ingo@617: package de.intevation.gnv.chart;
ingo@617:
ingo@617: import java.util.Locale;
ingo@617:
ingo@617: import org.apache.log4j.Logger;
ingo@617:
ingo@617: import org.jfree.chart.ChartFactory;
ingo@617: import org.jfree.chart.ChartTheme;
ingo@617: import org.jfree.chart.JFreeChart;
ingo@617:
ingo@617: import org.jfree.chart.plot.PlotOrientation;
ingo@617: import org.jfree.chart.plot.XYPlot;
ingo@617:
sascha@623: import org.jfree.chart.renderer.xy.XYBarRenderer;
ingo@617:
ingo@617: /**
ingo@767: * This abstract class defines some methods to adjust chart settings after its
ingo@767: * creation.
ingo@767: *
ingo@767: * @author Ingo Weinzierl
ingo@617: */
ingo@617: public abstract class AbstractHistogram
ingo@617: implements Chart
ingo@617: {
ingo@767: /**
ingo@767: * Logger used for logging with Apache log4j.
ingo@767: */
ingo@617: private Logger logger = Logger.getLogger(AbstractHistogram.class);
ingo@617:
ingo@767: /**
ingo@767: * JFreeChart chart stored at this place after chart creation.
ingo@767: */
ingo@617: protected JFreeChart chart;
ingo@767:
ingo@767: /**
ingo@767: * Labels used for chart title, subtitle, axis description.
ingo@767: */
ingo@617: protected ChartLabels labels;
ingo@767:
ingo@767: /**
ingo@767: * Theme which is used to adjust the styling of this chart.
ingo@767: */
ingo@617: protected ChartTheme theme;
ingo@767:
ingo@767: /**
ingo@767: * Raw data which should be displayed in the chart.
ingo@767: */
ingo@617: protected Object[] data;
ingo@617:
ingo@767: /**
ingo@767: * Locale object used for i18n support.
ingo@767: */
ingo@617: protected Locale locale;
ingo@617:
ingo@617:
ingo@767: /**
ingo@767: * Constructor for creating histogram charts.
ingo@767: *
ingo@767: * @param labels See {@link #labels}
ingo@767: * @param data See {@link #data}
ingo@767: * @param theme See {@link #theme}
ingo@767: */
ingo@617: public AbstractHistogram(
ingo@617: ChartLabels labels, Object[] data, ChartTheme theme
ingo@617: ) {
ingo@617: this.labels = labels;
ingo@617: this.data = data;
ingo@617: this.theme = theme;
ingo@617: }
ingo@617:
ingo@617:
ingo@767: /**
ingo@767: * @see de.intevation.gnv.chart.Chart#generateChart()
ingo@767: */
ingo@617: public JFreeChart generateChart() {
ingo@617:
ingo@617: if (chart != null)
ingo@617: return chart;
ingo@617:
ingo@617: chart = ChartFactory.createHistogram(
ingo@617: labels.getTitle(),
ingo@617: labels.getDomainAxisLabel(),
ingo@617: labels.getRangeAxisLabel(),
ingo@617: null,
ingo@617: PlotOrientation.VERTICAL,
ingo@617: true,
ingo@617: false,
ingo@617: false);
ingo@617:
ingo@617: applyDatasets();
ingo@617:
ingo@617: theme.apply(chart);
ingo@617: adjustPlot();
ingo@617:
ingo@617: return chart;
ingo@617: }
ingo@617:
ingo@617:
ingo@767: /**
ingo@767: * Method to do some changes in plot settings.
ingo@767: */
ingo@617: protected void adjustPlot() {
ingo@617: XYPlot plot = (XYPlot) chart.getPlot();
ingo@617: XYBarRenderer renderer = (XYBarRenderer) plot.getRenderer();
ingo@617:
ingo@617: renderer.setShadowVisible(false);
ingo@617: renderer.setSeriesVisibleInLegend(0, false);
ingo@617: }
ingo@617:
ingo@617:
ingo@767: /**
ingo@767: * This method needs to be implemented by subclasses and should add valid
ingo@767: * HistogramDataset
objects to the created chart. It is called
ingo@767: * by {@link #generateChart} after chart creation.
ingo@767: */
ingo@617: protected abstract void applyDatasets();
ingo@617: }
ingo@617: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :