2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $$Year-Rel$$ The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
21 package jalview.appletgui;
23 import java.awt.BorderLayout;
24 import java.awt.Color;
25 import java.awt.FlowLayout;
27 import java.awt.Frame;
28 import java.awt.HeadlessException;
29 import java.awt.Label;
31 import java.awt.MenuBar;
32 import java.awt.Panel;
33 import java.awt.PopupMenu;
34 import java.awt.event.MouseEvent;
35 import java.awt.event.MouseListener;
36 import java.util.HashMap;
40 * This class implements a pattern for embedding toolbars as a panel with popups
41 * for situations where the system menu bar is either invisible or
42 * inappropriate. It was derived from the code for embedding the jalview applet
43 * alignFrame as a component on the web-page, which requires the local
44 * alignFrame menu to be attached to that panel rather than placed on the parent
45 * (which isn't allowed anyhow). TODO: try to modify the embeddedMenu display so
46 * it looks like a real toolbar menu TODO: modify click/mouse handler for
47 * embeddedMenu so it behaves more like a real pulldown menu toolbar
49 * @author Jim Procter and Andrew Waterhouse
52 public class EmbmenuFrame extends Frame implements MouseListener
54 protected static final Font FONT_ARIAL_PLAIN_11 = new Font("Arial",
57 public static final Font DEFAULT_MENU_FONT = FONT_ARIAL_PLAIN_11;
60 * map from labels to popup menus for the embedded menubar
62 protected Map<Label, PopupMenu> embeddedPopup = new HashMap<Label, PopupMenu>();
65 * the embedded menu is built on this and should be added to the frame at the
66 * appropriate position.
69 protected Panel embeddedMenu;
71 public EmbmenuFrame() throws HeadlessException
76 public EmbmenuFrame(String title) throws HeadlessException
82 * Check if the applet is running on a platform that requires the Frame
83 * menuBar to be embedded, and if so, embeds it.
86 * the panel that is to be reduced to make space for the embedded
88 * @return true if menuBar was embedded and tobeAdjusted's height modified
90 protected boolean embedMenuIfNeeded(Panel tobeAdjusted)
92 MenuBar topMenuBar = getMenuBar();
93 if (topMenuBar == null)
97 // DEBUG Hint: can test embedded menus by inserting true here.
98 if (new jalview.util.Platform().isAMac())
100 // Build the embedded menu panel, allowing override with system font
101 embeddedMenu = makeEmbeddedPopupMenu(topMenuBar, true, false);
103 // add the components to the Panel area.
104 add(embeddedMenu, BorderLayout.NORTH);
105 tobeAdjusted.setSize(getSize().width,
106 getSize().height - embeddedMenu.getHeight());
113 * Create or add elements to the embedded menu from menuBar. This removes all
114 * menu from menuBar and it is up to the caller to remove the now useless
115 * menuBar from the Frame if it is already attached.
118 * @param overrideFonts
120 * true means existing menu will be emptied before adding new
124 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar,
125 boolean overrideFonts, boolean append)
129 embeddedPopup.clear(); // TODO: check if j1.1
130 if (embeddedMenu != null)
132 embeddedMenu.removeAll();
135 embeddedMenu = makeEmbeddedPopupMenu(menuBar, DEFAULT_MENU_FONT,
136 overrideFonts, new Panel(), this);
141 * Generic method to move elements from menubar onto embeddedMenu using the
142 * existing or the supplied font, and adds binding from panel to attached
143 * menus in embeddedPopup This removes all menu from menuBar and it is up to
144 * the caller to remove the now useless menuBar from the Frame if it is
150 * @param overrideFonts
151 * @param embeddedMenu
152 * if null, a new panel will be created and returned
153 * @param clickHandler
154 * - usually the instance of EmbmenuFrame that holds references to
155 * embeddedPopup and embeddedMenu
156 * @return the panel instance for convenience.
158 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar, Font font,
159 boolean overrideFonts, Panel embeddedMenu,
160 MouseListener clickHandler)
164 Font mbf = menuBar.getFont();
170 if (embeddedMenu == null)
172 embeddedMenu = new Panel();
174 FlowLayout flowLayout1 = new FlowLayout();
175 embeddedMenu.setBackground(Color.lightGray);
176 embeddedMenu.setLayout(flowLayout1);
178 for (int mbi = 0, nMbi = menuBar.getMenuCount(); mbi < nMbi; mbi++)
180 Menu mi = menuBar.getMenu(mbi);
181 Label elab = new Label(mi.getLabel());
183 // add the menu entries
184 PopupMenu popup = new PopupMenu();
185 int m, mSize = mi.getItemCount();
186 for (m = 0; m < mSize; m++)
188 popup.add(mi.getItem(m));
192 embeddedPopup.put(elab, popup);
193 embeddedMenu.add(elab);
194 elab.addMouseListener(clickHandler);
196 flowLayout1.setAlignment(FlowLayout.LEFT);
197 flowLayout1.setHgap(2);
198 flowLayout1.setVgap(0);
202 public void mousePressed(MouseEvent evt)
204 PopupMenu popup = null;
205 Label source = (Label) evt.getSource();
206 popup = getPopupMenu(source);
209 embeddedMenu.add(popup);
210 popup.show(embeddedMenu, source.getBounds().x,
211 source.getBounds().y + source.getBounds().getSize().height);
216 * get the menu for source from the hash.
219 * what was clicked on.
221 PopupMenu getPopupMenu(Label source)
223 return embeddedPopup.get(source);
226 public void mouseClicked(MouseEvent evt)
230 public void mouseReleased(MouseEvent evt)
234 public void mouseEntered(MouseEvent evt)
238 public void mouseExited(MouseEvent evt)
243 * called to clear the GUI resources taken up for embedding and remove any
244 * self references so we can be garbage collected.
246 public void destroyMenus()
248 if (embeddedPopup != null)
250 for (Label lb : embeddedPopup.keySet())
252 lb.removeMouseListener(this);
254 embeddedPopup.clear();
256 if (embeddedMenu != null)
258 embeddedMenu.removeAll();
263 * calls destroyMenus()
265 public void finalize() throws Throwable
268 embeddedPopup = null;