Example usage for java.awt Graphics2D setPaint

List of usage examples for java.awt Graphics2D setPaint

Introduction

In this page you can find the example usage for java.awt Graphics2D setPaint.

Prototype

public abstract void setPaint(Paint paint);

Source Link

Document

Sets the Paint attribute for the Graphics2D context.

Usage

From source file:gov.sandia.umf.platform.ui.jobs.Raster.java

public JFreeChart createChart(final XYDataset dataset) {
    final JFreeChart chart = ChartFactory.createScatterPlot(null, // chart title
            null, // x axis label
            null, // y axis label
            dataset, // data
            PlotOrientation.VERTICAL, false, // include legend
            true, // tooltips
            false // urls
    );/*from  w w w .j  av a2  s  .  com*/

    chart.setBackgroundPaint(Color.white);

    XYPlot plot = chart.getXYPlot();
    plot.setBackgroundPaint(Color.white);
    plot.setRangeGridlinePaint(Color.lightGray);
    plot.setDomainPannable(true);
    plot.setRangePannable(true);

    plot.setRenderer(new XYDotRenderer() {
        public void drawItem(java.awt.Graphics2D g2, XYItemRendererState state,
                java.awt.geom.Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis,
                ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState,
                int pass) {
            // Copied from org.jfree.chart.renderer.xy.XYDotRenderer.java and modified.
            // This would only need to be a couple of lines if they authors of jfreechart had not made dotWidth and dotHeight private members.
            // Yet another example of textbook OO programming gone awry. (Can anyone hear me scream?)

            if (!getItemVisible(series, item))
                return;

            int dotWidth = 1;

            double rasterLines = rangeAxis.getRange().getLength();
            int pixels = g2.getClipBounds().height;
            double height = pixels / rasterLines;
            if (height > 10)
                height -= 2;
            else if (height > 2)
                height -= 1;
            int dotHeight = (int) Math.min(20, Math.max(1, Math.floor(height)));

            double x = dataset.getXValue(series, item);
            double y = dataset.getYValue(series, item);
            if (Double.isNaN(y))
                return;
            double adjx = (dotWidth - 1) / 2.0;
            double adjy = (dotHeight - 1) / 2.0;

            RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
            RectangleEdge yAxisLocation = plot.getRangeAxisEdge();
            double transX = domainAxis.valueToJava2D(x, dataArea, xAxisLocation) - adjx;
            double transY = rangeAxis.valueToJava2D(y, dataArea, yAxisLocation) - adjy;

            g2.setPaint(Color.black);
            PlotOrientation orientation = plot.getOrientation();
            if (orientation == PlotOrientation.HORIZONTAL)
                g2.fillRect((int) transY, (int) transX, dotHeight, dotWidth);
            else
                g2.fillRect((int) transX, (int) transY, dotWidth, dotHeight);

            int domainAxisIndex = plot.getDomainAxisIndex(domainAxis);
            int rangeAxisIndex = plot.getRangeAxisIndex(rangeAxis);
            updateCrosshairValues(crosshairState, x, y, domainAxisIndex, rangeAxisIndex, transX, transY,
                    orientation);
        }
    });

    NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); // Integer units only

    return chart;
}

From source file:nl.vu.nat.jfreechartcustom.XYBlockRenderer.java

/**
 * Draws the block representing the specified item.
 *
 * @param g2  the graphics device./* ww  w  .  jav a2  s  . c o  m*/
 * @param state  the state.
 * @param dataArea  the data area.
 * @param info  the plot rendering info.
 * @param plot  the plot.
 * @param domainAxis  the x-axis.
 * @param rangeAxis  the y-axis.
 * @param dataset  the dataset.
 * @param series  the series index.
 * @param item  the item index.
 * @param crosshairState  the crosshair state.
 * @param pass  the pass index.
 */
public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info,
        XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item,
        CrosshairState crosshairState, int pass) {

    boolean bAddEntity = false;

    double x = dataset.getXValue(series, item);
    double y = dataset.getYValue(series, item);
    double z = 0.0;
    if (dataset instanceof XYZDataset) {
        z = ((XYZDataset) dataset).getZValue(series, item);
    }
    Paint p = this.paintScale.getPaint(z);
    double xx0 = domainAxis.valueToJava2D(x + this.xOffset, dataArea, plot.getDomainAxisEdge());
    double yy0 = rangeAxis.valueToJava2D(y + this.yOffset, dataArea, plot.getRangeAxisEdge());
    double xx1 = domainAxis.valueToJava2D(x + this.blockWidth + this.xOffset, dataArea,
            plot.getDomainAxisEdge());
    double yy1 = rangeAxis.valueToJava2D(y + this.blockHeight + this.yOffset, dataArea,
            plot.getRangeAxisEdge());
    Rectangle2D block;
    PlotOrientation orientation = plot.getOrientation();
    if (orientation.equals(PlotOrientation.HORIZONTAL)) {
        block = new Rectangle2D.Double(Math.min(yy0, yy1), Math.min(xx0, xx1), Math.abs(yy1 - yy0),
                Math.abs(xx0 - xx1));
    } else {
        // Detect if Rectangle is smaller than 2 by 2 pixels 
        block = new Rectangle2D.Double(Math.min(xx0, xx1), Math.min(yy0, yy1), Math.abs(xx1 - xx0),
                Math.abs(yy1 - yy0));
    }
    g2.setPaint(p);
    g2.fill(block);
    g2.setStroke(new BasicStroke(1.0f));
    //        g2.draw(block);
    EntityCollection entities = state.getEntityCollection();
    if (entities != null && bAddEntity) {
        addEntity(entities, block, dataset, series, item, 0.0, 0.0);
    }

}

From source file:net.sourceforge.processdash.ev.ui.chart.RangeXYItemRenderer.java

private void drawItemRangeGradient(Graphics2D g2, Line2D line, Paint paint, Stroke stroke, double x2, double y2,
        double x3, double y3) {
    Line2D edge1, edge2, mainLine;
    Polygon fillArea;//from w  w w  .  j  a va 2 s  .c  o m
    Stroke mainLineStroke, edgeLineStroke;
    Paint mainLinePaint, edgeLinePaint, fillPaint;

    double x0 = line.getX1();
    double y0 = line.getY1();
    double x1 = line.getX2();
    double y1 = line.getY2();

    mainLine = new Line2D.Double(x0, y0, x1, y1);
    edge1 = new Line2D.Double(x0, y0, x2, y2);
    edge2 = new Line2D.Double(x0, y0, x3, y3);
    fillArea = new Polygon();
    fillArea.addPoint((int) Math.round(x0), (int) Math.round(y0));
    fillArea.addPoint((int) Math.round(x2), (int) Math.round(y2));
    fillArea.addPoint((int) Math.round(x3), (int) Math.round(y3));

    mainLinePaint = paint;
    if (mainLinePaint instanceof Color) {
        Color c = (Color) mainLinePaint;
        Color dark = transp(c, calcAlpha(c));
        Color light = transp(c, 0.01);
        edgeLinePaint = fillPaint = c;
        try {
            fillPaint = new GradientPaint(gradientStart(x0, y0, x1, y1, x2, y2, x3, y3), light,
                    new Point2D.Double(x1, y1), dark, true);
        } catch (Exception e) {
        }
    } else {
        edgeLinePaint = fillPaint = mainLinePaint;
    }

    if (stroke instanceof BasicStroke) {
        float lineWidth = ((BasicStroke) stroke).getLineWidth();
        edgeLineStroke = new BasicStroke(lineWidth / 4);
        mainLineStroke = new BasicStroke(lineWidth * 2);
    } else {
        mainLineStroke = edgeLineStroke = stroke;
    }

    g2.setPaint(fillPaint);
    g2.fill(fillArea);
    g2.fill(fillArea);

    g2.setStroke(edgeLineStroke);
    g2.setPaint(edgeLinePaint);
    g2.draw(edge1);
    g2.draw(edge2);

    g2.setStroke(mainLineStroke);
    g2.setPaint(mainLinePaint);
    g2.draw(mainLine);
}

From source file:org.pentaho.reporting.engine.classic.core.modules.output.pageable.pdf.internal.PdfGraphics2D.java

private void setPaint(final boolean invert, final double xoffset, final double yoffset, final boolean fill) {
    if (paint instanceof Color) {
        final Color color = (Color) paint;
        final int alpha = color.getAlpha();
        if (fill) {
            if (alpha != currentFillGState) {
                currentFillGState = alpha;
                PdfGState gs = fillGState[alpha];
                if (gs == null) {
                    gs = new PdfGState();
                    gs.setFillOpacity(alpha / 255.00f);
                    fillGState[alpha] = gs;
                }/*w w w  .j a va 2 s. co m*/
                cb.setGState(gs);
            }
            cb.setColorFill(color);
        } else {
            if (alpha != currentStrokeGState) {
                currentStrokeGState = alpha;
                PdfGState gs = strokeGState[alpha];
                if (gs == null) {
                    gs = new PdfGState();
                    gs.setStrokeOpacity(alpha / 255.0f);
                    strokeGState[alpha] = gs;
                }
                cb.setGState(gs);
            }
            cb.setColorStroke(color);
        }
    } else if (paint instanceof GradientPaint) {
        final GradientPaint gp = (GradientPaint) paint;
        final Point2D p1 = gp.getPoint1();
        transform.transform(p1, p1);
        final Point2D p2 = gp.getPoint2();
        transform.transform(p2, p2);
        final Color c1 = gp.getColor1();
        final Color c2 = gp.getColor2();
        final PdfShading shading = PdfShading.simpleAxial(cb.getPdfWriter(), (float) p1.getX(),
                normalizeY((float) p1.getY()), (float) p2.getX(), normalizeY((float) p2.getY()), c1, c2);
        final PdfShadingPattern pat = new PdfShadingPattern(shading);
        if (fill) {
            cb.setShadingFill(pat);
        } else {
            cb.setShadingStroke(pat);
        }
    } else if (paint instanceof TexturePaint) {
        try {
            final TexturePaint tp = (TexturePaint) paint;
            final BufferedImage img = tp.getImage();
            final Rectangle2D rect = tp.getAnchorRect();
            final com.lowagie.text.Image image = com.lowagie.text.Image.getInstance(img, null);
            final PdfPatternPainter pattern = cb.createPattern(image.getWidth(), image.getHeight());
            final AffineTransform inverse = this.normalizeMatrix();
            inverse.translate(rect.getX(), rect.getY());
            inverse.scale(rect.getWidth() / image.getWidth(), -rect.getHeight() / image.getHeight());
            final double[] mx = new double[6];
            inverse.getMatrix(mx);
            pattern.setPatternMatrix((float) mx[0], (float) mx[1], (float) mx[2], (float) mx[3], (float) mx[4],
                    (float) mx[5]);
            image.setAbsolutePosition(0, 0);
            pattern.addImage(image);
            if (fill) {
                cb.setPatternFill(pattern);
            } else {
                cb.setPatternStroke(pattern);
            }

        } catch (Exception ex) {
            if (fill) {
                cb.setColorFill(Color.gray);
            } else {
                cb.setColorStroke(Color.gray);
            }
        }
    } else {
        try {
            int type = BufferedImage.TYPE_4BYTE_ABGR;
            if (paint.getTransparency() == Transparency.OPAQUE) {
                type = BufferedImage.TYPE_3BYTE_BGR;
            }
            final BufferedImage img = new BufferedImage((int) width, (int) height, type);
            final Graphics2D g = (Graphics2D) img.getGraphics();
            g.transform(transform);
            final AffineTransform inv = transform.createInverse();
            Shape fillRect = new Rectangle2D.Double(0, 0, img.getWidth(), img.getHeight());
            fillRect = inv.createTransformedShape(fillRect);
            g.setPaint(paint);
            g.fill(fillRect);
            if (invert) {
                final AffineTransform tx = new AffineTransform();
                tx.scale(1, -1);
                tx.translate(-xoffset, -yoffset);
                g.drawImage(img, tx, null);
            }
            g.dispose();
            // g = null;
            final com.lowagie.text.Image image = com.lowagie.text.Image.getInstance(img, null);
            final PdfPatternPainter pattern = cb.createPattern(width, height);
            image.setAbsolutePosition(0, 0);
            pattern.addImage(image);
            if (fill) {
                cb.setPatternFill(pattern);
            } else {
                cb.setPatternStroke(pattern);
            }
        } catch (Exception ex) {
            if (fill) {
                cb.setColorFill(Color.gray);
            } else {
                cb.setColorStroke(Color.gray);
            }
        }
    }
}

From source file:edu.scripps.fl.curves.plot.MyXYErrorRenderer.java

public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info,
        XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item,
        CrosshairState crosshairState, int pass) {
    if (pass == 0 && (dataset instanceof IntervalXYDataset) && getItemVisible(series, item)) {
        IntervalXYDataset ixyd = (IntervalXYDataset) dataset;
        PlotOrientation orientation = plot.getOrientation();
        if (getSeriesXError(series)) {
            double x0 = ixyd.getStartXValue(series, item);
            double x1 = ixyd.getEndXValue(series, item);
            double y = ixyd.getYValue(series, item);
            org.jfree.ui.RectangleEdge edge = plot.getDomainAxisEdge();
            double xx0 = domainAxis.valueToJava2D(x0, dataArea, edge);
            double xx1 = domainAxis.valueToJava2D(x1, dataArea, edge);
            double yy = rangeAxis.valueToJava2D(y, dataArea, plot.getRangeAxisEdge());
            Line2D cap1 = null;// ww w.  ja  v a  2 s.c o m
            Line2D cap2 = null;
            double adj = capLength / 2D;
            Line2D line;
            if (orientation == PlotOrientation.VERTICAL) {
                line = new java.awt.geom.Line2D.Double(xx0, yy, xx1, yy);
                cap1 = new java.awt.geom.Line2D.Double(xx0, yy - adj, xx0, yy + adj);
                cap2 = new java.awt.geom.Line2D.Double(xx1, yy - adj, xx1, yy + adj);
            } else {
                line = new java.awt.geom.Line2D.Double(yy, xx0, yy, xx1);
                cap1 = new java.awt.geom.Line2D.Double(yy - adj, xx0, yy + adj, xx0);
                cap2 = new java.awt.geom.Line2D.Double(yy - adj, xx1, yy + adj, xx1);
            }
            if (errorPaint != null)
                g2.setPaint(errorPaint);
            else
                g2.setPaint(getItemPaint(series, item));
            if (errorStroke != null)
                g2.setStroke(errorStroke);
            else
                g2.setStroke(getItemStroke(series, item));
            g2.draw(line);
            g2.draw(cap1);
            g2.draw(cap2);
        }
        if (getSeriesYError(series)) {
            double y0 = ixyd.getStartYValue(series, item);
            double y1 = ixyd.getEndYValue(series, item);
            double x = ixyd.getXValue(series, item);
            org.jfree.ui.RectangleEdge edge = plot.getRangeAxisEdge();
            double yy0 = rangeAxis.valueToJava2D(y0, dataArea, edge);
            double yy1 = rangeAxis.valueToJava2D(y1, dataArea, edge);
            double xx = domainAxis.valueToJava2D(x, dataArea, plot.getDomainAxisEdge());
            Line2D cap1 = null;
            Line2D cap2 = null;
            double adj = capLength / 2D;
            Line2D line;
            if (orientation == PlotOrientation.VERTICAL) {
                line = new java.awt.geom.Line2D.Double(xx, yy0, xx, yy1);
                cap1 = new java.awt.geom.Line2D.Double(xx - adj, yy0, xx + adj, yy0);
                cap2 = new java.awt.geom.Line2D.Double(xx - adj, yy1, xx + adj, yy1);
            } else {
                line = new java.awt.geom.Line2D.Double(yy0, xx, yy1, xx);
                cap1 = new java.awt.geom.Line2D.Double(yy0, xx - adj, yy0, xx + adj);
                cap2 = new java.awt.geom.Line2D.Double(yy1, xx - adj, yy1, xx + adj);
            }
            if (errorPaint != null)
                g2.setPaint(errorPaint);
            else
                g2.setPaint(getItemPaint(series, item));
            if (errorStroke != null)
                g2.setStroke(errorStroke);
            else
                g2.setStroke(getItemStroke(series, item));
            g2.draw(line);
            g2.draw(cap1);
            g2.draw(cap2);
        }
    }
    super.drawItem(g2, state, dataArea, info, plot, domainAxis, rangeAxis, dataset, series, item,
            crosshairState, pass);
}

From source file:org.openfaces.component.chart.impl.renderers.XYLineFillRenderer.java

private void configureGradientAreaFill(Graphics2D g2, XYPlot plot, PlotRenderingInfo info, Paint itemPaint,
        GradientLineAreaFill gradientLineAreaFill) {
    final Rectangle2D plotArea = info.getPlotArea();
    double plotWidth = plotArea.getWidth();
    double plotHeight = plotArea.getHeight();
    Double mainColorTransparency = gradientLineAreaFill.getMaxValueTransparency();
    Double bgColorTransparency = gradientLineAreaFill.getMinValueTransparency();

    if (itemPaint instanceof Color) {
        Color itemColor = (Color) itemPaint;
        int red = itemColor.getRed();
        int green = itemColor.getGreen();
        int blue = itemColor.getBlue();
        int mainColorAlpha = (mainColorTransparency >= 0.0 && mainColorTransparency <= 1.0)
                ? Math.round(255 * mainColorTransparency.floatValue())
                : 150;//from w ww . j av  a  2  s.  c  om
        int bgColorAlpha = (bgColorTransparency >= 0.0 && bgColorTransparency <= 1.0)
                ? Math.round(255 * bgColorTransparency.floatValue())
                : 128;

        Color mainColor = new Color(red, green, blue, mainColorAlpha);
        Paint bgColor = getBackgroundPaint();
        if (bgColor == null) {
            bgColor = plot.getBackgroundPaint();
        }
        Color secondaryColor = getSecondaryColor(bgColorAlpha, bgColor);

        Paint areaPaint = getAreaFillPaint(plot, plotWidth, plotHeight, mainColor, secondaryColor);
        g2.setPaint(areaPaint);
    } else {
        g2.setPaint(itemPaint);
    }
}

From source file:org.gumtree.vis.awt.JChartPanel.java

@Override
public Image getImage() {
    BufferedImage image = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics2D g2 = image.createGraphics();
    //      gc2.setBackground(Color.white);
    g2.setPaint(Color.white);
    g2.fill(new Rectangle2D.Double(0, 0, getWidth(), getHeight()));
    if (getChart() != null) {
        Image chartImage = getChart().createBufferedImage((int) getWidth(), (int) getHeight());
        g2.drawImage(chartImage, 0, 0, this);
        ChartMaskingUtilities.drawMasks(g2, getScreenDataArea(), maskList, null, getChart());
    }/*from  www .  j  a v a 2s  .  c  o m*/
    g2.dispose();
    return image;
}

From source file:org.gvsig.remotesensing.scatterplot.chart.ScatterPlotDiagram.java

/**
 * Handles a 'mouse released' event.  On Windows, we need to check if this 
 * is a popup trigger, but only if we haven't already been tracking a zoom
 * rectangle./*  ww w  .  j a  v a  2s. co  m*/
 *
 * @param e  information about the event.
 */
public void mouseReleased(MouseEvent e) {

    if (this.zoomRectangle != null) {
        boolean hZoom = false;
        boolean vZoom = false;
        if (this.orientation == PlotOrientation.HORIZONTAL) {
            hZoom = this.rangeZoomable;
            vZoom = this.domainZoomable;
        } else {
            hZoom = this.domainZoomable;
            vZoom = this.rangeZoomable;
        }

        boolean zoomTrigger1 = hZoom && Math.abs(e.getX() - this.zoomPoint.getX()) >= this.zoomTriggerDistance;
        boolean zoomTrigger2 = vZoom && Math.abs(e.getY() - this.zoomPoint.getY()) >= this.zoomTriggerDistance;
        if (zoomTrigger1 || zoomTrigger2) {
            if ((hZoom && (e.getX() < this.zoomPoint.getX()))
                    || (vZoom && (e.getY() < this.zoomPoint.getY()))) {
                // restoreAutoBounds();
            } else {
                double x, y, w, h;
                Rectangle2D screenDataArea = getScreenDataArea((int) this.zoomPoint.getX(),
                        (int) this.zoomPoint.getY());
                // for mouseReleased event, (horizontalZoom || verticalZoom)
                // will be true, so we can just test for either being false;
                // otherwise both are true
                if (!vZoom) {
                    x = this.zoomPoint.getX();
                    y = screenDataArea.getMinY();
                    w = Math.min(this.zoomRectangle.getWidth(),
                            screenDataArea.getMaxX() - this.zoomPoint.getX());
                    h = screenDataArea.getHeight();
                } else if (!hZoom) {
                    x = screenDataArea.getMinX();
                    y = this.zoomPoint.getY();
                    w = screenDataArea.getWidth();
                    h = Math.min(this.zoomRectangle.getHeight(),
                            screenDataArea.getMaxY() - this.zoomPoint.getY());
                } else {
                    x = this.zoomPoint.getX();
                    y = this.zoomPoint.getY();
                    w = Math.min(this.zoomRectangle.getWidth(),
                            screenDataArea.getMaxX() - this.zoomPoint.getX());
                    h = Math.min(this.zoomRectangle.getHeight(),
                            screenDataArea.getMaxY() - this.zoomPoint.getY());
                }
                if (activeROI != null) {
                    Rectangle2D rectangleArea = new Rectangle2D.Double(x, y, w, h);
                    g2 = (Graphics2D) getGraphics();
                    g2.setPaint(activeROI.getColor());
                    g2.draw(rectangleArea);
                    activeROI.add(rectangleArea, getRange(rectangleArea));
                    RoiFromChartProcess process = new RoiFromChartProcess();
                    process.addParam("roi", activeROI);
                    process.addParam("raster", (FLyrRasterSE) rasterSE);
                    process.setActions(this);
                    process.start();
                    if (gestorRois != null) {
                        // Cargar la nueva ROI en el destor
                        gestorRois.clearRoiGraphics();
                    }
                }

            }
            this.zoomPoint = null;
            this.zoomRectangle = null;
            updateUI();
        } else {
            // Erase the zoom rectangle
            Graphics2D g2 = (Graphics2D) getGraphics();
            drawRectangle(g2);
            g2.dispose();
            this.zoomPoint = null;
            this.zoomRectangle = null;
        }

    }

    else if (e.isPopupTrigger()) {
        if (this.popup != null) {
            displayPopupMenu(e.getX(), e.getY());
        }
    }
}

From source file:Chart.java

 public void paintComponent(Graphics g)
{
   Graphics2D g2 = (Graphics2D) g;

   // compute the minimum and maximum values
   if (values == null) return;
   double minValue = 0;
   double maxValue = 0;
   for (double v : values)
   {//from ww w .j  ava2 s .  c  om
      if (minValue > v) minValue = v;
      if (maxValue < v) maxValue = v;
   }
   if (maxValue == minValue) return;

   int panelWidth = getWidth();
   int panelHeight = getHeight();

   Font titleFont = new Font("SansSerif", Font.BOLD, 20);
   Font labelFont = new Font("SansSerif", Font.PLAIN, 10);

   // compute the extent of the title
   FontRenderContext context = g2.getFontRenderContext();
   Rectangle2D titleBounds = titleFont.getStringBounds(title, context);
   double titleWidth = titleBounds.getWidth();
   double top = titleBounds.getHeight();

   // draw the title
   double y = -titleBounds.getY(); // ascent
   double x = (panelWidth - titleWidth) / 2;
   g2.setFont(titleFont);
   g2.drawString(title, (float) x, (float) y);

   // compute the extent of the bar labels
   LineMetrics labelMetrics = labelFont.getLineMetrics("", context);
   double bottom = labelMetrics.getHeight();

   y = panelHeight - labelMetrics.getDescent();
   g2.setFont(labelFont);

   // get the scale factor and width for the bars
   double scale = (panelHeight - top - bottom) / (maxValue - minValue);
   int barWidth = panelWidth / values.length;

   // draw the bars
   for (int i = 0; i < values.length; i++)
   {
      // get the coordinates of the bar rectangle
      double x1 = i * barWidth + 1;
      double y1 = top;
      double height = values[i] * scale;
      if (values[i] >= 0) y1 += (maxValue - values[i]) * scale;
      else
      {
         y1 += maxValue * scale;
         height = -height;
      }

      // fill the bar and draw the bar outline
      Rectangle2D rect = new Rectangle2D.Double(x1, y1, barWidth - 2, height);
      g2.setPaint(Color.RED);
      g2.fill(rect);
      g2.setPaint(Color.BLACK);
      g2.draw(rect);

      // draw the centered label below the bar
      Rectangle2D labelBounds = labelFont.getStringBounds(names[i], context);

      double labelWidth = labelBounds.getWidth();
      x = x1 + (barWidth - labelWidth) / 2;
      g2.drawString(names[i], (float) x, (float) y);
   }
}

From source file:com.att.aro.main.PacketPlots.java

/**
 * The utility method that creates the packet plots from a packet series map
 *//*w w  w .  ja va 2s  .c o m*/
private XYPlot createPlot() {

    // Create the plot renderer
    YIntervalRenderer renderer = new YIntervalRenderer() {
        private static final long serialVersionUID = 1L;

        public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea,
                PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis,
                XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) {

            // setup for collecting optional entity info...
            Shape entityArea = null;
            EntityCollection entities = null;
            if (info != null) {
                entities = info.getOwner().getEntityCollection();
            }

            IntervalXYDataset intervalDataset = (IntervalXYDataset) dataset;

            double x = intervalDataset.getXValue(series, item);
            double yLow = intervalDataset.getStartYValue(series, item);
            double yHigh = intervalDataset.getEndYValue(series, item);

            RectangleEdge xAxisLocation = plot.getDomainAxisEdge();
            RectangleEdge yAxisLocation = plot.getRangeAxisEdge();

            double xx = domainAxis.valueToJava2D(x, dataArea, xAxisLocation);
            double yyLow = rangeAxis.valueToJava2D(yLow, dataArea, yAxisLocation);
            double yyHigh = rangeAxis.valueToJava2D(yHigh, dataArea, yAxisLocation);

            Paint p = getItemPaint(series, item);
            Stroke s = getItemStroke(series, item);

            Line2D line = null;
            PlotOrientation orientation = plot.getOrientation();
            if (orientation == PlotOrientation.HORIZONTAL) {
                line = new Line2D.Double(yyLow, xx, yyHigh, xx);
            } else if (orientation == PlotOrientation.VERTICAL) {
                line = new Line2D.Double(xx, yyLow, xx, yyHigh);
            }
            g2.setPaint(p);
            g2.setStroke(s);
            g2.draw(line);

            // add an entity for the item...
            if (entities != null) {
                if (entityArea == null) {
                    entityArea = line.getBounds();
                }
                String tip = null;
                XYToolTipGenerator generator = getToolTipGenerator(series, item);
                if (generator != null) {
                    tip = generator.generateToolTip(dataset, series, item);
                }
                XYItemEntity entity = new XYItemEntity(entityArea, dataset, series, item, tip, null);
                entities.add(entity);
            }

        }

    };
    renderer.setAdditionalItemLabelGenerator(null);
    renderer.setBaseShape(new Rectangle());
    renderer.setAutoPopulateSeriesShape(false);
    renderer.setAutoPopulateSeriesPaint(false);
    renderer.setBasePaint(Color.GRAY);

    // Create the plot
    XYPlot plot = new XYPlot(null, null, new NumberAxis(), renderer);
    plot.setRangeAxisLocation(AxisLocation.TOP_OR_LEFT);
    plot.getRangeAxis().setVisible(false);

    return plot;
}