charts_bluff.class.inc in Charts and Graphs 6

Implementation of abstract class ChartCanvas for Bluff library.

File

apis/charts_bluff/charts_bluff.class.inc

<?php

/**
 * @file
 *   Implementation of abstract class ChartCanvas for Bluff library.
 *
 */

/**
 * Implementation of abstract class ChartCanvas for Bluff library.
 */
class ChartsBluff extends ChartCanvas {
  var $width = 450;
  var $height = 200;
  var $theme = '37signals';
  var $title = '';
  var $title_font_size = 32;

  /**
   * Optional parameter.
   *
   * If set to TRUE, will cause Bluff to pick the opposite data orientation to
   * the one it would have picked automatically. This orientation defines if
   * each column or each row is one data serie.
   *
   * @var <bool>
   */
  var $transpose = NULL;

  /*
   * Function that preprocesses generalized data structure and saves it in the
   * form suitable for specific charting implementation.
   *
   * @see ChartCanvas::set_data()
   */
  public function set_data($rows, $x_labels) {
    $this->series = $rows;
    $this->x_labels = $x_labels;
  }
  protected function _get_translated_chart_type() {
    switch ($this->type) {
      case 'mini_bar':
        $type = 'Mini.Bar';
        break;
      case 'mini_pie':
        $type = 'Mini.Pie';
        break;
      case 'mini_side_bar':
        $type = 'Mini.SideBar';
        break;
      case 'side_bar':
        $type = 'SideBar';
        break;
      case 'stacked_side_bar':
        $type = 'SideStackedBar';
        break;
      case 'stacked_area':
        $type = 'StackedArea';
        break;
      case 'stacked_bar':
        $type = 'StackedBar';
        break;
      default:
        $type = ucfirst($this->type);
    }
    return $type;
  }

  /**
   * Function that renders data.
   */
  public function get_chart() {
    $bluff_js_files = $this
      ->get_bluff_js_files();
    foreach ($bluff_js_files as $file_path) {
      drupal_add_js($file_path);
    }
    $bluff_path = drupal_get_path('module', 'charts_bluff');
    drupal_add_css($bluff_path . '/charts_bluff.css');
    $x_labels = $this->x_labels;
    $series = $this->series;
    $chart_id = 'bluffchart-' . chart_graphs_chart_id_generator();
    $table = array();
    $table[] = sprintf('
      <table id="%s" class="bluff-data-table">
        <caption>%s</caption>
        <thead>
          <tr>
            <th scope="col"></th>', $chart_id, $this->title);
    $cols = array_keys($series);
    foreach ($cols as $col) {
      $table[] = sprintf('<th scope="col">%s</th>', $col);
    }
    $table[] = '</tr></thead><tbody>';
    foreach ($x_labels as $key => $label) {
      $table[] = '<tr>';
      $cols = array(
        $label,
      );
      foreach ($series as $serie) {
        $cols[] = $serie[$key];
      }
      $table[] = sprintf('<th scope="row">%s</th>', array_shift($cols));
      foreach ($cols as $col) {
        $table[] = sprintf('<td>%s</td>', (string) $col);
      }
      $table[] = '</tr>';
    }
    $table[] = '</tbody></table>';
    $is_pie_chart = $this->type == 'pie';
    $transpose = isset($this->transpose) ? $this->transpose : $is_pie_chart;
    $html = implode('', $table);
    $javascript = '<canvas id="%chart_id-graph" width="%width" height="%height"></canvas>
      <script type="text/javascript">
        var ChartsAndGraphs = ChartsAndGraphs || {};

        ChartsAndGraphs.init = function() {
          var g = new Bluff.%type("%chart_id-graph", "%widthx%height");
          g.marker_font_size = 20;
          g.hide_legend = true;
          g.hide_title = false;
          g.sort = false;
          g.title_font_size = %title_font_size;
          g.theme_%theme();
          g.data_from_table("%chart_id", %transpose);
          g.draw();

          var g_labels = %json_encode;
          var legend = ["<ul class=\\"bluff-legend\\">"];

          for (var i = 0, j = 0, color; i < g_labels.length; i++, j++) {
            if (g.colors[j]) {
              color = g.colors[j]
            }
            else {
              g.colors[(0)];
              j = -1;
            }
            legend.push("<li>");
            legend.push("<div style=\\"background-color: " + color + "\\"><\\/div>" + g_labels[i]);
            legend.push("<\\/li>");
          }

          legend.push("<\\/ul>");

          $("#%chart_id-graph")
            .parent("div.bluff-wrapper")
            .append(legend.join(""))
            .css({height: "auto"});
        }

        $(window).load(ChartsAndGraphs.init);

        Drupal.behaviors.ChartsAndGraphs_init = function(context) {
          ChartsAndGraphs.init();
        }
      </script>';
    $javascript = strtr($javascript, array(
      '%chart_id' => $chart_id,
      '%type' => $this
        ->_get_translated_chart_type(),
      '%width' => $this->width,
      '%height' => $this->height,
      '%theme' => $this->theme,
      '%transpose' => $transpose ? 'true' : 'false',
      '%title_font_size' => (int) $this->title_font_size,
      '%json_encode' => json_encode($is_pie_chart ? $x_labels : array_keys($series)),
    ));
    return $html . $javascript;
  }

  /**
   * Cache list of javascript files for performance.
   */
  function get_bluff_js_files() {
    static $js_files = NULL;
    if (is_array($js_files)) {
      return $js_files;
    }
    $bluff_path = drupal_get_path('module', 'charts_bluff');
    $bluff_files = array_map('basename', glob(dirname(__FILE__) . '/bluff/*.js'));
    rsort($bluff_files);
    $js_files = array();
    foreach ($bluff_files as $bluff_file) {
      $file_path = sprintf('%s/bluff/%s', $bluff_path, $bluff_file);
      $js_files[] = $file_path;
    }
    return $js_files;
  }

}

Classes

Name	Description
ChartsBluff	Implementation of abstract class ChartCanvas for Bluff library.