/*
 * Copyright (c) 2004, Mikael Grev, MiG InfoCom AB. (miglayout (at) miginfocom (dot) com), 
 * modifications by Nikolaus Moll
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this
 * list of conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 * Neither the name of the MiG InfoCom AB nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 */
package org.jowidgets.impl.layout.miglayout;

/**
 * An interface to implement if you want to decide the gaps between two types of components within the same cell.
 * <p>
 * E.g.:
 * 
 * <pre>
 * if (adjacentComp == null || adjacentSide == SwingConstants.LEFT || adjacentSide == SwingConstants.TOP)
 *     return null;
 * 
 * boolean isHor = (adjacentSide == SwingConstants.LEFT || adjacentSide == SwingConstants.RIGHT);
 * 
 * if (adjacentComp.getComponentType(false) == ComponentWrapper.TYPE_LABEL
 *     && comp.getComponentType(false) == ComponentWrapper.TYPE_TEXT_FIELD)
 *     return isHor ? UNRELATED_Y : UNRELATED_Y;
 * 
 * return (adjacentSide == SwingConstants.LEFT || adjacentSide == SwingConstants.RIGHT) ? RELATED_X : RELATED_Y;
 * </pre
 */
interface IInCellGapProviderCommon {
    /**
     * Returns the default gap between two components that <b>are in the same cell</b>.
     * 
     * @param comp The component that the gap is for. Never <code>null</code>.
     * @param adjacentComp The adjacent component if any. May be <code>null</code>.
     * @param adjacentSide What side the <code>adjacentComp</code> is on. {@link javax.swing.SwingUtilities#TOP} or
     *            {@link javax.swing.SwingUtilities#LEFT} or {@link javax.swing.SwingUtilities#BOTTOM} or
     *            {@link javax.swing.SwingUtilities#RIGHT}.
     * @param tag The tag string that the component might be tagged with in the component constraints. May be <code>null</code>.
     * @param isLTR If it is left-to-right.
     * @return The default gap between two components or <code>null</code> if there should be no gap.
     */
    BoundSizeCommon getDefaultGap(
        IComponentWrapperCommon comp,
        IComponentWrapperCommon adjacentComp,
        int adjacentSide,
        String tag,
        boolean isLTR);
}