'

', ); $form['submit'] = array( '#type' => 'submit', '#value' => t('Submit'), '#ajax' => array( // Here we set up our AJAX callback handler. 'callback' => 'ajax_example_progressbar_callback', // Tell FormAPI about our progress bar. 'progress' => array( 'type' => 'bar', 'message' => t('Execute..'), // Have the progress bar access this URL path. 'url' => url('examples/ajax_example/progressbar/progress/' . $form_state['time']), // The time interval for the progress bar to check for updates. 'interval' => 1000, ), ), ); return $form; } /** * Get the progress bar execution status, as JSON. * * This is the menu handler for * examples/ajax_example/progressbar/progress/$time. * * This function is our wholly arbitrary job that we're checking the status for. * In this case, we're reading a system variable that is being updated by * ajax_example_progressbar_callback(). * * We set up the AJAX progress bar to check the status every second, so this * will execute about once every second. * * The progress bar JavaScript accepts two values: message and percentage. We * set those in an array and in the end convert it JSON for sending back to the * client-side JavaScript. * * @param int $time * Timestamp. * * @see ajax_example_progressbar_callback() */ function ajax_example_progressbar_progress($time) { $progress = array( 'message' => t('Starting execute...'), 'percentage' => -1, ); $completed_percentage = variable_get('example_progressbar_' . $time, 0); if ($completed_percentage) { $progress['message'] = t('Executing...'); $progress['percentage'] = $completed_percentage; } drupal_json_output($progress); } /** * Our submit handler. * * This handler spends some time changing a variable and sleeping, and then * finally returns a form element which marks the #progress-status DIV as * completed. * * While this is occurring, ajax_example_progressbar_progress() will be called * a number of times by the client-sid JavaScript, which will poll the variable * being set here. * * @see ajax_example_progressbar_progress() */ function ajax_example_progressbar_callback($form, &$form_state) { $variable_name = 'example_progressbar_' . $form_state['time']; $commands = array(); variable_set($variable_name, 10); sleep(2); variable_set($variable_name, 40); sleep(2); variable_set($variable_name, 70); sleep(2); variable_set($variable_name, 90); sleep(2); variable_del($variable_name); $commands[] = ajax_command_html('#progress-status', t('Executed.')); return array( '#type' => 'ajax', '#commands' => $commands, ); }