Example usage for org.jfree.data.extension.impl CategoryCursor CategoryCursor

Introduction

In this page you can find the example usage for org.jfree.data.extension.impl CategoryCursor CategoryCursor.

Prototype

public CategoryCursor() 

Source Link

Document

creates a cursor without assigned position (the cursor will only be valid if setPosition is called at some time)

Usage

From source file:org.jfree.chart.demo.selection.SelectionDemo7ScatterRenderer.java

/**
 * Creates a chart.//from  www . j  a v a 2  s. co m
 * 
 * @param dataset  the dataset.
 * 
 * @return A chart.
 */
private static JFreeChart createChart(final MultiValueCategoryDataset dataset,
        final DatasetSelectionExtension<CategoryCursor<String, String>> ext) {

    ScatterRenderer r = new ScatterRenderer();
    CategoryPlot plot = new CategoryPlot(dataset, new CategoryAxis("Category"), new NumberAxis("Value"), r);
    plot.setBackgroundColor(Color.LIGHT_GRAY);
    plot.setDomainGridlinePaint(Color.white);
    plot.setRangeGridlinePaint(Color.white);
    plot.setAxisOffset(new RectangleInsets(4, 4, 4, 4));
    JFreeChart chart = new JFreeChart("ScatterRendererDemo1", plot);
    ChartUtilities.applyCurrentTheme(chart);

    //register the plot
    ext.addChangeListener(plot);

    //illustrates the usage of a shape item rendering strategy
    final CategoryCursor<String, String> cursor = new CategoryCursor<String, String>();
    r.setShapeIRS(new DefaultShapeIRS(r) {
        private static final long serialVersionUID = 1L;

        @Override
        public Shape getItemShape(int row, int column) {
            cursor.setPosition((String) dataset.getRowKey(row), (String) dataset.getColumnKey(column));
            if (ext.isSelected(cursor)) {
                return new Rectangle2D.Double(-10.0, -10.0, 20.0, 20.0);
            } else {
                return super.getItemShape(row, column);
            }
        }
    });

    return chart;
}

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