001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.java.navigation.base;
043:
044: import java.awt.event.ActionEvent;
045: import java.awt.event.ActionListener;
046: import java.awt.event.MouseEvent;
047: import javax.swing.JComponent;
048: import javax.swing.Timer;
049: import javax.swing.ToolTipManager;
050:
051: /**
052: * Hack to invoke tooltip on given component on given position immediatelly
053: * at a request.
054: *
055: * XXX - hack is not reliable, could stop working in future JDK releases.
056: * Navigator should better handle tooltips totally itself,
057: * without Swing TooltipManager, to get rid of such hacks.
058: *
059: * @author Dafe Simonek
060: */
061: public final class TooltipHack implements ActionListener {
062:
063: private static TooltipHack instance;
064:
065: /** holds previous dismiss tooltip value */
066: private static int prevDismiss = -1;
067:
068: private TooltipHack() {
069: }
070:
071: /** Hack to invoke tooltip on given JComponent, with given dismiss delay.
072: * Triggers <br>
073: * <code>comp.getToolTipText(MouseEvent)</code> and
074: * <code>comp.getToolTipLocation(MouseEvent)</code> with fake mousemoved
075: * MouseEvent, set to given coordinates.
076: */
077: public static void invokeTip(JComponent comp, int x, int y,
078: int dismissDelay) {
079: final ToolTipManager ttm = ToolTipManager.sharedInstance();
080: final int prevInit = ttm.getInitialDelay();
081: prevDismiss = ttm.getDismissDelay();
082: ttm.setInitialDelay(0);
083: ttm.setDismissDelay(dismissDelay);
084:
085: MouseEvent fakeEvt = new MouseEvent(comp,
086: MouseEvent.MOUSE_MOVED, System.currentTimeMillis(), 0,
087: x, y, 0, false);
088: ttm.mouseMoved(fakeEvt);
089:
090: ttm.setInitialDelay(prevInit);
091: Timer timer = new Timer(20, instance());
092: timer.setRepeats(false);
093: timer.start();
094: }
095:
096: /** impl of ActionListener, reacts on timer and restores Dismiss value.
097: * Don't call from outside classes.
098: */
099: public void actionPerformed(ActionEvent e) {
100: if (prevDismiss > 0) {
101: ToolTipManager.sharedInstance()
102: .setDismissDelay(prevDismiss);
103: prevDismiss = -1;
104: }
105: }
106:
107: private static TooltipHack instance() {
108: if (instance == null) {
109: instance = new TooltipHack();
110: }
111: return instance;
112: }
113:
114: }
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