I just did a quick search through all the code to find the filter hooks. This is what I found (showing line numbers and a bit of context around each hook). Most of them it seems to be pretty self-evident what the hook does.
lib\Wpsqt\Admin.php
161 apply_filters('wpsqt_admin_init',$this)
264 echo apply_filters('wpsqt-export-csv', implode("\r\n", $lines), $_GET['id']); // after sending page headers
lib\Wpsqt\Core.php
00086: public function init(){
00087:
00088: apply_filters("wpsqt_init",$this);
00353: $possibleLocations = array();
00354: $possibleLocations[] = WPSQT_DIR.'lib/';
00355: $possibleLocations = apply_filters('wpsqt_plugin_locations',$possibleLocations);
lib\Wpsqt\Shortcode.php
00091: $this->_acceptableTypes = apply_filters("wpsqt_shortcode_types",$this->_acceptableTypes);
00092: $this->_acceptableTypes = array_map("strtolower",$this->_acceptableTypes);
00183: $message = apply_filters("wpsqt_".$this->_type."_error",$message, $this->_errors);
00256: $fields = apply_filters("wpsqt_".$this->_type."_form_fields",$fields);
lib\Wpsqt\System.php
00160: $details['type'] = $type;
00161: if ( !is_bool($type) ){
00162: $details = apply_filters( 'wpsqt_fetch_'.$type.'_details' , $details );
00163: }
00274: if ( empty($sections) ){
00275: $sections = array(array('id' => false,'difficulty' => false,'order' => false,'name' => false,'limit' => false));
00276: }
00277:
00278: $sections = apply_filters("wpsqt_fetch_sections",$sections);
00359: $validators = array("None","Text","Number","Email");
00360:
00361: $validators = apply_filters("wpsqt_validators",$validators);
00383: public static function serializeQuestion( $question , $type ){
00384:
00385: $question = apply_filters("wpsqt_pre_save_".$type."_question",$question);
00420: return apply_filters("wpsqt_fetch_save_".$type."_question",$question);
00432: $questions = array('Multiple' => 'Multiple choice question with mulitple correct answers.',
00433: 'Single' => 'Multiple choice question with a signle correct answer.',
00434: 'Free Text' => 'Question where the user types in the answer into a textarea.' );
00435:
00436: return apply_filters('wpsqt_quiz_question_types', $questions );
00440: * Returns the questions types that are related to
00441: * surveys. Runs the filter wpsqt_survey_question_types.
00449: 'Dropdown' => 'Multiple choice question with single correct answers.',
00450: 'Likert' => '',
00451: 'Likert Matrix' => 'Displays a matrix of likert scales from 1 to 5',
00452: 'Free Text' => '');
00453:
00454: return apply_filters('wpsqt_survey_question_types', $questions );
00458: public static function getPollQuestionTypes(){
00459:
00460: $questions = array('Single' => 'Multiple choice question with a single correct answer.','Multiple' => 'Multiple choice question with mulitple correct answers.');
00461:
00462: return apply_filters('wpsqt_survey_question_types', $questions );
lib\Wpsqt\Tokens.php
00052: ->addToken("TB_B", "Toggle block of information after this tag")
00053: ->addToken("TB_E", "End of block of information to be toggled");
00054:
00055: }
00056:
00057: return apply_filters( "wpsqt_replacement_tokens" , self::$instance );
00058: }
00157: $this->setTokenValue('TB_B' , '<div class="wpsqt-toggle"><div class="wpsqt-show-toggle"> <a href="#">[ '.__('More', 'wp-survey-and-quiz-tool').' >> ]</a></div><div class="wpsqt-toggle-block" style="display:none;">');
00158: $this->setTokenValue('TB_E' , '</div><div class="wpsqt-hide-toggle" style="display:none;"><a href="#">[ << '.__('Less', 'wp-survey-and-quiz-tool').']</a></div></div>' );
00159:
00160: apply_filters("wpsqt_set_token_values", $this);
lib\Wpsqt\Upgrade.php
00181: if ( version_compare($version, '2.0.0.3') < 0 ){
00182: $objUpgrade->addQuery("ALTER TABLE <code>".WPSQT_TABLE_RESULTS."</code> ADD <code>score</code> INT NULL , ADD <code>total</code> INT NULL , ADD <code>percentage</code> INT NULL","Added scores columns to results");
00183: }
00184: apply_filters( 'wpsqt_upgrade_object', $objUpgrade, $version );
lib\Wpsqt\Form\Export.php
00024: $this->addOption("wpsqt_type", "Type", "select", $options['type'], "The format the data is to be outputted in.",array("SQL","CSV") )
00025: ->addOption("wpsqt_data", "Data", "select", $options['data'], "The data that is to be exported", array( "Results","Quizzes and Surveys" ) );
00026:
00027: apply_filters("wpsqt_form_export",$this);
lib\Wpsqt\Form\Import.php
00021: $this->addOption("wpsqt_type", "Type", "select", $options['type'], "The format the data is to be outputted in.",array("SQL") )
00022: ->addOption("wpsqt_content", "Content", "textarea", $options['content'], "The data that is to be imported" );
00023:
00024: apply_filters("wpsqt_form_export",$this);
lib\Wpsqt\Form\Poll.php
00043: $this->addOption("wpsqt_custom_directory", "Custom Directory Location", "static", WPSQT_DIR."/pages/custom/".$blog_id."/quiz-".$options['id'] ,false,array(),false);
00044: }
00045:
00046: $this->options = $options;
00047:
00048: apply_filters("wpsqt_form_poll",$this);
lib\Wpsqt\Form\Question.php
00057: ->addOption("wpsqt_explanation_onlyatfinish", "Answer Explanation only at finish", "yesno", $options['explanation_onlyatfinish'], "Only show the explanation of an answer after the quiz is taken and "Finish Display" is set to "Review" .", array(), false)
00058: ->addOption("wpsqt_add_text", "Additional Text", "textarea", $options['add_text'], "Additional text/html for questions, good for using html to display images.",array(),false)
00059: ->addOption("wpsqt_image", "Image", "image", $options['image'], "The image that is to be associated with the question.", array(), false );
00060:
00061: $this->options = $options;
00062: apply_filters("wpsqt_form_question", $this);
lib\Wpsqt\Form\Quiz.php
00072: if ( array_key_exists('id', $options) ){
00073: $this->addOption("wpsqt_custom_directory", "Custom Directory Location", "static", WPSQT_DIR."/pages/custom/".$blog_id."/quiz-".$options['id'] ,false,array(),false);
00074: }
00075:
00076: $this->options = $options;
00077: apply_filters("wpsqt_form_quiz",$this);
00078:
lib\Wpsqt\Form\Survey.php
00047: ->addOption("wpsqt_finish_message", "Finish Message", "textarea", $options['finish_message'], "The message to display when the user has successfully finished the quiz. <strong>If empty the default one will be displayed.</strong> <a href=\"#template_tokens\">Click Here</a> to see the tokens that can be used.", array(), false);
00048:
00049: $this->options = $options;
00050: apply_filters("wpsqt_form_survey",$this);
lib\Wpsqt\Page\Main\Questions.php
00064:
00065: $itemsPerPage = get_option('wpsqt_number_of_items');
00066: $questions = $wpdb->get_results(
00067: $wpdb->prepare("SELECT * FROM <code>".WPSQT_TABLE_QUESTIONS."</code> WHERE item_id = %d ORDER BY <code>order</code> ASC",array($_GET['id']) ),ARRAY_A
00068: );
00069: $questions = apply_filters("wpsqt_list_questions",$questions);
pages\admin\misc\form.php
00039: case 'image':
00040: if (isset($_GET['image']) && $_GET['image'] == 'remove') {
00041: $option['value'] = '';
00042: }
00043: $media_upload_iframe_src = "media-upload.php?question_id=".$name."&app=wpsqt&TB_iframe=true&cb=" . rand();
00044: $image_upload_iframe_src = apply_filters('image_upload_iframe_src', $media_upload_iframe_src."&type=image");
Hope that helps!
Noel
