Method refresh

examples/pil_app.py:48–68

(self, *args)

        return self.search_app_instance(node.get_parent()) 

    def refresh(self, *args):
        if self.app_instance==None:
            self.app_instance = self.search_app_instance(self)
            if self.app_instance==None:
                return
        self.frame_index = self.frame_index + 1
        self.app_instance.execute_javascript("""
            url = '/%(id)s/get_image_data?index=%(frame_index)s';
            
            xhr = null;
            xhr = new XMLHttpRequest();
            xhr.open('GET', url, true);
            xhr.responseType = 'blob'
            xhr.onload = function(e){
                urlCreator = window.URL || window.webkitURL;
                urlCreator.revokeObjectURL(document.getElementById('%(id)s').src);
                imageUrl = urlCreator.createObjectURL(this.response);
                document.getElementById('%(id)s').src = imageUrl;
            }
            xhr.send();
            """ % {'id': id(self), 'frame_index':self.frame_index})

    def get_image_data(self, index=0):
        try: