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 jalview.util.Platform;
25 import java.awt.BorderLayout;
26 import java.awt.Color;
27 import java.awt.FlowLayout;
29 import java.awt.Frame;
30 import java.awt.HeadlessException;
31 import java.awt.Label;
33 import java.awt.MenuBar;
34 import java.awt.Panel;
35 import java.awt.PopupMenu;
36 import java.awt.event.MouseEvent;
37 import java.awt.event.MouseListener;
38 import java.util.HashMap;
42 * This class implements a pattern for embedding toolbars as a panel with popups
43 * for situations where the system menu bar is either invisible or
44 * inappropriate. It was derived from the code for embedding the jalview applet
45 * alignFrame as a component on the web-page, which requires the local
46 * alignFrame menu to be attached to that panel rather than placed on the parent
47 * (which isn't allowed anyhow). TODO: try to modify the embeddedMenu display so
48 * it looks like a real toolbar menu TODO: modify click/mouse handler for
49 * embeddedMenu so it behaves more like a real pulldown menu toolbar
51 * @author Jim Procter and Andrew Waterhouse
54 @SuppressWarnings("serial")
55 public class EmbmenuFrame extends Frame
56 implements MouseListener, AutoCloseable
58 protected static final Font FONT_ARIAL_PLAIN_11 = new Font("Arial",
61 public static final Font DEFAULT_MENU_FONT = FONT_ARIAL_PLAIN_11;
64 * map from labels to popup menus for the embedded menubar
66 protected Map<Label, PopupMenu> embeddedPopup = new HashMap<>();
69 * the embedded menu is built on this and should be added to the frame at the
70 * appropriate position.
73 protected Panel embeddedMenu;
75 public EmbmenuFrame() throws HeadlessException
80 public EmbmenuFrame(String title) throws HeadlessException
86 * Check if the applet is running on a platform that requires the Frame
87 * menuBar to be embedded, and if so, embeds it.
90 * the panel that is to be reduced to make space for the embedded
92 * @return true if menuBar was embedded and tobeAdjusted's height modified
94 protected boolean embedMenuIfNeeded(Panel tobeAdjusted)
96 MenuBar topMenuBar = getMenuBar();
97 if (topMenuBar == null)
101 // DEBUG Hint: can test embedded menus by inserting true here.
102 if (Platform.isAMacAndNotJS())
104 // Build the embedded menu panel, allowing override with system font
105 embeddedMenu = makeEmbeddedPopupMenu(topMenuBar, true, false);
107 // add the components to the Panel area.
108 add(embeddedMenu, BorderLayout.NORTH);
109 tobeAdjusted.setSize(getSize().width,
110 getSize().height - embeddedMenu.getHeight());
117 * Create or add elements to the embedded menu from menuBar. This removes all
118 * menu from menuBar and it is up to the caller to remove the now useless
119 * menuBar from the Frame if it is already attached.
122 * @param overrideFonts
124 * true means existing menu will be emptied before adding new
128 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar,
129 boolean overrideFonts, boolean append)
133 embeddedPopup.clear(); // TODO: check if j1.1
134 if (embeddedMenu != null)
136 embeddedMenu.removeAll();
139 embeddedMenu = makeEmbeddedPopupMenu(menuBar, DEFAULT_MENU_FONT,
140 overrideFonts, new Panel(), this);
145 * Generic method to move elements from menubar onto embeddedMenu using the
146 * existing or the supplied font, and adds binding from panel to attached
147 * menus in embeddedPopup This removes all menu from menuBar and it is up to
148 * the caller to remove the now useless menuBar from the Frame if it is
154 * @param overrideFonts
155 * @param embeddedMenu
156 * if null, a new panel will be created and returned
157 * @param clickHandler
158 * - usually the instance of EmbmenuFrame that holds references to
159 * embeddedPopup and embeddedMenu
160 * @return the panel instance for convenience.
162 protected Panel makeEmbeddedPopupMenu(MenuBar menuBar, Font font,
163 boolean overrideFonts, Panel embeddedMenu,
164 MouseListener clickHandler)
168 Font mbf = menuBar.getFont();
174 if (embeddedMenu == null)
176 embeddedMenu = new Panel();
178 FlowLayout flowLayout1 = new FlowLayout();
179 embeddedMenu.setBackground(Color.lightGray);
180 embeddedMenu.setLayout(flowLayout1);
182 for (int mbi = 0, nMbi = menuBar.getMenuCount(); mbi < nMbi; mbi++)
184 Menu mi = menuBar.getMenu(mbi);
185 Label elab = new Label(mi.getLabel());
187 // add the menu entries
188 PopupMenu popup = new PopupMenu();
189 int m, mSize = mi.getItemCount();
190 for (m = 0; m < mSize; m++)
192 popup.add(mi.getItem(m));
196 embeddedPopup.put(elab, popup);
197 embeddedMenu.add(elab);
198 elab.addMouseListener(clickHandler);
200 flowLayout1.setAlignment(FlowLayout.LEFT);
201 flowLayout1.setHgap(2);
202 flowLayout1.setVgap(0);
207 public void mousePressed(MouseEvent evt)
209 PopupMenu popup = null;
210 Label source = (Label) evt.getSource();
211 popup = getPopupMenu(source);
214 embeddedMenu.add(popup);
215 popup.show(embeddedMenu, source.getBounds().x,
216 source.getBounds().y + source.getBounds().getSize().height);
221 * get the menu for source from the hash.
224 * what was clicked on.
226 PopupMenu getPopupMenu(Label source)
228 return embeddedPopup.get(source);
232 public void mouseClicked(MouseEvent evt)
237 public void mouseReleased(MouseEvent evt)
242 public void mouseEntered(MouseEvent evt)
247 public void mouseExited(MouseEvent evt)
252 * called to clear the GUI resources taken up for embedding and remove any
253 * self references so we can be garbage collected.
255 public void destroyMenus()
257 if (embeddedPopup != null)
259 for (Label lb : embeddedPopup.keySet())
261 lb.removeMouseListener(this);
263 embeddedPopup.clear();
265 if (embeddedMenu != null)
267 embeddedMenu.removeAll();
272 * calls destroyMenus()
278 embeddedPopup = null;
280 // no close for Frame