Java tutorial
/*==========================================================================*\ | $Id: WCChartTheme.java,v 1.3 2010/09/26 16:24:50 stedwar2 Exp $ |*-------------------------------------------------------------------------*| | Copyright (C) 2010 Virginia Tech | | This file is part of Web-CAT. | | Web-CAT is free software; you can redistribute it and/or modify | it under the terms of the GNU Affero General Public License as published | by the Free Software Foundation; either version 3 of the License, or | (at your option) any later version. | | Web-CAT is distributed in the hope that it will be useful, | but WITHOUT ANY WARRANTY; without even the implied warranty of | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | GNU General Public License for more details. | | You should have received a copy of the GNU Affero General Public License | along with Web-CAT; if not, see <http://www.gnu.org/licenses/>. \*==========================================================================*/ package org.webcat.grader.graphs; import java.awt.Color; import java.awt.Font; import java.awt.Paint; import org.jfree.chart.StandardChartTheme; import org.jfree.chart.plot.DefaultDrawingSupplier; import org.jfree.chart.renderer.category.StandardBarPainter; import org.jfree.chart.renderer.xy.StandardXYBarPainter; import org.webcat.core.Theme; //------------------------------------------------------------------------- /** * A JFreeChart theme that pulls information about colors from a user's current * Web-CAT theme. * * @author Tony Allevato * @version $Id: WCChartTheme.java,v 1.3 2010/09/26 16:24:50 stedwar2 Exp $ */ public class WCChartTheme extends StandardChartTheme { //~ Constructors .......................................................... // ---------------------------------------------------------- /** * Initializes a new WCChartTheme, which is a JFreeChart theme that is * customized for Web-CAT and can eventually pull values directly from the * user's currently selected Web-CAT theme. * * @param theme the user's currently selected Web-CAT theme */ public WCChartTheme(Theme theme) { super("Web-CAT"); if (theme != null) { this.theme = theme; } else { this.theme = Theme.defaultTheme(); } // Use the font that we currently have as the default Web-CAT font. String fontName = defaultFontName(); setExtraLargeFont(new Font(fontName, Font.BOLD, 20)); setLargeFont(new Font(fontName, Font.BOLD, 14)); setRegularFont(new Font(fontName, Font.BOLD, 12)); setSmallFont(new Font(fontName, Font.BOLD, 10)); // Set the text color based on whether the theme is light or dark. Color textColor = textColor(); setAxisLabelPaint(textColor); setItemLabelPaint(textColor); setLegendItemPaint(textColor); setSubtitlePaint(textColor); setTickLabelPaint(textColor); setTitlePaint(textColor); // Make the background of the charts transparent. setPlotBackgroundPaint(new Color(144, 144, 144, 128)); Color transparent = new Color(0, 0, 0, 0); setChartBackgroundPaint(transparent); setLegendBackgroundPaint(transparent); // Kill the gradients that newer versions of JFreeChart add by default. setDrawingSupplier(new ThemeBasedDrawingSupplier()); setBarPainter(new StandardBarPainter()); setXYBarPainter(new StandardXYBarPainter()); } //~ Methods ............................................................... // ---------------------------------------------------------- /** * Gets the name of the font that should be used for titles and labels. * * @return the name of the title/label font */ protected String defaultFontName() { return "Trebuchet MS"; } // ---------------------------------------------------------- /** * Gets a small font appropriate to display numbers along axes. * * @return a small font */ public Font smallFont() { if (smallFont == null) { smallFont = new Font(defaultFontName(), Font.PLAIN, 10); } return smallFont; } // ---------------------------------------------------------- /** * Gets the text color to use for titles, labels, and axes. * * @return the text color */ public Color textColor() { return theme.isDark() ? textColorForDarkThemes : textColorForLightThemes; } //~ Static/instance variables ............................................. // ---------------------------------------------------------- /** * A drawing supplier that uses information from the user's currently * selected theme to choose appropriate fill and outline colors. */ private class ThemeBasedDrawingSupplier extends DefaultDrawingSupplier { // ---------------------------------------------------------- /** * Initializes a new instance of the ThemeBasedDrawingSupplier class. */ public ThemeBasedDrawingSupplier() { if (theme.isDark()) { outlinePaints = outlinePaintsForDarkThemes; barPaints = barPaintsForDarkThemes; } else { outlinePaints = outlinePaintsForLightThemes; barPaints = barPaintsForLightThemes; } } // ---------------------------------------------------------- public Paint getNextOutlinePaint() { Paint paint = outlinePaints[outlinePaintIndex % outlinePaints.length]; outlinePaintIndex++; return paint; } // ---------------------------------------------------------- public Paint getNextPaint() { Paint paint = barPaints[barPaintIndex % barPaints.length]; barPaintIndex++; return paint; } //~ Static/instance variables ......................................... private Paint[] outlinePaints; private Paint[] barPaints; private int outlinePaintIndex; private int barPaintIndex; private final Paint[] outlinePaintsForLightThemes = { new Color(15, 44, 15), // green new Color(75, 10, 15), // red new Color(13, 12, 41), // blue new Color(95, 95, 15), // yellow new Color(92, 42, 15), // orange new Color(17, 75, 75), // cyan }; private final Paint[] barPaintsForLightThemes = { new Color(32, 112, 32), // green new Color(192, 32, 32), // red new Color(32, 32, 112), // blue new Color(224, 224, 32), // yellow new Color(224, 112, 32), // orange new Color(32, 192, 192), // cyan }; private final Paint[] outlinePaintsForDarkThemes = { new Color(15, 96, 0), // green new Color(92, 0, 5), // red new Color(20, 48, 93), // blue new Color(105, 105, 15), // yellow new Color(92, 42, 15), // orange new Color(19, 94, 94), // cyan }; private final Paint[] barPaintsForDarkThemes = { new Color(0, 224, 0), // green new Color(224, 0, 0), // red new Color(48, 128, 224), // blue new Color(248, 248, 32), // yellow new Color(224, 112, 32), // orange new Color(32, 224, 224), // cyan }; } //~ Static/instance variables ............................................. private Theme theme; private Font smallFont; private static Color textColorForDarkThemes = new Color(224, 224, 224); private static Color textColorForLightThemes = new Color(24, 24, 24); }