boxandwhiskerrenderer.java

关于jfreechart的电子说明书,一种说明图型使用的介绍

     * @param dataset  the data.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     * @param pass  the pass index.
     */
    public void drawItem(Graphics2D g2,
                         CategoryItemRendererState state,
                         Rectangle2D dataArea,
                         CategoryPlot plot,
                         CategoryAxis domainAxis,
                         ValueAxis rangeAxis,
                         CategoryDataset dataset,
                         int row,
                         int column,
                         int pass) {
                             
        if (!(dataset instanceof BoxAndWhiskerCategoryDataset)) {
            throw new IllegalArgumentException(
                "BoxAndWhiskerRenderer.drawItem() : the data should be of type "
                + "BoxAndWhiskerCategoryDataset only."
            );
        }

        PlotOrientation orientation = plot.getOrientation();

        if (orientation == PlotOrientation.HORIZONTAL) {
            drawHorizontalItem(
                g2, state, dataArea, plot, domainAxis, rangeAxis, 
                dataset, row, column
            );
        } 
        else if (orientation == PlotOrientation.VERTICAL) {
            drawVerticalItem(
                g2, state, dataArea, plot, domainAxis, rangeAxis, 
                dataset, row, column
            );
        }
        
    }

    /**
     * Draws the visual representation of a single data item when the plot has 
     * a horizontal orientation.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the plot is being drawn.
     * @param plot  the plot (can be used to obtain standard color 
     *              information etc).
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    public void drawHorizontalItem(Graphics2D g2,
                                   CategoryItemRendererState state,
                                   Rectangle2D dataArea,
                                   CategoryPlot plot,
                                   CategoryAxis domainAxis,
                                   ValueAxis rangeAxis,
                                   CategoryDataset dataset,
                                   int row,
                                   int column) {

        BoxAndWhiskerCategoryDataset bawDataset 
            = (BoxAndWhiskerCategoryDataset) dataset;

        double categoryEnd = domainAxis.getCategoryEnd(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge()
        );
        double categoryStart = domainAxis.getCategoryStart(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge()
        );
        double categoryWidth = Math.abs(categoryEnd - categoryStart);

        double yy = categoryStart;
        int seriesCount = getRowCount();
        int categoryCount = getColumnCount();

        if (seriesCount > 1) {
            double seriesGap = dataArea.getWidth() * getItemMargin()
                               / (categoryCount * (seriesCount - 1));
            double usedWidth = (state.getBarWidth() * seriesCount) 
                               + (seriesGap * (seriesCount - 1));
            // offset the start of the boxes if the total width used is smaller
            // than the category width
            double offset = (categoryWidth - usedWidth) / 2;
            yy = yy + offset + (row * (state.getBarWidth() + seriesGap));
        } 
        else {
            // offset the start of the box if the box width is smaller than 
            // the category width
            double offset = (categoryWidth - state.getBarWidth()) / 2;
            yy = yy + offset;
        }

        Paint p = getItemPaint(row, column);
        if (p != null) {
            g2.setPaint(p);
        }
        Stroke s = getItemStroke(row, column);
        g2.setStroke(s);

        RectangleEdge location = plot.getRangeAxisEdge();

        Number xQ1 = bawDataset.getQ1Value(row, column);
        Number xQ3 = bawDataset.getQ3Value(row, column);
        Number xMax = bawDataset.getMaxRegularValue(row, column);
        Number xMin = bawDataset.getMinRegularValue(row, column);

        Shape box = null;
        if (xQ1 != null && xQ3 != null && xMax != null && xMin != null) {

            double xxQ1 = rangeAxis.valueToJava2D(
                xQ1.doubleValue(), dataArea, location
            );
            double xxQ3 = rangeAxis.valueToJava2D(
                xQ3.doubleValue(), dataArea, location
            );
            double xxMax = rangeAxis.valueToJava2D(
                xMax.doubleValue(), dataArea, location
            );
            double xxMin = rangeAxis.valueToJava2D(
                xMin.doubleValue(), dataArea, location
            );
            double yymid = yy + state.getBarWidth() / 2.0;
            
            // draw the upper shadow...
            g2.draw(new Line2D.Double(xxMax, yymid, xxQ3, yymid));
            g2.draw(
                new Line2D.Double(xxMax, yy, xxMax, yy + state.getBarWidth())
            );

            // draw the lower shadow...
            g2.draw(new Line2D.Double(xxMin, yymid, xxQ1, yymid));
            g2.draw(
                new Line2D.Double(xxMin, yy, xxMin, yy + state.getBarWidth())
            );

            // draw the box...
            box = new Rectangle2D.Double(
                Math.min(xxQ1, xxQ3), yy, Math.abs(xxQ1 - xxQ3), 
                state.getBarWidth()
            );
            if (this.fillBox) {
                g2.fill(box);
            } 
            g2.draw(box);

        }

        g2.setPaint(this.artifactPaint);
        double aRadius = 0;                 // average radius

        // draw mean - SPECIAL AIMS REQUIREMENT...
        Number xMean = bawDataset.getMeanValue(row, column);
        if (xMean != null) {
            double xxMean = rangeAxis.valueToJava2D(
                xMean.doubleValue(), dataArea, location
            );
            aRadius = state.getBarWidth() / 4;
            Ellipse2D.Double avgEllipse = new Ellipse2D.Double(
                xxMean - aRadius, yy + aRadius, aRadius * 2, aRadius * 2
            );
            g2.fill(avgEllipse);
            g2.draw(avgEllipse);
        }

        // draw median...
        Number xMedian = bawDataset.getMedianValue(row, column);
        if (xMedian != null) {
            double xxMedian = rangeAxis.valueToJava2D(
                xMedian.doubleValue(), dataArea, location
            );
            g2.draw(
                new Line2D.Double(
                    xxMedian, yy, xxMedian, yy + state.getBarWidth()
                )
            );
        }
        
        // collect entity and tool tip information...
        if (state.getInfo() != null) {
            EntityCollection entities = state.getEntityCollection();
            if (entities != null) {
                String tip = null;
                CategoryToolTipGenerator tipster 
                    = getToolTipGenerator(row, column);
                if (tipster != null) {
                    tip = tipster.generateToolTip(dataset, row, column);
                }
                String url = null;
                if (getItemURLGenerator(row, column) != null) {
                    url = getItemURLGenerator(row, column).generateURL(
                        dataset, row, column
                    );
                }
                CategoryItemEntity entity = new CategoryItemEntity(
                    box, tip, url, dataset, row, dataset.getColumnKey(column), 
                    column
                );
                entities.add(entity);
            }
        }

    } 
        
    /**
     * Draws the visual representation of a single data item when the plot has 
     * a vertical orientation.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the plot is being drawn.
     * @param plot  the plot (can be used to obtain standard color information 
     *              etc).
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the dataset.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    public void drawVerticalItem(Graphics2D g2, 
                                 CategoryItemRendererState state,
                                 Rectangle2D dataArea,
                                 CategoryPlot plot, 
                                 CategoryAxis domainAxis, 
                                 ValueAxis rangeAxis,
                                 CategoryDataset dataset, 
                                 int row, 
                                 int column) {

        BoxAndWhiskerCategoryDataset bawDataset 
            = (BoxAndWhiskerCategoryDataset) dataset;
        
        double categoryEnd = domainAxis.getCategoryEnd(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge()
        );
        double categoryStart = domainAxis.getCategoryStart(
            column, getColumnCount(), dataArea, plot.getDomainAxisEdge()
        );
        double categoryWidth = categoryEnd - categoryStart;

        double xx = categoryStart;
        int seriesCount = getRowCount();
        int categoryCount = getColumnCount();

        if (seriesCount > 1) {
            double seriesGap = dataArea.getWidth() * getItemMargin() 
                               / (categoryCount * (seriesCount - 1));
            double usedWidth = (state.getBarWidth() * seriesCount) 
                               + (seriesGap * (seriesCount - 1));
            // offset the start of the boxes if the total width used is smaller
            // than the category width
            double offset = (categoryWidth - usedWidth) / 2;
            xx = xx + offset + (row * (state.getBarWidth() + seriesGap));
        } 
        else {
            // offset the start of the box if the box width is smaller than the 
            // category width
            double offset = (categoryWidth - state.getBarWidth()) / 2;
            xx = xx + offset;
        } 
        
        double yyAverage = 0.0;
        double yyOutlier;

        Paint p = getItemPaint(row, column);
        if (p != null) {
            g2.setPaint(p);
        }
        Stroke s = getItemStroke(row, column);
        g2.setStroke(s);

        double aRadius = 0;                 // average radius

        RectangleEdge location = plot.getRangeAxisEdge();

        Number yQ1 = bawDataset.getQ1Value(row, column);
        Number yQ3 = bawDataset.getQ3Value(row, column);
        Number yMax = bawDataset.getMaxRegularValue(row, column);
        Number yMin = bawDataset.getMinRegularValue(row, column);
        Shape box = null;
        if (yQ1 != null && yQ3 != null && yMax != null && yMin != null) {

            double yyQ1 = rangeAxis.valueToJava2D(
                yQ1.doubleValue(), dataArea, location
            );
            double yyQ3 = rangeAxis.valueToJava2D(
                yQ3.doubleValue(), dataArea, location
            );
            double yyMax = rangeAxis.valueToJava2D(
                yMax.doubleValue(), dataArea, location
            );
            double yyMin = rangeAxis.valueToJava2D(
                yMin.doubleValue(), dataArea, location
            );
            double xxmid = xx + state.getBarWidth() / 2.0;