| /* |
| * Copyright (c) 2011, 2012, 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 com.apple.laf; |
| |
| import java.awt.*; |
| import java.awt.event.KeyEvent; |
| |
| import javax.swing.*; |
| |
| import com.apple.laf.AquaUtils.RecyclableSingleton; |
| import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor; |
| |
| public class AquaMnemonicHandler { |
| private static final RecyclableSingleton<AltProcessor> altProcessor = new RecyclableSingletonFromDefaultConstructor<AltProcessor>(AltProcessor.class); |
| public static KeyEventPostProcessor getInstance() { |
| return altProcessor.get(); |
| } |
| |
| protected static boolean isMnemonicHidden = true; // true by default |
| |
| public static void setMnemonicHidden(final boolean hide) { |
| if (UIManager.getBoolean("Button.showMnemonics")) { |
| // Do not hide mnemonics if the UI defaults do not support this |
| isMnemonicHidden = false; |
| } else { |
| isMnemonicHidden = hide; |
| } |
| } |
| |
| /** |
| * Gets the state of the hide mnemonic flag. This only has meaning if this feature is supported by the underlying OS. |
| * |
| * @return true if mnemonics are hidden, otherwise, false |
| * @see #setMnemonicHidden |
| * @since 1.4 |
| */ |
| public static boolean isMnemonicHidden() { |
| if (UIManager.getBoolean("Button.showMnemonics")) { |
| // Do not hide mnemonics if the UI defaults do not support this |
| isMnemonicHidden = false; |
| } |
| return isMnemonicHidden; |
| } |
| |
| static class AltProcessor implements KeyEventPostProcessor { |
| public boolean postProcessKeyEvent(final KeyEvent ev) { |
| if (ev.getKeyCode() != KeyEvent.VK_ALT) { |
| return false; |
| } |
| |
| final JRootPane root = SwingUtilities.getRootPane(ev.getComponent()); |
| final Window winAncestor = (root == null ? null : SwingUtilities.getWindowAncestor(root)); |
| |
| switch(ev.getID()) { |
| case KeyEvent.KEY_PRESSED: |
| setMnemonicHidden(false); |
| break; |
| case KeyEvent.KEY_RELEASED: |
| setMnemonicHidden(true); |
| break; |
| } |
| |
| repaintMnemonicsInWindow(winAncestor); |
| |
| return false; |
| } |
| } |
| |
| /* |
| * Repaints all the components with the mnemonics in the given window and all its owned windows. |
| */ |
| static void repaintMnemonicsInWindow(final Window w) { |
| if (w == null || !w.isShowing()) { |
| return; |
| } |
| |
| final Window[] ownedWindows = w.getOwnedWindows(); |
| for (final Window element : ownedWindows) { |
| repaintMnemonicsInWindow(element); |
| } |
| |
| repaintMnemonicsInContainer(w); |
| } |
| |
| /* |
| * Repaints all the components with the mnemonics in container. |
| * Recursively searches for all the subcomponents. |
| */ |
| static void repaintMnemonicsInContainer(final Container cont) { |
| for (int i = 0; i < cont.getComponentCount(); i++) { |
| final Component c = cont.getComponent(i); |
| if (c == null || !c.isVisible()) { |
| continue; |
| } |
| |
| if (c instanceof AbstractButton && ((AbstractButton)c).getMnemonic() != '\0') { |
| c.repaint(); |
| continue; |
| } |
| |
| if (c instanceof JLabel && ((JLabel)c).getDisplayedMnemonic() != '\0') { |
| c.repaint(); |
| continue; |
| } |
| |
| if (c instanceof Container) { |
| repaintMnemonicsInContainer((Container)c); |
| } |
| } |
| } |
| } |