    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jfreechart/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * --------------
    028     * DateTitle.java
    029     * --------------
    030     * (C) Copyright 2000-2007, by David Berry and Contributors.
    031     *
    032     * Original Author:  David Berry;
    033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034     *
    035     * Changes (from 18-Sep-2001)
    036     * --------------------------
    037     * 18-Sep-2001 : Added standard header (DG);
    038     * 09-Jan-2002 : Updated Javadoc comments (DG);
    039     * 07-Feb-2002 : Changed blank space around title from Insets --> Spacer, to
    040     *               allow for relative or absolute spacing (DG);
    041     * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG);
    042     * 31-Jan-2005 : Updated for changes to super class (DG);
    043     * ------------- JFREECHART 1.0.x ---------------------------------------------
    044     * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
    045     *
    046     */
    047
    048    package org.jfree.chart.title;
    049
    050    import java.awt.Color;
    051    import java.awt.Font;
    052    import java.awt.Paint;
    053    import java.io.Serializable;
    054    import java.text.DateFormat;
    055    import java.util.Date;
    056    import java.util.Locale;
    057
    058    import org.jfree.ui.HorizontalAlignment;
    059    import org.jfree.ui.RectangleEdge;
    060    import org.jfree.ui.RectangleInsets;
    061    import org.jfree.ui.VerticalAlignment;
    062
    063    /**
    064     * A chart title that displays the date.
    065     * <p>
    066     * Keep in mind that a chart can have several titles, and that they can appear
    067     * at the top, left, right or bottom of the chart - a <code>DateTitle</code>
    068     * will commonly appear at the bottom of a chart, although you can place it
    069     * anywhere.
    070     * <P>
    071     * By specifying the locale, dates are formatted to the correct standard for
    072     * the given locale. For example, a date would appear as "January 17, 2000" in
    073     * the US, but "17 January 2000" in most European locales.
    074     */
    075    public class DateTitle extends TextTitle implements Serializable {
    076
    077        /** For serialization. */
    078        private static final long serialVersionUID = -465434812763159881L;
    079
    080        /**
    081         * Creates a new chart title that displays the current date in the default
    082         * (LONG) format for the locale, positioned to the bottom right of the
    083         * chart.
    084         * <P>
    085         * The color will be black in 12 point, plain Helvetica font (maps to Arial
    086         * on Win32 systems without Helvetica).
    087         */
    088        public DateTitle() {
    089            this(DateFormat.LONG);
    090        }
    091
    092        /**
    093         * Creates a new chart title that displays the current date with the
    094         * specified style (for the default locale).
    095         * <P>
    096         * The date style should be one of:  <code>SHORT</code>,
    097         * <code>MEDIUM</code>, <code>LONG</code> or <code>FULL</code>
    098         * (defined in <code>java.util.DateFormat<code>).
    099         *
    100         * @param style  the date style.
    101         */
    102        public DateTitle(int style) {
    103            this(style, Locale.getDefault(), new Font("Dialog", Font.PLAIN, 12),
    104                    Color.black);
    105        }
    106
    107        /**
    108         * Creates a new chart title that displays the current date.
    109         * <p>
    110         * The date style should be one of:  <code>SHORT</code>,
    111         * <code>MEDIUM</code>, <code>LONG</code> or <code>FULL</code> (defined
    112         * in <code>java.util.DateFormat<code>).
    113         * <P>
    114         * For the locale, you can use <code>Locale.getDefault()</code> for the
    115         * default locale.
    116         *
    117         * @param style  the date style.
    118         * @param locale  the locale.
    119         * @param font  the font.
    120         * @param paint  the text color.
    121         */
    122        public DateTitle(int style, Locale locale, Font font, Paint paint) {
    123            this(style, locale, font, paint, RectangleEdge.BOTTOM,
    124                    HorizontalAlignment.RIGHT, VerticalAlignment.CENTER,
    125                    Title.DEFAULT_PADDING);
    126        }
    127
    128        /**
    129         * Creates a new chart title that displays the current date.
    130         * <p>
    131         * The date style should be one of:  <code>SHORT</code>,
    132         * <code>MEDIUM</code>, <code>LONG</code> or <code>FULL</code> (defined
    133         * in <code>java.util.DateFormat<code>).
    134         * <P>
    135         * For the locale, you can use <code>Locale.getDefault()</code> for the
    136         * default locale.
    137         *
    138         * @param style  the date style.
    139         * @param locale  the locale.
    140         * @param font  the font (not null).
    141         * @param paint  the text color (not null).
    142         * @param position  the relative location of this title (use constants in
    143         *                  Title).
    144         * @param horizontalAlignment  the horizontal text alignment of this title
    145         *                             (use constants in Title).
    146         * @param verticalAlignment  the vertical text alignment of this title (use
    147         *                           constants in Title).
    148         * @param padding  determines the blank space around the outside of the
    149         *                 title (not null).
    150         */
    151        public DateTitle(int style, Locale locale, Font font, Paint paint,
    152                         RectangleEdge position,
    153                         HorizontalAlignment horizontalAlignment,
    154                         VerticalAlignment verticalAlignment,
    155                         RectangleInsets padding) {
    156            super(DateFormat.getDateInstance(style, locale).format(new Date()),
    157                    font, paint, position, horizontalAlignment, verticalAlignment,
    158                    padding);
    159        }
    160
    161        /**
    162         * Set the format of the date.
    163         * <P>
    164         * The date style should be one of:  <code>SHORT</code>,
    165         * <code>MEDIUM</code>, <code>LONG</code> or <code>FULL</code> (defined
    166         * in <code>java.util.DateFormat<code>).
    167         * <P>
    168         * For the locale, you can use <code>Locale.getDefault()</code> for the
    169         * default locale.
    170         *
    171         * @param style  the date style.
    172         * @param locale  the locale.
    173         */
    174        public void setDateFormat(int style, Locale locale) {
    175            setText(DateFormat.getDateInstance(style, locale).format(new Date()));
    176        }
    177
    178    }