.getDocument()).setDocumentFilter(new DocumentFilter() {
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@Override
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public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs)
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throws BadLocationException {
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String newText = fb.getDocument().getText(0, fb.getDocument().getLength()) + text;
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if (newText.matches(String.format("\\d{1,%s}", MAX_PIN_DECIMAL_DIGITS))) {
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super.replace(fb, offset, length, text, attrs);
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}
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}
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});
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}
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private NumberFormatter getNumberFormat() {
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var format = NumberFormat.getIntegerInstance();
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format.setGroupingUsed(false);
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var formatter = new NumberFormatter(format);
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formatter.setValueClass(Integer.class);
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formatter.setMinimum(0);
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formatter.setMaximum(Integer.MAX_VALUE);
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formatter.setAllowsInvalid(false);
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return formatter;
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}
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private void addInputRow(GridBagConstraints constraints, JComponent target, JComponent comp, int row, String name) {
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constraints.gridwidth = 1;
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constraints.gridx = 1;
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constraints.gridy = row;
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constraints.weightx = 0;
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constraints.fill = GridBagConstraints.HORIZONTAL;
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target.add(new JLabel(name, SwingConstants.RIGHT), constraints);
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constraints.gridx = 2;
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constraints.gridy = row;
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constraints.weightx = 1;
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constraints.fill = GridBagConstraints.HORIZONTAL;
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target.add(comp, constraints);
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}
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public JTextField getBlz() {
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return blz;
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}
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public JTextField getIban() {
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return iban;
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}
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public JPasswordField getPin() {
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return pin;
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}
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public JButton getLogin() {
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return login;
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}
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}
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