Examples with InputVerifier javax.swing.InputVerifier used on opensource projects

Example 11 with InputVerifier

use of javax.swing.InputVerifier in project org.alloytools.alloy by AlloyTools.

the class PreferencesDialog method mkEditor.

protected JPanel mkEditor(final IntPref pref) {
    final JTextField jtf = new JTextField(pref.get().toString());
    jtf.setInputVerifier(new InputVerifier() {

        @Override
        public boolean verify(JComponent input) {
            try {
                JTextField src = (JTextField) input;
                Integer.parseInt(src.getText());
                return true;
            } catch (NumberFormatException e) {
                return false;
            }
        }
    });
    jtf.addKeyListener(new KeyAdapter() {

        @Override
        public void keyTyped(KeyEvent e) {
            char c = e.getKeyChar();
            if (c < '0' || c > '9') {
                // ignore event
                e.consume();
            }
        }
    });
    jtf.getDocument().addDocumentListener(new DocumentListener() {

        @Override
        public void removeUpdate(DocumentEvent e) {
            updatePref();
        }

        @Override
        public void insertUpdate(DocumentEvent e) {
            updatePref();
        }

        @Override
        public void changedUpdate(DocumentEvent e) {
            updatePref();
        }

        private void updatePref() {
            String val = jtf.getText();
            try {
                pref.set(Integer.parseInt(val));
            } catch (NumberFormatException ex) {
            }
        }
    });
    return OurUtil.makeH(pref.title + ": ", jtf);
}