Пример #1
0
  // ========================================================================
  float measureSecondaryYaxisTickLabels(Paint hash_mark_label_paint) {

    MinMax y_secondary_span = mRenderer.getYSecondaryAxisSpan();

    Rect text_bounds_holder = new Rect();

    List<Integer> y_secondary_label_widths = new ArrayList<Integer>();
    for (Double ylabel : MathHelper.getLabels(y_secondary_span, mRenderer.getSecondaryYLabels())) {
      String y_label = getLabel(ylabel, Axis.Y_AXIS_SECONDARY);
      hash_mark_label_paint.getTextBounds(y_label, 0, y_label.length(), text_bounds_holder);

      int label_width = text_bounds_holder.width();
      y_secondary_label_widths.add(label_width);
    }
    float max_label_width = Collections.max(y_secondary_label_widths);

    return max_label_width + VERTICAL_AXIS_LINE_LABEL_CLEARANCE;
  }
Пример #2
0
  protected void drawVerticalAxisLabels(
      Canvas canvas,
      Rect frame,
      Paint hash_mark_label_paint,
      double yPixelsPerUnit,
      double ySecondaryPixelsPerUnit,
      float vertical_axis_hash_mark_width,
      float vertical_secondary_axis_hash_mark_width) {

    MinMax y_span = mRenderer.getYPrimaryAxisSpan();

    List<Double> yLabels = MathHelper.getLabels(y_span, mRenderer.getYLabels());

    List<List<Double>> vertical_axis_datasets = new ArrayList<List<Double>>();
    List<MinMax> vertical_axis_spans = new ArrayList<MinMax>();
    vertical_axis_datasets.add(yLabels);
    vertical_axis_spans.add(y_span);
    if (mRenderer.hasSecondaryYAxis()) {
      MinMax secondary_span = mRenderer.getYSecondaryAxisSpan();
      vertical_axis_datasets.add(
          MathHelper.getLabels(secondary_span, mRenderer.getSecondaryYLabels()));
      vertical_axis_spans.add(secondary_span);
    }

    double[] vertical_pixels_per_unit = new double[] {yPixelsPerUnit, ySecondaryPixelsPerUnit};
    for (int vertical_axis_index = 0;
        vertical_axis_index < vertical_axis_datasets.size();
        vertical_axis_index++) {
      //			List<Double> vertical_labels = vertical_axis_datasets.get(0);
      List<Double> vertical_labels = vertical_axis_datasets.get(vertical_axis_index);

      MinMax label_span = vertical_axis_spans.get(vertical_axis_index);

      hash_mark_label_paint.setTextAlign(label_alignments[vertical_axis_index]);
      for (int i = 0; i < vertical_labels.size(); i++) {
        double label = vertical_labels.get(i);
        float label_value =
            (float)
                (frame.bottom
                    - vertical_pixels_per_unit[vertical_axis_index]
                        * (label - label_span.min.doubleValue()));

        float grid_line_startx, grid_line_stopx, hash_mark_startx, hash_mark_stopx;
        float label_x_offset;

        if (vertical_axis_index == 0) {

          grid_line_startx = frame.left;
          grid_line_stopx = frame.right;
          hash_mark_startx = grid_line_startx - vertical_axis_hash_mark_width;
          hash_mark_stopx = grid_line_startx;

          label_x_offset = frame.left - VERTICAL_AXIS_LINE_LABEL_CLEARANCE;

        } else {

          grid_line_startx = frame.left;
          grid_line_stopx = frame.right;
          hash_mark_startx = grid_line_stopx;
          hash_mark_stopx = grid_line_stopx + vertical_secondary_axis_hash_mark_width;

          label_x_offset = frame.right + VERTICAL_AXIS_LINE_LABEL_CLEARANCE;
        }

        if (mRenderer.isShowLabels()) {
          hash_mark_label_paint.setColor(grid_line_colors[vertical_axis_index]);
          //					hash_mark_label_paint.setColor(mRenderer.getLabelsColor());	// XXX
          canvas.drawLine(
              hash_mark_startx, label_value, hash_mark_stopx, label_value, hash_mark_label_paint);

          String label_string = getLabel(label, vertical_axis_enums[vertical_axis_index]);
          hash_mark_label_paint.measureText(label_string);
          drawText(
              canvas,
              getLabel(label, vertical_axis_enums[vertical_axis_index]),
              label_x_offset,
              label_value - VERTICAL_AXIS_LABEL_HASH_MARK_CLEARANCE,
              hash_mark_label_paint,
              0);
        }

        if (mRenderer.isShowGrid() && mRenderer.isShowGridHorizontalLines()) {
          hash_mark_label_paint.setColor(grid_line_colors[vertical_axis_index]);
          hash_mark_label_paint.setPathEffect(grid_line_path_effects[vertical_axis_index]);
          canvas.drawLine(
              grid_line_startx, label_value, grid_line_stopx, label_value, hash_mark_label_paint);

          hash_mark_label_paint.setPathEffect(null);
        }
      }
    }
  }
Пример #3
0
  // ========================================================================
  void drawAllDataSets(
      Canvas canvas,
      Rect frame,
      Paint hash_mark_label_paint,
      double xPixelsPerUnit,
      double yPixelsPerUnit,
      double ySecondaryPixelsPerUnit) {
    //			double xPixelsPerUnit, double ySecondaryPixelsPerUnit) {

    MinMax x_span = mRenderer.getXAxisSpan();

    for (int i = 0; i < mDataset.getSeriesCount(); i++) {
      XYSeries series = mDataset.getSeriesAt(i);
      if (series.getItemCount() == 0) {
        continue;
      }

      SimpleSeriesRenderer seriesRenderer = mRenderer.getSeriesRendererAt(i);

      MinMax vertical_series_span;
      double vertical_pixels_per_unit;
      if (mRenderer.hasSecondaryYAxis() && seriesRenderer.getUsesSecondaryAxis()) {
        vertical_series_span = mRenderer.getYSecondaryAxisSpan();
        vertical_pixels_per_unit = ySecondaryPixelsPerUnit;
      } else {
        vertical_series_span = mRenderer.getYPrimaryAxisSpan();
        vertical_pixels_per_unit = yPixelsPerUnit;
      }

      List<PointF> points = new ArrayList<PointF>();
      for (int j = 0; j < series.getItemCount(); j++) {
        PointF point =
            new PointF(
                (float)
                    (frame.left
                        + xPixelsPerUnit
                            * (series.getX(j).doubleValue() - x_span.min.doubleValue())),
                (float)
                    (frame.bottom
                        - vertical_pixels_per_unit
                            * (series.getY(j).doubleValue()
                                - vertical_series_span.min.doubleValue())));
        points.add(point);
      }

      drawSeries(
          canvas,
          hash_mark_label_paint,
          points,
          seriesRenderer,
          (float) xPixelsPerUnit,
          (float) vertical_pixels_per_unit,
          Math.min(
              frame.bottom,
              (float)
                  (frame.bottom
                      + vertical_pixels_per_unit * vertical_series_span.min.doubleValue())),
          i);

      // Render glyphs atop the chart if necessary
      if (isRenderPoints(seriesRenderer)) {
        ScatterChart pointsChart = new ScatterChart(mDataset, mRenderer);
        pointsChart.drawSeries(
            canvas,
            hash_mark_label_paint,
            points,
            seriesRenderer,
            (float) xPixelsPerUnit,
            (float) vertical_pixels_per_unit,
            0,
            i);
      }

      hash_mark_label_paint.setTextSize(DEFAULT_HASH_MARK_TEXT_SIZE);
      if (Orientation.HORIZONTAL.equals(mRenderer.getOrientation())) {
        hash_mark_label_paint.setTextAlign(Align.CENTER);
      } else {
        hash_mark_label_paint.setTextAlign(Align.LEFT);
      }
      if (mRenderer.isDisplayChartValues()) {
        drawChartValuesText(canvas, series, hash_mark_label_paint, points, i);
      }
    }
  }
Пример #4
0
  /**
   * The graphical representation of the XY chart.
   *
   * @param canvas the canvas to paint to
   * @param x the top left x value of the view to draw to
   * @param y the top left y value of the view to draw to
   * @param width the width of the view to draw to
   * @param height the height of the view to draw to
   */
  @Override
  public void draw(Canvas canvas, int width, int height) {

    TextPaint hash_mark_label_paint = new TextPaint();
    hash_mark_label_paint.setTextSize(DEFAULT_HASH_MARK_TEXT_SIZE);
    hash_mark_label_paint.setTypeface(DefaultRenderer.REGULAR_TEXT_FONT);
    hash_mark_label_paint.setAntiAlias(getAntiAliased());

    boolean rotate = Orientation.VERTICAL.equals(mRenderer.getOrientation());
    mScale = (float) (height) / width;
    mTranslate = Math.abs(width - height) / 2;
    if (mScale < 1) {
      mTranslate *= -1;
    }
    mCenter = new PointF(width / 2, height / 2);
    if (rotate) {
      transform(canvas, mRenderer.getOrientation().getAngle(), false);
    }

    MinMax x_span = mRenderer.getXAxisSpan();

    float vertical_axis_hash_mark_width = 0;
    float vertical_secondary_axis_hash_mark_width = 0;
    float horizontal_axis_label_height = 0;

    // Measure all y-axis label widths to determine the axis line position
    if (mRenderer.isShowLabels() && mRenderer.getShowYAxis()) {
      vertical_axis_hash_mark_width = measurePrimaryYaxisTickLabels(hash_mark_label_paint);

      if (mRenderer.hasSecondaryYAxis()) {
        Log.e(TAG, "Has secondary axis!!!");
        vertical_secondary_axis_hash_mark_width =
            measureSecondaryYaxisTickLabels(hash_mark_label_paint);
      }
    }

    if (mRenderer.isShowLabels() && mRenderer.getShowXAxis()) {
      horizontal_axis_label_height = measureXaxisTickLabels(hash_mark_label_paint, x_span);
    }

    Rect frame =
        new Rect(
            (int) Math.ceil(vertical_axis_hash_mark_width),
            0,
            width - (int) Math.ceil(vertical_secondary_axis_hash_mark_width),
            height - (int) horizontal_axis_label_height);

    double xPixelsPerUnit = getPixelsPerUnit(frame.width(), x_span);
    double yPixelsPerUnit = getPixelsPerUnit(frame.height(), mRenderer.getYPrimaryAxisSpan());
    double ySecondaryPixelsPerUnit = 0;
    if (mRenderer.hasSecondaryYAxis())
      ySecondaryPixelsPerUnit = getPixelsPerUnit(frame.height(), mRenderer.getYSecondaryAxisSpan());

    if (mRenderer.isShowLabels() || mRenderer.isShowGrid()) {

      List<Double> xLabels = MathHelper.getLabels(x_span, mRenderer.getXLabels());
      if (mRenderer.isShowLabels()) {
        hash_mark_label_paint.setColor(mRenderer.getLabelsColor());
        hash_mark_label_paint.setTextAlign(Align.CENTER);
      }

      drawXLabels(
          xLabels,
          mRenderer.getXTextLabelLocations(),
          canvas,
          hash_mark_label_paint,
          frame.left,
          frame.top,
          frame.bottom,
          xPixelsPerUnit,
          x_span.min.doubleValue(),
          DEFAULT_HORIZONTAL_AXIS_HASH_MARK_LENGTH,
          horizontal_axis_label_height - DEFAULT_HORIZONTAL_AXIS_HASH_MARK_LENGTH);

      drawVerticalAxisLabels(
          canvas,
          frame,
          hash_mark_label_paint,
          yPixelsPerUnit,
          ySecondaryPixelsPerUnit,
          vertical_axis_hash_mark_width,
          vertical_secondary_axis_hash_mark_width);
    }

    // This draws the plot boundaries.
    drawPlotBoundaries(canvas, frame, hash_mark_label_paint);

    // This draws the plot boundaries.
    drawAllDataSets(
        canvas,
        frame,
        hash_mark_label_paint,
        xPixelsPerUnit,
        yPixelsPerUnit,
        ySecondaryPixelsPerUnit);

    if (rotate) {
      transform(canvas, mRenderer.getOrientation().getAngle(), true);
    }
  }