/* * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.swing;  /** * Constants used with the JScrollPane component. * * @author Hans Muller */public interface ScrollPaneConstants{    /**     * Identifies a "viewport" or display area, within which     * scrolled contents are visible.     */    String VIEWPORT = "VIEWPORT";    /** Identifies a vertical scrollbar. */    String VERTICAL_SCROLLBAR = "VERTICAL_SCROLLBAR";    /** Identifies a horizonal scrollbar. */    String HORIZONTAL_SCROLLBAR = "HORIZONTAL_SCROLLBAR";    /**     * Identifies the area along the left side of the viewport between the     * upper left corner and the lower left corner.     */    String ROW_HEADER = "ROW_HEADER";    /**     * Identifies the area at the top the viewport between the     * upper left corner and the upper right corner.     */    String COLUMN_HEADER = "COLUMN_HEADER";    /** Identifies the lower left corner of the viewport. */    String LOWER_LEFT_CORNER = "LOWER_LEFT_CORNER";    /** Identifies the lower right corner of the viewport. */    String LOWER_RIGHT_CORNER = "LOWER_RIGHT_CORNER";    /** Identifies the upper left corner of the viewport. */    String UPPER_LEFT_CORNER = "UPPER_LEFT_CORNER";    /** Identifies the upper right corner of the viewport. */    String UPPER_RIGHT_CORNER = "UPPER_RIGHT_CORNER";     /** Identifies the lower leading edge corner of the viewport. The leading edge     * is determined relative to the Scroll Pane's ComponentOrientation property.     */    String LOWER_LEADING_CORNER = "LOWER_LEADING_CORNER";    /** Identifies the lower trailing edge corner of the viewport. The trailing edge     * is determined relative to the Scroll Pane's ComponentOrientation property.     */    String LOWER_TRAILING_CORNER = "LOWER_TRAILING_CORNER";    /** Identifies the upper leading edge corner of the viewport.  The leading edge     * is determined relative to the Scroll Pane's ComponentOrientation property.     */    String UPPER_LEADING_CORNER = "UPPER_LEADING_CORNER";    /** Identifies the upper trailing edge corner of the viewport. The trailing edge     * is determined relative to the Scroll Pane's ComponentOrientation property.     */    String UPPER_TRAILING_CORNER = "UPPER_TRAILING_CORNER";     /** Identifies the vertical scroll bar policy property. */    String VERTICAL_SCROLLBAR_POLICY = "VERTICAL_SCROLLBAR_POLICY";    /** Identifies the horizontal scroll bar policy property. */    String HORIZONTAL_SCROLLBAR_POLICY = "HORIZONTAL_SCROLLBAR_POLICY";     /**     * Used to set the vertical scroll bar policy so that     * vertical scrollbars are displayed only when needed.     */    int VERTICAL_SCROLLBAR_AS_NEEDED = 20;    /**     * Used to set the vertical scroll bar policy so that     * vertical scrollbars are never displayed.     */    int VERTICAL_SCROLLBAR_NEVER = 21;    /**     * Used to set the vertical scroll bar policy so that     * vertical scrollbars are always displayed.     */    int VERTICAL_SCROLLBAR_ALWAYS = 22;     /**     * Used to set the horizontal scroll bar policy so that     * horizontal scrollbars are displayed only when needed.     */    int HORIZONTAL_SCROLLBAR_AS_NEEDED = 30;    /**     * Used to set the horizontal scroll bar policy so that     * horizontal scrollbars are never displayed.     */    int HORIZONTAL_SCROLLBAR_NEVER = 31;    /**     * Used to set the horizontal scroll bar policy so that     * horizontal scrollbars are always displayed.     */    int HORIZONTAL_SCROLLBAR_ALWAYS = 32;}