afreechart/src/main/java/org/afree/chart/renderer/xy/StackedXYBarRenderer.java
/**
     * Draws the visual representation of a single data item.
     *
     * @param canvas  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the area within which the plot is being drawn.
     * @param info  collects information about the drawing.
     * @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 series  the series index (zero-based).
     * @param item  the item index (zero-based).
     * @param crosshairState  crosshair information for the plot
     *                        (<code>null</code> permitted).
     * @param pass  the pass index.
     */
Draws the visual representation of a single data item.
@param canvas  the graphics device.
@param state  the renderer state.
@param dataArea  the area within which the plot is being drawn.
@param info  collects information about the drawing.
@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 series  the series index (zero-based).
@param item  the item index (zero-based).
@param crosshairState  crosshair information for the plot
(null permitted).
@param pass  the pass index.
Draws the visual representation of a single data item . @param canvas the graphics device . @param state the renderer state . @param dataArea the area within which the plot is being drawn . @param info collects information about the drawing . @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 series the series index ( zero - based ) . @param item the item index ( zero - based ) . @param crosshairState crosshair information for the plot ( null permitted ) . @param pass the pass index .
public void drawItem(Canvas canvas,
                         XYItemRendererState state,
                         RectShape dataArea,
                         PlotRenderingInfo info,
                         XYPlot plot,
                         ValueAxis domainAxis,
                         ValueAxis rangeAxis,
                         XYDataset dataset,
                         int series,
                         int item,
                         CrosshairState crosshairState,
                         int pass) {
        if (!(dataset instanceof IntervalXYDataset
                && dataset instanceof TableXYDataset)) {
            String message = "dataset (type " + dataset.getClass().getName()
                + ") has wrong type:";
            boolean and = false;
            if (!IntervalXYDataset.class.isAssignableFrom(dataset.getClass())) {
                message += " it is no IntervalXYDataset";
                and = true;
            }
            if (!TableXYDataset.class.isAssignableFrom(dataset.getClass())) {
                if (and) {
                    message += " and";
                }
                message += " it is no TableXYDataset";
            }
            throw new IllegalArgumentException(message);
        }
        IntervalXYDataset intervalDataset = (IntervalXYDataset) dataset;
        double value = intervalDataset.getYValue(series, item);
        if (Double.isNaN(value)) {
            return;
        }
        double total = 0.0;
        if (this.renderAsPercentages) {
            total = DatasetUtilities.calculateStackTotal(
                    (TableXYDataset) dataset, item);
            value = value / total;
        }
        double positiveBase = 0.0;
        double negativeBase = 0.0;
        for (int i = 0; i < series; i++) {
            double v = dataset.getYValue(i, item);
            if (!Double.isNaN(v)) {
                if (this.renderAsPercentages) {
                    v = v / total;
                }
                if (v > 0) {
                    positiveBase = positiveBase + v;
                }
                else {
                    negativeBase = negativeBase + v;
                }
            }
        }
        double translatedBase;
        double translatedValue;
        RectangleEdge edgeR = plot.getRangeAxisEdge();
        if (value > 0.0) {
            translatedBase = rangeAxis.valueToJava2D(positiveBase, dataArea,
                    edgeR);
            translatedValue = rangeAxis.valueToJava2D(positiveBase + value,
                    dataArea, edgeR);
        }
        else {
            translatedBase = rangeAxis.valueToJava2D(negativeBase, dataArea,
                    edgeR);
            translatedValue = rangeAxis.valueToJava2D(negativeBase + value,
                    dataArea, edgeR);
        }
        RectangleEdge edgeD = plot.getDomainAxisEdge();
        double startX = intervalDataset.getStartXValue(series, item);
        if (Double.isNaN(startX)) {
            return;
        }
        double translatedStartX = domainAxis.valueToJava2D(startX, dataArea,
                edgeD);
        double endX = intervalDataset.getEndXValue(series, item);
        if (Double.isNaN(endX)) {
            return;
        }
        double translatedEndX = domainAxis.valueToJava2D(endX, dataArea, edgeD);
        double translatedWidth = Math.max(1, Math.abs(translatedEndX
                - translatedStartX));
        double translatedHeight = Math.abs(translatedValue - translatedBase);
        if (getMargin() > 0.0) {
            double cut = translatedWidth * getMargin();
            translatedWidth = translatedWidth - cut;
            translatedStartX = translatedStartX + cut / 2;
        }
        RectShape bar = null;
        PlotOrientation orientation = plot.getOrientation();
        if (orientation == PlotOrientation.HORIZONTAL) {
            bar = new RectShape(Math.min(translatedBase,
                    translatedValue), translatedEndX, translatedHeight,
                    translatedWidth);
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            bar = new RectShape(translatedStartX,
                    Math.min(translatedBase, translatedValue),
                    translatedWidth, translatedHeight);
        }
        boolean positive = (value > 0.0);
        boolean inverted = rangeAxis.isInverted();
        RectangleEdge barBase;
        if (orientation == PlotOrientation.HORIZONTAL) {
            if (positive && inverted || !positive && !inverted) {
                barBase = RectangleEdge.RIGHT;
            }
            else {
                barBase = RectangleEdge.LEFT;
            }
        }
        else {
            if (positive && !inverted || !positive && inverted) {
                barBase = RectangleEdge.BOTTOM;
            }
            else {
                barBase = RectangleEdge.TOP;
            }
        }
        if (pass == 0) {
            if (getShadowsVisible()) {
                getBarPainter().paintBarShadow(canvas, this, series, item, bar,
                        barBase, false);
            }
        }
        else if (pass == 1) {
            getBarPainter().paintBar(canvas, this, series, item, bar, barBase);
            if (info != null) {
                EntityCollection entities = info.getOwner()
                        .getEntityCollection();
                if (entities != null) {
                    addEntity(entities, bar, dataset, series, item,
                            bar.getCenterX(), bar.getCenterY());
                }
            }
        }
        else if (pass == 2) {
            if (isItemLabelVisible(series, item)) {
                XYItemLabelGenerator generator = getItemLabelGenerator(series,
                        item);
                drawItemLabel(canvas, dataset, series, item, plot, generator, bar,
                        value < 0.0);
            }
        }
    }
public void drawItem ( Canvas canvas , XYItemRendererState state , RectShape dataArea , PlotRenderingInfo info , XYPlot plot , ValueAxis domainAxis , ValueAxis rangeAxis , XYDataset dataset , int series , int item , CrosshairState crosshairState , int pass ) { if ( ! ( dataset instanceof IntervalXYDataset && dataset instanceof TableXYDataset ) ) { String message = "dataset (type " + dataset . getClass ( ) . getName ( ) + ") has wrong type:" ; boolean and = false ; if ( ! IntervalXYDataset . class . isAssignableFrom ( dataset . getClass ( ) ) ) { message += " it is no IntervalXYDataset" ; and = true ; } if ( ! TableXYDataset . class . isAssignableFrom ( dataset . getClass ( ) ) ) { if ( and ) { message += " and" ; } message += " it is no TableXYDataset" ; } throw new IllegalArgumentException ( message ) ; } IntervalXYDataset intervalDataset = ( IntervalXYDataset ) dataset ; double value = intervalDataset . getYValue ( series , item ) ; if ( Double . isNaN ( value ) ) { return ; } double total = 0.0 ; if ( this . renderAsPercentages ) { total = DatasetUtilities . calculateStackTotal ( ( TableXYDataset ) dataset , item ) ; value = value / total ; } double positiveBase = 0.0 ; double negativeBase = 0.0 ; for ( int i = 0 ; i < series ; i ++ ) { double v = dataset . getYValue ( i , item ) ; if ( ! Double . isNaN ( v ) ) { if ( this . renderAsPercentages ) { v = v / total ; } if ( v > 0 ) { positiveBase = positiveBase + v ; } else { negativeBase = negativeBase + v ; } } } double translatedBase ; double translatedValue ; RectangleEdge edgeR = plot . getRangeAxisEdge ( ) ; if ( value > 0.0 ) { translatedBase = rangeAxis . valueToJava2D ( positiveBase , dataArea , edgeR ) ; translatedValue = rangeAxis . valueToJava2D ( positiveBase + value , dataArea , edgeR ) ; } else { translatedBase = rangeAxis . valueToJava2D ( negativeBase , dataArea , edgeR ) ; translatedValue = rangeAxis . valueToJava2D ( negativeBase + value , dataArea , edgeR ) ; } RectangleEdge edgeD = plot . getDomainAxisEdge ( ) ; double startX = intervalDataset . getStartXValue ( series , item ) ; if ( Double . isNaN ( startX ) ) { return ; } double translatedStartX = domainAxis . valueToJava2D ( startX , dataArea , edgeD ) ; double endX = intervalDataset . getEndXValue ( series , item ) ; if ( Double . isNaN ( endX ) ) { return ; } double translatedEndX = domainAxis . valueToJava2D ( endX , dataArea , edgeD ) ; double translatedWidth = Math . max ( 1 , Math . abs ( translatedEndX - translatedStartX ) ) ; double translatedHeight = Math . abs ( translatedValue - translatedBase ) ; if ( getMargin ( ) > 0.0 ) { double cut = translatedWidth * getMargin ( ) ; translatedWidth = translatedWidth - cut ; translatedStartX = translatedStartX + cut / 2 ; } RectShape bar = null ; PlotOrientation orientation = plot . getOrientation ( ) ; if ( orientation == PlotOrientation . HORIZONTAL ) { bar = new RectShape ( Math . min ( translatedBase , translatedValue ) , translatedEndX , translatedHeight , translatedWidth ) ; } else if ( orientation == PlotOrientation . VERTICAL ) { bar = new RectShape ( translatedStartX , Math . min ( translatedBase , translatedValue ) , translatedWidth , translatedHeight ) ; } boolean positive = ( value > 0.0 ) ; boolean inverted = rangeAxis . isInverted ( ) ; RectangleEdge barBase ; if ( orientation == PlotOrientation . HORIZONTAL ) { if ( positive && inverted || ! positive && ! inverted ) { barBase = RectangleEdge . RIGHT ; } else { barBase = RectangleEdge . LEFT ; } } else { if ( positive && ! inverted || ! positive && inverted ) { barBase = RectangleEdge . BOTTOM ; } else { barBase = RectangleEdge . TOP ; } } if ( pass == 0 ) { if ( getShadowsVisible ( ) ) { getBarPainter ( ) . paintBarShadow ( canvas , this , series , item , bar , barBase , false ) ; } } else if ( pass == 1 ) { getBarPainter ( ) . paintBar ( canvas , this , series , item , bar , barBase ) ; if ( info != null ) { EntityCollection entities = info . getOwner ( ) . getEntityCollection ( ) ; if ( entities != null ) { addEntity ( entities , bar , dataset , series , item , bar . getCenterX ( ) , bar . getCenterY ( ) ) ; } } } else if ( pass == 2 ) { if ( isItemLabelVisible ( series , item ) ) { XYItemLabelGenerator generator = getItemLabelGenerator ( series , item ) ; drawItemLabel ( canvas , dataset , series , item , plot , generator , bar , value < 0.0 ) ; } } }
Draws the visual representation of a single data item.
Draws the visual representation of a single data item .
// if we are rendering the values as percentages, we need to calculate // the total for the current item.  Unfortunately here we end up // repeating the calculation more times than is strictly necessary - // hopefully I'll come back to this and find a way to add the // total(s) to the renderer state.  The other problem is we implicitly // assume the dataset has no negative values...perhaps that can be // fixed too. // add an entity for the item... // handle item label drawing, now that we know all the bars have // been drawn...