69 lines
2.8 KiB
Java
69 lines
2.8 KiB
Java
/*
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* Copyright (c) 2000, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.swing;
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import java.awt.Component;
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import java.awt.FocusTraversalPolicy;
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/**
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* A FocusTraversalPolicy which can optionally provide an algorithm for
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* determining a JInternalFrame's initial Component. The initial Component is
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* the first to receive focus when the JInternalFrame is first selected. By
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* default, this is the same as the JInternalFrame's default Component to
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* focus.
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*
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* @author David Mendenhall
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*
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* @since 1.4
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*/
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public abstract class InternalFrameFocusTraversalPolicy
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extends FocusTraversalPolicy
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{
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/**
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* Returns the Component that should receive the focus when a
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* JInternalFrame is selected for the first time. Once the JInternalFrame
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* has been selected by a call to <code>setSelected(true)</code>, the
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* initial Component will not be used again. Instead, if the JInternalFrame
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* loses and subsequently regains selection, or is made invisible or
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* undisplayable and subsequently made visible and displayable, the
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* JInternalFrame's most recently focused Component will become the focus
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* owner. The default implementation of this method returns the
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* JInternalFrame's default Component to focus.
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*
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* @param frame the JInternalFrame whose initial Component is to be
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* returned
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* @return the Component that should receive the focus when frame is
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* selected for the first time, or null if no suitable Component
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* can be found
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* @see JInternalFrame#getMostRecentFocusOwner
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* @throws IllegalArgumentException if window is null
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*/
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public Component getInitialComponent(JInternalFrame frame) {
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return getDefaultComponent(frame);
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}
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}
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