Java tutorial
/* * Copyright (C) 2000 - 2008 TagServlet Ltd * * This file is part of Open BlueDragon (OpenBD) CFML Server Engine. * * OpenBD is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * Free Software Foundation,version 3. * * OpenBD 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 General Public License * along with OpenBD. If not, see http://www.gnu.org/licenses/ * * Additional permission under GNU GPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or combining * it with any of the JARS listed in the README.txt (or a modified version of * (that library), containing parts covered by the terms of that JAR, the * licensors of this Program grant you additional permission to convey the * resulting work. * README.txt @ http://www.openbluedragon.org/license/README.txt * * http://www.openbluedragon.org/ */ package com.newatlanta.bluedragon; import java.awt.Font; import java.awt.GradientPaint; import java.awt.Graphics2D; import java.awt.Paint; import java.awt.Shape; import java.awt.Stroke; import java.awt.geom.Point2D; import java.awt.geom.Rectangle2D; import java.util.Vector; import org.jfree.chart.LegendItem; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.entity.EntityCollection; import org.jfree.chart.entity.XYItemEntity; import org.jfree.chart.labels.ItemLabelAnchor; import org.jfree.chart.labels.ItemLabelPosition; import org.jfree.chart.labels.XYItemLabelGenerator; import org.jfree.chart.labels.XYSeriesLabelGenerator; import org.jfree.chart.labels.XYToolTipGenerator; import org.jfree.chart.plot.CrosshairState; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.ClusteredXYBarRenderer; import org.jfree.chart.renderer.xy.XYItemRendererState; import org.jfree.data.xy.IntervalXYDataset; import org.jfree.data.xy.XYDataset; import org.jfree.text.TextUtilities; import org.jfree.ui.RectangleEdge; import com.naryx.tagfusion.cfm.tag.awt.cfCHART; public class CustomClusteredXYBarRenderer extends ClusteredXYBarRenderer implements CustomColorRenderer { private static final long serialVersionUID = 1L; /** The colors. */ private Vector colors = new Vector(); /** * Creates a new renderer. * * @param colors * the colors. */ public CustomClusteredXYBarRenderer(Paint[] colors) { this.colors.addElement(colors); } public void addColors(Paint[] colors) { this.colors.addElement(colors); } /** * Returns the paint for an item. Overrides the default behaviour inherited * from AbstractSeriesRenderer. * * @param row * the series. * @param column * the category. * * @return The item color. */ public Paint getItemPaint(int row, int column) { if (row >= this.colors.size()) return super.getItemPaint(row, column); Paint[] seriesColors = (Paint[]) this.colors.elementAt(row); if (seriesColors.length == 0) return super.getItemPaint(row, column); return seriesColors[column % seriesColors.length]; } /* * This method is exactly the same as the method in the superclass except that * it contains a fix for horizontal bar charts that have a margin. The fix is * highlighted with comments below. * * It was also necessary to comment out the reference to * this.centerBarAtStartValue since this member is private. With BlueDragon it * is always false so it is safe to comment it out. * * It was also necessary to change the parameters passed to drawItemLabel to * fix a problem with it. */ public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { IntervalXYDataset intervalDataset = (IntervalXYDataset) dataset; Paint seriesPaint = getItemPaint(series, item); double value0; double value1; if (getUseYInterval()) { value0 = intervalDataset.getStartYValue(series, item); value1 = intervalDataset.getEndYValue(series, item); } else { value0 = getBase(); value1 = intervalDataset.getYValue(series, item); } if (Double.isNaN(value0) || Double.isNaN(value1)) { return; } double translatedValue0 = rangeAxis.valueToJava2D(value0, dataArea, plot.getRangeAxisEdge()); double translatedValue1 = rangeAxis.valueToJava2D(value1, dataArea, plot.getRangeAxisEdge()); RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); double x1 = intervalDataset.getStartXValue(series, item); double translatedX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); double x2 = intervalDataset.getEndXValue(series, item); double translatedX2 = domainAxis.valueToJava2D(x2, dataArea, xAxisLocation); double translatedWidth = Math.max(1, Math.abs(translatedX2 - translatedX1)); double translatedHeight = Math.abs(translatedValue0 - translatedValue1); /* * With BlueDragon, this value is always false so it's safe to comment this * code out. if (this.centerBarAtStartValue) { translatedX1 -= * translatedWidth / 2; } */ PlotOrientation orientation = plot.getOrientation(); if (getMargin() > 0.0) { if (orientation == PlotOrientation.HORIZONTAL) { // BEGIN fix for horizontal bar charts that have a margin double cut = translatedWidth * getMargin(); translatedWidth = translatedWidth - cut; translatedX1 = translatedX1 - cut / 2; // END fix for horizontal bar charts that have a margin } else if (orientation == PlotOrientation.VERTICAL) { double cut = translatedWidth * getMargin(); translatedWidth = translatedWidth - cut; translatedX1 = translatedX1 + cut / 2; } } int numSeries = dataset.getSeriesCount(); double seriesBarWidth = translatedWidth / numSeries; Rectangle2D bar = null; if (orientation == PlotOrientation.HORIZONTAL) { bar = new Rectangle2D.Double(Math.min(translatedValue0, translatedValue1), translatedX1 - seriesBarWidth * (numSeries - series), translatedHeight, seriesBarWidth); } else if (orientation == PlotOrientation.VERTICAL) { bar = new Rectangle2D.Double(translatedX1 + seriesBarWidth * series, Math.min(translatedValue0, translatedValue1), seriesBarWidth, translatedHeight); } g2.setPaint(seriesPaint); g2.fill(bar); if (isDrawBarOutline() && Math.abs(translatedX2 - translatedX1) > 3) { g2.setStroke(getItemOutlineStroke(series, item)); g2.setPaint(getItemOutlinePaint(series, item)); g2.draw(bar); } // TODO: we need something better for the item labels if (isItemLabelVisible(series, item)) { // Change parameters passed to this method to call our local version drawItemLabel(g2, orientation, dataset, series, item, bar, value1 < 0.0); } // add an entity for the item... if (info != null) { EntityCollection entities = info.getOwner().getEntityCollection(); if (entities != null) { String tip = null; XYToolTipGenerator generator = getToolTipGenerator(series, item); if (generator != null) { tip = generator.generateToolTip(dataset, series, item); } String url = null; if (getURLGenerator() != null) { url = getURLGenerator().generateURL(dataset, series, item); } XYItemEntity entity = new XYItemEntity(bar, dataset, series, item, tip, url); entities.add(entity); } } } /* * This method follows the algorithm of the same method in * org.jfree.chart.renderer.category.BarRenderer except that for an inside * position it doesn't check if the label will fit inside the bar. Instead it * just always displays the label. */ private void drawItemLabel(Graphics2D g2, PlotOrientation orientation, XYDataset dataset, int series, int item, Rectangle2D bar, boolean negative) { XYItemLabelGenerator generator = getItemLabelGenerator(series, item); if (generator == null) return; String label = generator.generateLabel(dataset, series, item); if (label == null) { return; // nothing to do } Font labelFont = getItemLabelFont(series, item); g2.setFont(labelFont); Paint paint = getItemLabelPaint(series, item); g2.setPaint(paint); // find out where to place the label... ItemLabelPosition position = null; if (!negative) { position = getPositiveItemLabelPosition(series, item); } else { position = getNegativeItemLabelPosition(series, item); } // work out the label anchor point... Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar, orientation); TextUtilities.drawRotatedString(label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(), position.getTextAnchor(), position.getAngle(), position.getRotationAnchor()); } /* * This method was copied from org.jfree.chart.renderer.category.BarRenderer. */ private Point2D calculateLabelAnchorPoint(ItemLabelAnchor anchor, Rectangle2D bar, PlotOrientation orientation) { Point2D result = null; double offset = getItemLabelAnchorOffset(); double x0 = bar.getX() - offset; double x1 = bar.getX(); double x2 = bar.getX() + offset; double x3 = bar.getCenterX(); double x4 = bar.getMaxX() - offset; double x5 = bar.getMaxX(); double x6 = bar.getMaxX() + offset; double y0 = bar.getMaxY() + offset; double y1 = bar.getMaxY(); double y2 = bar.getMaxY() - offset; double y3 = bar.getCenterY(); double y4 = bar.getMinY() + offset; double y5 = bar.getMinY(); double y6 = bar.getMinY() - offset; if (anchor == ItemLabelAnchor.CENTER) { result = new Point2D.Double(x3, y3); } else if (anchor == ItemLabelAnchor.INSIDE1) { result = new Point2D.Double(x4, y4); } else if (anchor == ItemLabelAnchor.INSIDE2) { result = new Point2D.Double(x4, y4); } else if (anchor == ItemLabelAnchor.INSIDE3) { result = new Point2D.Double(x4, y3); } else if (anchor == ItemLabelAnchor.INSIDE4) { result = new Point2D.Double(x4, y2); } else if (anchor == ItemLabelAnchor.INSIDE5) { result = new Point2D.Double(x4, y2); } else if (anchor == ItemLabelAnchor.INSIDE6) { result = new Point2D.Double(x3, y2); } else if (anchor == ItemLabelAnchor.INSIDE7) { result = new Point2D.Double(x2, y2); } else if (anchor == ItemLabelAnchor.INSIDE8) { result = new Point2D.Double(x2, y2); } else if (anchor == ItemLabelAnchor.INSIDE9) { result = new Point2D.Double(x2, y3); } else if (anchor == ItemLabelAnchor.INSIDE10) { result = new Point2D.Double(x2, y4); } else if (anchor == ItemLabelAnchor.INSIDE11) { result = new Point2D.Double(x2, y4); } else if (anchor == ItemLabelAnchor.INSIDE12) { result = new Point2D.Double(x3, y4); } else if (anchor == ItemLabelAnchor.OUTSIDE1) { result = new Point2D.Double(x5, y6); } else if (anchor == ItemLabelAnchor.OUTSIDE2) { result = new Point2D.Double(x6, y5); } else if (anchor == ItemLabelAnchor.OUTSIDE3) { result = new Point2D.Double(x6, y3); } else if (anchor == ItemLabelAnchor.OUTSIDE4) { result = new Point2D.Double(x6, y1); } else if (anchor == ItemLabelAnchor.OUTSIDE5) { result = new Point2D.Double(x5, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE6) { result = new Point2D.Double(x3, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE7) { result = new Point2D.Double(x1, y0); } else if (anchor == ItemLabelAnchor.OUTSIDE8) { result = new Point2D.Double(x0, y1); } else if (anchor == ItemLabelAnchor.OUTSIDE9) { result = new Point2D.Double(x0, y3); } else if (anchor == ItemLabelAnchor.OUTSIDE10) { result = new Point2D.Double(x0, y5); } else if (anchor == ItemLabelAnchor.OUTSIDE11) { result = new Point2D.Double(x1, y6); } else if (anchor == ItemLabelAnchor.OUTSIDE12) { result = new Point2D.Double(x3, y6); } return result; } /** * Returns a default legend item for the specified series. Subclasses should * override this method to generate customised items. * * @param datasetIndex * the dataset index (zero-based). * @param series * the series index (zero-based). * * @return A legend item for the series. */ public LegendItem getLegendItem(int datasetIndex, int series) { LegendItem result = null; XYPlot xyplot = getPlot(); if (xyplot != null) { XYDataset dataset = xyplot.getDataset(datasetIndex); if (dataset != null) { XYSeriesLabelGenerator lg = getLegendItemLabelGenerator(); String label = lg.generateLabel(dataset, series); String description = label; String toolTipText = null; if (getLegendItemToolTipGenerator() != null) { toolTipText = getLegendItemToolTipGenerator().generateLabel(dataset, series); } String urlText = null; if (getLegendItemURLGenerator() != null) { urlText = getLegendItemURLGenerator().generateLabel(dataset, series); } Shape shape = getLegendBar(); Paint paint = getSeriesPaint(series); Paint outlinePaint = getSeriesOutlinePaint(series); Stroke outlineStroke = getSeriesOutlineStroke(series); // This is the fix for bug #2695 if (paint instanceof java.awt.GradientPaint) { // When the paintstyle is "shade" use the lighter // color while with "light" use the darker color // NOTE: if we take the lighter color (Color2) and make it darker // and it equals the darker color (Color1) then the paintstyle // is "shade". GradientPaint gp = ((GradientPaint) paint); if (cfCHART.getDarkerColor(gp.getColor2()).equals(gp.getColor1())) paint = gp.getColor2(); // the lighter color else paint = gp.getColor1(); // the darker color } result = new LegendItem(label, description, toolTipText, urlText, shape, paint, outlineStroke, outlinePaint); } } return result; } }