protected function ChartsGraphsGoogleCharts::_encode_data in Charts and Graphs 7

Same name and namespace in other branches

1. 6.2 apis/charts_graphs_google_charts/charts_graphs_google_charts.class.inc \ChartsGraphsGoogleCharts::_encode_data()

1 call to ChartsGraphsGoogleCharts::_encode_data()

ChartsGraphsGoogleCharts::_get_url in apis/charts_graphs_google_charts/charts_graphs_google_charts.class.inc

File

apis/charts_graphs_google_charts/charts_graphs_google_charts.class.inc, line 104

Implementation of abstract class ChartsGraphsCanvas for Google Charts library.

Class

ChartsGraphsGoogleCharts

Implementation of abstract class ChartsGraphsCanvas for Google Charts library.

Code

protected function _encode_data() {
  $series = $this->series;
  $is_stacked = strpos($this->type, 'stacked') !== FALSE;

  // Use zero as initial min to guarantee that the y axis show zero.
  $min_y = 0;
  $max_y = $is_stacked ? 0 : reset(reset($series));
  $chds = '';
  $chd = array();
  $chdl = array();
  $is_pie = strpos($this->type, 'pie') !== FALSE;
  foreach ($series as $serie_name => $serie) {
    if (!$is_pie) {
      $chdl[] = $serie_name;
    }
    $min_serie = 0;
    $max_serie = reset($serie);
    $serie_as_string = '';
    foreach ($serie as $val) {
      $serie_as_string .= ',' . drupal_encode_path($val);
      if ($val < $min_serie) {
        $min_serie = $val;
      }
      elseif ($val > $max_serie) {
        $max_serie = $val;
      }
    }
    if ($min_serie < $min_y) {
      $min_y = $min_serie;
    }
    if ($is_stacked) {
      $max_y += $max_serie;
    }
    else {
      if ($max_serie > $max_y) {
        $max_y = $max_serie;
      }
    }
    if (strlen($serie_as_string)) {
      $serie_as_string = substr($serie_as_string, 1);
    }
    $chd[] = $serie_as_string;
  }

  /**
   * Applying user defined min and max y axis values.
   */
  if (isset($this->y_min)) {
    $min_y = $this->y_min;
  }
  if (isset($this->y_max)) {
    $max_y = $this->y_max;
  }
  $chds = drupal_encode_path($min_y) . ',' . drupal_encode_path($max_y);
  if ($is_pie) {
    $chdl = $this->x_labels;
    $chl = reset($this->series);
  }
  $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_DATA_PARAMETER] = CHARTS_GRAPHS_GOOGLE_CHARTS_DATA_STARTER . implode('|', $chd);
  $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_LEGEND] = implode('|', $chdl);
  if ($is_pie) {
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_PIE_LABELS] = implode('|', $chl);
  }
  else {
    if (strpos($this->type, 'side') === FALSE) {
      $scale_axis_identifier = 1;
      $text_labels_axis_identifier = 0;
      $y_legend_axis = ',y';
    }
    else {
      $scale_axis_identifier = 0;
      $text_labels_axis_identifier = 1;
      $y_legend_axis = ',x';
    }
    if ($this->y_legend) {
      $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_VISIBLE_AXIS_PARAMETER] .= $y_legend_axis;
      $y_legend = '2:|' . drupal_encode_path($this->y_legend) . '|';
      $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_LABEL_POSITION] = '2,50';
    }
    else {
      $y_legend = '';
    }
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_CUSTOM_AXIS_LABELS] = $y_legend . $text_labels_axis_identifier . ':' . $this
      ->_get_encoded_text_labels();
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_MIN_MAX_PER_SERIE_PARAMETER] = $chds;
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_VISIBLE_AXIS_PARAMETER] = 'x,y';

    /**
     * Applying user defined min and max y axis values.
     */
    if (isset($this->y_min)) {
      $min_y = $this->y_min;
    }
    if (isset($this->y_max)) {
      $max_y = $this->y_max;
    }
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_AXIS_RANGE_PARAMETER] = $scale_axis_identifier . ',' . drupal_encode_path($min_y) . ',' . drupal_encode_path($max_y);

    /**
     * Applying user defined step for y axis values.
     */
    if (isset($this->y_step)) {
      $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_AXIS_RANGE_PARAMETER] .= ',' . $this->y_step;
    }
  }
  $colour_count = $this->colour_count_series ? count($series) : count(reset($series));
  $colours = array_slice($this
    ->series_colours(), 0, $colour_count);
  $pure_hex_colours = array();
  foreach ($colours as $colour) {
    $pure_hex_colours[] = substr($colour, -6);
  }
  $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_SERIES_COLOUR] = implode(',', $pure_hex_colours);
  if ($this->type == 'area') {
    $fill_colour = array();
    $i = 0;
    foreach ($pure_hex_colours as $colour) {
      $fill_colour[] = sprintf('%s,%s,%u,0,0', CHARTS_GRAPHS_GOOGLE_CHARTS_AREA_MARKER_STYLE, $colour, $i);
      $i++;
    }
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_MARKER_STYLE] = implode('|', $fill_colour);
  }
  if ($this->legend_pos) {
    switch ($this->legend_pos) {
      case 'top':
        $chdlp = 't';
        break;
      case 'bottom':
        $chdlp = 'b';
        break;
      case 'top_vert':
        $chdlp = 'tv';
        break;
      case 'bottom_vert':
        $chdlp = 'bv';
        break;
      case 'left':
        $chdlp = 'l';
        break;
      default:
        $chdlp = 'r';
    }
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_LEGEND_POSITION] = $chdlp;
  }
  if ($this->title_colour) {
    $this->parameters_to_send[CHARTS_GRAPHS_GOOGLE_CHARTS_CHART_TITLE_COLOUR] = $this->title_colour;
  }
}