1 package net.miginfocom.layout;
6 * Copyright (c) 2004, Mikael Grev, MiG InfoCom AB. (miglayout (at) miginfocom (dot) com)
9 * Redistribution and use in source and binary forms, with or without modification,
10 * are permitted provided that the following conditions are met:
11 * Redistributions of source code must retain the above copyright notice, this list
12 * of conditions and the following disclaimer.
13 * Redistributions in binary form must reproduce the above copyright notice, this
14 * list of conditions and the following disclaimer in the documentation and/or other
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16 * Neither the name of the MiG InfoCom AB nor the names of its contributors may be
17 * used to endorse or promote products derived from this software without specific
18 * prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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32 * @author Mikael Grev, MiG InfoCom AB
38 public abstract class UnitConverter
40 /** Value to return if this converter can not handle the <code>unit</code> sent in as an argument
41 * to the convert method.
43 public static final int UNABLE = -87654312;
45 /** Converts <code>value</code> to pixels.
46 * @param value The value to be converted.
47 * @param unit The unit of <code>value</code>. Never <code>null</code> and at least one character.
48 * @param refValue Some reference value that may of may not be used. If the unit is percent for instance this value
49 * is the value to take the percent from. Usually the size of the parent component in the appropriate dimension.
50 * @param isHor If the value is horizontal (<code>true</code>) or vertical (<code>false</code>).
51 * @param parent The parent of the target component that <code>value</code> is to be applied to.
52 * Might for instance be needed to get the screen that the component is on in a multi screen environment.
54 * May be <code>null</code> in which case a "best guess" value should be returned.
55 * @param comp The component, if applicable, or <code>null</code> if none.
56 * @return The number of pixels if <code>unit</code> is handled by this converter, <code>UnitConverter.UNABLE</code> if not.
58 public abstract int convertToPixels(float value, String unit, boolean isHor, float refValue, ContainerWrapper parent, ComponentWrapper comp);