| /* |
| * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.swingset3.demos.textfield; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.util.*; |
| import java.util.List; |
| import javax.swing.*; |
| import javax.swing.border.LineBorder; |
| import javax.swing.event.DocumentEvent; |
| import javax.swing.event.DocumentListener; |
| |
| /** |
| * JHistoryTextField |
| * |
| * @author Pavel Porvatov |
| */ |
| public class JHistoryTextField extends JTextField { |
| |
| private static final int MAX_VISIBLE_ROWS = 8; |
| |
| private final List<String> history = new ArrayList<String>(); |
| |
| private final JPopupMenu popup = new JPopupMenu() { |
| @Override |
| public Dimension getPreferredSize() { |
| Dimension dimension = super.getPreferredSize(); |
| |
| dimension.width = JHistoryTextField.this.getWidth(); |
| |
| return dimension; |
| } |
| }; |
| |
| private final JList<String> list = new JList<>(new DefaultListModel<>()); |
| |
| private String userText; |
| |
| private boolean notificationDenied; |
| |
| public JHistoryTextField() { |
| JScrollPane scrollPane = new JScrollPane(list, |
| ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, |
| ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); |
| scrollPane.setHorizontalScrollBar(null); |
| scrollPane.setBorder(null); |
| |
| list.setFocusable(false); |
| |
| popup.add(scrollPane); |
| popup.setFocusable(false); |
| popup.setBorder(new LineBorder(Color.BLACK, 1)); |
| |
| getDocument().addDocumentListener(new DocumentListener() { |
| @Override |
| public void insertUpdate(DocumentEvent e) { |
| onTextChanged(); |
| } |
| |
| @Override |
| public void removeUpdate(DocumentEvent e) { |
| onTextChanged(); |
| } |
| |
| @Override |
| public void changedUpdate(DocumentEvent e) { |
| onTextChanged(); |
| } |
| }); |
| |
| list.addMouseMotionListener(new MouseAdapter() { |
| @Override |
| public void mouseMoved(MouseEvent e) { |
| int index = list.locationToIndex(e.getPoint()); |
| |
| if (index >= 0 && list.getSelectedIndex() != index) { |
| list.setSelectedIndex(index); |
| } |
| } |
| }); |
| |
| list.addMouseListener(new MouseAdapter() { |
| @Override |
| public void mouseReleased(MouseEvent e) { |
| if (SwingUtilities.isLeftMouseButton(e)) { |
| setTextWithoutNotification(list.getSelectedValue()); |
| |
| popup.setVisible(false); |
| } |
| } |
| }); |
| |
| addFocusListener(new FocusAdapter() { |
| @Override |
| public void focusLost(FocusEvent e) { |
| popup.setVisible(false); |
| } |
| }); |
| |
| addKeyListener(new KeyAdapter() { |
| @Override |
| public void keyPressed(KeyEvent e) { |
| if (popup.isShowing()) { |
| switch (e.getKeyCode()) { |
| case KeyEvent.VK_UP: { |
| changeListSelectedIndex(-1); |
| |
| break; |
| } |
| |
| case KeyEvent.VK_PAGE_UP: { |
| changeListSelectedIndex(-list.getVisibleRowCount()); |
| |
| break; |
| } |
| |
| case KeyEvent.VK_DOWN: { |
| changeListSelectedIndex(1); |
| |
| break; |
| } |
| |
| case KeyEvent.VK_PAGE_DOWN: { |
| changeListSelectedIndex(list.getVisibleRowCount()); |
| |
| break; |
| } |
| |
| case KeyEvent.VK_ESCAPE: { |
| popup.setVisible(false); |
| |
| setTextWithoutNotification(userText); |
| |
| break; |
| } |
| |
| case KeyEvent.VK_ENTER: |
| case KeyEvent.VK_LEFT: |
| case KeyEvent.VK_RIGHT: { |
| popup.setVisible(false); |
| |
| break; |
| } |
| } |
| } else if (e.getKeyCode() == KeyEvent.VK_DOWN |
| || e.getKeyCode() == KeyEvent.VK_UP |
| || e.getKeyCode() == KeyEvent.VK_PAGE_UP |
| || e.getKeyCode() == KeyEvent.VK_PAGE_DOWN) { |
| userText = getText(); |
| |
| showFilteredHistory(); |
| } |
| } |
| }); |
| } |
| |
| private void changeListSelectedIndex(int delta) { |
| int size = list.getModel().getSize(); |
| int index = list.getSelectedIndex(); |
| |
| int newIndex; |
| |
| if (index < 0) { |
| newIndex = delta > 0 ? 0 : size - 1; |
| } else { |
| newIndex = index + delta; |
| } |
| |
| if (newIndex >= size || newIndex < 0) { |
| newIndex = newIndex < 0 ? 0 : size - 1; |
| |
| if (index == newIndex) { |
| newIndex = -1; |
| } |
| } |
| |
| if (newIndex < 0) { |
| list.getSelectionModel().clearSelection(); |
| list.ensureIndexIsVisible(0); |
| |
| setTextWithoutNotification(userText); |
| } else { |
| list.setSelectedIndex(newIndex); |
| list.ensureIndexIsVisible(newIndex); |
| |
| setTextWithoutNotification(list.getSelectedValue()); |
| } |
| } |
| |
| private void setTextWithoutNotification(String text) { |
| notificationDenied = true; |
| |
| try { |
| setText(text); |
| } finally { |
| notificationDenied = false; |
| } |
| } |
| |
| private void onTextChanged() { |
| if (!notificationDenied) { |
| userText = getText(); |
| |
| showFilteredHistory(); |
| } |
| } |
| |
| private void showFilteredHistory() { |
| list.getSelectionModel().clearSelection(); |
| |
| DefaultListModel<String> model = (DefaultListModel<String>) list.getModel(); |
| |
| model.clear(); |
| |
| for (String s : history) { |
| if (s.contains(userText)) { |
| model.addElement(s); |
| } |
| } |
| |
| int size = model.size(); |
| |
| if (size == 0) { |
| popup.setVisible(false); |
| } else { |
| list.setVisibleRowCount(size < MAX_VISIBLE_ROWS ? size : MAX_VISIBLE_ROWS); |
| |
| popup.pack(); |
| |
| if (!popup.isShowing()) { |
| popup.show(JHistoryTextField.this, 0, getHeight()); |
| } |
| } |
| } |
| |
| public List<String> getHistory() { |
| return Collections.unmodifiableList(history); |
| } |
| |
| public void setHistory(List<? extends String> history) { |
| this.history.clear(); |
| this.history.addAll(history); |
| } |
| } |