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class Selection in Flot 8

Display a chart that demonstrates region selection and zooming.

Hierarchy

Expanded class hierarchy of Selection

1 string reference to 'Selection'
flot_examples.routing.yml in flot_examples/flot_examples.routing.yml
flot_examples/flot_examples.routing.yml

File

flot_examples/src/Controller/Selection.php, line 10

Namespace

Drupal\flot_examples\Controller
View source
class Selection extends ControllerBase {

  /**
   * Selection.
   */
  public function content() {
    $data = $this::readData();
    $options = [
      'series' => [
        'lines' => [
          'show' => TRUE,
        ],
        'points' => [
          'show' => TRUE,
        ],
      ],
      'legend' => [
        'noColumns' => 2,
      ],
      'xaxis' => [
        'tickDecimals' => 0,
      ],
      'yaxis' => [
        'min' => 0,
      ],
      'selection' => [
        'mode' => 'x',
      ],
    ];
    $text = [];
    $array = [
      ':one' => 'http://en.wikipedia.org/wiki/List_of_countries_by_carbon_dioxide_emissions_per_capita',
    ];
    $text[] = $this
      ->t('1000 kg. CO<sub>2</sub> emissions per year per capita for various countries (source: <a href=":one">Wikipedia</a>).', $array);
    $text[] = $this
      ->t('Flot supports selections through the selection plugin. You can enable rectangular selection or one-dimensional selection if the user should only be able to select on one axis. Try left-click and drag on the plot above where selection on the x axis is enabled.');
    $text[] = $this
      ->t('You selected: <span id="selection"></span>');
    $text[] = $this
      ->t('The plot command returns a plot object you can use to control the selection. Click the buttons below.');
    $text[] = [
      [
        '#type' => 'button',
        '#value' => $this
          ->t('Clear selection'),
        '#attributes' => [
          'id' => [
            'clearSelection',
          ],
        ],
      ],
      [
        '#type' => 'button',
        '#value' => $this
          ->t('Select year 1994'),
        '#attributes' => [
          'id' => [
            'setSelection',
          ],
        ],
      ],
    ];
    $text[] = $this
      ->t('Selections are really useful for zooming. Just replot the chart with min and max values for the axes set to the values in the "plotselected" event triggered. Enable the checkbox below and select a region again.');
    $text[] = [
      [
        '#type' => 'checkbox',
        '#attributes' => [
          'id' => [
            'zoom',
          ],
        ],
        '#title' => $this
          ->t('Zoom to selection'),
      ],
    ];
    $output['flot'] = [
      '#type' => 'flot',
      '#theme' => 'flot_examples',
      '#data' => $data,
      '#options' => $options,
      '#attached' => [
        'library' => [
          'flot_examples/selection',
        ],
      ],
      '#text' => $text,
    ];
    return $output;
  }

  /**
   * Fetch the raw data from the data file.
   */
  private function readData() {
    $filename = "CO2CountryData.txt";
    $file_path = DRUPAL_ROOT . '/' . drupal_get_path('module', 'flot_examples') . '/src/Controller/' . $filename;
    $file = fopen($file_path, "r") or die("Unable to open file: {$file_path}");
    $countries = [
      $this
        ->t("United States"),
      $this
        ->t("Russia"),
      $this
        ->t("United Kingdom"),
      $this
        ->t("Germany"),
      $this
        ->t("Denmark"),
      $this
        ->t("Sweden"),
      $this
        ->t("Norway"),
    ];
    $data = [];
    foreach ($countries as $key => $country) {
      $data[$key]['label'] = $country;
    }
    while (!feof($file)) {
      $line = fgets($file);
      $values = explode(', ', $line);
      if (count($values) > 1) {
        foreach ($countries as $key => $country) {
          if ($values[$key + 1] != "") {
            $data[$key]['data'][] = [
              $values[0],
              $values[$key + 1],
            ];
          }
        }
      }
    }
    fclose($file);
    return $data;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
ControllerBase::$configFactory protected property The configuration factory.
ControllerBase::$currentUser protected property The current user service. 1
ControllerBase::$entityFormBuilder protected property The entity form builder.
ControllerBase::$entityManager protected property The entity manager.
ControllerBase::$entityTypeManager protected property The entity type manager.
ControllerBase::$formBuilder protected property The form builder. 2
ControllerBase::$keyValue protected property The key-value storage. 1
ControllerBase::$languageManager protected property The language manager. 1
ControllerBase::$moduleHandler protected property The module handler. 2
ControllerBase::$stateService protected property The state service.
ControllerBase::cache protected function Returns the requested cache bin.
ControllerBase::config protected function Retrieves a configuration object.
ControllerBase::container private function Returns the service container.
ControllerBase::create public static function Instantiates a new instance of this class. Overrides ContainerInjectionInterface::create 40
ControllerBase::currentUser protected function Returns the current user. 1
ControllerBase::entityFormBuilder protected function Retrieves the entity form builder.
ControllerBase::entityManager Deprecated protected function Retrieves the entity manager service.
ControllerBase::entityTypeManager protected function Retrieves the entity type manager.
ControllerBase::formBuilder protected function Returns the form builder service. 2
ControllerBase::keyValue protected function Returns a key/value storage collection. 1
ControllerBase::languageManager protected function Returns the language manager service. 1
ControllerBase::moduleHandler protected function Returns the module handler. 2
ControllerBase::redirect protected function Returns a redirect response object for the specified route. Overrides UrlGeneratorTrait::redirect
ControllerBase::state protected function Returns the state storage service.
LinkGeneratorTrait::$linkGenerator protected property The link generator. 1
LinkGeneratorTrait::getLinkGenerator Deprecated protected function Returns the link generator.
LinkGeneratorTrait::l Deprecated protected function Renders a link to a route given a route name and its parameters.
LinkGeneratorTrait::setLinkGenerator Deprecated public function Sets the link generator service.
LoggerChannelTrait::$loggerFactory protected property The logger channel factory service.
LoggerChannelTrait::getLogger protected function Gets the logger for a specific channel.
LoggerChannelTrait::setLoggerFactory public function Injects the logger channel factory.
MessengerTrait::$messenger protected property The messenger. 29
MessengerTrait::messenger public function Gets the messenger. 29
MessengerTrait::setMessenger public function Sets the messenger.
RedirectDestinationTrait::$redirectDestination protected property The redirect destination service. 1
RedirectDestinationTrait::getDestinationArray protected function Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination protected function Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination public function Sets the redirect destination service.
Selection::content public function Selection.
Selection::readData private function Fetch the raw data from the data file.
StringTranslationTrait::$stringTranslation protected property The string translation service. 1
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language.
UrlGeneratorTrait::$urlGenerator protected property The url generator.
UrlGeneratorTrait::getUrlGenerator Deprecated protected function Returns the URL generator service.
UrlGeneratorTrait::setUrlGenerator Deprecated public function Sets the URL generator service.
UrlGeneratorTrait::url Deprecated protected function Generates a URL or path for a specific route based on the given parameters.