refs #1915 added missing method to delete all viewdatatableparams, metricsToPlot should be saved now as well

1 files changed, 10 insertions, 4 deletions

diff --git a/plugins/ExampleUI/Controller.php b/plugins/ExampleUI/Controller.php
index d4dd15c3b3..5dd0e9bb52 100644
--- a/plugins/ExampleUI/Controller.php
+++ b/plugins/ExampleUI/Controller.php
@@ -46,7 +46,7 @@ class Controller extends \Piwik\Plugin\Controller
         $view = new View('@ExampleUI/evolutiongraph');
 
         $this->setPeriodVariablesView($view);
-        $view->evolutionGraph = $this->getEvolutionGraph(array('server1', 'server2'));
+        $view->evolutionGraph = $this->getEvolutionGraph(array(), array('server1', 'server2'));
 
         return $view->render();
     }
@@ -78,17 +78,23 @@ class Controller extends \Piwik\Plugin\Controller
         return $view->render();
     }
 
-    public function getEvolutionGraph(array $columns = array())
+    public function getEvolutionGraph(array $columns = array(), array $defaultColumns = array())
     {
         if (empty($columns)) {
-            $columns = Common::getRequestVar('columns');
-            $columns = Piwik::getArrayFromApiParameter($columns);
+            $columns = Common::getRequestVar('columns', false);
+            if (false !== $columns) {
+                $columns = Piwik::getArrayFromApiParameter($columns);
+            }
         }
 
         $view = $this->getLastUnitGraphAcrossPlugins($this->pluginName, __FUNCTION__, $columns,
             $selectableColumns = array('server1', 'server2'), 'My documentation', 'ExampleUI.getTemperaturesEvolution');
         $view->requestConfig->filter_sort_column = 'label';
 
+        if (empty($view->config->columns_to_display) && !empty($defaultColumns)) {
+            $view->config->columns_to_display = $defaultColumns;
+        }
+
         return $this->renderView($view);
     }