| /* |
| * Copyright (c) 2011, 2013, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 sun.lwawt; |
| |
| import java.awt.*; |
| import java.awt.event.ItemEvent; |
| import java.awt.event.ItemListener; |
| import java.awt.peer.ChoicePeer; |
| |
| import javax.accessibility.Accessible; |
| import javax.swing.*; |
| |
| /** |
| * Lightweight implementation of {@link ChoicePeer}. Delegates most of the work |
| * to the {@link JComboBox}. |
| */ |
| final class LWChoicePeer extends LWComponentPeer<Choice, JComboBox<String>> |
| implements ChoicePeer, ItemListener { |
| |
| /** |
| * According to Choice specification item events are sent in response to |
| * user input, but not in response to calls to select(). But JComboBox are |
| * sent item events in both cases. Should be used under delegateLock. |
| */ |
| private boolean skipPostMessage; |
| |
| LWChoicePeer(final Choice target, |
| final PlatformComponent platformComponent) { |
| super(target, platformComponent); |
| } |
| |
| @Override |
| JComboBox<String> createDelegate() { |
| return new JComboBoxDelegate(); |
| } |
| |
| @Override |
| void initializeImpl() { |
| super.initializeImpl(); |
| final Choice choice = getTarget(); |
| final JComboBox<String> combo = getDelegate(); |
| synchronized (getDelegateLock()) { |
| final int count = choice.getItemCount(); |
| for (int i = 0; i < count; ++i) { |
| combo.addItem(choice.getItem(i)); |
| } |
| select(choice.getSelectedIndex()); |
| |
| // NOTE: the listener must be added at the very end, otherwise it |
| // fires events upon initialization of the combo box. |
| combo.addItemListener(this); |
| } |
| } |
| |
| @Override |
| public void itemStateChanged(final ItemEvent e) { |
| // AWT Choice sends SELECTED event only whereas JComboBox |
| // sends both SELECTED and DESELECTED. |
| if (e.getStateChange() == ItemEvent.SELECTED) { |
| synchronized (getDelegateLock()) { |
| if (skipPostMessage) { |
| return; |
| } |
| getTarget().select(getDelegate().getSelectedIndex()); |
| } |
| postEvent(new ItemEvent(getTarget(), ItemEvent.ITEM_STATE_CHANGED, |
| e.getItem(), ItemEvent.SELECTED)); |
| } |
| } |
| |
| @Override |
| public void add(final String item, final int index) { |
| synchronized (getDelegateLock()) { |
| getDelegate().insertItemAt(item, index); |
| } |
| } |
| |
| @Override |
| public void remove(final int index) { |
| synchronized (getDelegateLock()) { |
| // We shouldn't post event, if selected item was removed. |
| skipPostMessage = true; |
| getDelegate().removeItemAt(index); |
| skipPostMessage = false; |
| } |
| } |
| |
| @Override |
| public void removeAll() { |
| synchronized (getDelegateLock()) { |
| getDelegate().removeAllItems(); |
| } |
| } |
| |
| @Override |
| public void select(final int index) { |
| synchronized (getDelegateLock()) { |
| if (index != getDelegate().getSelectedIndex()) { |
| skipPostMessage = true; |
| getDelegate().setSelectedIndex(index); |
| skipPostMessage = false; |
| } |
| } |
| } |
| |
| @Override |
| public boolean isFocusable() { |
| return true; |
| } |
| |
| @SuppressWarnings("serial")// Safe: outer class is non-serializable. |
| private final class JComboBoxDelegate extends JComboBox<String> { |
| |
| // Empty non private constructor was added because access to this |
| // class shouldn't be emulated by a synthetic accessor method. |
| JComboBoxDelegate() { |
| super(); |
| } |
| |
| @Override |
| public boolean hasFocus() { |
| return getTarget().hasFocus(); |
| } |
| |
| //Needed for proper popup menu location |
| @Override |
| public Point getLocationOnScreen() { |
| return LWChoicePeer.this.getLocationOnScreen(); |
| } |
| |
| /** |
| * We should post ITEM_STATE_CHANGED event when the same element is |
| * reselected. |
| */ |
| @Override |
| public void setSelectedItem(final Object anObject) { |
| final Object oldSelection = selectedItemReminder; |
| if (oldSelection != null && oldSelection.equals(anObject)) { |
| selectedItemChanged(); |
| } |
| super.setSelectedItem(anObject); |
| } |
| |
| @Override |
| public void firePopupMenuWillBecomeVisible() { |
| super.firePopupMenuWillBecomeVisible(); |
| SwingUtilities.invokeLater(() -> { |
| JPopupMenu popupMenu = getPopupMenu(); |
| // Need to override the invoker for proper grab handling |
| if (popupMenu != null |
| && popupMenu.isShowing() |
| && popupMenu.getInvoker() != getTarget()) { |
| // The popup is now visible with correct location |
| // Save it and restore after toggling visibility and changing invoker |
| Point loc = popupMenu.getLocationOnScreen(); |
| SwingUtilities.convertPointFromScreen(loc, this); |
| popupMenu.setVisible(false); |
| popupMenu.show(getTarget(), loc.x, loc.y); |
| } |
| }); |
| } |
| |
| private JPopupMenu getPopupMenu() { |
| for (int i = 0; i < getAccessibleContext().getAccessibleChildrenCount(); i++) { |
| Accessible child = getAccessibleContext().getAccessibleChild(i); |
| if (child instanceof JPopupMenu) { |
| return (JPopupMenu) child; |
| } |
| } |
| return null; |
| } |
| } |
| } |