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Java > Open Source Codes > org > apache > fop > datatypes > TableColLength


1 /*
2  * $Id: TableColLength.java,v 1.4.2.1 2003/02/25 10:48:28 jeremias Exp $
3  * ============================================================================
4  * The Apache Software License, Version 1.1
5  * ============================================================================
6  *
7  * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without modifica-
10  * tion, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * 3. The end-user documentation included with the redistribution, if any, must
20  * include the following acknowledgment: "This product includes software
21  * developed by the Apache Software Foundation (http://www.apache.org/)."
22  * Alternately, this acknowledgment may appear in the software itself, if
23  * and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * apache@apache.org.
29  *
30  * 5. Products derived from this software may not be called "Apache", nor may
31  * "Apache" appear in their name, without prior written permission of the
32  * Apache Software Foundation.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44  * ============================================================================
45  *
46  * This software consists of voluntary contributions made by many individuals
47  * on behalf of the Apache Software Foundation and was originally created by
48  * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49  * Software Foundation, please see <http://www.apache.org/>.
50  */
51 package org.apache.fop.datatypes;
52
53 import org.apache.fop.fo.expr.Numeric;
54
55 /**
56  * A table-column width specification, possibly including some
57  * number of proportional "column-units". The absolute size of a
58  * column-unit depends on the fixed and proportional sizes of all
59  * columns in the table, and on the overall size of the table.
60  * It can't be calculated until all columns have been specified and until
61  * the actual width of the table is known. Since this can be specified
62  * as a percent of its parent containing width, the calculation is done
63  * during layout.
64  * NOTE: this is only supposed to be allowed if table-layout=fixed.
65  */
66 public class TableColLength extends Length {
67
68     /**
69      * Number of table-column proportional units
70      */
71     double tcolUnits;
72
73     /**
74      * Construct an object with tcolUnits of proportional measure.
75      */
76     public TableColLength(double tcolUnits) {
77         this.tcolUnits = tcolUnits;
78     }
79
80
81
82     /**
83      * Override the method in Length to return the number of specified
84      * proportional table-column units.
85      */
86     public double getTableUnits() {
87         return tcolUnits;
88     }
89
90     /**
91      * Calculate the number of millipoints and set it.
92      */
93     public void resolveTableUnit(double mpointsPerUnit) {
94         setComputedValue((int)(tcolUnits * mpointsPerUnit));
95     }
96
97 //If the table-unit can be resolved, set the computed value
98 // protected void computeValue() {
99 // if (tblUnitBase.canResolveUnit()) {
100 // rslt += (int)(tcolUnits * (double)tblUnitBase.getUnitValue());
101 // setComputedValue(rslt);
102 // }
103 // }
104
105
106     public String JavaDoc toString() {
107         return (Double.toString(tcolUnits) + " table-column-units");
108     }
109
110     public Numeric asNumeric() {
111         return new Numeric(this);
112     }
113 }
114
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