Exemplo n.º 1
0
  /**
   * Paint bar chart with vertical bars.
   *
   * @param g2d The graphics.
   */
  @SuppressWarnings("unchecked")
  private void paintVertical(Graphics2D g2d) {
    int width = getWidth() - 1 - LineChart.padWidth;
    int height = getHeight() - 1 - LineChart.padHeight;

    AffineTransform shift =
        AffineTransform.getTranslateInstance(LineChart.padWidth / 2f, LineChart.padHeight / 2f);
    AffineTransform transform = g2d.getTransform();
    if (transform != null) transform.concatenate(shift);
    else transform = shift;
    g2d.setTransform(transform);

    Toolkit toolkit = (Toolkit) Creator.getToolkit();
    IColorFeature<Color, Graphics2D> colorFeature = toolkit.getFeature(IColorFeature.class);

    // set grid color
    g2d.setColor(getForeground());

    // get label paragraphs
    float maxLabelHeight = 0;
    List<ParagraphLayout> labelLayouts = new ArrayList<ParagraphLayout>();
    for (Plot plot : plots) {
      for (Point point : plot.getPoints()) {
        ParagraphLayout layout =
            new ParagraphLayout(point.label, getFont(), Justify.center, g2d.getFontRenderContext());
        labelLayouts.add(layout);
        if (layout.getHeight() > maxLabelHeight) maxLabelHeight = layout.getHeight();
      }
    }

    // adjust height of graph to accomodate labels
    height -= maxLabelHeight + 3;

    // draw vertical grid-lines
    IScale yscale = (yAxis != null) ? yAxis.getScale() : null;
    if (yscale != null) {
      for (Tick tick : yscale.getTicks()) {
        int y = (int) Math.round(yscale.plot(tick.value) * height);
        g2d.drawLine(0, y, width, y);
      }
    } else {
      for (int i = 0; i < max; i++) {
        int y = (int) Math.round(i * width / max);
        g2d.drawLine(0, y, width, y);
      }
    }

    // ick... get number of points... i hate this schema
    int n = 0;
    for (Plot plot : plots) n += plot.getPoints().size();

    if (n == 0) return;

    // horizontal orientation
    double wbt = width / n;
    double wb = wbt * 0.5;
    double x = wbt / 2;
    for (Plot plot : plots) {
      for (Point point : plot.getPoints()) {
        plotBar.reset();

        double x0 = x - (wb / 2);
        double x1 = x + (wb / 2);
        double y =
            (yscale != null)
                ? yscale.plot(point.coords[0]) * height
                : point.coords[0] * height / max;

        if (y > 0) {
          plotBar.moveTo(x0, height);
          plotBar.lineTo(x0, height - y);
          plotBar.lineTo(x1, height - y);
          plotBar.lineTo(x1, height);
          plotBar.lineTo(x0, height);

          // draw bar
          g2d.setColor(getBackground());
          colorFeature.applyColor(plot.getBackground(), g2d, width, height);
          g2d.fill(plotBar);

          Stroke stroke = strokes.get(plot);
          if (stroke != null) g2d.setStroke(stroke);
          colorFeature.applyColor(plot.getForeground(), g2d, width, height);
          g2d.draw(plotBar);
        }

        // draw text
        colorFeature.applyColor(plot.getForeground(), g2d, width, height);
        ParagraphLayout layout =
            new ParagraphLayout(point.label, getFont(), Justify.center, g2d.getFontRenderContext());
        layout.draw(g2d, (int) (x - (layout.getWidth() / 2)), height + 3);

        x += wbt;
      }
    }
  }
Exemplo n.º 2
0
  /**
   * Paint bar chart with horizontal bars.
   *
   * @param g2d The graphics.
   */
  @SuppressWarnings("unchecked")
  private void paintHorizontal(Graphics2D g2d) {
    int width = getWidth() - 1 - LineChart.padWidth;
    int height = getHeight() - 1 - LineChart.padHeight;

    AffineTransform shift =
        AffineTransform.getTranslateInstance(LineChart.padWidth / 2f, LineChart.padHeight / 2f);
    AffineTransform transform = g2d.getTransform();
    if (transform != null) transform.concatenate(shift);
    else transform = shift;
    g2d.setTransform(transform);

    Toolkit toolkit = (Toolkit) Creator.getToolkit();
    IColorFeature<Color, Graphics2D> colorFeature = toolkit.getFeature(IColorFeature.class);

    // draw gradient background
    //    GradientPaint paint = new GradientPaint( 0, 0, Color.white, 0, height, Color.lightGray);
    //    g2d.setPaint( paint);
    //    g2d.fillRect( 0, 0, width, height);

    // set grid color
    g2d.setColor(getForeground());

    FontMetrics metrics = g2d.getFontMetrics();

    // draw vertical grid-lines
    IScale xscale = (xAxis != null) ? xAxis.getScale() : null;
    if (xscale != null) {
      for (Tick tick : xscale.getTicks()) {
        int x = (int) Math.round(xscale.plot(tick.value) * width);
        g2d.drawLine(x, 0, x, height);
      }
    } else {
      for (int i = 0; i < max; i++) {
        int x = (int) Math.round(i * width / max);
        g2d.drawLine(x, 0, x, height);
      }
    }

    // ick... get number of points... i hate this schema
    int n = 0;
    for (Plot plot : plots) n += plot.getPoints().size();

    // horizontal orientation
    double hbt = height / (n + 1);
    double hb = hbt * 0.75;
    double y = hbt;
    for (Plot plot : plots) {
      for (Point point : plot.getPoints()) {
        plotBar.reset();

        double y0 = y - (hb / 2);
        double y1 = y + (hb / 2);
        double x =
            (xscale != null) ? xscale.plot(point.coords[0]) * width : point.coords[0] * width / max;

        if (x > 0) {
          plotBar.moveTo(0, y0);
          plotBar.lineTo(x, y0);
          plotBar.lineTo(x, y1);
          plotBar.lineTo(0, y1);
          plotBar.lineTo(0, y0);

          // draw bar
          g2d.setColor(getBackground());
          colorFeature.applyColor(plot.getBackground(), g2d, width, height);
          g2d.fill(plotBar);

          Stroke stroke = strokes.get(plot);
          if (stroke != null) g2d.setStroke(stroke);
          colorFeature.applyColor(plot.getForeground(), g2d, width, height);
          g2d.draw(plotBar);
        }

        // draw text
        double textWidth = metrics.stringWidth(point.label);
        double textX = (x / 2) - (textWidth / 2);
        if (textWidth > (x + textPad * 2)) textX = x + textPad;
        g2d.drawString(point.label, (float) textX, (float) (y + metrics.getAscent() / 2));

        y += hbt;
      }
    }
  }