--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/chart/AbstractXYLineChart.java	Fri Sep 28 12:13:53 2012 +0200
@@ -0,0 +1,275 @@
+package de.intevation.gnv.chart;
+
+import java.awt.Color;
+import java.awt.geom.Ellipse2D;
+import java.text.NumberFormat;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Locale;
+import java.util.Map;
+
+import org.apache.log4j.Logger;
+
+import org.jfree.chart.JFreeChart;
+import org.jfree.chart.ChartFactory;
+import org.jfree.chart.axis.Axis;
+import org.jfree.chart.axis.NumberAxis;
+import org.jfree.chart.axis.NumberTickUnit;
+import org.jfree.chart.axis.AxisLocation;
+import org.jfree.chart.plot.PlotOrientation;
+import org.jfree.chart.plot.XYPlot;
+import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
+import org.jfree.chart.title.TextTitle;
+import org.jfree.data.xy.XYDataset;
+import org.jfree.data.Range;
+import org.jfree.data.general.Series;
+
+import de.intevation.gnv.geobackend.base.Result;
+import de.intevation.gnv.state.describedata.KeyValueDescibeData;
+
+
+/**
+ * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
+ */
+public abstract class AbstractXYLineChart
+extends               AbstractChart
+{
+    public static final double LOWER_MARGIN = 0.05D;
+    public static final double UPPER_MARGIN = 0.05D;
+
+    private static Logger log      = Logger.getLogger(AbstractXYLineChart.class);
+
+    protected static Color[] COLOR = {
+        Color.black, Color.red, Color.green, Color.blue, Color.yellow,
+        Color.gray, Color.orange, Color.pink, Color.cyan
+    };
+
+    protected static int nextColor = 0;
+
+    protected PlotOrientation PLOT_ORIENTATION = PlotOrientation.VERTICAL;
+
+    /** Map to store datasets for each parameter */
+    protected Map datasets;
+
+    /** Map to store max ranges of each parameter (axis.setAutoRange(true)
+     * doesn't seem to work */
+    protected Map ranges;
+
+    protected abstract void initData();
+    protected abstract void addValue(Result row, Series series);
+    protected abstract void addSeries(Series series, String label, int idx);
+    protected abstract void localizeDomainAxis(Axis axis, Locale locale);
+    protected abstract String createSeriesName(
+        String breakPoint1,
+        String breakPoint2,
+        String breakPoint3
+    );
+
+
+    public JFreeChart generateChart() {
+        log.debug("generate XYLineChart");
+        nextColor = 0;
+
+        if (chart != null)
+            return chart;
+
+        initChart();
+
+        chart.addSubtitle(new TextTitle(labels.getSubtitle()));
+
+        theme.apply(chart);
+        initData();
+
+        adjustPlot((XYPlot)chart.getPlot());
+
+        return chart;
+    }
+
+
+    protected void initChart() {
+        chart = ChartFactory.createXYLineChart(
+            labels.getTitle(),
+            labels.getDomainAxisLabel(),
+            null,
+            null,
+            PLOT_ORIENTATION,
+            true,
+            false,
+            false
+        );
+    }
+
+
+    protected void prepareAxis(String seriesKey, int idx) {
+        log.debug("prepare axis of xychart");
+
+        XYPlot plot      = chart.getXYPlot();
+        Axis xAxis       = plot.getDomainAxis();
+        NumberAxis yAxis = new NumberAxis(seriesKey);
+
+        localizeDomainAxis(xAxis, locale);
+        localizeRangeAxis(yAxis, locale);
+
+        // litte workarround to adjust the max range of axes.
+        // NumberAxis.setAutoRange(true) doesn't seem to work properly.
+        Range yRange = (Range) ranges.get(seriesKey);
+        yAxis.setRange(Range.expand(yRange, LOWER_MARGIN, UPPER_MARGIN));
+        log.debug("Max Range of dataset is: " + yRange.toString());
+
+        if (seriesKey.contains("richtung")) {
+            yAxis.setTickUnit(new NumberTickUnit(30.0));
+            yAxis.setUpperBound(360.0);
+            yAxis.setLowerBound(0.0);
+        }
+        else {
+            yAxis.setFixedDimension(10.0);
+            yAxis.setAutoRangeIncludesZero(false);
+        }
+
+        plot.setRangeAxis(idx, yAxis);
+        yAxis.configure();
+
+        if (idx % 2 != 0)
+            plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_RIGHT);
+        else
+            plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_LEFT);
+
+        plot.mapDatasetToRangeAxis(idx, idx);
+    }
+
+
+    protected void adjustRenderer(
+        int     idx,
+        int     seriesCount,
+        boolean renderLines,
+        boolean renderShapes
+    ) {
+        log.debug("Adjust render of series");
+        XYLineAndShapeRenderer renderer = null;
+        XYPlot                 plot     = chart.getXYPlot();
+
+        try {
+            renderer = (XYLineAndShapeRenderer)((XYLineAndShapeRenderer)
+                (plot.getRenderer())).clone();
+        }
+        catch (CloneNotSupportedException cnse) {
+            log.warn("Error while cloning renderer.", cnse);
+            renderer = new XYLineAndShapeRenderer(renderLines, renderShapes);
+            renderer.setBaseShape(new Ellipse2D.Double(-2,-2,4,4));
+        }
+
+        for (int i = 0; i < seriesCount; i++) {
+            renderer.setSeriesShape(i, renderer.getSeriesShape(0));
+            renderer.setSeriesPaint(i, COLOR[nextColor%COLOR.length]);
+            renderer.setSeriesShapesVisible(i, renderShapes);
+            renderer.setSeriesLinesVisible(i, renderLines);
+            nextColor++;
+        }
+        plot.setRenderer(idx, renderer);
+    }
+
+
+    protected void adjustPlot(XYPlot plot) {
+        if (plot.getRangeAxisCount() > 1)
+            plot.setRangeGridlinesVisible(false);
+    }
+
+
+    protected void localizeRangeAxis(Axis axis, Locale locale) {
+        if (locale == null)
+            return;
+
+        log.debug(
+            "Set language of axis [" + axis.getLabel() + "] " +
+            "to " + locale.toString()
+        );
+
+        NumberFormat format = NumberFormat.getInstance(locale);
+        ((NumberAxis) axis).setNumberFormatOverride(format);
+    }
+
+
+    public Range getMaxRangeOfDataset(XYDataset dataset) {
+        int    seriesCount = dataset.getSeriesCount();
+        double upper       = Double.NEGATIVE_INFINITY;
+        double lower       = Double.POSITIVE_INFINITY;
+
+        for (int i = 0; i < seriesCount; i++) {
+            int itemCount = dataset.getItemCount(i);
+
+            for (int j = 0; j < itemCount; j++) {
+                Number num = dataset.getY(i, j);
+
+                if (num != null) {
+                    double y = num.doubleValue();
+                    lower    = y < lower ? y : lower;
+                    upper    = y > upper ? y : upper;
+                }
+            }
+        }
+
+        return new Range(lower, upper);
+    }
+
+
+    public Range getMaxRangeOfDatasetWithMargin(
+        XYDataset dataset,
+        double    percent
+    ) {
+        Range range   = getMaxRangeOfDataset(dataset);
+        double length = range.getLength();
+        double upper  = range.getUpperBound() + length /100 * percent;
+        double lower  = range.getLowerBound() - length /100 * percent;
+
+        return new Range(lower, upper);
+    }
+
+
+    protected String findParameter(String label) {
+        Iterator iter = parameters.iterator();
+
+        while (iter.hasNext()) {
+            KeyValueDescibeData data = (KeyValueDescibeData) iter.next();
+            String              key  = data.getValue();
+
+            if (label.indexOf(key) > -1)
+                return key;
+        }
+
+        return label;
+    }
+
+
+    protected String findValueTitle(Collection values, String id) {
+        log.debug("find description of dataset");
+
+        if (values != null){
+            Iterator it = values.iterator();
+            while (it.hasNext()) {
+                KeyValueDescibeData data = (KeyValueDescibeData) it.next();
+
+                if (id.equals(data.getKey()))
+                    return data.getValue();
+            }
+        }
+        return "";
+    }
+
+
+    protected void storeMaxRange(Map ranges, double value, String parameter) {
+        Range  range     = null;
+
+        range = ranges.containsKey(parameter)
+            ? (Range) ranges.get(parameter)
+            : new Range(value, value);
+
+        double lower = range.getLowerBound();
+        double upper = range.getUpperBound();
+
+        lower = value < lower ? value : lower;
+        upper = value > upper ? value : upper;
+
+        ranges.put(parameter, new Range(lower, upper));
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :