/*
* 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
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*/
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()) {
/**代码未完, 请加载全部代码(NowJava.com).**/