Showing the changes to java/pkg/sun/awt/KeyboardFocusManagerPeerImpl.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | +package sun.awt; | |
| 26 | + | |
| 27 | +import java.awt.Component; | |
| 28 | +import java.awt.KeyboardFocusManager; | |
| 29 | +import java.awt.Window; | |
| 30 | +import java.awt.Canvas; | |
| 31 | +import java.awt.Scrollbar; | |
| 32 | +import java.awt.Panel; | |
| 33 | + | |
| 34 | +import java.awt.event.FocusEvent; | |
| 35 | + | |
| 36 | +import java.awt.peer.KeyboardFocusManagerPeer; | |
| 37 | +import java.awt.peer.ComponentPeer; | |
| 38 | + | |
| 39 | +import java.lang.reflect.InvocationTargetException; | |
| 40 | +import java.lang.reflect.Method; | |
| 41 | + | |
| 42 | +import sun.util.logging.PlatformLogger; | |
| 43 | + | |
| 44 | +public abstract class KeyboardFocusManagerPeerImpl implements KeyboardFocusManagerPeer { | |
| 45 | + | |
| 46 | + private static final PlatformLogger focusLog = PlatformLogger.getLogger("sun.awt.focus.KeyboardFocusManagerPeerImpl"); | |
| 47 | + | |
| 48 | + private static AWTAccessor.KeyboardFocusManagerAccessor kfmAccessor = | |
| 49 | + AWTAccessor.getKeyboardFocusManagerAccessor(); | |
| 50 | + | |
| 51 | + // The constants are copied from java.awt.KeyboardFocusManager | |
| 52 | + public static final int SNFH_FAILURE = 0; | |
| 53 | + public static final int SNFH_SUCCESS_HANDLED = 1; | |
| 54 | + public static final int SNFH_SUCCESS_PROCEED = 2; | |
| 55 | + | |
| 56 | + protected KeyboardFocusManager manager; | |
| 57 | + | |
| 58 | + public KeyboardFocusManagerPeerImpl(KeyboardFocusManager manager) { | |
| 59 | + this.manager = manager; | |
| 60 | + } | |
| 61 | + | |
| 62 | + @Override | |
| 63 | + public void clearGlobalFocusOwner(Window activeWindow) { | |
| 64 | + if (activeWindow != null) { | |
| 65 | + Component focusOwner = activeWindow.getFocusOwner(); | |
| 66 | + if (focusLog.isLoggable(PlatformLogger.FINE)) | |
| 67 | + focusLog.fine("Clearing global focus owner " + focusOwner); | |
| 68 | + if (focusOwner != null) { | |
| 69 | + FocusEvent fl = new CausedFocusEvent(focusOwner, FocusEvent.FOCUS_LOST, false, null, | |
| 70 | + CausedFocusEvent.Cause.CLEAR_GLOBAL_FOCUS_OWNER); | |
| 71 | + SunToolkit.postPriorityEvent(fl); | |
| 72 | + } | |
| 73 | + } | |
| 74 | + } | |
| 75 | + | |
| 76 | + /* | |
| 77 | + * WARNING: Don't call it on the Toolkit thread. | |
| 78 | + * | |
| 79 | + * Checks if the component: | |
| 80 | + * 1) accepts focus on click (in general) | |
| 81 | + * 2) may be a focus owner (in particular) | |
| 82 | + */ | |
| 83 | + public static boolean shouldFocusOnClick(Component component) { | |
| 84 | + boolean acceptFocusOnClick = false; | |
| 85 | + | |
| 86 | + // A component is generally allowed to accept focus on click | |
| 87 | + // if its peer is focusable. There're some exceptions though. | |
| 88 | + | |
| 89 | + | |
| 90 | + // CANVAS & SCROLLBAR accept focus on click | |
| 91 | + if (component instanceof Canvas || | |
| 92 | + component instanceof Scrollbar) | |
| 93 | + { | |
| 94 | + acceptFocusOnClick = true; | |
| 95 | + | |
| 96 | + // PANEL, empty only, accepts focus on click | |
| 97 | + } else if (component instanceof Panel) { | |
| 98 | + acceptFocusOnClick = (((Panel)component).getComponentCount() == 0); | |
| 99 | + | |
| 100 | + | |
| 101 | + // Other components | |
| 102 | + } else { | |
| 103 | + ComponentPeer peer = (component != null ? component.getPeer() : null); | |
| 104 | + acceptFocusOnClick = (peer != null ? peer.isFocusable() : false); | |
| 105 | + } | |
| 106 | + return acceptFocusOnClick && | |
| 107 | + AWTAccessor.getComponentAccessor().canBeFocusOwner(component); | |
| 108 | + } | |
| 109 | + | |
| 110 | + /* | |
| 111 | + * Posts proper lost/gain focus events to the event queue. | |
| 112 | + */ | |
| 113 | + public static boolean deliverFocus(Component lightweightChild, | |
| 114 | + Component target, | |
| 115 | + boolean temporary, | |
| 116 | + boolean focusedWindowChangeAllowed, | |
| 117 | + long time, | |
| 118 | + CausedFocusEvent.Cause cause, | |
| 119 | + Component currentFocusOwner) // provided by the descendant peers | |
| 120 | + { | |
| 121 | + if (lightweightChild == null) { | |
| 122 | + lightweightChild = (Component)target; | |
| 123 | + } | |
| 124 | + | |
| 125 | + Component currentOwner = currentFocusOwner; | |
| 126 | + if (currentOwner != null && currentOwner.getPeer() == null) { | |
| 127 | + currentOwner = null; | |
| 128 | + } | |
| 129 | + if (currentOwner != null) { | |
| 130 | + FocusEvent fl = new CausedFocusEvent(currentOwner, FocusEvent.FOCUS_LOST, | |
| 131 | + false, lightweightChild, cause); | |
| 132 | + | |
| 133 | + if (focusLog.isLoggable(PlatformLogger.FINER)) | |
| 134 | + focusLog.finer("Posting focus event: " + fl); | |
| 135 | + SunToolkit.postPriorityEvent(fl); | |
| 136 | + } | |
| 137 | + | |
| 138 | + FocusEvent fg = new CausedFocusEvent(lightweightChild, FocusEvent.FOCUS_GAINED, | |
| 139 | + false, currentOwner, cause); | |
| 140 | + | |
| 141 | + if (focusLog.isLoggable(PlatformLogger.FINER)) | |
| 142 | + focusLog.finer("Posting focus event: " + fg); | |
| 143 | + SunToolkit.postPriorityEvent(fg); | |
| 144 | + return true; | |
| 145 | + } | |
| 146 | + | |
| 147 | + // WARNING: Don't call it on the Toolkit thread. | |
| 148 | + public static boolean requestFocusFor(Component target, CausedFocusEvent.Cause cause) { | |
| 149 | + return AWTAccessor.getComponentAccessor().requestFocus(target, cause); | |
| 150 | + } | |
| 151 | + | |
| 152 | + // WARNING: Don't call it on the Toolkit thread. | |
| 153 | + public static int shouldNativelyFocusHeavyweight(Component heavyweight, | |
| 154 | + Component descendant, | |
| 155 | + boolean temporary, | |
| 156 | + boolean focusedWindowChangeAllowed, | |
| 157 | + long time, | |
| 158 | + CausedFocusEvent.Cause cause) | |
| 159 | + { | |
| 160 | + return kfmAccessor.shouldNativelyFocusHeavyweight( | |
| 161 | + heavyweight, descendant, temporary, focusedWindowChangeAllowed, time, cause); | |
| 162 | + } | |
| 163 | + | |
| 164 | + public static void removeLastFocusRequest(Component heavyweight) { | |
| 165 | + kfmAccessor.removeLastFocusRequest(heavyweight); | |
| 166 | + } | |
| 167 | + | |
| 168 | + // WARNING: Don't call it on the Toolkit thread. | |
| 169 | + public static boolean processSynchronousLightweightTransfer(Component heavyweight, | |
| 170 | + Component descendant, | |
| 171 | + boolean temporary, | |
| 172 | + boolean focusedWindowChangeAllowed, | |
| 173 | + long time) | |
| 174 | + { | |
| 175 | + return kfmAccessor.processSynchronousLightweightTransfer( | |
| 176 | + heavyweight, descendant, temporary, focusedWindowChangeAllowed, time); | |
| 177 | + } | |
| 178 | +} | |