Added ActiveForm ajax submit support

Added ActiveForm ajax submit support. Now you can use the param
useWithActiveForm to specify the name of the ActiveForm. Client
validation and ajax submit is working!

Author: demogorgorn

AjaxSubmitButton.php

@@ -66,8 +66,18 @@ class AjaxSubmitButton extends Widget
 	 * @var boolean whether the label should be HTML-encoded.
 	 */
 	public $encodeLabel = true;
-
+    /**
+     * @var string js object name.
+     *      it is unused when useWithActiveForm is enabled
+     */
     public $clickedButtonVarName = '_clickedButton';
+    /**
+     * @var boolean whether the button should not be used with ActiveForm.
+     *      string the id of ActiveForm to use the button with 
+     */
+    public $useWithActiveForm = false;
+
+
 
 	/**
 	 * Initializes the widget.
@@ -88,7 +98,11 @@ public function run()
     	echo Html::tag($this->tagName, $this->encodeLabel ? Html::encode($this->label) : $this->label, $this->options);
 
         if (!empty($this->ajaxOptions)) {
-            $this->registerAjaxScript();
+            
+            if ($this->useWithActiveForm !== false)
+                $this->registerAjaxFormScript();
+            else
+                $this->registerAjaxScript();
         }
     }
 
@@ -115,5 +129,37 @@ protected function registerAjaxScript()
             });");
     }
 
+    protected function registerAjaxFormScript()
+    {
+        $view = $this->getView();
+
+        if(!isset($this->ajaxOptions['type'])) {
+            $this->ajaxOptions['type'] = new JsExpression('$(this).attr("method")');
+        }
+
+        if(!isset($this->ajaxOptions['url'])) {
+            $this->ajaxOptions['url'] = new JsExpression('$(this).attr("action")');
+        }
+
+        if(!isset($this->ajaxOptions['data']) && isset($this->ajaxOptions['type']))
+            $this->ajaxOptions['data'] = new JsExpression('$(this).serialize()');
+
+        $this->ajaxOptions= Json::encode($this->ajaxOptions);
+
+$js = <<<SEL
+        $(document).on('beforeSubmit', "#{$this->useWithActiveForm}", function () {
+            if ($(this).find('.has-error').length < 1) {
+                $.ajax({$this->ajaxOptions});
+            }
+            return false; // Cancel form submitting.
+        });
+SEL;
+
+        $view->registerJs($js);
+
+
+
+    }
+
 }