class Selection in Flot 8

Display a chart that demonstrates region selection and zooming.

Hierarchy

• class \Drupal\Core\Controller\ControllerBase implements ContainerInjectionInterface uses LoggerChannelTrait, MessengerTrait, LinkGeneratorTrait, RedirectDestinationTrait, UrlGeneratorTrait, StringTranslationTrait
  • class \Drupal\flot_examples\Controller\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

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

Name	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.