Tooltron

/*

SelectFilter2 - Turns a multiple-select box into a filter interface.

Requires core.js, SelectBox.js and addevent.js.

*/

(function($) {

function findForm(node) {

    // returns the node of the form containing the given node

    if (node.tagName.toLowerCase() != 'form') {

        return findForm(node.parentNode);

    }

    return node;

}

window.SelectFilter = {

    init: function(field_id, field_name, is_stacked, admin_media_prefix) {

        if (field_id.match(/__prefix__/)){

            // Don't intialize on empty forms.

            return;

        }

        var from_box = document.getElementById(field_id);

        from_box.id += '_from'; // change its ID

        from_box.className = 'filtered';

        var ps = from_box.parentNode.getElementsByTagName('p');

        for (var i=0; i<ps.length; i++) {

            if (ps[i].className.indexOf("info") != -1) {

                // Remove <p class="info">, because it just gets in the way.

                from_box.parentNode.removeChild(ps[i]);

            } else if (ps[i].className.indexOf("help") != -1) {

                // Move help text up to the top so it isn't below the select

                // boxes or wrapped off on the side to the right of the add

                // button:

                from_box.parentNode.insertBefore(ps[i], from_box.parentNode.firstChild);

            }

        }

        // <div class="selector"> or <div class="selector stacked">

        var selector_div = quickElement('div', from_box.parentNode);

        selector_div.className = is_stacked ? 'selector stacked' : 'selector';

        // <div class="selector-available">

        var selector_available = quickElement('div', selector_div, '');

        selector_available.className = 'selector-available';

        var title_available = quickElement('h2', selector_available, interpolate(gettext('Available %s') + ' ', [field_name]));

        quickElement('img', title_available, '', 'src', admin_media_prefix + 'img/icon-unknown.gif', 'width', '10', 'height', '10', 'class', 'help help-tooltip', 'title', interpolate(gettext('This is the list of available %s. You may choose some by selecting them in the box below and then clicking the "Choose" arrow between the two boxes.'), [field_name]));

        var filter_p = quickElement('p', selector_available, '', 'id', field_id + '_filter');

        filter_p.className = 'selector-filter';

        var search_filter_label = quickElement('label', filter_p, '', 'for', field_id + "_input");

        var search_selector_img = quickElement('img', search_filter_label, '', 'src', admin_media_prefix + 'img/selector-search.gif', 'class', 'help-tooltip', 'alt', '', 'title', interpolate(gettext("Type into this box to filter down the list of available %s."), [field_name]));

        filter_p.appendChild(document.createTextNode(' '));

        var filter_input = quickElement('input', filter_p, '', 'type', 'text', 'placeholder', gettext("Filter"));

        filter_input.id = field_id + '_input';

        selector_available.appendChild(from_box);

        var choose_all = quickElement('a', selector_available, gettext('Choose all'), 'title', interpolate(gettext('Click to choose all %s at once.'), [field_name]), 'href', 'javascript: (function(){ SelectBox.move_all("' + field_id + '_from", "' + field_id + '_to"); SelectFilter.refresh_icons("' + field_id + '");})()', 'id', field_id + '_add_all_link');

        choose_all.className = 'selector-chooseall';

        // <ul class="selector-chooser">

        var selector_chooser = quickElement('ul', selector_div, '');

        selector_chooser.className = 'selector-chooser';

        var add_link = quickElement('a', quickElement('li', selector_chooser, ''), gettext('Choose'), 'title', gettext('Choose'), 'href', 'javascript: (function(){ SelectBox.move("' + field_id + '_from","' + field_id + '_to"); SelectFilter.refresh_icons("' + field_id + '");})()', 'id', field_id + '_add_link');

        add_link.className = 'selector-add';

        var remove_link = quickElement('a', quickElement('li', selector_chooser, ''), gettext('Remove'), 'title', gettext('Remove'), 'href', 'javascript: (function(){ SelectBox.move("' + field_id + '_to","' + field_id + '_from"); SelectFilter.refresh_icons("' + field_id + '");})()', 'id', field_id + '_remove_link');

        remove_link.className = 'selector-remove';

        // <div class="selector-chosen">

        var selector_chosen = quickElement('div', selector_div, '');

        selector_chosen.className = 'selector-chosen';

        var title_chosen = quickElement('h2', selector_chosen, interpolate(gettext('Chosen %s') + ' ', [field_name]));

        quickElement('img', title_chosen, '', 'src', admin_media_prefix + 'img/icon-unknown.gif', 'width', '10', 'height', '10', 'class', 'help help-tooltip', 'title', interpolate(gettext('This is the list of chosen %s. You may remove some by selecting them in the box below and then clicking the "Remove" arrow between the two boxes.'), [field_name]));

        var to_box = quickElement('select', selector_chosen, '', 'id', field_id + '_to', 'multiple', 'multiple', 'size', from_box.size, 'name', from_box.getAttribute('name'));

        to_box.className = 'filtered';

        var clear_all = quickElement('a', selector_chosen, gettext('Remove all'), 'title', interpolate(gettext('Click to remove all chosen %s at once.'), [field_name]), 'href', 'javascript: (function() { SelectBox.move_all("' + field_id + '_to", "' + field_id + '_from"); SelectFilter.refresh_icons("' + field_id + '");})()', 'id', field_id + '_remove_all_link');

        clear_all.className = 'selector-clearall';

        from_box.setAttribute('name', from_box.getAttribute('name') + '_old');

        // Set up the JavaScript event handlers for the select box filter interface

        addEvent(filter_input, 'keyup', function(e) { SelectFilter.filter_key_up(e, field_id); });

        addEvent(filter_input, 'keydown', function(e) { SelectFilter.filter_key_down(e, field_id); });

        addEvent(from_box, 'change', function(e) { SelectFilter.refresh_icons(field_id) });

        addEvent(to_box, 'change', function(e) { SelectFilter.refresh_icons(field_id) });

        addEvent(from_box, 'dblclick', function() { SelectBox.move(field_id + '_from', field_id + '_to'); SelectFilter.refresh_icons(field_id); });

        addEvent(to_box, 'dblclick', function() { SelectBox.move(field_id + '_to', field_id + '_from'); SelectFilter.refresh_icons(field_id); });

        addEvent(findForm(from_box), 'submit', function() { SelectBox.select_all(field_id + '_to'); });

        SelectBox.init(field_id + '_from');

        SelectBox.init(field_id + '_to');

        // Move selected from_box options to to_box

        SelectBox.move(field_id + '_from', field_id + '_to');

        if (!is_stacked) {

            // In horizontal mode, give the same height to the two boxes.

            var j_from_box = $(from_box);

            var j_to_box = $(to_box);

            var resize_filters = function() { j_to_box.height($(filter_p).outerHeight() + j_from_box.outerHeight()); }

            if (j_from_box.outerHeight() > 0) {

                resize_filters(); // This fieldset is already open. Resize now.

            } else {

                // This fieldset is probably collapsed. Wait for its 'show' event.

                j_to_box.closest('fieldset').one('show.fieldset', resize_filters);

            }

        }

        // Initial icon refresh

        SelectFilter.refresh_icons(field_id);

    },

    refresh_icons: function(field_id) {

        var from = $('#' + field_id + '_from');

        var to = $('#' + field_id + '_to');

        var is_from_selected = from.find('option:selected').length > 0;

        var is_to_selected = to.find('option:selected').length > 0;

        // Active if at least one item is selected

        $('#' + field_id + '_add_link').toggleClass('active', is_from_selected);

        $('#' + field_id + '_remove_link').toggleClass('active', is_to_selected);

        // Active if the corresponding box isn't empty

        $('#' + field_id + '_add_all_link').toggleClass('active', from.find('option').length > 0);

        $('#' + field_id + '_remove_all_link').toggleClass('active', to.find('option').length > 0);

    },

    filter_key_up: function(event, field_id) {

        var from = document.getElementById(field_id + '_from');

        // don't submit form if user pressed Enter

        if ((event.which && event.which == 13) || (event.keyCode && event.keyCode == 13)) {

            from.selectedIndex = 0;

            SelectBox.move(field_id + '_from', field_id + '_to');

            from.selectedIndex = 0;

            return false;

        }

        var temp = from.selectedIndex;

        SelectBox.filter(field_id + '_from', document.getElementById(field_id + '_input').value);

        from.selectedIndex = temp;

        return true;

    },

    filter_key_down: function(event, field_id) {

        var from = document.getElementById(field_id + '_from');

        // right arrow -- move across

        if ((event.which && event.which == 39) || (event.keyCode && event.keyCode == 39)) {

            var old_index = from.selectedIndex;

            SelectBox.move(field_id + '_from', field_id + '_to');

            from.selectedIndex = (old_index == from.length) ? from.length - 1 : old_index;

            return false;

        }

        // down arrow -- wrap around

        if ((event.which && event.which == 40) || (event.keyCode && event.keyCode == 40)) {

            from.selectedIndex = (from.length == from.selectedIndex + 1) ? 0 : from.selectedIndex + 1;

        }

        // up arrow -- wrap around

        if ((event.which && event.which == 38) || (event.keyCode && event.keyCode == 38)) {

            from.selectedIndex = (from.selectedIndex == 0) ? from.length - 1 : from.selectedIndex - 1;

        }

        return true;

    }

}

})(django.jQuery);