Form: Allow to set a progress label

refs #8369

library/Icinga/Web/Form.php

@@ -81,6 +81,13 @@ class Form extends Zend_Form
      */
     protected $submitLabel;
 
+    /**
+     * Label to use for showing the user an activity indicator when submitting the form
+     *
+     * @var string
+     */
+    protected $progressLabel;
+
     /**
      * The url to redirect to upon success
      *
@@ -263,6 +270,29 @@ class Form extends Zend_Form
         return $this->submitLabel;
     }
 
+    /**
+     * Set the label to use for showing the user an activity indicator when submitting the form
+     *
+     * @param   string  $label
+     *
+     * @return  $this
+     */
+    public function setProgressLabel($label)
+    {
+        $this->progressLabel = $label;
+        return $this;
+    }
+
+    /**
+     * Return the label to use for showing the user an activity indicator when submitting the form
+     *
+     * @return  string
+     */
+    public function getProgressLabel()
+    {
+        return $this->progressLabel;
+    }
+
     /**
      * Set the url to redirect to upon success
      *
@@ -738,9 +768,10 @@ class Form extends Zend_Form
                 'submit',
                 'btn_submit',
                 array(
-                    'ignore'        => true,
+                    'ignore'                => true,
-                    'label'         => $submitLabel,
+                    'label'                 => $submitLabel,
-                    'decorators'    => array(
+                    'data-progress-label'   => $this->getProgressLabel(),
+                    'decorators'            => array(
                         'ViewHelper',
                         array('HtmlTag', array('tag' => 'div'))
                     )