bachy
287
term_reference_tree.js
Normal file
287
term_reference_tree.js
Normal file
@@ -0,0 +1,287 @@
|
||||
(function($) {
|
||||
Drupal.behaviors.termReferenceTree = {
|
||||
attach: function(context, settings) {
|
||||
// Bind the term expand/contract button to slide toggle the list underneath.
|
||||
$('.term-reference-tree-button', context).click(function() {
|
||||
$(this).toggleClass('term-reference-tree-collapsed');
|
||||
$(this).siblings('ul').slideToggle('fast');
|
||||
});
|
||||
|
||||
// An expand all button (unimplemented)
|
||||
/*
|
||||
$('.expandbutton').click(function() {
|
||||
$(this).siblings('.term-reference-tree-button').trigger('click');
|
||||
});
|
||||
*/
|
||||
|
||||
|
||||
$('.term-reference-tree', context).each(function() {
|
||||
// On page load, check whether the maximum number of choices is already selected.
|
||||
// If so, disable the other options.
|
||||
var tree = $(this);
|
||||
checkMaxChoices(tree, false);
|
||||
$(this).find('input[type=checkbox]').change(function() {
|
||||
checkMaxChoices(tree, $(this));
|
||||
});
|
||||
|
||||
//On page load, check if the user wants a track list. If so, add the
|
||||
//currently selected items to it.
|
||||
if($(this).hasClass('term-reference-tree-track-list-shown')) {
|
||||
var track_list_container = $(this).find('.term-reference-tree-track-list');
|
||||
|
||||
//Var to track whether using checkboxes or radio buttons.
|
||||
var input_type =
|
||||
( $(this).has('input[type=checkbox]').size() > 0 ) ? 'checkbox' : 'radio';
|
||||
|
||||
//Find all the checked controls.
|
||||
var checked_controls = $(this).find('input[type=' + input_type + ']:checked');
|
||||
|
||||
//Get their labels.
|
||||
var labels = checked_controls.next();
|
||||
var label_element;
|
||||
|
||||
//For each label of the checked boxes, add item to the track list.
|
||||
labels.each(function(index) {
|
||||
label_element = $(labels[index]);
|
||||
addItemToTrackList(
|
||||
track_list_container, //Where to add new item.
|
||||
label_element.html(), //Text of new item.
|
||||
$(label_element).attr('for'), //Id of control new item is for.
|
||||
input_type //checkbox or radio
|
||||
);
|
||||
}); //End labels.each
|
||||
|
||||
//Show "nothing selected" message, if needed.
|
||||
showNothingSelectedMessage(track_list_container);
|
||||
|
||||
//Event - when an element on the track list is clicked on:
|
||||
// 1. Delete it.
|
||||
// 2. Uncheck the associated checkbox.
|
||||
//The event is bound to the track list container, not each element.
|
||||
$(track_list_container).click(function(event){
|
||||
//Remove the "nothing selected" message if showing - add it later if needed.
|
||||
//removeNothingSelectedMessage(track_list_container);
|
||||
var event_target = $(event.target);
|
||||
var control_id = event_target.data('control_id');
|
||||
|
||||
if(control_id) {
|
||||
event_target.remove();
|
||||
|
||||
var checkbox = $('#' + control_id);
|
||||
checkbox.removeAttr('checked');
|
||||
checkMaxChoices(tree, checkbox);
|
||||
|
||||
//Show "nothing selected" message, if needed.
|
||||
showNothingSelectedMessage(track_list_container);
|
||||
}
|
||||
});
|
||||
|
||||
//Change track list when controls are clicked.
|
||||
$(this).find('.form-' + input_type).change(function(event){
|
||||
//Remove the "nothing selected" message if showing - add it later if needed.
|
||||
removeNothingSelectedMessage(track_list_container);
|
||||
var event_target = $(event.target);
|
||||
var control_id = event_target.attr('id');
|
||||
if ( event_target.attr('checked') ) {
|
||||
//Control checked - add item to the track list.
|
||||
label_element = event_target.next();
|
||||
addItemToTrackList(
|
||||
track_list_container, //Where to add new item.
|
||||
label_element.html(), //Text of new item.
|
||||
$(label_element).attr('for'), //Id of control new item is for.
|
||||
input_type //checkbox or radio
|
||||
);
|
||||
}
|
||||
else {
|
||||
//Checkbox unchecked. Remove from the track list.
|
||||
$('#' + control_id + '_list').remove();
|
||||
}
|
||||
|
||||
//Show "nothing selected" message, if needed.
|
||||
showNothingSelectedMessage(track_list_container);
|
||||
}); //End process checkbox changes.
|
||||
} //End Want a track list.
|
||||
|
||||
//On page load, check if the user wants a cascading selection.
|
||||
if($(this).hasClass('term-reference-tree-cascading-selection')) {
|
||||
|
||||
//Check children when checkboxes are clicked.
|
||||
$(this).find('.form-checkbox').change(function(event) {
|
||||
var event_target = $(event.target);
|
||||
var control_id = event_target.attr('id');
|
||||
var children = event_target.parent().next().children().children('div.form-type-checkbox').children('input[id^="' + control_id + '-children"]');
|
||||
if(event_target.attr('checked')) {
|
||||
//Checkbox checked - check children if none were checked.
|
||||
if(!$(children).filter(':checked').length) {
|
||||
$(children).click().trigger('change');
|
||||
}
|
||||
}
|
||||
else {
|
||||
//Checkbox unchecked. Uncheck children if all were checked.
|
||||
if(!$(children).not(':checked').length) {
|
||||
$(children).click().trigger('change');
|
||||
}
|
||||
}
|
||||
|
||||
});
|
||||
//End process checkbox changes.
|
||||
} //End Want a cascading checking.
|
||||
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Add a new item to the track list.
|
||||
* If more than one item can be selected, the new item is positioned to
|
||||
* match the order of the terms in the checkbox tree.
|
||||
*
|
||||
* @param track_list_container Container where the new item will be added.
|
||||
*
|
||||
* @param item_text Text of the item to add.
|
||||
*
|
||||
* @param control_id Id of the checkbox/radio control the item matches.
|
||||
*
|
||||
* @param control_type Control type - 'checkbox' or 'radio'.
|
||||
*/
|
||||
function addItemToTrackList(track_list_container, item_text, control_id, control_type) {
|
||||
var new_item = $('<li class="track-item">' + item_text + '</li>');
|
||||
new_item.data('control_id', control_id);
|
||||
|
||||
//Add an id for easy finding of the item.
|
||||
new_item.attr('id', control_id + '_list');
|
||||
|
||||
//Process radio controls - only one item can be selected.
|
||||
if ( control_type == 'radio') {
|
||||
//Find the existing element on the track list, if there is one.
|
||||
var current_items = track_list_container.find('li');
|
||||
|
||||
//If there are no items on the track list, add the new item.
|
||||
if ( current_items.size() == 0 ) {
|
||||
track_list_container.append(new_item);
|
||||
}
|
||||
else {
|
||||
//There is an item on the list.
|
||||
var current_item = $(current_items.get(0));
|
||||
|
||||
//Is the item we want to add different from what is there?
|
||||
if ( current_item.data('control_id') != control_id ) {
|
||||
//Remove exiting element from track list, and add the new one.
|
||||
current_item.remove();
|
||||
track_list_container.append(new_item);
|
||||
}
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
//Using checkboxes, so there can be more than one selected item.
|
||||
//Find the right place to put the new item, to match the order of the
|
||||
//checkboxes.
|
||||
var list_items = track_list_container.find('li');
|
||||
var item_comparing_to;
|
||||
|
||||
//Flag to tell whether the item was inserted.
|
||||
var inserted_flag = false;
|
||||
list_items.each(function(index){
|
||||
item_comparing_to = $(list_items[index]);
|
||||
|
||||
//If item is already on the track list, do nothing.
|
||||
if ( control_id == item_comparing_to.data('control_id') ) {
|
||||
inserted_flag = true;
|
||||
return false; //Returning false stops the loop.
|
||||
}
|
||||
else if ( control_id < item_comparing_to.data('control_id') ) {
|
||||
//Add it here.
|
||||
item_comparing_to.before(new_item);
|
||||
inserted_flag = true;
|
||||
return false; //Returning false stops the loop.
|
||||
}
|
||||
});
|
||||
|
||||
//If not inserted yet, add new item at the end of the track list.
|
||||
if ( ! inserted_flag ) {
|
||||
track_list_container.append(new_item);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Show the 'nothing selected' message if it applies.
|
||||
*
|
||||
* @param track_list_container Where the message is to be shown.
|
||||
*/
|
||||
function showNothingSelectedMessage(track_list_container) {
|
||||
//Is the message there already?
|
||||
var message_showing =
|
||||
(track_list_container.find('.term_ref_tree_nothing_message').size() != 0);
|
||||
|
||||
//Number of real items showing.
|
||||
var num_real_items_showing =
|
||||
message_showing
|
||||
? track_list_container.find('li').size() - 1
|
||||
: track_list_container.find('li').size();
|
||||
if ( num_real_items_showing == 0 ) {
|
||||
//No items showing, so show the message.
|
||||
if ( ! message_showing ) {
|
||||
track_list_container.append(
|
||||
'<li class="term_ref_tree_nothing_message">' + termReferenceTreeNothingSelectedText + '</li>'
|
||||
);
|
||||
}
|
||||
}
|
||||
else { // !(num_real_items_showing == 0)
|
||||
//There are real items.
|
||||
if ( message_showing ) {
|
||||
track_list_container.find('.term_ref_tree_nothing_message').remove();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Remove the 'nothing selected' message. Makes processing easier.
|
||||
*
|
||||
* @param track_list_container Where the message is shown.
|
||||
*/
|
||||
function removeNothingSelectedMessage(track_list_container) {
|
||||
track_list_container.find('.term_ref_tree_nothing_message').remove();
|
||||
}
|
||||
|
||||
// This helper function checks if the maximum number of choices is already selected.
|
||||
// If so, it disables all the other options. If not, it enables them.
|
||||
function checkMaxChoices(item, checkbox) {
|
||||
var maxChoices = -1;
|
||||
try {
|
||||
maxChoices = parseInt(Drupal.settings.term_reference_tree.trees[item.attr('id')]['max_choices']);
|
||||
}
|
||||
catch (e){}
|
||||
var count = item.find(':checked').length;
|
||||
|
||||
if(maxChoices > 0 && count >= maxChoices) {
|
||||
item.find('input[type=checkbox]:not(:checked)').attr('disabled', 'disabled').parent().addClass('disabled');
|
||||
} else {
|
||||
item.find('input[type=checkbox]').removeAttr('disabled').parent().removeClass('disabled');
|
||||
}
|
||||
|
||||
if(checkbox) {
|
||||
if(item.hasClass('select-parents')) {
|
||||
var track_list_container = item.find('.term-reference-tree-track-list');
|
||||
var input_type =
|
||||
( item.has('input[type=checkbox]').size() > 0 ) ? 'checkbox' : 'radio';
|
||||
|
||||
if(checkbox.attr('checked')) {
|
||||
checkbox.parents('ul.term-reference-tree-level li').children('div.form-item').children('input[type=checkbox]').each(function() {
|
||||
$(this).attr('checked', checkbox.attr('checked'));
|
||||
|
||||
if(track_list_container) {
|
||||
label_element = $(this).next();
|
||||
addItemToTrackList(
|
||||
track_list_container, //Where to add new item.
|
||||
label_element.html(), //Text of new item.
|
||||
$(label_element).attr('for'), //Id of control new item is for.
|
||||
input_type //checkbox or radio
|
||||
);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
})(jQuery);
|
||||
Reference in New Issue
Block a user