51ef95c396
2 new methods and some fields added to KeyEvent, plus hash of constants introduced Reviewed-by: art
1975 lines
75 KiB
Java
1975 lines
75 KiB
Java
/*
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* Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package javax.swing;
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import sun.swing.SwingUtilities2;
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import sun.swing.UIAction;
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import java.applet.*;
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import java.awt.*;
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import java.awt.event.*;
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import java.awt.dnd.DropTarget;
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import java.util.Vector;
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import java.util.Hashtable;
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import java.lang.reflect.*;
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import javax.accessibility.*;
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import javax.swing.event.MenuDragMouseEvent;
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import javax.swing.plaf.UIResource;
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import javax.swing.text.View;
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import java.security.AccessController;
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import sun.security.action.GetPropertyAction;
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import sun.awt.AppContext;
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/**
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* A collection of utility methods for Swing.
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*
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* @author unknown
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*/
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public class SwingUtilities implements SwingConstants
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{
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// These states are system-wide, rather than AppContext wide.
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private static boolean canAccessEventQueue = false;
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private static boolean eventQueueTested = false;
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/**
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* Indicates if we should change the drop target when a
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* {@code TransferHandler} is set.
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*/
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private static boolean suppressDropSupport;
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/**
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* Indiciates if we've checked the system property for suppressing
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* drop support.
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*/
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private static boolean checkedSuppressDropSupport;
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/**
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* Returns true if <code>setTransferHandler</code> should change the
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* <code>DropTarget</code>.
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*/
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private static boolean getSuppressDropTarget() {
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if (!checkedSuppressDropSupport) {
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suppressDropSupport = Boolean.valueOf(
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AccessController.doPrivileged(
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new GetPropertyAction("suppressSwingDropSupport")));
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checkedSuppressDropSupport = true;
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}
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return suppressDropSupport;
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}
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/**
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* Installs a {@code DropTarget} on the component as necessary for a
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* {@code TransferHandler} change.
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*/
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static void installSwingDropTargetAsNecessary(Component c,
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TransferHandler t) {
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if (!getSuppressDropTarget()) {
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DropTarget dropHandler = c.getDropTarget();
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if ((dropHandler == null) || (dropHandler instanceof UIResource)) {
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if (t == null) {
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c.setDropTarget(null);
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} else if (!GraphicsEnvironment.isHeadless()) {
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c.setDropTarget(new TransferHandler.SwingDropTarget(c));
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}
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}
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}
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}
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/**
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* Return true if <code>a</code> contains <code>b</code>
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*/
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public static final boolean isRectangleContainingRectangle(Rectangle a,Rectangle b) {
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return b.x >= a.x && (b.x + b.width) <= (a.x + a.width) &&
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b.y >= a.y && (b.y + b.height) <= (a.y + a.height);
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}
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/**
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* Return the rectangle (0,0,bounds.width,bounds.height) for the component <code>aComponent</code>
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*/
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public static Rectangle getLocalBounds(Component aComponent) {
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Rectangle b = new Rectangle(aComponent.getBounds());
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b.x = b.y = 0;
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return b;
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}
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/**
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* Returns the first <code>Window </code> ancestor of <code>c</code>, or
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* {@code null} if <code>c</code> is not contained inside a <code>Window</code>.
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*
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* @param c <code>Component</code> to get <code>Window</code> ancestor
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* of.
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* @return the first <code>Window </code> ancestor of <code>c</code>, or
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* {@code null} if <code>c</code> is not contained inside a
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* <code>Window</code>.
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* @since 1.3
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*/
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public static Window getWindowAncestor(Component c) {
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for(Container p = c.getParent(); p != null; p = p.getParent()) {
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if (p instanceof Window) {
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return (Window)p;
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}
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}
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return null;
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}
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/**
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* Converts the location <code>x</code> <code>y</code> to the
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* parents coordinate system, returning the location.
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*/
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static Point convertScreenLocationToParent(Container parent,int x, int y) {
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for (Container p = parent; p != null; p = p.getParent()) {
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if (p instanceof Window) {
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Point point = new Point(x, y);
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SwingUtilities.convertPointFromScreen(point, parent);
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return point;
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}
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}
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throw new Error("convertScreenLocationToParent: no window ancestor");
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}
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/**
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* Convert a <code>aPoint</code> in <code>source</code> coordinate system to
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* <code>destination</code> coordinate system.
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* If <code>source</code> is {@code null}, <code>aPoint</code> is assumed to be in <code>destination</code>'s
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* root component coordinate system.
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* If <code>destination</code> is {@code null}, <code>aPoint</code> will be converted to <code>source</code>'s
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* root component coordinate system.
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* If both <code>source</code> and <code>destination</code> are {@code null}, return <code>aPoint</code>
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* without any conversion.
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*/
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public static Point convertPoint(Component source,Point aPoint,Component destination) {
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Point p;
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if(source == null && destination == null)
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return aPoint;
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if(source == null) {
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source = getWindowAncestor(destination);
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if(source == null)
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throw new Error("Source component not connected to component tree hierarchy");
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}
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p = new Point(aPoint);
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convertPointToScreen(p,source);
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if(destination == null) {
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destination = getWindowAncestor(source);
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if(destination == null)
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throw new Error("Destination component not connected to component tree hierarchy");
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}
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convertPointFromScreen(p,destination);
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return p;
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}
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/**
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* Convert the point <code>(x,y)</code> in <code>source</code> coordinate system to
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* <code>destination</code> coordinate system.
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* If <code>source</code> is {@code null}, <code>(x,y)</code> is assumed to be in <code>destination</code>'s
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* root component coordinate system.
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* If <code>destination</code> is {@code null}, <code>(x,y)</code> will be converted to <code>source</code>'s
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* root component coordinate system.
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* If both <code>source</code> and <code>destination</code> are {@code null}, return <code>(x,y)</code>
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* without any conversion.
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*/
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public static Point convertPoint(Component source,int x, int y,Component destination) {
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Point point = new Point(x,y);
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return convertPoint(source,point,destination);
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}
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/**
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* Convert the rectangle <code>aRectangle</code> in <code>source</code> coordinate system to
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* <code>destination</code> coordinate system.
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* If <code>source</code> is {@code null}, <code>aRectangle</code> is assumed to be in <code>destination</code>'s
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* root component coordinate system.
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* If <code>destination</code> is {@code null}, <code>aRectangle</code> will be converted to <code>source</code>'s
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* root component coordinate system.
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* If both <code>source</code> and <code>destination</code> are {@code null}, return <code>aRectangle</code>
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* without any conversion.
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*/
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public static Rectangle convertRectangle(Component source,Rectangle aRectangle,Component destination) {
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Point point = new Point(aRectangle.x,aRectangle.y);
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point = convertPoint(source,point,destination);
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return new Rectangle(point.x,point.y,aRectangle.width,aRectangle.height);
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}
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/**
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* Convenience method for searching above <code>comp</code> in the
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* component hierarchy and returns the first object of class <code>c</code> it
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* finds. Can return {@code null}, if a class <code>c</code> cannot be found.
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*/
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public static Container getAncestorOfClass(Class<?> c, Component comp)
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{
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if(comp == null || c == null)
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return null;
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Container parent = comp.getParent();
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while(parent != null && !(c.isInstance(parent)))
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parent = parent.getParent();
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return parent;
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}
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/**
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* Convenience method for searching above <code>comp</code> in the
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* component hierarchy and returns the first object of <code>name</code> it
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* finds. Can return {@code null}, if <code>name</code> cannot be found.
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*/
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public static Container getAncestorNamed(String name, Component comp) {
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if(comp == null || name == null)
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return null;
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Container parent = comp.getParent();
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while(parent != null && !(name.equals(parent.getName())))
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parent = parent.getParent();
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return parent;
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}
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/**
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* Returns the deepest visible descendent Component of <code>parent</code>
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* that contains the location <code>x</code>, <code>y</code>.
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* If <code>parent</code> does not contain the specified location,
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* then <code>null</code> is returned. If <code>parent</code> is not a
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* container, or none of <code>parent</code>'s visible descendents
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* contain the specified location, <code>parent</code> is returned.
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*
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* @param parent the root component to begin the search
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* @param x the x target location
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* @param y the y target location
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*/
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public static Component getDeepestComponentAt(Component parent, int x, int y) {
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if (!parent.contains(x, y)) {
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return null;
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}
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if (parent instanceof Container) {
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Component components[] = ((Container)parent).getComponents();
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for (Component comp : components) {
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if (comp != null && comp.isVisible()) {
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Point loc = comp.getLocation();
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if (comp instanceof Container) {
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comp = getDeepestComponentAt(comp, x - loc.x, y - loc.y);
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} else {
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comp = comp.getComponentAt(x - loc.x, y - loc.y);
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}
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if (comp != null && comp.isVisible()) {
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return comp;
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}
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}
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}
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}
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return parent;
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}
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/**
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* Returns a MouseEvent similar to <code>sourceEvent</code> except that its x
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* and y members have been converted to <code>destination</code>'s coordinate
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* system. If <code>source</code> is {@code null}, <code>sourceEvent</code> x and y members
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* are assumed to be into <code>destination</code>'s root component coordinate system.
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* If <code>destination</code> is <code>null</code>, the
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* returned MouseEvent will be in <code>source</code>'s coordinate system.
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* <code>sourceEvent</code> will not be changed. A new event is returned.
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* the <code>source</code> field of the returned event will be set
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* to <code>destination</code> if destination is non-{@code null}
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* use the translateMouseEvent() method to translate a mouse event from
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* one component to another without changing the source.
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*/
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public static MouseEvent convertMouseEvent(Component source,
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MouseEvent sourceEvent,
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Component destination) {
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Point p = convertPoint(source,new Point(sourceEvent.getX(),
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sourceEvent.getY()),
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destination);
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Component newSource;
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if(destination != null)
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newSource = destination;
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else
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newSource = source;
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MouseEvent newEvent;
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if (sourceEvent instanceof MouseWheelEvent) {
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MouseWheelEvent sourceWheelEvent = (MouseWheelEvent)sourceEvent;
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newEvent = new MouseWheelEvent(newSource,
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sourceWheelEvent.getID(),
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sourceWheelEvent.getWhen(),
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sourceWheelEvent.getModifiers(),
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p.x,p.y,
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sourceWheelEvent.getXOnScreen(),
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sourceWheelEvent.getYOnScreen(),
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sourceWheelEvent.getClickCount(),
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sourceWheelEvent.isPopupTrigger(),
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sourceWheelEvent.getScrollType(),
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sourceWheelEvent.getScrollAmount(),
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sourceWheelEvent.getWheelRotation());
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}
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else if (sourceEvent instanceof MenuDragMouseEvent) {
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MenuDragMouseEvent sourceMenuDragEvent = (MenuDragMouseEvent)sourceEvent;
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newEvent = new MenuDragMouseEvent(newSource,
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sourceMenuDragEvent.getID(),
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sourceMenuDragEvent.getWhen(),
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sourceMenuDragEvent.getModifiers(),
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p.x,p.y,
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sourceMenuDragEvent.getXOnScreen(),
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sourceMenuDragEvent.getYOnScreen(),
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sourceMenuDragEvent.getClickCount(),
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sourceMenuDragEvent.isPopupTrigger(),
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sourceMenuDragEvent.getPath(),
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sourceMenuDragEvent.getMenuSelectionManager());
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}
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else {
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newEvent = new MouseEvent(newSource,
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sourceEvent.getID(),
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sourceEvent.getWhen(),
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sourceEvent.getModifiers(),
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p.x,p.y,
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sourceEvent.getXOnScreen(),
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sourceEvent.getYOnScreen(),
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sourceEvent.getClickCount(),
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sourceEvent.isPopupTrigger(),
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MouseEvent.NOBUTTON );
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}
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return newEvent;
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}
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/**
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* Convert a point from a component's coordinate system to
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* screen coordinates.
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*
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* @param p a Point object (converted to the new coordinate system)
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* @param c a Component object
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*/
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public static void convertPointToScreen(Point p,Component c) {
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Rectangle b;
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int x,y;
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do {
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if(c instanceof JComponent) {
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x = c.getX();
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y = c.getY();
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} else if(c instanceof java.applet.Applet ||
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c instanceof java.awt.Window) {
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try {
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Point pp = c.getLocationOnScreen();
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x = pp.x;
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y = pp.y;
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} catch (IllegalComponentStateException icse) {
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x = c.getX();
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y = c.getY();
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}
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} else {
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x = c.getX();
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y = c.getY();
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}
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p.x += x;
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p.y += y;
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if(c instanceof java.awt.Window || c instanceof java.applet.Applet)
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break;
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c = c.getParent();
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} while(c != null);
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}
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/**
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* Convert a point from a screen coordinates to a component's
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* coordinate system
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*
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* @param p a Point object (converted to the new coordinate system)
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* @param c a Component object
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*/
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public static void convertPointFromScreen(Point p,Component c) {
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Rectangle b;
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int x,y;
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do {
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if(c instanceof JComponent) {
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x = c.getX();
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y = c.getY();
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} else if(c instanceof java.applet.Applet ||
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c instanceof java.awt.Window) {
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try {
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Point pp = c.getLocationOnScreen();
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x = pp.x;
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y = pp.y;
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} catch (IllegalComponentStateException icse) {
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x = c.getX();
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y = c.getY();
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}
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} else {
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x = c.getX();
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y = c.getY();
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}
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p.x -= x;
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p.y -= y;
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if(c instanceof java.awt.Window || c instanceof java.applet.Applet)
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break;
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c = c.getParent();
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} while(c != null);
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}
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/**
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* Returns the first <code>Window </code> ancestor of <code>c</code>, or
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* {@code null} if <code>c</code> is not contained inside a <code>Window</code>.
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* <p>
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* Note: This method provides the same functionality as
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* <code>getWindowAncestor</code>.
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*
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* @param c <code>Component</code> to get <code>Window</code> ancestor
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* of.
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* @return the first <code>Window </code> ancestor of <code>c</code>, or
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* {@code null} if <code>c</code> is not contained inside a
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* <code>Window</code>.
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*/
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public static Window windowForComponent(Component c) {
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return getWindowAncestor(c);
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}
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/**
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* Return <code>true</code> if a component <code>a</code> descends from a component <code>b</code>
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*/
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public static boolean isDescendingFrom(Component a,Component b) {
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if(a == b)
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return true;
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for(Container p = a.getParent();p!=null;p=p.getParent())
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if(p == b)
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return true;
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return false;
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}
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/**
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* Convenience to calculate the intersection of two rectangles
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* without allocating a new rectangle.
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* If the two rectangles don't intersect,
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* then the returned rectangle begins at (0,0)
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* and has zero width and height.
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*
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* @param x the X coordinate of the first rectangle's top-left point
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* @param y the Y coordinate of the first rectangle's top-left point
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* @param width the width of the first rectangle
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* @param height the height of the first rectangle
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* @param dest the second rectangle
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*
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* @return <code>dest</code>, modified to specify the intersection
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*/
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public static Rectangle computeIntersection(int x,int y,int width,int height,Rectangle dest) {
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int x1 = (x > dest.x) ? x : dest.x;
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int x2 = ((x+width) < (dest.x + dest.width)) ? (x+width) : (dest.x + dest.width);
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int y1 = (y > dest.y) ? y : dest.y;
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int y2 = ((y + height) < (dest.y + dest.height) ? (y+height) : (dest.y + dest.height));
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dest.x = x1;
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dest.y = y1;
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dest.width = x2 - x1;
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dest.height = y2 - y1;
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// If rectangles don't intersect, return zero'd intersection.
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if (dest.width < 0 || dest.height < 0) {
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dest.x = dest.y = dest.width = dest.height = 0;
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}
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return dest;
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}
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/**
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* Convenience method that calculates the union of two rectangles
|
|
* without allocating a new rectangle.
|
|
*
|
|
* @param x the x-coordinate of the first rectangle
|
|
* @param y the y-coordinate of the first rectangle
|
|
* @param width the width of the first rectangle
|
|
* @param height the height of the first rectangle
|
|
* @param dest the coordinates of the second rectangle; the union
|
|
* of the two rectangles is returned in this rectangle
|
|
* @return the <code>dest</code> <code>Rectangle</code>
|
|
*/
|
|
public static Rectangle computeUnion(int x,int y,int width,int height,Rectangle dest) {
|
|
int x1 = (x < dest.x) ? x : dest.x;
|
|
int x2 = ((x+width) > (dest.x + dest.width)) ? (x+width) : (dest.x + dest.width);
|
|
int y1 = (y < dest.y) ? y : dest.y;
|
|
int y2 = ((y+height) > (dest.y + dest.height)) ? (y+height) : (dest.y + dest.height);
|
|
|
|
dest.x = x1;
|
|
dest.y = y1;
|
|
dest.width = (x2 - x1);
|
|
dest.height= (y2 - y1);
|
|
return dest;
|
|
}
|
|
|
|
/**
|
|
* Convenience returning an array of rect representing the regions within
|
|
* <code>rectA</code> that do not overlap with <code>rectB</code>. If the
|
|
* two Rects do not overlap, returns an empty array
|
|
*/
|
|
public static Rectangle[] computeDifference(Rectangle rectA,Rectangle rectB) {
|
|
if (rectB == null || !rectA.intersects(rectB) || isRectangleContainingRectangle(rectB,rectA)) {
|
|
return new Rectangle[0];
|
|
}
|
|
|
|
Rectangle t = new Rectangle();
|
|
Rectangle a=null,b=null,c=null,d=null;
|
|
Rectangle result[];
|
|
int rectCount = 0;
|
|
|
|
/* rectA contains rectB */
|
|
if (isRectangleContainingRectangle(rectA,rectB)) {
|
|
t.x = rectA.x; t.y = rectA.y; t.width = rectB.x - rectA.x; t.height = rectA.height;
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.x = rectB.x; t.y = rectA.y; t.width = rectB.width; t.height = rectB.y - rectA.y;
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.x = rectB.x; t.y = rectB.y + rectB.height; t.width = rectB.width;
|
|
t.height = rectA.y + rectA.height - (rectB.y + rectB.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
c = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.x = rectB.x + rectB.width; t.y = rectA.y; t.width = rectA.x + rectA.width - (rectB.x + rectB.width);
|
|
t.height = rectA.height;
|
|
if(t.width > 0 && t.height > 0) {
|
|
d = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
/* 1 */
|
|
if (rectB.x <= rectA.x && rectB.y <= rectA.y) {
|
|
if ((rectB.x + rectB.width) > (rectA.x + rectA.width)) {
|
|
|
|
t.x = rectA.x; t.y = rectB.y + rectB.height;
|
|
t.width = rectA.width; t.height = rectA.y + rectA.height - (rectB.y + rectB.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = t;
|
|
rectCount++;
|
|
}
|
|
} else if ((rectB.y + rectB.height) > (rectA.y + rectA.height)) {
|
|
t.setBounds((rectB.x + rectB.width), rectA.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width), rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = t;
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
t.setBounds((rectB.x + rectB.width), rectA.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width),
|
|
(rectB.y + rectB.height) - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, (rectB.y + rectB.height), rectA.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
}
|
|
} else if (rectB.x <= rectA.x && (rectB.y + rectB.height) >= (rectA.y + rectA.height)) {
|
|
if ((rectB.x + rectB.width) > (rectA.x + rectA.width)) {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = t;
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
t.setBounds((rectB.x + rectB.width), rectB.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width),
|
|
(rectA.y + rectA.height) - rectB.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
}
|
|
} else if (rectB.x <= rectA.x) {
|
|
if ((rectB.x + rectB.width) >= (rectA.x + rectA.width)) {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width>0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, (rectB.y + rectB.height), rectA.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds((rectB.x + rectB.width), rectB.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width),
|
|
rectB.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, (rectB.y + rectB.height), rectA.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
c = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
}
|
|
} else if (rectB.x <= (rectA.x + rectA.width) && (rectB.x + rectB.width) > (rectA.x + rectA.width)) {
|
|
if (rectB.y <= rectA.y && (rectB.y + rectB.height) > (rectA.y + rectA.height)) {
|
|
t.setBounds(rectA.x, rectA.y, rectB.x - rectA.x, rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = t;
|
|
rectCount++;
|
|
}
|
|
} else if (rectB.y <= rectA.y) {
|
|
t.setBounds(rectA.x, rectA.y, rectB.x - rectA.x,
|
|
(rectB.y + rectB.height) - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, (rectB.y + rectB.height), rectA.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else if ((rectB.y + rectB.height) > (rectA.y + rectA.height)) {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, rectB.y, rectB.x - rectA.x,
|
|
(rectA.y + rectA.height) - rectB.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
t.setBounds(rectA.x, rectA.y, rectA.width, rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, rectB.y, rectB.x - rectA.x,
|
|
rectB.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectA.x, (rectB.y + rectB.height), rectA.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
c = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
}
|
|
} else if (rectB.x >= rectA.x && (rectB.x + rectB.width) <= (rectA.x + rectA.width)) {
|
|
if (rectB.y <= rectA.y && (rectB.y + rectB.height) > (rectA.y + rectA.height)) {
|
|
t.setBounds(rectA.x, rectA.y, rectB.x - rectA.x, rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
t.setBounds((rectB.x + rectB.width), rectA.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width), rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else if (rectB.y <= rectA.y) {
|
|
t.setBounds(rectA.x, rectA.y, rectB.x - rectA.x, rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectB.x, (rectB.y + rectB.height),
|
|
rectB.width,
|
|
(rectA.y + rectA.height) - (rectB.y + rectB.height));
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds((rectB.x + rectB.width), rectA.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width), rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
c = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
} else {
|
|
t.setBounds(rectA.x, rectA.y, rectB.x - rectA.x, rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
a = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds(rectB.x, rectA.y, rectB.width,
|
|
rectB.y - rectA.y);
|
|
if(t.width > 0 && t.height > 0) {
|
|
b = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
|
|
t.setBounds((rectB.x + rectB.width), rectA.y,
|
|
(rectA.x + rectA.width) - (rectB.x + rectB.width), rectA.height);
|
|
if(t.width > 0 && t.height > 0) {
|
|
c = new Rectangle(t);
|
|
rectCount++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
result = new Rectangle[rectCount];
|
|
rectCount = 0;
|
|
if(a != null)
|
|
result[rectCount++] = a;
|
|
if(b != null)
|
|
result[rectCount++] = b;
|
|
if(c != null)
|
|
result[rectCount++] = c;
|
|
if(d != null)
|
|
result[rectCount++] = d;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the mouse event specifies the left mouse button.
|
|
*
|
|
* @param anEvent a MouseEvent object
|
|
* @return true if the left mouse button was active
|
|
*/
|
|
public static boolean isLeftMouseButton(MouseEvent anEvent) {
|
|
return ((anEvent.getModifiers() & InputEvent.BUTTON1_MASK) != 0);
|
|
}
|
|
|
|
/**
|
|
* Returns true if the mouse event specifies the middle mouse button.
|
|
*
|
|
* @param anEvent a MouseEvent object
|
|
* @return true if the middle mouse button was active
|
|
*/
|
|
public static boolean isMiddleMouseButton(MouseEvent anEvent) {
|
|
return ((anEvent.getModifiers() & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK);
|
|
}
|
|
|
|
/**
|
|
* Returns true if the mouse event specifies the right mouse button.
|
|
*
|
|
* @param anEvent a MouseEvent object
|
|
* @return true if the right mouse button was active
|
|
*/
|
|
public static boolean isRightMouseButton(MouseEvent anEvent) {
|
|
return ((anEvent.getModifiers() & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK);
|
|
}
|
|
|
|
/**
|
|
* Compute the width of the string using a font with the specified
|
|
* "metrics" (sizes).
|
|
*
|
|
* @param fm a FontMetrics object to compute with
|
|
* @param str the String to compute
|
|
* @return an int containing the string width
|
|
*/
|
|
public static int computeStringWidth(FontMetrics fm,String str) {
|
|
// You can't assume that a string's width is the sum of its
|
|
// characters' widths in Java2D -- it may be smaller due to
|
|
// kerning, etc.
|
|
return SwingUtilities2.stringWidth(null, fm, str);
|
|
}
|
|
|
|
/**
|
|
* Compute and return the location of the icons origin, the
|
|
* location of origin of the text baseline, and a possibly clipped
|
|
* version of the compound labels string. Locations are computed
|
|
* relative to the viewR rectangle.
|
|
* The JComponents orientation (LEADING/TRAILING) will also be taken
|
|
* into account and translated into LEFT/RIGHT values accordingly.
|
|
*/
|
|
public static String layoutCompoundLabel(JComponent c,
|
|
FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
boolean orientationIsLeftToRight = true;
|
|
int hAlign = horizontalAlignment;
|
|
int hTextPos = horizontalTextPosition;
|
|
|
|
if (c != null) {
|
|
if (!(c.getComponentOrientation().isLeftToRight())) {
|
|
orientationIsLeftToRight = false;
|
|
}
|
|
}
|
|
|
|
// Translate LEADING/TRAILING values in horizontalAlignment
|
|
// to LEFT/RIGHT values depending on the components orientation
|
|
switch (horizontalAlignment) {
|
|
case LEADING:
|
|
hAlign = (orientationIsLeftToRight) ? LEFT : RIGHT;
|
|
break;
|
|
case TRAILING:
|
|
hAlign = (orientationIsLeftToRight) ? RIGHT : LEFT;
|
|
break;
|
|
}
|
|
|
|
// Translate LEADING/TRAILING values in horizontalTextPosition
|
|
// to LEFT/RIGHT values depending on the components orientation
|
|
switch (horizontalTextPosition) {
|
|
case LEADING:
|
|
hTextPos = (orientationIsLeftToRight) ? LEFT : RIGHT;
|
|
break;
|
|
case TRAILING:
|
|
hTextPos = (orientationIsLeftToRight) ? RIGHT : LEFT;
|
|
break;
|
|
}
|
|
|
|
return layoutCompoundLabelImpl(c,
|
|
fm,
|
|
text,
|
|
icon,
|
|
verticalAlignment,
|
|
hAlign,
|
|
verticalTextPosition,
|
|
hTextPos,
|
|
viewR,
|
|
iconR,
|
|
textR,
|
|
textIconGap);
|
|
}
|
|
|
|
/**
|
|
* Compute and return the location of the icons origin, the
|
|
* location of origin of the text baseline, and a possibly clipped
|
|
* version of the compound labels string. Locations are computed
|
|
* relative to the viewR rectangle.
|
|
* This layoutCompoundLabel() does not know how to handle LEADING/TRAILING
|
|
* values in horizontalTextPosition (they will default to RIGHT) and in
|
|
* horizontalAlignment (they will default to CENTER).
|
|
* Use the other version of layoutCompoundLabel() instead.
|
|
*/
|
|
public static String layoutCompoundLabel(
|
|
FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
return layoutCompoundLabelImpl(null, fm, text, icon,
|
|
verticalAlignment,
|
|
horizontalAlignment,
|
|
verticalTextPosition,
|
|
horizontalTextPosition,
|
|
viewR, iconR, textR, textIconGap);
|
|
}
|
|
|
|
/**
|
|
* Compute and return the location of the icons origin, the
|
|
* location of origin of the text baseline, and a possibly clipped
|
|
* version of the compound labels string. Locations are computed
|
|
* relative to the viewR rectangle.
|
|
* This layoutCompoundLabel() does not know how to handle LEADING/TRAILING
|
|
* values in horizontalTextPosition (they will default to RIGHT) and in
|
|
* horizontalAlignment (they will default to CENTER).
|
|
* Use the other version of layoutCompoundLabel() instead.
|
|
*/
|
|
private static String layoutCompoundLabelImpl(
|
|
JComponent c,
|
|
FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
/* Initialize the icon bounds rectangle iconR.
|
|
*/
|
|
|
|
if (icon != null) {
|
|
iconR.width = icon.getIconWidth();
|
|
iconR.height = icon.getIconHeight();
|
|
}
|
|
else {
|
|
iconR.width = iconR.height = 0;
|
|
}
|
|
|
|
/* Initialize the text bounds rectangle textR. If a null
|
|
* or and empty String was specified we substitute "" here
|
|
* and use 0,0,0,0 for textR.
|
|
*/
|
|
|
|
boolean textIsEmpty = (text == null) || text.equals("");
|
|
int lsb = 0;
|
|
int rsb = 0;
|
|
/* Unless both text and icon are non-null, we effectively ignore
|
|
* the value of textIconGap.
|
|
*/
|
|
int gap;
|
|
|
|
View v;
|
|
if (textIsEmpty) {
|
|
textR.width = textR.height = 0;
|
|
text = "";
|
|
gap = 0;
|
|
}
|
|
else {
|
|
int availTextWidth;
|
|
gap = (icon == null) ? 0 : textIconGap;
|
|
|
|
if (horizontalTextPosition == CENTER) {
|
|
availTextWidth = viewR.width;
|
|
}
|
|
else {
|
|
availTextWidth = viewR.width - (iconR.width + gap);
|
|
}
|
|
v = (c != null) ? (View) c.getClientProperty("html") : null;
|
|
if (v != null) {
|
|
textR.width = Math.min(availTextWidth,
|
|
(int) v.getPreferredSpan(View.X_AXIS));
|
|
textR.height = (int) v.getPreferredSpan(View.Y_AXIS);
|
|
} else {
|
|
textR.width = SwingUtilities2.stringWidth(c, fm, text);
|
|
|
|
// Take into account the left and right side bearings.
|
|
// This gives more space than it is actually needed,
|
|
// but there are two reasons:
|
|
// 1. If we set the width to the actual bounds,
|
|
// all callers would have to account for the bearings
|
|
// themselves. NOTE: all pref size calculations don't do it.
|
|
// 2. You can do a drawString at the returned location
|
|
// and the text won't be clipped.
|
|
lsb = SwingUtilities2.getLeftSideBearing(c, fm, text);
|
|
if (lsb < 0) {
|
|
textR.width -= lsb;
|
|
}
|
|
rsb = SwingUtilities2.getRightSideBearing(c, fm, text);
|
|
if (rsb > 0) {
|
|
textR.width += rsb;
|
|
}
|
|
|
|
if (textR.width > availTextWidth) {
|
|
text = SwingUtilities2.clipString(c, fm, text,
|
|
availTextWidth);
|
|
textR.width = SwingUtilities2.stringWidth(c, fm, text);
|
|
}
|
|
textR.height = fm.getHeight();
|
|
}
|
|
}
|
|
|
|
|
|
/* Compute textR.x,y given the verticalTextPosition and
|
|
* horizontalTextPosition properties
|
|
*/
|
|
|
|
if (verticalTextPosition == TOP) {
|
|
if (horizontalTextPosition != CENTER) {
|
|
textR.y = 0;
|
|
}
|
|
else {
|
|
textR.y = -(textR.height + gap);
|
|
}
|
|
}
|
|
else if (verticalTextPosition == CENTER) {
|
|
textR.y = (iconR.height / 2) - (textR.height / 2);
|
|
}
|
|
else { // (verticalTextPosition == BOTTOM)
|
|
if (horizontalTextPosition != CENTER) {
|
|
textR.y = iconR.height - textR.height;
|
|
}
|
|
else {
|
|
textR.y = (iconR.height + gap);
|
|
}
|
|
}
|
|
|
|
if (horizontalTextPosition == LEFT) {
|
|
textR.x = -(textR.width + gap);
|
|
}
|
|
else if (horizontalTextPosition == CENTER) {
|
|
textR.x = (iconR.width / 2) - (textR.width / 2);
|
|
}
|
|
else { // (horizontalTextPosition == RIGHT)
|
|
textR.x = (iconR.width + gap);
|
|
}
|
|
|
|
// WARNING: DefaultTreeCellEditor uses a shortened version of
|
|
// this algorithm to position it's Icon. If you change how this
|
|
// is calculated, be sure and update DefaultTreeCellEditor too.
|
|
|
|
/* labelR is the rectangle that contains iconR and textR.
|
|
* Move it to its proper position given the labelAlignment
|
|
* properties.
|
|
*
|
|
* To avoid actually allocating a Rectangle, Rectangle.union
|
|
* has been inlined below.
|
|
*/
|
|
int labelR_x = Math.min(iconR.x, textR.x);
|
|
int labelR_width = Math.max(iconR.x + iconR.width,
|
|
textR.x + textR.width) - labelR_x;
|
|
int labelR_y = Math.min(iconR.y, textR.y);
|
|
int labelR_height = Math.max(iconR.y + iconR.height,
|
|
textR.y + textR.height) - labelR_y;
|
|
|
|
int dx, dy;
|
|
|
|
if (verticalAlignment == TOP) {
|
|
dy = viewR.y - labelR_y;
|
|
}
|
|
else if (verticalAlignment == CENTER) {
|
|
dy = (viewR.y + (viewR.height / 2)) - (labelR_y + (labelR_height / 2));
|
|
}
|
|
else { // (verticalAlignment == BOTTOM)
|
|
dy = (viewR.y + viewR.height) - (labelR_y + labelR_height);
|
|
}
|
|
|
|
if (horizontalAlignment == LEFT) {
|
|
dx = viewR.x - labelR_x;
|
|
}
|
|
else if (horizontalAlignment == RIGHT) {
|
|
dx = (viewR.x + viewR.width) - (labelR_x + labelR_width);
|
|
}
|
|
else { // (horizontalAlignment == CENTER)
|
|
dx = (viewR.x + (viewR.width / 2)) -
|
|
(labelR_x + (labelR_width / 2));
|
|
}
|
|
|
|
/* Translate textR and glypyR by dx,dy.
|
|
*/
|
|
|
|
textR.x += dx;
|
|
textR.y += dy;
|
|
|
|
iconR.x += dx;
|
|
iconR.y += dy;
|
|
|
|
if (lsb < 0) {
|
|
// lsb is negative. Shift the x location so that the text is
|
|
// visually drawn at the right location.
|
|
textR.x -= lsb;
|
|
|
|
textR.width += lsb;
|
|
}
|
|
if (rsb > 0) {
|
|
textR.width -= rsb;
|
|
}
|
|
|
|
return text;
|
|
}
|
|
|
|
|
|
/**
|
|
* Paints a component to the specified <code>Graphics</code>.
|
|
* This method is primarily useful to render
|
|
* <code>Component</code>s that don't exist as part of the visible
|
|
* containment hierarchy, but are used for rendering. For
|
|
* example, if you are doing your own rendering and want to render
|
|
* some text (or even HTML), you could make use of
|
|
* <code>JLabel</code>'s text rendering support and have it paint
|
|
* directly by way of this method, without adding the label to the
|
|
* visible containment hierarchy.
|
|
* <p>
|
|
* This method makes use of <code>CellRendererPane</code> to handle
|
|
* the actual painting, and is only recommended if you use one
|
|
* component for rendering. If you make use of multiple components
|
|
* to handle the rendering, as <code>JTable</code> does, use
|
|
* <code>CellRendererPane</code> directly. Otherwise, as described
|
|
* below, you could end up with a <code>CellRendererPane</code>
|
|
* per <code>Component</code>.
|
|
* <p>
|
|
* If <code>c</code>'s parent is not a <code>CellRendererPane</code>,
|
|
* a new <code>CellRendererPane</code> is created, <code>c</code> is
|
|
* added to it, and the <code>CellRendererPane</code> is added to
|
|
* <code>p</code>. If <code>c</code>'s parent is a
|
|
* <code>CellRendererPane</code> and the <code>CellRendererPane</code>s
|
|
* parent is not <code>p</code>, it is added to <code>p</code>.
|
|
* <p>
|
|
* The component should either descend from <code>JComponent</code>
|
|
* or be another kind of lightweight component.
|
|
* A lightweight component is one whose "lightweight" property
|
|
* (returned by the <code>Component</code>
|
|
* <code>isLightweight</code> method)
|
|
* is true. If the Component is not lightweight, bad things map happen:
|
|
* crashes, exceptions, painting problems...
|
|
*
|
|
* @param g the <code>Graphics</code> object to draw on
|
|
* @param c the <code>Component</code> to draw
|
|
* @param p the intermediate <code>Container</code>
|
|
* @param x an int specifying the left side of the area draw in, in pixels,
|
|
* measured from the left edge of the graphics context
|
|
* @param y an int specifying the top of the area to draw in, in pixels
|
|
* measured down from the top edge of the graphics context
|
|
* @param w an int specifying the width of the area draw in, in pixels
|
|
* @param h an int specifying the height of the area draw in, in pixels
|
|
*
|
|
* @see CellRendererPane
|
|
* @see java.awt.Component#isLightweight
|
|
*/
|
|
public static void paintComponent(Graphics g, Component c, Container p, int x, int y, int w, int h) {
|
|
getCellRendererPane(c, p).paintComponent(g, c, p, x, y, w, h,false);
|
|
}
|
|
|
|
/**
|
|
* Paints a component to the specified <code>Graphics</code>. This
|
|
* is a cover method for
|
|
* {@link #paintComponent(Graphics,Component,Container,int,int,int,int)}.
|
|
* Refer to it for more information.
|
|
*
|
|
* @param g the <code>Graphics</code> object to draw on
|
|
* @param c the <code>Component</code> to draw
|
|
* @param p the intermediate <code>Container</code>
|
|
* @param r the <code>Rectangle</code> to draw in
|
|
*
|
|
* @see #paintComponent(Graphics,Component,Container,int,int,int,int)
|
|
* @see CellRendererPane
|
|
*/
|
|
public static void paintComponent(Graphics g, Component c, Container p, Rectangle r) {
|
|
paintComponent(g, c, p, r.x, r.y, r.width, r.height);
|
|
}
|
|
|
|
|
|
/*
|
|
* Ensures that cell renderer <code>c</code> has a
|
|
* <code>ComponentShell</code> parent and that
|
|
* the shell's parent is p.
|
|
*/
|
|
private static CellRendererPane getCellRendererPane(Component c, Container p) {
|
|
Container shell = c.getParent();
|
|
if (shell instanceof CellRendererPane) {
|
|
if (shell.getParent() != p) {
|
|
p.add(shell);
|
|
}
|
|
} else {
|
|
shell = new CellRendererPane();
|
|
shell.add(c);
|
|
p.add(shell);
|
|
}
|
|
return (CellRendererPane)shell;
|
|
}
|
|
|
|
/**
|
|
* A simple minded look and feel change: ask each node in the tree
|
|
* to <code>updateUI()</code> -- that is, to initialize its UI property
|
|
* with the current look and feel.
|
|
*/
|
|
public static void updateComponentTreeUI(Component c) {
|
|
updateComponentTreeUI0(c);
|
|
c.invalidate();
|
|
c.validate();
|
|
c.repaint();
|
|
}
|
|
|
|
private static void updateComponentTreeUI0(Component c) {
|
|
if (c instanceof JComponent) {
|
|
JComponent jc = (JComponent) c;
|
|
jc.updateUI();
|
|
JPopupMenu jpm =jc.getComponentPopupMenu();
|
|
if(jpm != null) {
|
|
updateComponentTreeUI(jpm);
|
|
}
|
|
}
|
|
Component[] children = null;
|
|
if (c instanceof JMenu) {
|
|
children = ((JMenu)c).getMenuComponents();
|
|
}
|
|
else if (c instanceof Container) {
|
|
children = ((Container)c).getComponents();
|
|
}
|
|
if (children != null) {
|
|
for (Component child : children) {
|
|
updateComponentTreeUI0(child);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Causes <i>doRun.run()</i> to be executed asynchronously on the
|
|
* AWT event dispatching thread. This will happen after all
|
|
* pending AWT events have been processed. This method should
|
|
* be used when an application thread needs to update the GUI.
|
|
* In the following example the <code>invokeLater</code> call queues
|
|
* the <code>Runnable</code> object <code>doHelloWorld</code>
|
|
* on the event dispatching thread and
|
|
* then prints a message.
|
|
* <pre>
|
|
* Runnable doHelloWorld = new Runnable() {
|
|
* public void run() {
|
|
* System.out.println("Hello World on " + Thread.currentThread());
|
|
* }
|
|
* };
|
|
*
|
|
* SwingUtilities.invokeLater(doHelloWorld);
|
|
* System.out.println("This might well be displayed before the other message.");
|
|
* </pre>
|
|
* If invokeLater is called from the event dispatching thread --
|
|
* for example, from a JButton's ActionListener -- the <i>doRun.run()</i> will
|
|
* still be deferred until all pending events have been processed.
|
|
* Note that if the <i>doRun.run()</i> throws an uncaught exception
|
|
* the event dispatching thread will unwind (not the current thread).
|
|
* <p>
|
|
* Additional documentation and examples for this method can be
|
|
* found in
|
|
* <A HREF="http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html">How to Use Threads</a>,
|
|
* in <em>The Java Tutorial</em>.
|
|
* <p>
|
|
* As of 1.3 this method is just a cover for <code>java.awt.EventQueue.invokeLater()</code>.
|
|
* <p>
|
|
* Unlike the rest of Swing, this method can be invoked from any thread.
|
|
*
|
|
* @see #invokeAndWait
|
|
*/
|
|
public static void invokeLater(Runnable doRun) {
|
|
EventQueue.invokeLater(doRun);
|
|
}
|
|
|
|
|
|
/**
|
|
* Causes <code>doRun.run()</code> to be executed synchronously on the
|
|
* AWT event dispatching thread. This call blocks until
|
|
* all pending AWT events have been processed and (then)
|
|
* <code>doRun.run()</code> returns. This method should
|
|
* be used when an application thread needs to update the GUI.
|
|
* It shouldn't be called from the event dispatching thread.
|
|
* Here's an example that creates a new application thread
|
|
* that uses <code>invokeAndWait</code> to print a string from the event
|
|
* dispatching thread and then, when that's finished, print
|
|
* a string from the application thread.
|
|
* <pre>
|
|
* final Runnable doHelloWorld = new Runnable() {
|
|
* public void run() {
|
|
* System.out.println("Hello World on " + Thread.currentThread());
|
|
* }
|
|
* };
|
|
*
|
|
* Thread appThread = new Thread() {
|
|
* public void run() {
|
|
* try {
|
|
* SwingUtilities.invokeAndWait(doHelloWorld);
|
|
* }
|
|
* catch (Exception e) {
|
|
* e.printStackTrace();
|
|
* }
|
|
* System.out.println("Finished on " + Thread.currentThread());
|
|
* }
|
|
* };
|
|
* appThread.start();
|
|
* </pre>
|
|
* Note that if the <code>Runnable.run</code> method throws an
|
|
* uncaught exception
|
|
* (on the event dispatching thread) it's caught and rethrown, as
|
|
* an <code>InvocationTargetException</code>, on the caller's thread.
|
|
* <p>
|
|
* Additional documentation and examples for this method can be
|
|
* found in
|
|
* <A HREF="http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html">How to Use Threads</a>,
|
|
* in <em>The Java Tutorial</em>.
|
|
* <p>
|
|
* As of 1.3 this method is just a cover for
|
|
* <code>java.awt.EventQueue.invokeAndWait()</code>.
|
|
*
|
|
* @exception InterruptedException if we're interrupted while waiting for
|
|
* the event dispatching thread to finish excecuting
|
|
* <code>doRun.run()</code>
|
|
* @exception InvocationTargetException if an exception is thrown
|
|
* while running <code>doRun</code>
|
|
*
|
|
* @see #invokeLater
|
|
*/
|
|
public static void invokeAndWait(final Runnable doRun)
|
|
throws InterruptedException, InvocationTargetException
|
|
{
|
|
EventQueue.invokeAndWait(doRun);
|
|
}
|
|
|
|
/**
|
|
* Returns true if the current thread is an AWT event dispatching thread.
|
|
* <p>
|
|
* As of 1.3 this method is just a cover for
|
|
* <code>java.awt.EventQueue.isDispatchThread()</code>.
|
|
*
|
|
* @return true if the current thread is an AWT event dispatching thread
|
|
*/
|
|
public static boolean isEventDispatchThread()
|
|
{
|
|
return EventQueue.isDispatchThread();
|
|
}
|
|
|
|
|
|
/*
|
|
* --- Accessibility Support ---
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Get the index of this object in its accessible parent.<p>
|
|
*
|
|
* Note: as of the Java 2 platform v1.3, it is recommended that developers call
|
|
* Component.AccessibleAWTComponent.getAccessibleIndexInParent() instead
|
|
* of using this method.
|
|
*
|
|
* @return -1 of this object does not have an accessible parent.
|
|
* Otherwise, the index of the child in its accessible parent.
|
|
*/
|
|
public static int getAccessibleIndexInParent(Component c) {
|
|
return c.getAccessibleContext().getAccessibleIndexInParent();
|
|
}
|
|
|
|
/**
|
|
* Returns the <code>Accessible</code> child contained at the
|
|
* local coordinate <code>Point</code>, if one exists.
|
|
* Otherwise returns <code>null</code>.
|
|
*
|
|
* @return the <code>Accessible</code> at the specified location,
|
|
* if it exists; otherwise <code>null</code>
|
|
*/
|
|
public static Accessible getAccessibleAt(Component c, Point p) {
|
|
if (c instanceof Container) {
|
|
return c.getAccessibleContext().getAccessibleComponent().getAccessibleAt(p);
|
|
} else if (c instanceof Accessible) {
|
|
Accessible a = (Accessible) c;
|
|
if (a != null) {
|
|
AccessibleContext ac = a.getAccessibleContext();
|
|
if (ac != null) {
|
|
AccessibleComponent acmp;
|
|
Point location;
|
|
int nchildren = ac.getAccessibleChildrenCount();
|
|
for (int i=0; i < nchildren; i++) {
|
|
a = ac.getAccessibleChild(i);
|
|
if ((a != null)) {
|
|
ac = a.getAccessibleContext();
|
|
if (ac != null) {
|
|
acmp = ac.getAccessibleComponent();
|
|
if ((acmp != null) && (acmp.isShowing())) {
|
|
location = acmp.getLocation();
|
|
Point np = new Point(p.x-location.x,
|
|
p.y-location.y);
|
|
if (acmp.contains(np)){
|
|
return a;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return (Accessible) c;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Get the state of this object. <p>
|
|
*
|
|
* Note: as of the Java 2 platform v1.3, it is recommended that developers call
|
|
* Component.AccessibleAWTComponent.getAccessibleIndexInParent() instead
|
|
* of using this method.
|
|
*
|
|
* @return an instance of AccessibleStateSet containing the current state
|
|
* set of the object
|
|
* @see AccessibleState
|
|
*/
|
|
public static AccessibleStateSet getAccessibleStateSet(Component c) {
|
|
return c.getAccessibleContext().getAccessibleStateSet();
|
|
}
|
|
|
|
/**
|
|
* Returns the number of accessible children in the object. If all
|
|
* of the children of this object implement Accessible, than this
|
|
* method should return the number of children of this object. <p>
|
|
*
|
|
* Note: as of the Java 2 platform v1.3, it is recommended that developers call
|
|
* Component.AccessibleAWTComponent.getAccessibleIndexInParent() instead
|
|
* of using this method.
|
|
*
|
|
* @return the number of accessible children in the object.
|
|
*/
|
|
public static int getAccessibleChildrenCount(Component c) {
|
|
return c.getAccessibleContext().getAccessibleChildrenCount();
|
|
}
|
|
|
|
/**
|
|
* Return the nth Accessible child of the object. <p>
|
|
*
|
|
* Note: as of the Java 2 platform v1.3, it is recommended that developers call
|
|
* Component.AccessibleAWTComponent.getAccessibleIndexInParent() instead
|
|
* of using this method.
|
|
*
|
|
* @param i zero-based index of child
|
|
* @return the nth Accessible child of the object
|
|
*/
|
|
public static Accessible getAccessibleChild(Component c, int i) {
|
|
return c.getAccessibleContext().getAccessibleChild(i);
|
|
}
|
|
|
|
/**
|
|
* Return the child <code>Component</code> of the specified
|
|
* <code>Component</code> that is the focus owner, if any.
|
|
*
|
|
* @param c the root of the <code>Component</code> hierarchy to
|
|
* search for the focus owner
|
|
* @return the focus owner, or <code>null</code> if there is no focus
|
|
* owner, or if the focus owner is not <code>comp</code>, or a
|
|
* descendant of <code>comp</code>
|
|
*
|
|
* @see java.awt.KeyboardFocusManager#getFocusOwner
|
|
* @deprecated As of 1.4, replaced by
|
|
* <code>KeyboardFocusManager.getFocusOwner()</code>.
|
|
*/
|
|
@Deprecated
|
|
public static Component findFocusOwner(Component c) {
|
|
Component focusOwner = KeyboardFocusManager.
|
|
getCurrentKeyboardFocusManager().getFocusOwner();
|
|
|
|
// verify focusOwner is a descendant of c
|
|
for (Component temp = focusOwner; temp != null;
|
|
temp = (temp instanceof Window) ? null : temp.getParent())
|
|
{
|
|
if (temp == c) {
|
|
return focusOwner;
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* If c is a JRootPane descendant return its JRootPane ancestor.
|
|
* If c is a RootPaneContainer then return its JRootPane.
|
|
* @return the JRootPane for Component c or {@code null}.
|
|
*/
|
|
public static JRootPane getRootPane(Component c) {
|
|
if (c instanceof RootPaneContainer) {
|
|
return ((RootPaneContainer)c).getRootPane();
|
|
}
|
|
for( ; c != null; c = c.getParent()) {
|
|
if (c instanceof JRootPane) {
|
|
return (JRootPane)c;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the root component for the current component tree.
|
|
* @return the first ancestor of c that's a Window or the last Applet ancestor
|
|
*/
|
|
public static Component getRoot(Component c) {
|
|
Component applet = null;
|
|
for(Component p = c; p != null; p = p.getParent()) {
|
|
if (p instanceof Window) {
|
|
return p;
|
|
}
|
|
if (p instanceof Applet) {
|
|
applet = p;
|
|
}
|
|
}
|
|
return applet;
|
|
}
|
|
|
|
/**
|
|
* Process the key bindings for the <code>Component</code> associated with
|
|
* <code>event</code>. This method is only useful if
|
|
* <code>event.getComponent()</code> does not descend from
|
|
* <code>JComponent</code>, or your are not invoking
|
|
* <code>super.processKeyEvent</code> from within your
|
|
* <code>JComponent</code> subclass. <code>JComponent</code>
|
|
* automatically processes bindings from within its
|
|
* <code>processKeyEvent</code> method, hence you rarely need
|
|
* to directly invoke this method.
|
|
*
|
|
* @param event KeyEvent used to identify which bindings to process, as
|
|
* well as which Component has focus.
|
|
* @return true if a binding has found and processed
|
|
* @since 1.4
|
|
*/
|
|
public static boolean processKeyBindings(KeyEvent event) {
|
|
if (event != null) {
|
|
if (event.isConsumed()) {
|
|
return false;
|
|
}
|
|
|
|
Component component = event.getComponent();
|
|
boolean pressed = (event.getID() == KeyEvent.KEY_PRESSED);
|
|
|
|
if (!isValidKeyEventForKeyBindings(event)) {
|
|
return false;
|
|
}
|
|
// Find the first JComponent in the ancestor hierarchy, and
|
|
// invoke processKeyBindings on it
|
|
while (component != null) {
|
|
if (component instanceof JComponent) {
|
|
return ((JComponent)component).processKeyBindings(
|
|
event, pressed);
|
|
}
|
|
if ((component instanceof Applet) ||
|
|
(component instanceof Window)) {
|
|
// No JComponents, if Window or Applet parent, process
|
|
// WHEN_IN_FOCUSED_WINDOW bindings.
|
|
return JComponent.processKeyBindingsForAllComponents(
|
|
event, (Container)component, pressed);
|
|
}
|
|
component = component.getParent();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the <code>e</code> is a valid KeyEvent to use in
|
|
* processing the key bindings associated with JComponents.
|
|
*/
|
|
static boolean isValidKeyEventForKeyBindings(KeyEvent e) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Invokes <code>actionPerformed</code> on <code>action</code> if
|
|
* <code>action</code> is enabled (and non-{@code null}). The command for the
|
|
* ActionEvent is determined by:
|
|
* <ol>
|
|
* <li>If the action was registered via
|
|
* <code>registerKeyboardAction</code>, then the command string
|
|
* passed in ({@code null} will be used if {@code null} was passed in).
|
|
* <li>Action value with name Action.ACTION_COMMAND_KEY, unless {@code null}.
|
|
* <li>String value of the KeyEvent, unless <code>getKeyChar</code>
|
|
* returns KeyEvent.CHAR_UNDEFINED..
|
|
* </ol>
|
|
* This will return true if <code>action</code> is non-{@code null} and
|
|
* actionPerformed is invoked on it.
|
|
*
|
|
* @since 1.3
|
|
*/
|
|
public static boolean notifyAction(Action action, KeyStroke ks,
|
|
KeyEvent event, Object sender,
|
|
int modifiers) {
|
|
if (action == null) {
|
|
return false;
|
|
}
|
|
if (action instanceof UIAction) {
|
|
if (!((UIAction)action).isEnabled(sender)) {
|
|
return false;
|
|
}
|
|
}
|
|
else if (!action.isEnabled()) {
|
|
return false;
|
|
}
|
|
Object commandO;
|
|
boolean stayNull;
|
|
|
|
// Get the command object.
|
|
commandO = action.getValue(Action.ACTION_COMMAND_KEY);
|
|
if (commandO == null && (action instanceof JComponent.ActionStandin)) {
|
|
// ActionStandin is used for historical reasons to support
|
|
// registerKeyboardAction with a null value.
|
|
stayNull = true;
|
|
}
|
|
else {
|
|
stayNull = false;
|
|
}
|
|
|
|
// Convert it to a string.
|
|
String command;
|
|
|
|
if (commandO != null) {
|
|
command = commandO.toString();
|
|
}
|
|
else if (!stayNull && event.getKeyChar() != KeyEvent.CHAR_UNDEFINED) {
|
|
command = String.valueOf(event.getKeyChar());
|
|
}
|
|
else {
|
|
// Do null for undefined chars, or if registerKeyboardAction
|
|
// was called with a null.
|
|
command = null;
|
|
}
|
|
action.actionPerformed(new ActionEvent(sender,
|
|
ActionEvent.ACTION_PERFORMED, command, event.getWhen(),
|
|
modifiers));
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convenience method to change the UI InputMap for <code>component</code>
|
|
* to <code>uiInputMap</code>. If <code>uiInputMap</code> is {@code null},
|
|
* this removes any previously installed UI InputMap.
|
|
*
|
|
* @since 1.3
|
|
*/
|
|
public static void replaceUIInputMap(JComponent component, int type,
|
|
InputMap uiInputMap) {
|
|
InputMap map = component.getInputMap(type, (uiInputMap != null));
|
|
|
|
while (map != null) {
|
|
InputMap parent = map.getParent();
|
|
if (parent == null || (parent instanceof UIResource)) {
|
|
map.setParent(uiInputMap);
|
|
return;
|
|
}
|
|
map = parent;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Convenience method to change the UI ActionMap for <code>component</code>
|
|
* to <code>uiActionMap</code>. If <code>uiActionMap</code> is {@code null},
|
|
* this removes any previously installed UI ActionMap.
|
|
*
|
|
* @since 1.3
|
|
*/
|
|
public static void replaceUIActionMap(JComponent component,
|
|
ActionMap uiActionMap) {
|
|
ActionMap map = component.getActionMap((uiActionMap != null));
|
|
|
|
while (map != null) {
|
|
ActionMap parent = map.getParent();
|
|
if (parent == null || (parent instanceof UIResource)) {
|
|
map.setParent(uiActionMap);
|
|
return;
|
|
}
|
|
map = parent;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the InputMap provided by the UI for condition
|
|
* <code>condition</code> in component <code>component</code>.
|
|
* <p>This will return {@code null} if the UI has not installed a InputMap
|
|
* of the specified type.
|
|
*
|
|
* @since 1.3
|
|
*/
|
|
public static InputMap getUIInputMap(JComponent component, int condition) {
|
|
InputMap map = component.getInputMap(condition, false);
|
|
while (map != null) {
|
|
InputMap parent = map.getParent();
|
|
if (parent instanceof UIResource) {
|
|
return parent;
|
|
}
|
|
map = parent;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns the ActionMap provided by the UI
|
|
* in component <code>component</code>.
|
|
* <p>This will return {@code null} if the UI has not installed an ActionMap.
|
|
*
|
|
* @since 1.3
|
|
*/
|
|
public static ActionMap getUIActionMap(JComponent component) {
|
|
ActionMap map = component.getActionMap(false);
|
|
while (map != null) {
|
|
ActionMap parent = map.getParent();
|
|
if (parent instanceof UIResource) {
|
|
return parent;
|
|
}
|
|
map = parent;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
// Don't use String, as it's not guaranteed to be unique in a Hashtable.
|
|
private static final Object sharedOwnerFrameKey =
|
|
new StringBuffer("SwingUtilities.sharedOwnerFrame");
|
|
|
|
static class SharedOwnerFrame extends Frame implements WindowListener {
|
|
public void addNotify() {
|
|
super.addNotify();
|
|
installListeners();
|
|
}
|
|
|
|
/**
|
|
* Install window listeners on owned windows to watch for displayability changes
|
|
*/
|
|
void installListeners() {
|
|
Window[] windows = getOwnedWindows();
|
|
for (Window window : windows) {
|
|
if (window != null) {
|
|
window.removeWindowListener(this);
|
|
window.addWindowListener(this);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Watches for displayability changes and disposes shared instance if there are no
|
|
* displayable children left.
|
|
*/
|
|
public void windowClosed(WindowEvent e) {
|
|
synchronized(getTreeLock()) {
|
|
Window[] windows = getOwnedWindows();
|
|
for (Window window : windows) {
|
|
if (window != null) {
|
|
if (window.isDisplayable()) {
|
|
return;
|
|
}
|
|
window.removeWindowListener(this);
|
|
}
|
|
}
|
|
dispose();
|
|
}
|
|
}
|
|
public void windowOpened(WindowEvent e) {
|
|
}
|
|
public void windowClosing(WindowEvent e) {
|
|
}
|
|
public void windowIconified(WindowEvent e) {
|
|
}
|
|
public void windowDeiconified(WindowEvent e) {
|
|
}
|
|
public void windowActivated(WindowEvent e) {
|
|
}
|
|
public void windowDeactivated(WindowEvent e) {
|
|
}
|
|
|
|
public void show() {
|
|
// This frame can never be shown
|
|
}
|
|
public void dispose() {
|
|
try {
|
|
getToolkit().getSystemEventQueue();
|
|
super.dispose();
|
|
} catch (Exception e) {
|
|
// untrusted code not allowed to dispose
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a toolkit-private, shared, invisible Frame
|
|
* to be the owner for JDialogs and JWindows created with
|
|
* {@code null} owners.
|
|
* @exception HeadlessException if GraphicsEnvironment.isHeadless()
|
|
* returns true.
|
|
* @see java.awt.GraphicsEnvironment#isHeadless
|
|
*/
|
|
static Frame getSharedOwnerFrame() throws HeadlessException {
|
|
Frame sharedOwnerFrame =
|
|
(Frame)SwingUtilities.appContextGet(sharedOwnerFrameKey);
|
|
if (sharedOwnerFrame == null) {
|
|
sharedOwnerFrame = new SharedOwnerFrame();
|
|
SwingUtilities.appContextPut(sharedOwnerFrameKey,
|
|
sharedOwnerFrame);
|
|
}
|
|
return sharedOwnerFrame;
|
|
}
|
|
|
|
/**
|
|
* Returns a SharedOwnerFrame's shutdown listener to dispose the SharedOwnerFrame
|
|
* if it has no more displayable children.
|
|
* @exception HeadlessException if GraphicsEnvironment.isHeadless()
|
|
* returns true.
|
|
* @see java.awt.GraphicsEnvironment#isHeadless
|
|
*/
|
|
static WindowListener getSharedOwnerFrameShutdownListener() throws HeadlessException {
|
|
Frame sharedOwnerFrame = getSharedOwnerFrame();
|
|
return (WindowListener)sharedOwnerFrame;
|
|
}
|
|
|
|
/* Don't make these AppContext accessors public or protected --
|
|
* since AppContext is in sun.awt in 1.2, we shouldn't expose it
|
|
* even indirectly with a public API.
|
|
*/
|
|
// REMIND(aim): phase out use of 4 methods below since they
|
|
// are just private covers for AWT methods (?)
|
|
|
|
static Object appContextGet(Object key) {
|
|
return AppContext.getAppContext().get(key);
|
|
}
|
|
|
|
static void appContextPut(Object key, Object value) {
|
|
AppContext.getAppContext().put(key, value);
|
|
}
|
|
|
|
static void appContextRemove(Object key) {
|
|
AppContext.getAppContext().remove(key);
|
|
}
|
|
|
|
|
|
static Class<?> loadSystemClass(String className) throws ClassNotFoundException {
|
|
return Class.forName(className, true, Thread.currentThread().
|
|
getContextClassLoader());
|
|
}
|
|
|
|
|
|
/*
|
|
* Convenience function for determining ComponentOrientation. Helps us
|
|
* avoid having Munge directives throughout the code.
|
|
*/
|
|
static boolean isLeftToRight( Component c ) {
|
|
return c.getComponentOrientation().isLeftToRight();
|
|
}
|
|
private SwingUtilities() {
|
|
throw new Error("SwingUtilities is just a container for static methods");
|
|
}
|
|
|
|
/**
|
|
* Returns true if the Icon <code>icon</code> is an instance of
|
|
* ImageIcon, and the image it contains is the same as <code>image</code>.
|
|
*/
|
|
static boolean doesIconReferenceImage(Icon icon, Image image) {
|
|
Image iconImage = (icon != null && (icon instanceof ImageIcon)) ?
|
|
((ImageIcon)icon).getImage() : null;
|
|
return (iconImage == image);
|
|
}
|
|
|
|
/**
|
|
* Returns index of the first occurrence of <code>mnemonic</code>
|
|
* within string <code>text</code>. Matching algorithm is not
|
|
* case-sensitive.
|
|
*
|
|
* @param text The text to search through, may be {@code null}
|
|
* @param mnemonic The mnemonic to find the character for.
|
|
* @return index into the string if exists, otherwise -1
|
|
*/
|
|
static int findDisplayedMnemonicIndex(String text, int mnemonic) {
|
|
if (text == null || mnemonic == '\0') {
|
|
return -1;
|
|
}
|
|
|
|
char uc = Character.toUpperCase((char)mnemonic);
|
|
char lc = Character.toLowerCase((char)mnemonic);
|
|
|
|
int uci = text.indexOf(uc);
|
|
int lci = text.indexOf(lc);
|
|
|
|
if (uci == -1) {
|
|
return lci;
|
|
} else if(lci == -1) {
|
|
return uci;
|
|
} else {
|
|
return (lci < uci) ? lci : uci;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stores the position and size of
|
|
* the inner painting area of the specified component
|
|
* in <code>r</code> and returns <code>r</code>.
|
|
* The position and size specify the bounds of the component,
|
|
* adjusted so as not to include the border area (the insets).
|
|
* This method is useful for classes
|
|
* that implement painting code.
|
|
*
|
|
* @param c the JComponent in question; if {@code null}, this method returns {@code null}
|
|
* @param r the Rectangle instance to be modified;
|
|
* may be {@code null}
|
|
* @return {@code null} if the Component is {@code null};
|
|
* otherwise, returns the passed-in rectangle (if non-{@code null})
|
|
* or a new rectangle specifying position and size information
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static Rectangle calculateInnerArea(JComponent c, Rectangle r) {
|
|
if (c == null) {
|
|
return null;
|
|
}
|
|
Rectangle rect = r;
|
|
Insets insets = c.getInsets();
|
|
|
|
if (rect == null) {
|
|
rect = new Rectangle();
|
|
}
|
|
|
|
rect.x = insets.left;
|
|
rect.y = insets.top;
|
|
rect.width = c.getWidth() - insets.left - insets.right;
|
|
rect.height = c.getHeight() - insets.top - insets.bottom;
|
|
|
|
return rect;
|
|
}
|
|
|
|
static void updateRendererOrEditorUI(Object rendererOrEditor) {
|
|
if (rendererOrEditor == null) {
|
|
return;
|
|
}
|
|
|
|
Component component = null;
|
|
|
|
if (rendererOrEditor instanceof Component) {
|
|
component = (Component)rendererOrEditor;
|
|
}
|
|
if (rendererOrEditor instanceof DefaultCellEditor) {
|
|
component = ((DefaultCellEditor)rendererOrEditor).getComponent();
|
|
}
|
|
|
|
if (component != null) {
|
|
SwingUtilities.updateComponentTreeUI(component);
|
|
}
|
|
}
|
|
}
|