2 * Jalview - A Sequence Alignment Editor and Viewer (Development Version 2.4.1)
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3 * Copyright (C) 2009 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
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5 * This program is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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19 package jalview.appletgui;
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21 import java.awt.BorderLayout;
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22 import java.awt.Color;
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23 import java.awt.Container;
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24 import java.awt.FlowLayout;
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25 import java.awt.Font;
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26 import java.awt.Frame;
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27 import java.awt.GraphicsConfiguration;
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28 import java.awt.HeadlessException;
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29 import java.awt.Label;
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30 import java.awt.Menu;
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31 import java.awt.MenuBar;
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32 import java.awt.Panel;
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33 import java.awt.PopupMenu;
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34 import java.awt.event.ActionListener;
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35 import java.awt.event.ItemListener;
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36 import java.awt.event.MouseEvent;
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37 import java.awt.event.MouseListener;
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38 import java.util.Enumeration;
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39 import java.util.Hashtable;
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42 * This class implements a pattern form embedding toolbars as a panel with
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43 * popups for situations where the system menu bar is either invisible or
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44 * inappropriate. It was derived from the code for embedding the jalview applet
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45 * alignFrame as a component on the web-page, which requires the local
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46 * alignFrame menu to be attached to that panel rather than placed on the parent
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47 * (which isn't allowed anyhow). TODO: try to modify the embeddedMenu display so
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48 * it looks like a real toolbar menu TODO: modify click/mouse handler for
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49 * embeddedMenu so it behaves more like a real pulldown menu toolbar
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51 * @author Jim Procter and Andrew Waterhouse
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54 public class EmbmenuFrame extends Frame implements MouseListener
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57 * map from labels to popup menus for the embedded menubar
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59 protected Hashtable embeddedPopup;
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62 * the embedded menu is built on this and should be added to the frame at the
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63 * appropriate position.
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66 protected Panel embeddedMenu;
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68 public EmbmenuFrame() throws HeadlessException
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73 public EmbmenuFrame(String title) throws HeadlessException
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79 * Check if the applet is running on a platform that requires the Frame
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80 * menuBar to be embedded, and if so, embeds it.
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82 * @param tobeAdjusted
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83 * the panel that is to be reduced to make space for the
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85 * @return true if menuBar was embedded and tobeAdjusted's height modified
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87 protected boolean embedMenuIfNeeded(Panel tobeAdjusted)
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89 MenuBar topMenuBar = getMenuBar();
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90 if (topMenuBar == null)
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94 // DEBUG Hint: can test embedded menus by inserting true here.
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95 if (new jalview.util.Platform().isAMac())
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97 // Build the embedded menu panel
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98 embeddedMenu = makeEmbeddedPopupMenu(topMenuBar, "Arial", Font.PLAIN,
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99 10, true); // try to pickup system font.
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101 // add the components to the TreePanel area.
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102 add(embeddedMenu, BorderLayout.NORTH);
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103 tobeAdjusted.setSize(getSize().width, getSize().height
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104 - embeddedMenu.HEIGHT);
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111 * move all menus on menuBar onto embeddedMenu. embeddedPopup is used to store
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112 * the popups for each menu removed from the menuBar and added to the panel.
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113 * NOTE: it is up to the caller to remove menuBar from the Frame if it is
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114 * already attached.
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120 * @param overrideFonts
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121 * true if we take the menuBar fonts in preference to the
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122 * supplied defaults
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123 * @return the embedded menu instance to be added to the frame.
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125 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar, String fn,
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126 int fstyle, int fsz, boolean overrideFonts)
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128 return makeEmbeddedPopupMenu(menuBar, fn, fstyle, fsz, overrideFonts,
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133 * Create or add elements to the embedded menu from menuBar. This removes all
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134 * menu from menuBar and it is up to the caller to remove the now useless
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135 * menuBar from the Frame if it is already attached.
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141 * @param overrideFonts
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143 * true means existing menu will be emptied before adding new
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147 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar, String fn,
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148 int fstyle, int fsz, boolean overrideFonts, boolean append)
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152 if (embeddedPopup != null)
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154 embeddedPopup.clear(); // TODO: check if j1.1
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156 if (embeddedMenu != null)
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158 embeddedMenu.removeAll();
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161 if (embeddedPopup == null)
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163 embeddedPopup = new Hashtable();
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166 embeddedMenu = makeEmbeddedPopupMenu(menuBar, fn, fstyle, fsz,
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167 overrideFonts, embeddedPopup, new Panel(), this);
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168 return embeddedMenu;
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172 * Generic method to move elements from menubar onto embeddedMenu using the
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173 * existing or the supplied font, and adds binding from panel to attached
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174 * menus in embeddedPopup This removes all menu from menuBar and it is up to
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175 * the caller to remove the now useless menuBar from the Frame if it is
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176 * already attached.
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183 * @param overrideFonts
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184 * @param embeddedPopup
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186 * @param embeddedMenu
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187 * if null, a new panel will be created and returned
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188 * @param clickHandler -
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189 * usually the instance of EmbmenuFrame that holds references
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190 * to embeddedPopup and embeddedMenu
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191 * @return the panel instance for convenience.
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193 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar, String fn,
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194 int fstyle, int fsz, boolean overrideFonts,
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195 Hashtable embeddedPopup, Panel embeddedMenu,
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196 MouseListener clickHandler)
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198 if (embeddedPopup == null)
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201 "Implementation error - embeddedPopup must be non-null");
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205 Font mbf = menuBar.getFont();
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208 fn = mbf.getName();
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209 fstyle = mbf.getStyle();
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210 fsz = mbf.getSize();
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213 if (embeddedMenu == null)
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214 embeddedMenu = new Panel();
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215 FlowLayout flowLayout1 = new FlowLayout();
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216 embeddedMenu.setBackground(Color.lightGray);
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217 embeddedMenu.setLayout(flowLayout1);
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219 for (int mbi = 0, nMbi = menuBar.getMenuCount(); mbi < nMbi; mbi++)
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221 Menu mi = menuBar.getMenu(mbi);
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222 Label elab = new Label(mi.getLabel());
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223 elab.setFont(new java.awt.Font(fn, fstyle, fsz));
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224 // add the menu entries
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225 PopupMenu popup = new PopupMenu();
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226 int m, mSize = mi.getItemCount();
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227 for (m = 0; m < mSize; m++)
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229 popup.add(mi.getItem(m));
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233 embeddedPopup.put(elab, popup);
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234 embeddedMenu.add(elab);
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235 elab.addMouseListener(clickHandler);
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237 flowLayout1.setAlignment(FlowLayout.LEFT);
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238 flowLayout1.setHgap(2);
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239 flowLayout1.setVgap(0);
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240 return embeddedMenu;
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243 public void mousePressed(MouseEvent evt)
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245 PopupMenu popup = null;
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246 Label source = (Label) evt.getSource();
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247 popup = getPopupMenu(source);
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250 embeddedMenu.add(popup);
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251 popup.show(embeddedMenu, source.getBounds().x, source.getBounds().y
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252 + source.getBounds().getSize().height);
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257 * get the menu for source from the hash.
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260 * what was clicked on.
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262 PopupMenu getPopupMenu(Label source)
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264 return (PopupMenu) embeddedPopup.get(source);
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267 public void mouseClicked(MouseEvent evt)
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271 public void mouseReleased(MouseEvent evt)
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275 public void mouseEntered(MouseEvent evt)
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279 public void mouseExited(MouseEvent evt)
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284 * called to clear the GUI resources taken up for embedding and remove any
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285 * self references so we can be garbage collected.
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287 public void destroyMenus()
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289 if (embeddedPopup != null)
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291 Enumeration e = embeddedPopup.keys();
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292 while (e.hasMoreElements())
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294 Label lb = (Label) e.nextElement();
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295 lb.removeMouseListener(this);
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297 embeddedPopup.clear();
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299 if (embeddedMenu != null)
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301 embeddedMenu.removeAll();
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306 * calls destroyMenus()
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308 public void finalize() throws Throwable
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311 embeddedPopup = null;
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312 embeddedMenu = null;
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