Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/exports/ChartGenerator.java @ 8697:527e0f4c28c1
(issue1670) There is no point in refilling half of the gaps.
author | Tom Gottfried <tom@intevation.de> |
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date | Mon, 20 Apr 2015 15:03:02 +0200 |
parents | 6dfc3a1fc70d |
children | 5e38e2924c07 |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.exports; import org.dive4elements.artifactdatabase.state.ArtifactAndFacet; import org.dive4elements.artifactdatabase.state.Settings; import org.dive4elements.artifacts.Artifact; import org.dive4elements.artifacts.ArtifactNamespaceContext; import org.dive4elements.artifacts.CallContext; import org.dive4elements.artifacts.CallMeta; import org.dive4elements.artifacts.PreferredLocale; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.river.artifacts.access.RiverAccess; import org.dive4elements.river.artifacts.access.RangeAccess; import org.dive4elements.river.artifacts.D4EArtifact; import org.dive4elements.river.artifacts.resources.Resources; import org.dive4elements.river.collections.D4EArtifactCollection; import org.dive4elements.river.jfree.Bounds; import org.dive4elements.river.jfree.DoubleBounds; import org.dive4elements.river.jfree.EnhancedLineAndShapeRenderer; import org.dive4elements.river.jfree.RiverAnnotation; import org.dive4elements.river.jfree.StableXYDifferenceRenderer; import org.dive4elements.river.jfree.Style; import org.dive4elements.river.jfree.StyledAreaSeriesCollection; import org.dive4elements.river.jfree.StyledSeries; import org.dive4elements.river.jfree.AxisDataset; import org.dive4elements.river.themes.ThemeDocument; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.Paint; import java.awt.Stroke; import java.awt.TexturePaint; import java.awt.geom.Rectangle2D; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import java.util.Locale; import java.util.Map; import java.util.SortedMap; import java.util.TreeMap; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.jfree.chart.JFreeChart; import org.jfree.chart.LegendItem; import org.jfree.chart.LegendItemCollection; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.chart.title.TextTitle; import org.jfree.data.Range; import org.jfree.data.general.Series; import org.jfree.data.xy.XYDataset; import org.jfree.ui.RectangleInsets; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.dive4elements.river.utils.Formatter; /** * The base class for chart creation. It should provide some basic things that * equal in all chart types. * * Annotations are added as RiverAnnotations and come in mutliple basic forms: * TextAnnotations are labels somewhere in data space, StickyAnnotations are * labels of a slice or line in one data dimension (i.e. visualized as label * on a single axis). * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public abstract class ChartGenerator implements OutGenerator { private static Logger log = Logger.getLogger(ChartGenerator.class); public static final int DEFAULT_CHART_WIDTH = 600; public static final int DEFAULT_CHART_HEIGHT = 400; public static final String DEFAULT_CHART_FORMAT = "png"; public static final Color DEFAULT_GRID_COLOR = Color.GRAY; public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f; public static final int DEFAULT_FONT_SIZE = 12; public static final String DEFAULT_FONT_NAME = "Tahoma"; protected static float ANNOTATIONS_AXIS_OFFSET = 0.02f; public static final String XPATH_CHART_SIZE = "/art:action/art:attributes/art:size"; public static final String XPATH_CHART_FORMAT = "/art:action/art:attributes/art:format/@art:value"; public static final String XPATH_CHART_X_RANGE = "/art:action/art:attributes/art:xrange"; public static final String XPATH_CHART_Y_RANGE = "/art:action/art:attributes/art:yrange"; /** The document of the incoming out() request.*/ protected Document request; /** The output stream where the data should be written to.*/ protected OutputStream out; /** The CallContext object.*/ protected CallContext context; protected D4EArtifactCollection collection; /** The artifact that is used to decorate the chart with meta information.*/ protected Artifact master; /** The settings that should be used during output creation.*/ protected Settings settings; /** Map of datasets ("index"). */ protected SortedMap<Integer, AxisDataset> datasets; /** List of annotations to insert in plot. */ protected List<RiverAnnotation> annotations = new ArrayList<RiverAnnotation>(); protected String outName; /** * A mini interface that allows to walk over the YAXIS enums defined in * subclasses. */ public interface YAxisWalker { int length(); String getId(int idx); } // end of YAxisWalker interface /** * Default constructor that initializes internal data structures. */ public ChartGenerator() { datasets = new TreeMap<Integer, AxisDataset>(); } @Override public void setup(Object config) { log.debug("ChartGenerator.setup"); } /** * Adds annotations to list. The given annotation will be visible. */ public void addAnnotations(RiverAnnotation annotation) { annotations.add(annotation); } /** * This method needs to be implemented by concrete subclasses to create new * instances of JFreeChart. * * @return a new instance of a JFreeChart. */ public abstract JFreeChart generateChart(); /** For every outable (i.e. facets), this function is * called and handles the data accordingly. */ @Override public abstract void doOut( ArtifactAndFacet bundle, ThemeDocument attr, boolean visible); protected abstract YAxisWalker getYAxisWalker(); protected abstract Series getSeriesOf(XYDataset dataset, int idx); /** * Returns the default title of a chart. * * @return the default title of a chart. */ protected abstract String getDefaultChartTitle(); /** * Returns the default X-Axis label of a chart. * * @return the default X-Axis label of a chart. */ protected abstract String getDefaultXAxisLabel(); /** * This method is called to retrieve the default label for an Y axis at * position <i>pos</i>. * * @param pos The position of an Y axis. * * @return the default Y axis label at position <i>pos</i>. */ protected abstract String getDefaultYAxisLabel(int pos); /** * This method is used to create new AxisDataset instances which may differ * in concrete subclasses. * * @param idx The index of an axis. */ protected abstract AxisDataset createAxisDataset(int idx); /** * Combines the ranges of the X axis at index <i>idx</i>. * * @param bounds A new Bounds. * @param idx The index of the X axis that should be comined with * <i>range</i>. */ protected abstract void combineXBounds(Bounds bounds, int idx); /** * Combines the ranges of the Y axis at index <i>idx</i>. * * @param bounds A new Bounds. * @param index The index of the Y axis that should be comined with. * <i>range</i>. */ protected abstract void combineYBounds(Bounds bounds, int index); /** * This method is used to determine the ranges for axes at a given index. * * @param index The index of the axes at the plot. * * @return a Range[] with [xrange, yrange]; */ public abstract Range[] getRangesForAxis(int index); public abstract Bounds getXBounds(int axis); protected abstract void setXBounds(int axis, Bounds bounds); public abstract Bounds getYBounds(int axis); protected abstract void setYBounds(int axis, Bounds bounds); /** * This method retrieves the chart subtitle by calling getChartSubtitle() * and adds it as TextTitle to the chart. * The default implementation of getChartSubtitle() returns the same * as getDefaultChartSubtitle() which must be implemented by derived * classes. If you want to add multiple subtitles to the chart override * this method and add your subtitles manually. * * @param chart The JFreeChart chart object. */ protected void addSubtitles(JFreeChart chart) { String subtitle = getChartSubtitle(); if (subtitle != null && subtitle.length() > 0) { chart.addSubtitle(new TextTitle(subtitle)); } } /** * Register annotations like MainValues for later plotting * * @param annotations list of annotations (data of facet). * @param aandf Artifact and the facet. * @param theme Theme document for given annotations. * @param visible The visibility of the annotations. */ public void doAnnotations( RiverAnnotation annotations, ArtifactAndFacet aandf, ThemeDocument theme, boolean visible ){ log.debug("doAnnotations"); // Add all annotations to our annotation pool. annotations.setTheme(theme); if (aandf != null) { annotations.setLabel(aandf.getFacetDescription()); } else { log.error( "Art/Facet for Annotations is null. " + "This should never happen!"); } if (visible) { addAnnotations(annotations); } } /** * Generate chart. */ @Override public void generate() throws IOException { log.debug("ChartGenerator.generate"); JFreeChart chart = generateChart(); String format = getFormat(); int[] size = getSize(); if (size == null) { size = getExportDimension(); } context.putContextValue("chart.width", size[0]); context.putContextValue("chart.height", size[1]); if (format.equals(ChartExportHelper.FORMAT_PNG)) { context.putContextValue("chart.image.format", "png"); ChartExportHelper.exportImage( out, chart, context); } else if (format.equals(ChartExportHelper.FORMAT_PDF)) { preparePDFContext(context); ChartExportHelper.exportPDF( out, chart, context); } else if (format.equals(ChartExportHelper.FORMAT_SVG)) { prepareSVGContext(context); ChartExportHelper.exportSVG( out, chart, context); } else if (format.equals(ChartExportHelper.FORMAT_CSV)) { context.putContextValue("chart.image.format", "csv"); ChartExportHelper.exportCSV( out, chart, context); } } @Override public void init(String outName, Document request, OutputStream out, CallContext context) { log.debug("ChartGenerator.init"); this.outName = outName; this.request = request; this.out = out; this.context = context; } /** Sets the master artifact. */ @Override public void setMasterArtifact(Artifact master) { this.master = master; } /** * Gets the master artifact. * @return the master artifact. */ public Artifact getMaster() { return master; } /** Sets the collection. */ @Override public void setCollection(D4EArtifactCollection collection) { this.collection = collection; } @Override public void setSettings(Settings settings) { this.settings = settings; } /** * Returns an instance of <i>ChartSettings</i> with a chart specific section * but with no axes settings. * * @return an instance of <i>ChartSettings</i>. */ @Override public Settings getSettings() { if (this.settings != null) { return this.settings; } ChartSettings settings = new ChartSettings(); ChartSection chartSection = buildChartSection(); LegendSection legendSection = buildLegendSection(); ExportSection exportSection = buildExportSection(); settings.setChartSection(chartSection); settings.setLegendSection(legendSection); settings.setExportSection(exportSection); List<AxisSection> axisSections = buildAxisSections(); for (AxisSection axisSection: axisSections) { settings.addAxisSection(axisSection); } return settings; } /** * Creates a new <i>ChartSection</i>. * * @return a new <i>ChartSection</i>. */ protected ChartSection buildChartSection() { ChartSection chartSection = new ChartSection(); chartSection.setTitle(getChartTitle()); chartSection.setSubtitle(getChartSubtitle()); chartSection.setDisplayGrid(isGridVisible()); chartSection.setDisplayLogo(showLogo()); chartSection.setLogoVPlacement(logoVPlace()); chartSection.setLogoHPlacement(logoHPlace()); return chartSection; } /** * Creates a new <i>LegendSection</i>. * * @return a new <i>LegendSection</i>. */ protected LegendSection buildLegendSection() { LegendSection legendSection = new LegendSection(); legendSection.setVisibility(isLegendVisible()); legendSection.setFontSize(getLegendFontSize()); legendSection.setAggregationThreshold(10); return legendSection; } /** * Creates a new <i>ExportSection</i> with default values <b>WIDTH=600</b> * and <b>HEIGHT=400</b>. * * @return a new <i>ExportSection</i>. */ protected ExportSection buildExportSection() { ExportSection exportSection = new ExportSection(); exportSection.setWidth(600); exportSection.setHeight(400); return exportSection; } /** * Creates a list of Sections that contains all axes of the chart (including * X and Y axes). * * @return a list of Sections for each axis in this chart. */ protected List<AxisSection> buildAxisSections() { List<AxisSection> axisSections = new ArrayList<AxisSection>(); axisSections.addAll(buildXAxisSections()); axisSections.addAll(buildYAxisSections()); return axisSections; } /** * Creates a new Section for chart's X axis. * * @return a List that contains a Section for the X axis. */ protected List<AxisSection> buildXAxisSections() { List<AxisSection> axisSections = new ArrayList<AxisSection>(); String identifier = "X"; AxisSection axisSection = new AxisSection(); axisSection.setIdentifier(identifier); axisSection.setLabel(getXAxisLabel()); axisSection.setFontSize(14); axisSection.setFixed(false); // XXX We are able to find better default ranges that [0,0], but the Y // axes currently have no better ranges set. axisSection.setUpperRange(0d); axisSection.setLowerRange(0d); axisSections.add(axisSection); return axisSections; } /** * Creates a list of Section for the chart's Y axes. This method makes use * of <i>getYAxisWalker</i> to be able to access all Y axes defined in * subclasses. * * @return a list of Y axis sections. */ protected List<AxisSection> buildYAxisSections() { List<AxisSection> axisSections = new ArrayList<AxisSection>(); YAxisWalker walker = getYAxisWalker(); for (int i = 0, n = walker.length(); i < n; i++) { AxisSection ySection = new AxisSection(); ySection.setIdentifier(walker.getId(i)); ySection.setLabel(getYAxisLabel(i)); ySection.setFontSize(14); ySection.setFixed(false); // XXX We are able to find better default ranges that [0,0], the // only problem is, that we do NOT have a better range than [0,0] // for each axis, because the initial chart will not have a dataset // for each axis set! ySection.setUpperRange(0d); ySection.setLowerRange(0d); axisSections.add(ySection); } return axisSections; } /** * Returns the <i>settings</i> as <i>ChartSettings</i>. * * @return the <i>settings</i> as <i>ChartSettings</i> or null, if * <i>settings</i> is not an instance of <i>ChartSettings</i>. */ public ChartSettings getChartSettings() { if (settings instanceof ChartSettings) { return (ChartSettings) settings; } return null; } /** * Returns the chart title provided by <i>settings</i>. * * @param settings A ChartSettings object. * * @return the title provided by <i>settings</i> or null if no * <i>ChartSection</i> is provided by <i>settings</i>. * * @throws NullPointerException if <i>settings</i> is null. */ public String getChartTitle(ChartSettings settings) { ChartSection cs = settings.getChartSection(); return cs != null ? cs.getTitle() : null; } /** * Returns the chart subtitle provided by <i>settings</i>. * * @param settings A ChartSettings object. * * @return the subtitle provided by <i>settings</i> or null if no * <i>ChartSection</i> is provided by <i>settings</i>. * * @throws NullPointerException if <i>settings</i> is null. */ public String getChartSubtitle(ChartSettings settings) { ChartSection cs = settings.getChartSection(); return cs != null ? cs.getSubtitle() : null; } /** * Returns a boolean object that determines if the chart grid should be * visible or not. This information needs to be provided by <i>settings</i>, * otherweise the default is true. * * @param settings A ChartSettings object. * * @return true, if the chart grid should be visible otherwise false. * * @throws NullPointerException if <i>settings</i> is null. */ public boolean isGridVisible(ChartSettings settings) { ChartSection cs = settings.getChartSection(); Boolean displayGrid = cs.getDisplayGrid(); return displayGrid != null ? displayGrid : true; } /** * Returns a boolean object that determines if the chart legend should be * visible or not. This information needs to be provided by <i>settings</i>, * otherwise the default is true. * * @param settings A ChartSettings object. * * @return true, if the chart legend should be visible otherwise false. * * @throws NullPointerException if <i>settings</i> is null. */ public boolean isLegendVisible(ChartSettings settings) { LegendSection ls = settings.getLegendSection(); Boolean displayLegend = ls.getVisibility(); return displayLegend != null ? displayLegend : true; } /** * Returns the legend font size specified in <i>settings</i> or null if no * <i>LegendSection</i> is provided by <i>settings</i>. * * @param settings A ChartSettings object. * * @return the legend font size or null. * * @throws NullPointerException if <i>settings</i> is null. */ public Integer getLegendFontSize(ChartSettings settings) { LegendSection ls = settings.getLegendSection(); return ls != null ? ls.getFontSize() : null; } /** * Returns the title of a chart. The return value depends on the existence * of ChartSettings: if there are ChartSettings set, this method returns the * chart title provided by those settings. Otherwise, this method returns * getDefaultChartTitle(). * * @return the title of a chart. */ protected String getChartTitle() { ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { return getChartTitle(chartSettings); } return getDefaultChartTitle(); } /** * Returns the subtitle of a chart. The return value depends on the * existence of ChartSettings: if there are ChartSettings set, this method * returns the chart title provided by those settings. Otherwise, this * method returns getDefaultChartSubtitle(). * * @return the subtitle of a chart. */ protected String getChartSubtitle() { ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { return getChartSubtitle(chartSettings); } return getDefaultChartSubtitle(); } /** * This method always returns null. Override it in subclasses that require * subtitles. * * @return null. */ protected String getDefaultChartSubtitle() { // Override this method in subclasses return null; } /** * This method is used to determine, if the chart's legend is visible or * not. If a <i>settings</i> instance is set, this instance determines the * visibility otherwise, this method returns true as default if no * <i>settings</i> is set. * * @return true, if the legend should be visible, otherwise false. */ protected boolean isLegendVisible() { ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { return isLegendVisible(chartSettings); } return true; } /** Where to place the logo. */ protected String logoHPlace() { ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { ChartSection cs = chartSettings.getChartSection(); String place = cs.getLogoHPlacement(); return place; } return "center"; } /** Where to place the logo. */ protected String logoVPlace() { ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { ChartSection cs = chartSettings.getChartSection(); String place = cs.getLogoVPlacement(); return place; } return "top"; } /** Return the logo id from settings. */ protected String showLogo(ChartSettings chartSettings) { if (chartSettings != null) { ChartSection cs = chartSettings.getChartSection(); String logo = cs.getDisplayLogo(); return logo; } return "none"; } /** * This method is used to determine if a logo should be added to the plot. * * @return logo name (null if none). */ protected String showLogo() { ChartSettings chartSettings = getChartSettings(); return showLogo(chartSettings); } /** * This method is used to determine the font size of the chart's legend. If * a <i>settings</i> instance is set, this instance determines the font * size, otherwise this method returns 12 as default if no <i>settings</i> * is set or if it doesn't provide a legend font size. * * @return a legend font size. */ protected int getLegendFontSize() { Integer fontSize = null; ChartSettings chartSettings = getChartSettings(); if (chartSettings != null) { fontSize = getLegendFontSize(chartSettings); } return fontSize != null ? fontSize : DEFAULT_FONT_SIZE; } /** * This method is used to determine if the resulting chart should display * grid lines or not. <b>Note: this method always returns true!</b> * * @return true, if the chart should display grid lines, otherwise false. */ protected boolean isGridVisible() { return true; } /** * Returns the X-Axis label of a chart. * * @return the X-Axis label of a chart. */ protected String getXAxisLabel() { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return getDefaultXAxisLabel(); } AxisSection as = chartSettings.getAxisSection("X"); if (as != null) { String label = as.getLabel(); if (label != null) { return label; } } return getDefaultXAxisLabel(); } /** * This method returns the font size for the X axis. If the font size is * specified in ChartSettings (if <i>chartSettings</i> is set), this size is * returned. Otherwise the default font size 12 is returned. * * @return the font size for the x axis. */ protected int getXAxisLabelFontSize() { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return DEFAULT_FONT_SIZE; } AxisSection as = chartSettings.getAxisSection("X"); Integer fontSize = as.getFontSize(); return fontSize != null ? fontSize : DEFAULT_FONT_SIZE; } /** * This method returns the font size for an Y axis. If the font size is * specified in ChartSettings (if <i>chartSettings</i> is set), this size is * returned. Otherwise the default font size 12 is returned. * * @return the font size for the x axis. */ protected int getYAxisFontSize(int pos) { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return DEFAULT_FONT_SIZE; } YAxisWalker walker = getYAxisWalker(); AxisSection as = chartSettings.getAxisSection(walker.getId(pos)); if (as == null) { return DEFAULT_FONT_SIZE; } Integer fontSize = as.getFontSize(); return fontSize != null ? fontSize : DEFAULT_FONT_SIZE; } /** * This method returns the export dimension specified in ChartSettings as * int array [width,height]. * * @return an int array with [width,height]. */ protected int[] getExportDimension() { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return new int[] { 600, 400 }; } ExportSection export = chartSettings.getExportSection(); Integer width = export.getWidth(); Integer height = export.getHeight(); if (width != null && height != null) { return new int[] { width, height }; } return new int[] { 600, 400 }; } /** * Returns the Y-Axis label of a chart at position <i>pos</i>. * * @return the Y-Axis label of a chart at position <i>0</i>. */ protected String getYAxisLabel(int pos) { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return getDefaultYAxisLabel(pos); } YAxisWalker walker = getYAxisWalker(); AxisSection as = chartSettings.getAxisSection(walker.getId(pos)); if (as != null) { String label = as.getLabel(); if (label != null) { return label; } } return getDefaultYAxisLabel(pos); } /** * This method searches for a specific axis in the <i>settings</i> if * <i>settings</i> is set. If the axis was found, this method returns the * specified axis range if the axis range is fixed. Otherwise, this method * returns null. * * @param axisId The identifier of an axis. * * @return the specified axis range from <i>settings</i> if the axis is * fixed, otherwise null. */ public Range getRangeForAxisFromSettings(String axisId) { ChartSettings chartSettings = getChartSettings(); if (chartSettings == null) { return null; } AxisSection as = chartSettings.getAxisSection(axisId); if (as == null) { return null; } Boolean fixed = as.isFixed(); if (fixed != null && fixed) { /* Only time series charts have time ranges so prefer those. */ if (axisId.equals("X")) { Long lowerTime = as.getLowerTimeRange(); Long upperTime = as.getUpperTimeRange(); if ( lowerTime != null && upperTime != null ) { log.debug("Using time range: " + lowerTime + " - " + upperTime); return lowerTime < upperTime ? new Range(lowerTime, upperTime) : new Range(upperTime, lowerTime); } } Double upper = as.getUpperRange(); Double lower = as.getLowerRange(); if (upper != null && lower != null) { return lower < upper ? new Range(lower, upper) : new Range(upper, lower); } } return null; } /** * Adds a new AxisDataset which contains <i>dataset</i> at index <i>idx</i>. * * @param dataset An XYDataset. * @param idx The axis index. * @param visible Determines, if the dataset should be visible or not. */ public void addAxisDataset(XYDataset dataset, int idx, boolean visible) { if (dataset == null || idx < 0) { return; } AxisDataset axisDataset = getAxisDataset(idx); Bounds[] xyBounds = ChartHelper.getBounds(dataset); if (xyBounds == null) { log.warn("Skip XYDataset for Axis (invalid ranges): " + idx); return; } if (visible) { if (log.isDebugEnabled()) { log.debug("Add new AxisDataset at index: " + idx); log.debug("X extent: " + xyBounds[0]); log.debug("Y extent: " + xyBounds[1]); } axisDataset.addDataset(dataset); } combineXBounds(xyBounds[0], 0); combineYBounds(xyBounds[1], idx); } /** * This method grants access to the AxisDatasets stored in <i>datasets</i>. * If no AxisDataset exists for index <i>idx</i>, a new AxisDataset is * created using <i>createAxisDataset()</i>. * * @param idx The index of the desired AxisDataset. * * @return an existing or new AxisDataset. */ public AxisDataset getAxisDataset(int idx) { AxisDataset axisDataset = datasets.get(idx); if (axisDataset == null) { axisDataset = createAxisDataset(idx); datasets.put(idx, axisDataset); } return axisDataset; } /** * Adjust some Stroke/Grid parameters for <i>plot</i>. The chart * <i>Settings</i> are applied in this method. * * @param plot The XYPlot which is adapted. */ protected void adjustPlot(XYPlot plot) { Stroke gridStroke = new BasicStroke( DEFAULT_GRID_LINE_WIDTH, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 3.0f, new float[] { 3.0f }, 0.0f); ChartSettings cs = getChartSettings(); boolean isGridVisible = cs != null ? isGridVisible(cs) : true; plot.setDomainGridlineStroke(gridStroke); plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR); plot.setDomainGridlinesVisible(isGridVisible); plot.setRangeGridlineStroke(gridStroke); plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR); plot.setRangeGridlinesVisible(isGridVisible); plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d)); } /** * This helper mehtod is used to extract the current locale from instance * vairable <i>context</i>. * * @return the current locale. */ protected Locale getLocale() { CallMeta meta = context.getMeta(); PreferredLocale[] prefs = meta.getLanguages(); int len = prefs != null ? prefs.length : 0; Locale[] locales = new Locale[len]; for (int i = 0; i < len; i++) { locales[i] = prefs[i].getLocale(); } return meta.getPreferredLocale(locales); } /** * Look up \param key in i18n dictionary. * @param key key for which to find i18nd version. * @param def default, returned if lookup failed. * @return value found in i18n dictionary, \param def if no value found. */ protected String msg(String key, String def) { return Resources.getMsg(context.getMeta(), key, def); } /** * Look up \param key in i18n dictionary. * @param key key for which to find i18nd version. * @return value found in i18n dictionary, key itself if failed. */ protected String msg(String key) { return Resources.getMsg(context.getMeta(), key, key); } protected String msg(String key, Object[] args) { return Resources.getMsg(context.getMeta(), key, key, args); } protected String msg(String key, String def, Object[] args) { return Resources.getMsg(context.getMeta(), key, def, args); } protected String getRiverName() { return new RiverAccess((D4EArtifact)master).getRiver().getName(); } protected String getRiverUnit() { return new RiverAccess((D4EArtifact)master).getRiver() .getWstUnit().getName(); } protected double[] getRange() { D4EArtifact flys = (D4EArtifact) master; RangeAccess rangeAccess = new RangeAccess(flys); return rangeAccess.getKmRange(); } /** * Returns the size of a chart export as array which has been specified by * the incoming request document. * * @return the size of a chart as [width, height] or null if no width or * height are given in the request document. */ protected int[] getSize() { int[] size = new int[2]; Element sizeEl = (Element)XMLUtils.xpath( request, XPATH_CHART_SIZE, XPathConstants.NODE, ArtifactNamespaceContext.INSTANCE); if (sizeEl != null) { String uri = ArtifactNamespaceContext.NAMESPACE_URI; String w = sizeEl.getAttributeNS(uri, "width"); String h = sizeEl.getAttributeNS(uri, "height"); if (w.length() > 0 && h.length() > 0) { try { size[0] = Integer.parseInt(w); size[1] = Integer.parseInt(h); } catch (NumberFormatException nfe) { log.warn("Wrong values for chart width/height."); } } } return size[0] > 0 && size[1] > 0 ? size : null; } /** * This method returns the format specified in the <i>request</i> document * or <i>DEFAULT_CHART_FORMAT</i> if no format is specified in * <i>request</i>. * * @return the format used to export this chart. */ protected String getFormat() { String format = (String) XMLUtils.xpath( request, XPATH_CHART_FORMAT, XPathConstants.STRING, ArtifactNamespaceContext.INSTANCE); return format == null || format.length() == 0 ? DEFAULT_CHART_FORMAT : format; } /** * Returns the X-Axis range as String array from request document. * If the (x|y)range elements are not found in request document, return * null (i.e. not zoomed). * * @return a String array with [lower, upper], null if not in document. */ protected String[] getDomainAxisRangeFromRequest() { Element xrange = (Element)XMLUtils.xpath( request, XPATH_CHART_X_RANGE, XPathConstants.NODE, ArtifactNamespaceContext.INSTANCE); if (xrange == null) { return null; } String uri = ArtifactNamespaceContext.NAMESPACE_URI; String lower = xrange.getAttributeNS(uri, "from"); String upper = xrange.getAttributeNS(uri, "to"); return new String[] { lower, upper }; } /** Returns null if the (x|y)range-element was not found in request document. * This usally means that the axis are not manually zoomed, i.e. showing * full data extent. */ protected String[] getValueAxisRangeFromRequest() { Element yrange = (Element)XMLUtils.xpath( request, XPATH_CHART_Y_RANGE, XPathConstants.NODE, ArtifactNamespaceContext.INSTANCE); if (yrange == null) { return null; } String uri = ArtifactNamespaceContext.NAMESPACE_URI; String lower = yrange.getAttributeNS(uri, "from"); String upper = yrange.getAttributeNS(uri, "to"); return new String[] { lower, upper }; } /** * Returns the default size of a chart export as array. * * @return the default size of a chart as [width, height]. */ protected int[] getDefaultSize() { return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT }; } /** * Add datasets stored in instance variable <i>datasets</i> to plot. * <i>datasets</i> actually stores instances of AxisDataset, so each of this * datasets is mapped to a specific axis as well. * * @param plot plot to add datasets to. */ protected void addDatasets(XYPlot plot) { log.debug("addDatasets()"); // AxisDatasets are sorted, but some might be empty. // Thus, generate numbering on the fly. int axisIndex = 0; int datasetIndex = 0; for (Map.Entry<Integer, AxisDataset> entry: datasets.entrySet()) { if (!entry.getValue().isEmpty()) { // Add axis and range information. AxisDataset axisDataset = entry.getValue(); NumberAxis axis = createYAxis(entry.getKey()); plot.setRangeAxis(axisIndex, axis); if (axis.getAutoRangeIncludesZero()) { axisDataset.setRange( Range.expandToInclude(axisDataset.getRange(), 0d)); } setYBounds(axisIndex, expandPointRange(axisDataset.getRange())); // Add contained datasets, mapping to axis. for (XYDataset dataset: axisDataset.getDatasets()) { plot.setDataset(datasetIndex, dataset); plot.mapDatasetToRangeAxis(datasetIndex, axisIndex); applyThemes(plot, dataset, datasetIndex, axisDataset.isArea(dataset)); datasetIndex++; } axisDataset.setPlotAxisIndex(axisIndex); axisIndex++; } } } /** * @param idx "index" of dataset/series (first dataset to be drawn has * index 0), correlates with renderer index. * @param isArea true if the series describes an area and shall be rendered * as such. */ protected void applyThemes( XYPlot plot, XYDataset series, int idx, boolean isArea ) { if (isArea) { applyAreaTheme(plot, (StyledAreaSeriesCollection) series, idx); } else { applyLineTheme(plot, series, idx); } } /** * This method applies the themes defined in the series itself. Therefore, * <i>StyledXYSeries.applyTheme()</i> is called, which modifies the renderer * for the series. * * @param plot The plot. * @param dataset The XYDataset which needs to support Series objects. * @param idx The index of the renderer / dataset. */ protected void applyLineTheme(XYPlot plot, XYDataset dataset, int idx) { log.debug("Apply LineTheme for dataset at index: " + idx); LegendItemCollection lic = new LegendItemCollection(); LegendItemCollection anno = plot.getFixedLegendItems(); Font legendFont = createLegendLabelFont(); XYLineAndShapeRenderer renderer = createRenderer(plot, idx); for (int s = 0, num = dataset.getSeriesCount(); s < num; s++) { Series series = getSeriesOf(dataset, s); if (series instanceof StyledSeries) { Style style = ((StyledSeries) series).getStyle(); style.applyTheme(renderer, s); } // special case: if there is just one single item, we need to enable // points for this series, otherwise we would not see anything in // the chart area. if (series.getItemCount() == 1) { renderer.setSeriesShapesVisible(s, true); } LegendItem legendItem = renderer.getLegendItem(idx, s); if (legendItem.getLabel().endsWith(" ") || legendItem.getLabel().endsWith("interpol")) { legendItem = null; } if (legendItem != null) { legendItem.setLabelFont(legendFont); lic.add(legendItem); } else { log.warn("Could not get LegentItem for renderer: " + idx + ", series-idx " + s); } } if (anno != null) { lic.addAll(anno); } plot.setFixedLegendItems(lic); plot.setRenderer(idx, renderer); } /** * @param plot The plot. * @param area A StyledAreaSeriesCollection object. * @param idx The index of the dataset. */ protected void applyAreaTheme( XYPlot plot, StyledAreaSeriesCollection area, int idx ) { LegendItemCollection lic = new LegendItemCollection(); LegendItemCollection anno = plot.getFixedLegendItems(); Font legendFont = createLegendLabelFont(); log.debug("Registering an 'area'renderer at idx: " + idx); StableXYDifferenceRenderer dRenderer = new StableXYDifferenceRenderer(); if (area.getMode() == StyledAreaSeriesCollection.FILL_MODE.UNDER) { dRenderer.setPositivePaint(createTransparentPaint()); } plot.setRenderer(idx, dRenderer); area.applyTheme(dRenderer); // i18n dRenderer.setAreaLabelNumberFormat(Formatter.getFormatter(context.getMeta(), 2, 4)); dRenderer.setAreaLabelTemplate(Resources.getMsg( context.getMeta(), "area.label.template", "Area=%sm2")); LegendItem legendItem = dRenderer.getLegendItem(idx, 0); if (legendItem != null) { legendItem.setLabelFont(legendFont); lic.add(legendItem); } else { log.warn("Could not get LegentItem for renderer: " + idx + ", series-idx " + 0); } if (anno != null) { lic.addAll(anno); } plot.setFixedLegendItems(lic); } /** * Expands a given range if it collapses into one point. * * @param range Range to be expanded if upper == lower bound. * * @return Bounds of point plus 5 percent in each direction. */ private Bounds expandPointRange(Range range) { if (range == null) { return null; } else if (range.getLowerBound() == range.getUpperBound()) { Range expandedRange = ChartHelper.expandRange(range, 5d); return new DoubleBounds(expandedRange.getLowerBound(), expandedRange.getUpperBound()); } return new DoubleBounds(range.getLowerBound(), range.getUpperBound()); } /** * Creates a new instance of EnhancedLineAndShapeRenderer. * * @param plot The plot which is set for the new renderer. * @param idx This value is not used in the current implementation. * * @return a new instance of EnhancedLineAndShapeRenderer. */ protected XYLineAndShapeRenderer createRenderer(XYPlot plot, int idx) { log.debug("Create EnhancedLineAndShapeRenderer for idx: " + idx); EnhancedLineAndShapeRenderer r = new EnhancedLineAndShapeRenderer(true, false); r.setPlot(plot); return r; } /** * Creates a new instance of <i>IdentifiableNumberAxis</i>. * * @param idx The index of the new axis. * @param label The label of the new axis. * * @return an instance of IdentifiableNumberAxis. */ protected NumberAxis createNumberAxis(int idx, String label) { YAxisWalker walker = getYAxisWalker(); return new IdentifiableNumberAxis(walker.getId(idx), label); } /** * Create Y (range) axis for given index. * Shall be overriden by subclasses. */ protected NumberAxis createYAxis(int index) { YAxisWalker walker = getYAxisWalker(); Font labelFont = new Font( DEFAULT_FONT_NAME, Font.BOLD, getYAxisFontSize(index)); IdentifiableNumberAxis axis = new IdentifiableNumberAxis( walker.getId(index), getYAxisLabel(index)); axis.setAutoRangeIncludesZero(false); axis.setLabelFont(labelFont); axis.setTickLabelFont(labelFont); return axis; } /** * Creates a new LegendItem with <i>name</i> and font provided by * <i>createLegendLabelFont()</i>. * * @param theme The theme of the chart line. * @param name The displayed name of the item. * * @return a new LegendItem instance. */ public LegendItem createLegendItem(ThemeDocument theme, String name) { // OPTIMIZE Pass font, parsed Theme items. Color color = theme.parseLineColorField(); if (color == null) { color = Color.BLACK; } LegendItem legendItem = new LegendItem(name, color); legendItem.setLabelFont(createLegendLabelFont()); return legendItem; } /** * Creates Font (Family and size) to use when creating Legend Items. The * font size depends in the return value of <i>getLegendFontSize()</i>. * * @return a new Font instance with <i>DEFAULT_FONT_NAME</i>. */ protected Font createLegendLabelFont() { return new Font( DEFAULT_FONT_NAME, Font.PLAIN, getLegendFontSize() ); } /** * Create new legend entries, dependent on settings. * @param plot The plot for which to modify the legend. */ public void aggregateLegendEntries(XYPlot plot) { int AGGR_THRESHOLD = 0; if (getChartSettings() == null) { return; } Integer threshold = getChartSettings().getLegendSection() .getAggregationThreshold(); AGGR_THRESHOLD = (threshold != null) ? threshold.intValue() : 0; LegendProcessor.aggregateLegendEntries(plot, AGGR_THRESHOLD); } /** * Returns a transparently textured paint. * * @return a transparently textured paint. */ protected static Paint createTransparentPaint() { // TODO why not use a transparent color? BufferedImage texture = new BufferedImage( 1, 1, BufferedImage.TYPE_4BYTE_ABGR); return new TexturePaint( texture, new Rectangle2D.Double(0d, 0d, 0d, 0d)); } protected void preparePDFContext(CallContext context) { int[] dimension = getExportDimension(); context.putContextValue("chart.width", dimension[0]); context.putContextValue("chart.height", dimension[1]); context.putContextValue("chart.marginLeft", 5f); context.putContextValue("chart.marginRight", 5f); context.putContextValue("chart.marginTop", 5f); context.putContextValue("chart.marginBottom", 5f); context.putContextValue( "chart.page.format", ChartExportHelper.DEFAULT_PAGE_SIZE); } protected void prepareSVGContext(CallContext context) { int[] dimension = getExportDimension(); context.putContextValue("chart.width", dimension[0]); context.putContextValue("chart.height", dimension[1]); context.putContextValue( "chart.encoding", ChartExportHelper.DEFAULT_ENCODING); } /** * Retuns the call context. May be null if init hasn't been called yet. * * @return the CallContext instance */ public CallContext getCallContext() { return context; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :