Java Code Examples for org.jfree.chart.util.GradientPaintTransformer#transform()

/**
 * Paints a single bar instance.
 *
 * @param g2  the graphics target.
 * @param renderer  the renderer.
 * @param row  the row index.
 * @param column  the column index.
 * @param selected  is the data item selected?
 * @param bar  the bar
 * @param base  indicates which side of the rectangle is the base of the
 *              bar.
 *
 * @since 1.2.0
 */
public void paintBar(Graphics2D g2, XYBarRenderer renderer, int row,
        int column, boolean selected, RectangularShape bar,
        RectangleEdge base) {

    Paint itemPaint = renderer.getItemPaint(row, column, selected);
    GradientPaintTransformer t = renderer.getGradientPaintTransformer();
    if (t != null && itemPaint instanceof GradientPaint) {
        itemPaint = t.transform((GradientPaint) itemPaint, bar);
    }
    g2.setPaint(itemPaint);
    g2.fill(bar);

    // draw the outline...
    if (renderer.isDrawBarOutline()) {
           // && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
        Stroke stroke = renderer.getItemOutlineStroke(row, column,
                selected);
        Paint paint = renderer.getItemOutlinePaint(row, column, selected);
        if (stroke != null && paint != null) {
            g2.setStroke(stroke);
            g2.setPaint(paint);
            g2.draw(bar);
        }
    }

}
 

/**
 * Paints a single bar instance.
 *
 * @param g2  the graphics target.
 * @param renderer  the renderer.
 * @param row  the row index.
 * @param column  the column index.
 * @param selected  is the item selected?
 * @param bar  the bar
 * @param base  indicates which side of the rectangle is the base of the
 *              bar.
 */
public void paintBar(Graphics2D g2, BarRenderer renderer, int row,
        int column, boolean selected, RectangularShape bar,
        RectangleEdge base) {

    Paint itemPaint = renderer.getItemPaint(row, column, selected);
    GradientPaintTransformer t = renderer.getGradientPaintTransformer();
    if (t != null && itemPaint instanceof GradientPaint) {
        itemPaint = t.transform((GradientPaint) itemPaint, bar);
    }
    g2.setPaint(itemPaint);
    g2.fill(bar);

    // draw the outline...
    if (renderer.isDrawBarOutline()) {
           // && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
        Stroke stroke = renderer.getItemOutlineStroke(row, column,
                selected);
        Paint paint = renderer.getItemOutlinePaint(row, column, selected);
        if (stroke != null && paint != null) {
            g2.setStroke(stroke);
            g2.setPaint(paint);
            g2.draw(bar);
        }
    }

}
 

/**
 * Draws the bar for a single (series, category) data item.
 *
 * @param g2  the graphics device.
 * @param state  the renderer state.
 * @param dataArea  the data area.
 * @param plot  the plot.
 * @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).
 * @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) {

    // nothing is drawn for null values...
    Number dataValue = dataset.getValue(row, column);
    if (dataValue == null) {
        return;
    }
    
    double value = dataValue.doubleValue();
    
    PlotOrientation orientation = plot.getOrientation();
    double barW0 = calculateBarW0(plot, orientation, dataArea, domainAxis, 
            state, row, column);
    double[] barL0L1 = calculateBarL0L1(value);
    if (barL0L1 == null) {
        return;  // the bar is not visible
    }
    
    RectangleEdge edge = plot.getRangeAxisEdge();
    double transL0 = rangeAxis.valueToJava2D(barL0L1[0], dataArea, edge);
    double transL1 = rangeAxis.valueToJava2D(barL0L1[1], dataArea, edge);
    double barL0 = Math.min(transL0, transL1);
    double barLength = Math.max(Math.abs(transL1 - transL0), 
            getMinimumBarLength());

    // draw the bar...
    Rectangle2D bar = null;
    if (orientation == PlotOrientation.HORIZONTAL) {
        bar = new Rectangle2D.Double(barL0, barW0, barLength, 
                state.getBarWidth());
    }
    else {
        bar = new Rectangle2D.Double(barW0, barL0, state.getBarWidth(), 
                barLength);
    }
    Paint itemPaint = getItemPaint(row, column);
    GradientPaintTransformer t = getGradientPaintTransformer();
    if (t != null && itemPaint instanceof GradientPaint) {
        itemPaint = t.transform((GradientPaint) itemPaint, bar);
    }
    g2.setPaint(itemPaint);
    g2.fill(bar);

    // draw the outline...
    if (isDrawBarOutline() 
            && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
        Stroke stroke = getItemOutlineStroke(row, column);
        Paint paint = getItemOutlinePaint(row, column);
        if (stroke != null && paint != null) {
            g2.setStroke(stroke);
            g2.setPaint(paint);
            g2.draw(bar);
        }
    }

    CategoryItemLabelGenerator generator 
        = getItemLabelGenerator(row, column);
    if (generator != null && isItemLabelVisible(row, column)) {
        drawItemLabel(g2, dataset, row, column, plot, generator, bar, 
                (value < 0.0));
    }        

    // add an item entity, if this information is being collected
    EntityCollection entities = state.getEntityCollection();
    if (entities != null) {
        addItemEntity(entities, dataset, row, column, bar);
    }

}