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 | } | ||