| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2008 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.ui; |
| 17 | |
| 18 | import java.awt.event.ActionEvent; |
| 19 | import java.awt.event.ActionListener; |
| 20 | import java.io.File; |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Iterator; |
| 23 | import java.util.List; |
| 24 | |
| 25 | import javax.swing.JMenu; |
| 26 | import javax.swing.JMenuItem; |
| 27 | |
| 28 | import net.sf.jomic.tools.ActionDelegate; |
| 29 | import net.sf.jomic.tools.LocaleTools; |
| 30 | import net.sf.wraplog.Logger; |
| 31 | |
| 32 | /** |
| 33 | * Menu to collect files recently opened. |
| 34 | * |
| 35 | * @author Thomas Aglassinger |
| 36 | */ |
| 37 | public class OpenRecentMenu extends JMenu |
| 38 | { |
| 39 | private static final String OPEN_RECENT = "openRecent"; |
| 40 | |
| 41 | private JMenuItem clearRecentFilesItem; |
| 42 | private ActionDelegate delegate; |
| 43 | private boolean hasFiles; |
| 44 | private LocaleTools localeTools; |
| 45 | private Logger logger; |
| 46 | private List menuItems; |
| 47 | |
| 48 | OpenRecentMenu(ActionDelegate newDelegate) { |
| 49 | super("Open recent"); |
| 50 | assert newDelegate != null; |
| 51 | logger = Logger.getLogger(OpenRecentMenu.class); |
| 52 | localeTools = LocaleTools.instance(); |
| 53 | delegate = newDelegate; |
| 54 | menuItems = new ArrayList(); |
| 55 | setText(localeTools.getMenuItemLabel(LocaleTools.MENU_FILE, OPEN_RECENT)); |
| 56 | clearRecentFilesItem = localeTools.createMenuItem(LocaleTools.MENU_FILE, OPEN_RECENT + ".clearMenu"); |
| 57 | clearRecentFilesItem.setActionCommand(Commands.CLEAR_RECENT); |
| 58 | clearRecentFilesItem.addActionListener( |
| 59 | new ClearOpenRecentMenuListener()); |
| 60 | setEnabled(false); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Enable the menu, unless there are no files, in which case it is disabled. |
| 65 | */ |
| 66 | void setEnabledUnlessEmpty() { |
| 67 | if (logger.isDebugEnabled()) { |
| 68 | logger.debug("setEnabledUnlessEmpty: " + hasFiles); |
| 69 | } |
| 70 | setEnabled(hasFiles); |
| 71 | } |
| 72 | |
| 73 | public void dispose() { |
| 74 | removeAllMenuItems(); |
| 75 | } |
| 76 | |
| 77 | void updateMenuItems(final List files) { |
| 78 | assert files != null; |
| 79 | File[] fileArray = (File[]) files.toArray(new File[0]); |
| 80 | |
| 81 | removeAllMenuItems(); |
| 82 | |
| 83 | int fileCount = fileArray.length; |
| 84 | |
| 85 | for (int i = 0; i < fileCount; i += 1) { |
| 86 | File file = fileArray[i]; |
| 87 | JMenuItem newMenuItem = new JMenuItem(file.getName()); |
| 88 | |
| 89 | menuItems.add(newMenuItem); |
| 90 | |
| 91 | ActionListener listener = new OpenRecentFileActionListener(delegate, file); |
| 92 | |
| 93 | newMenuItem.setActionCommand(Commands.OPEN_RECENT); |
| 94 | newMenuItem.addActionListener(listener); |
| 95 | add(newMenuItem); |
| 96 | } |
| 97 | hasFiles = fileCount > 0; |
| 98 | if (hasFiles) { |
| 99 | addSeparator(); |
| 100 | add(clearRecentFilesItem); |
| 101 | setEnabled(true); |
| 102 | } else { |
| 103 | if (logger.isDebugEnabled()) { |
| 104 | logger.debug("disabled because there are no files"); |
| 105 | } |
| 106 | setEnabled(false); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | private void removeAllMenuItems() { |
| 111 | Iterator rider = menuItems.iterator(); |
| 112 | |
| 113 | while (rider.hasNext()) { |
| 114 | JMenuItem oldMenuItem = (JMenuItem) rider.next(); |
| 115 | ActionListener[] oldListeners = oldMenuItem.getActionListeners(); |
| 116 | int oldListenersCount = oldListeners.length; |
| 117 | |
| 118 | if (oldListenersCount > 0) { |
| 119 | assert oldListenersCount |
| 120 | == 1 : "menu item must have 0 or 1 ActionListener, but has " + oldListenersCount; |
| 121 | oldMenuItem.removeActionListener(oldListeners[0]); |
| 122 | } else { |
| 123 | logger.warn("oldListenerCount = 0; OutOfMemoryError during menu setup?"); |
| 124 | } |
| 125 | } |
| 126 | menuItems.clear(); |
| 127 | removeAll(); |
| 128 | hasFiles = false; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Listener to clear recent files menu. |
| 133 | * |
| 134 | * @author Thomas Aglassinger |
| 135 | */ |
| 136 | private final class ClearOpenRecentMenuListener implements ActionListener |
| 137 | { |
| 138 | private ClearOpenRecentMenuListener() { |
| 139 | // Do nothing. |
| 140 | super(); |
| 141 | } |
| 142 | |
| 143 | public void actionPerformed(final ActionEvent event) { |
| 144 | assert event.getSource() == clearRecentFilesItem; |
| 145 | assert event.getActionCommand() != null; |
| 146 | assert event.getActionCommand().equals(Commands.CLEAR_RECENT); |
| 147 | removeAllMenuItems(); |
| 148 | setEnabled(false); |
| 149 | delegate.actionPerformed(event); |
| 150 | } |
| 151 | } |
| 152 | } |