Source Code Cross Referenced for BoundedSize.java in  » Swing-Library » jgoodies-forms » com » jgoodies » forms » layout » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Swing Library » jgoodies forms » com.jgoodies.forms.layout 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2002-2007 JGoodies Karsten Lentzsch. All Rights Reserved.
003:         *
004:         * Redistribution and use in source and binary forms, with or without 
005:         * modification, are permitted provided that the following conditions are met:
006:         * 
007:         *  o Redistributions of source code must retain the above copyright notice, 
008:         *    this list of conditions and the following disclaimer. 
009:         *     
010:         *  o Redistributions in binary form must reproduce the above copyright notice, 
011:         *    this list of conditions and the following disclaimer in the documentation 
012:         *    and/or other materials provided with the distribution. 
013:         *     
014:         *  o Neither the name of JGoodies Karsten Lentzsch nor the names of 
015:         *    its contributors may be used to endorse or promote products derived 
016:         *    from this software without specific prior written permission. 
017:         *     
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
020:         * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
021:         * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
022:         * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
023:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
024:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
025:         * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026:         * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
027:         * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
028:         * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
029:         */
030:
031:        package com.jgoodies.forms.layout;
032:
033:        import java.awt.Container;
034:        import java.io.Serializable;
035:        import java.util.List;
036:
037:        /**
038:         * Describes sizes that provide lower and upper bounds 
039:         * as used by the JGoodies FormLayout.
040:         *
041:         * @author Karsten Lentzsch
042:         * @version $Revision: 1.9 $
043:         * 
044:         * @see	Sizes
045:         * @see	ConstantSize
046:         */
047:        public final class BoundedSize implements  Size, Serializable {
048:
049:            /**
050:             * Holds the base size.
051:             */
052:            private final Size basis;
053:
054:            /**
055:             * Holds an optional lower bound.
056:             */
057:            private Size lowerBound;
058:
059:            /**
060:             * Holds an optional upper bound.
061:             */
062:            private Size upperBound;
063:
064:            // Instance Creation ****************************************************
065:
066:            /**
067:             * Constructs a BoundedSize for the given basis using the
068:             * specified lower and upper bounds.<p>
069:             * 
070:             * TODO: Consider throwing an IllegalArgumentException,
071:             * if the lower bound and upper bound are both <code>null</code>.
072:             * 
073:             * @param basis  the base size
074:             * @param lowerBound  the lower bound size
075:             * @param upperBound  the upper bound size
076:             * 
077:             * @throws NullPointerException if the basis is null
078:             * 
079:             * @since 1.1
080:             */
081:            public BoundedSize(Size basis, Size lowerBound, Size upperBound) {
082:                if (basis == null)
083:                    throw new NullPointerException(
084:                            "The basis of a bounded size must not be null.");
085:                this .basis = basis;
086:                this .lowerBound = lowerBound;
087:                this .upperBound = upperBound;
088:            }
089:
090:            // Accessors ************************************************************
091:
092:            /**
093:             * Returns the base size, which is not-<code>null</code>.
094:             * 
095:             * @return the base size
096:             * 
097:             * @since 1.1
098:             */
099:            public Size getBasis() {
100:                return basis;
101:            }
102:
103:            /**
104:             * Returns the optional lower bound.
105:             * 
106:             * @return the optional lower bound
107:             * 
108:             * @since 1.1
109:             */
110:            public Size getLowerBound() {
111:                return lowerBound;
112:            }
113:
114:            /**
115:             * Returns the optional upper bound.
116:             * 
117:             * @return the optional upper bound
118:             * 
119:             * @since 1.1
120:             */
121:            public Size getUpperBound() {
122:                return upperBound;
123:            }
124:
125:            // Implementation of the Size Interface *********************************
126:
127:            /**
128:             * Returns this size as pixel size. Neither requires the component
129:             * list nor the specified measures. Honors the lower and upper bound.<p>
130:             *  
131:             * Invoked by <code>FormSpec</code> to determine the size of a column or
132:             * row.
133:             * 
134:             * @param container       the layout container
135:             * @param components      the list of components to measure
136:             * @param minMeasure      the measure used to determine the minimum size
137:             * @param prefMeasure     the measure used to determine the preferred size
138:             * @param defaultMeasure  the measure used to determine the default size
139:             * @return the maximum size in pixels
140:             * @see FormSpec#maximumSize(Container, List, FormLayout.Measure, FormLayout.Measure, FormLayout.Measure)
141:             */
142:            public int maximumSize(Container container, List components,
143:                    FormLayout.Measure minMeasure,
144:                    FormLayout.Measure prefMeasure,
145:                    FormLayout.Measure defaultMeasure) {
146:                int size = basis.maximumSize(container, components, minMeasure,
147:                        prefMeasure, defaultMeasure);
148:                if (lowerBound != null) {
149:                    size = Math.max(size, lowerBound
150:                            .maximumSize(container, components, minMeasure,
151:                                    prefMeasure, defaultMeasure));
152:                }
153:                if (upperBound != null) {
154:                    size = Math.min(size, upperBound
155:                            .maximumSize(container, components, minMeasure,
156:                                    prefMeasure, defaultMeasure));
157:                }
158:                return size;
159:            }
160:
161:            /**
162:             * Describes if this Size can be compressed, if container space gets scarce.
163:             * Used by the FormLayout size computations in <code>#compressedSizes</code>
164:             * to check whether a column or row can be compressed or not.<p>
165:             * 
166:             * BoundedSizes are compressible if the base Size is compressible.
167:             * 
168:             * @return <code>true</code> if and only if the basis is compressible
169:             * 
170:             * @since 1.1
171:             */
172:            public boolean compressible() {
173:                return getBasis().compressible();
174:            }
175:
176:            // Overriding Object Behavior *******************************************
177:
178:            /**
179:             * Indicates whether some other BoundedSize is "equal to" this one.
180:             *
181:             * @param object   the object with which to compare
182:             * @return <code>true</code> if this object is the same as the object
183:             *     argument, <code>false</code> otherwise.
184:             * @see     Object#hashCode()
185:             * @see     java.util.Hashtable
186:             */
187:            public boolean equals(Object object) {
188:                if (this  == object)
189:                    return true;
190:                if (!(object instanceof  BoundedSize))
191:                    return false;
192:                BoundedSize size = (BoundedSize) object;
193:                return basis.equals(size.basis)
194:                        && ((lowerBound == null && size.lowerBound == null) || (lowerBound != null && lowerBound
195:                                .equals(size.lowerBound)))
196:                        && ((upperBound == null && size.upperBound == null) || (upperBound != null && upperBound
197:                                .equals(size.upperBound)));
198:            }
199:
200:            /**
201:             * Returns a hash code value for the object. This method is 
202:             * supported for the benefit of hashtables such as those provided by 
203:             * <code>java.util.Hashtable</code>. 
204:             * 
205:             * @return  a hash code value for this object.
206:             * @see     Object#equals(Object)
207:             * @see     java.util.Hashtable
208:             */
209:            public int hashCode() {
210:                int hashValue = basis.hashCode();
211:                if (lowerBound != null) {
212:                    hashValue = hashValue * 37 + lowerBound.hashCode();
213:                }
214:                if (upperBound != null) {
215:                    hashValue = hashValue * 37 + upperBound.hashCode();
216:                }
217:                return hashValue;
218:            }
219:
220:            /**
221:             * Returns a string representation of this size object.
222:             *
223:             * <strong>Note:</strong> The string representation may change
224:             * at any time. It is strongly recommended to not use this string
225:             * for parsing purposes.
226:             * 
227:             * @return  a string representation of the constant size
228:             */
229:            public String toString() {
230:                if (lowerBound != null) {
231:                    return upperBound == null ? "max(" + basis + ';'
232:                            + lowerBound + ')' : "max(" + lowerBound + ';'
233:                            + "min(" + basis + ';' + upperBound + "))";
234:                } else if (upperBound != null) {
235:                    return "min(" + basis + ';' + upperBound + ')';
236:                } else {
237:                    return "bounded(" + basis + ')';
238:                }
239:            }
240:
241:        }
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