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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/event/FocusEvent.java
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+/* FocusEvent.java -- generated for a focus change
+ Copyright (C) 1999, 2002, 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.awt.event;
+
+import java.awt.Component;
+
+/**
+ * This class represents an event generated when a focus change occurs for a
+ * component. There are both temporary changes, such as when focus is stolen
+ * during a sroll then returned, and permanent changes, such as when the user
+ * TABs through focusable components.
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @see FocusAdapter
+ * @see FocusListener
+ * @since 1.1
+ * @status updated to 1.4
+ */
+public class FocusEvent extends ComponentEvent
+{
+ /**
+ * Compatible with JDK 1.1+.
+ */
+ private static final long serialVersionUID = 523753786457416396L;
+
+ /** This is the first id in the range of ids used by this class. */
+ public static final int FOCUS_FIRST = 1004;
+
+ /** This is the last id in the range of ids used by this class. */
+ public static final int FOCUS_LAST = 1005;
+
+ /** This is the event id for a focus gained event. */
+ public static final int FOCUS_GAINED = 1004;
+
+ /** This is the event id for a focus lost event. */
+ public static final int FOCUS_LOST = 1005;
+
+ /**
+ * Indicates whether or not the focus change is temporary.
+ *
+ * @see #isTemporary()
+ * @serial true if the focus change is temporary
+ */
+ private final boolean temporary;
+
+ /**
+ * The other component which is giving up or stealing focus from this
+ * component, if known.
+ *
+ * @see #getOppositeComponent()
+ * @serial the component with the opposite focus event, or null
+ * @since 1.4
+ */
+ private final Component opposite;
+
+ /**
+ * Initializes a new instance of <code>FocusEvent</code> with the
+ * specified source, id, temporary status, and opposite counterpart. Note
+ * that an invalid id leads to unspecified results.
+ *
+ * @param source the component that is gaining or losing focus
+ * @param id the event id
+ * @param temporary true if the focus change is temporary
+ * @param opposite the component receiving the opposite focus event, or null
+ * @throws IllegalArgumentException if source is null
+ */
+ public FocusEvent(Component source, int id, boolean temporary,
+ Component opposite)
+ {
+ super(source, id);
+ this.temporary = temporary;
+ this.opposite = opposite;
+ }
+
+ /**
+ * Initializes a new instance of <code>FocusEvent</code> with the
+ * specified source, id, and temporary status. Note that an invalid id
+ * leads to unspecified results.
+ *
+ * @param source the component that is gaining or losing focus
+ * @param id the event id
+ * @param temporary true if the focus change is temporary
+ * @throws IllegalArgumentException if source is null
+ */
+ public FocusEvent(Component source, int id, boolean temporary)
+ {
+ this(source, id, temporary, null);
+ }
+
+ /**
+ * Initializes a new instance of <code>FocusEvent</code> with the
+ * specified source and id. Note that an invalid id leads to unspecified
+ * results.
+ *
+ * @param source the component that is gaining or losing focus
+ * @param id the event id
+ * @throws IllegalArgumentException if source is null
+ */
+ public FocusEvent(Component source, int id)
+ {
+ this(source, id, false, null);
+ }
+
+ /**
+ * This method tests whether or not the focus change is temporary or
+ * permanent.
+ *
+ * @return true if the focus change is temporary
+ */
+ public boolean isTemporary()
+ {
+ return temporary;
+ }
+
+ /**
+ * Returns the component which received the opposite focus event. If this
+ * component gained focus, the opposite lost focus; likewise if this
+ * component is giving up focus, the opposite is gaining it. If this
+ * information is unknown, perhaps because the opposite is a native
+ * application, this returns null.
+ *
+ * @return the component with the focus opposite, or null
+ * @since 1.4
+ */
+ public Component getOppositeComponent()
+ {
+ return opposite;
+ }
+
+ /**
+ * Returns a string identifying this event. This is formatted as:
+ * <code>(getID() == FOCUS_GAINED ? "FOCUS_GAINED" : "FOCUS_LOST")
+ * + (isTemporary() ? ",temporary," : ",permanent,") + "opposite="
+ * + getOppositeComponent()</code>.
+ *
+ * @return a string identifying this event
+ */
+ public String paramString()
+ {
+ return (id == FOCUS_GAINED ? "FOCUS_GAINED"
+ : id == FOCUS_LOST ? "FOCUS_LOST" : "unknown type")
+ + (temporary ? ",temporary,opposite=" : ",permanent,opposite=")
+ + opposite;
+ }
+} // class FocusEvent