source: trunk/src/org/expeditee/items/widgets/charts/AbstractPie.java@ 199

package org.expeditee.items.widgets.charts;

import java.awt.Font;

import javax.swing.JPanel;

import org.expeditee.gui.AttributeUtils;
import org.expeditee.gui.AttributeValuePair;
import org.expeditee.gui.Frame;
import org.expeditee.gui.FrameIO;
import org.expeditee.items.Item;
import org.expeditee.items.Text;
import org.expeditee.items.widgets.InteractiveWidget;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.PieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;

public abstract class AbstractPie extends InteractiveWidget {

        protected static final String DEFAULT_TITLE = "";

        protected DefaultPieDataset _data = new DefaultPieDataset();

        private JFreeChart _chart = null;

        private LegendTitle _legend = null;

        private PieSectionLabelGenerator _labelGenerator;

        protected JFreeChart getChart() {
                return _chart;
        }

        protected DefaultPieDataset getData() {
                return _data;
        }

        public AbstractPie(Text source, String[] args) {
                super(source, new JPanel(), 100, 300, -1, 100, 300, -1);

                init();
                refresh();
        }

        @Override
        protected String[] getArgs() {
                return null;
        }

        protected void init() {
                // create a chart...
                _chart = createNewChart();
                _chart.getPlot().setNoDataMessage("Add link to data frame");
                _legend = _chart.getLegend();
                _labelGenerator = ((PiePlot) getChart().getPlot()).getLabelGenerator();
                super._swingComponent = new ChartPanel(_chart);
        }

        protected abstract JFreeChart createNewChart();

        @Override
        public void refresh() {
                super.refresh();
                // Get the data from the linked frame
                Frame dataFrame = getDataFrame();

                _data.clear();
                _chart.clearSubtitles();

                if (dataFrame != null) {
                        _chart.setTitle(dataFrame.getTitle());

                        for (Text t : dataFrame.getBodyTextItems(false)) {
                                AttributeValuePair avp = AttributeUtils.getPair(t.getText());
                                if (avp != null) {
                                        _data.setValue(avp.getAttribute(), avp.getDoubleValue());
                                }
                        }

                        if (dataFrame.hasAnnotation("legend")) {
                                _chart.addLegend(_legend);
                        }
                        if (dataFrame.hasAnnotation("subtitle")) {
                                getChart().addSubtitle(
                                                new TextTitle(dataFrame.getAnnotationValue("subtitle"),
                                                                JFreeChart.DEFAULT_TITLE_FONT.deriveFont(
                                                                                Font.ITALIC,
                                                                                JFreeChart.DEFAULT_TITLE_FONT
                                                                                                .getSize2D() * .7F)));
                        }
                        if (dataFrame != null) {
                                if (dataFrame.hasAnnotation("labels")) {
                                        ((PiePlot) getChart().getPlot())
                                                        .setLabelGenerator(_labelGenerator);
                                } else {
                                        ((PiePlot) getChart().getPlot()).setLabelGenerator(null);
                                }
                        }
                } else {
                        _chart.setTitle(this.getClass().getSimpleName() + " Chart");
                }
                super._swingComponent.invalidate();
        }

        @Override
        public float getMinimumBorderThickness() {
                return 1.0F;
        }
}