ListView.java 文件源码

private void setupSearch() {
    // Remove the default key listeners
    KeyListener[] keyListeners = getListeners(KeyListener.class);

    for (int i = 0; i < keyListeners.length; i++) {
        removeKeyListener(keyListeners[i]);
    }

    // Add new key listeners
    addKeyListener(
        new KeyAdapter() {
        @Override
            public void keyPressed(KeyEvent e) {
                int modifiers = e.getModifiers();
                int keyCode = e.getKeyCode();

                if (((modifiers > 0) && (modifiers != KeyEvent.SHIFT_MASK)) || e.isActionKey()) {
                    return;
                }

                char c = e.getKeyChar();

                if (!Character.isISOControl(c) && (keyCode != KeyEvent.VK_SHIFT)) {
                    searchTextField.setText(String.valueOf(c));
                    displaySearchField();
                }
            }
        }
    );

    // Create a the "multi-event" listener for the text field. Instead of
    // adding separate instances of each needed listener, we're using a
    // class which implements them all. This approach is used in order
    // to avoid the creation of 4 instances which takes some time
    SearchFieldListener searchFieldListener = new SearchFieldListener();
    searchTextField.addKeyListener(searchFieldListener);
    searchTextField.addFocusListener(searchFieldListener);
    searchTextField.getDocument().addDocumentListener(searchFieldListener);
}