320 lines
11 KiB
JavaScript
320 lines
11 KiB
JavaScript
/**
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* @param 'createCallback' A function to be called when a new entry is created. Two arguments are supplied to this function:
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* The select element used and the value of the option. If the function returns false addition will be cancelled. If it returns
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* anything else it will be used as the value of the newly added option.
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* @param 'createText' The placeholder text for the create action.
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* @param 'title' The title to show if no options are selected.
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* @param 'checked' An array containing values for options that should be checked. Any options which are already selected will be added to this array.
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* @param 'labels' The corresponding labels to show for the checked items.
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* @param 'oncheck' Callback function which will be called when a checkbox/radiobutton is selected. If the function returns false the input will be unchecked.
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* @param 'onuncheck' @see 'oncheck'.
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* @param 'singleSelect' If true radiobuttons will be used instead of checkboxes.
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*/
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(function( $ ){
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var multiSelectId=-1;
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$.fn.multiSelect=function(options) {
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multiSelectId++;
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var settings = {
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'createCallback':false,
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'createText':false,
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'singleSelect':false,
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'selectedFirst':false,
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'sort':true,
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'title':this.attr('title'),
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'checked':[],
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'labels':[],
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'oncheck':false,
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'onuncheck':false,
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'minWidth': 'default;'
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};
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$(this).attr('data-msid', multiSelectId);
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$.extend(settings,options);
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$.each(this.children(),function(i,option) {
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// If the option is selected, but not in the checked array, add it.
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if($(option).attr('selected') && settings.checked.indexOf($(option).val()) === -1) {
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settings.checked.push($(option).val());
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settings.labels.push($(option).text().trim());
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}
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// If the option is in the checked array but not selected, select it.
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else if(settings.checked.indexOf($(option).val()) !== -1 && !$(option).attr('selected')) {
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$(option).attr('selected', 'selected');
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settings.labels.push($(option).text().trim());
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}
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});
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var button=$('<div class="multiselect button"><span>'+settings.title+'</span><span>▾</span></div>');
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var span=$('<span/>');
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span.append(button);
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button.data('id',multiSelectId);
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button.selectedItems=[];
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this.hide();
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this.before(span);
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if(settings.minWidth=='default') {
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settings.minWidth=button.width();
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}
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button.css('min-width',settings.minWidth);
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settings.minOuterWidth=button.outerWidth()-2;
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button.data('settings',settings);
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if(!settings.singleSelect && settings.checked.length>0) {
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button.children('span').first().text(settings.labels.join(', '));
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} else if(settings.singleSelect) {
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button.children('span').first().text(this.find(':selected').text());
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}
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var self = this;
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self.menuDirection = 'down';
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button.click(function(event){
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var button=$(this);
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if(button.parent().children('ul').length>0) {
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if(self.menuDirection === 'down') {
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button.parent().children('ul').slideUp(400,function() {
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button.parent().children('ul').remove();
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button.removeClass('active down');
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});
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} else {
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button.parent().children('ul').fadeOut(400,function() {
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button.parent().children('ul').remove();
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button.removeClass('active up');
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});
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}
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return;
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}
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var lists=$('ul.multiselectoptions');
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lists.slideUp(400,function(){
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lists.remove();
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$('div.multiselect').removeClass('active');
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button.addClass('active');
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});
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button.addClass('active');
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event.stopPropagation();
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var options=$(this).parent().next().children();
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var list=$('<ul class="multiselectoptions"/>').hide().appendTo($(this).parent());
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var inputType = settings.singleSelect ? 'radio' : 'checkbox';
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function createItem(element, checked){
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element=$(element);
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var item=element.val();
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var id='ms'+multiSelectId+'-option-'+item;
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var input=$('<input type="' + inputType + '"/>');
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input.attr('id',id);
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if(settings.singleSelect) {
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input.attr('name', 'ms'+multiSelectId+'-option');
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}
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var label=$('<label/>');
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label.attr('for',id);
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label.text(element.text() || item);
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if(settings.checked.indexOf(item)!=-1 || checked) {
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input.attr('checked', true);
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}
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if(checked){
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if(settings.singleSelect) {
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settings.checked = [item];
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settings.labels = [item];
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} else {
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settings.checked.push(item);
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settings.labels.push(item);
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}
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}
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input.change(function(){
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var value = $(this).attr('id').substring(String('ms'+multiSelectId+'-option').length+1);
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var label = $(this).next().text().trim();
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if($(this).is(':checked')) {
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if(settings.singleSelect) {
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settings.checked = [];
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settings.labels = [];
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$.each(self.find('option'), function() {
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$(this).removeAttr('selected');
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});
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}
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element.attr('selected','selected');
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if(typeof settings.oncheck === 'function') {
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if(settings.oncheck(value)===false) {
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$(this).attr('checked', false);
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return;
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}
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}
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settings.checked.push(value);
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settings.labels.push(label);
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$(this).parent().addClass('checked');
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} else {
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var index=settings.checked.indexOf(value);
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element.attr('selected',null);
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if(typeof settings.onuncheck === 'function') {
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if(settings.onuncheck(value)===false) {
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$(this).attr('checked',true);
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return;
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}
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}
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$(this).parent().removeClass('checked');
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settings.checked.splice(index,1);
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settings.labels.splice(index,1);
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}
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var oldWidth=button.width();
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button.children('span').first().text(settings.labels.length > 0
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? settings.labels.join(', ')
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: settings.title);
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var newOuterWidth=Math.max((button.outerWidth()-2),settings.minOuterWidth)+'px';
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var newWidth=Math.max(button.width(),settings.minWidth);
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var pos=button.position();
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button.css('height',button.height());
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button.css('white-space','nowrap');
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button.css('width',oldWidth);
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button.animate({'width':newWidth},undefined,undefined,function(){
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button.css('width','');
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});
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list.animate({'width':newOuterWidth,'left':pos.left+3});
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});
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var li=$('<li></li>');
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li.append(input).append(label);
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if(input.is(':checked')) {
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li.addClass('checked');
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}
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return li;
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}
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$.each(options,function(index,item){
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list.append(createItem(item));
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});
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button.parent().data('preventHide',false);
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if(settings.createText){
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var li=$('<li class="creator">+ '+settings.createText+'</li>');
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li.click(function(event){
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li.empty();
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var input=$('<input type="text" class="new">');
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li.append(input);
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input.focus();
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input.css('width',button.innerWidth());
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button.parent().data('preventHide',true);
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input.keypress(function(event) {
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if(event.keyCode == 13) {
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event.preventDefault();
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event.stopPropagation();
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var value = $(this).val();
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var exists = false;
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$.each(options,function(index, item) {
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if ($(item).val() == value || $(item).text() == value) {
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exists = true;
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return false;
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}
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});
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if (exists) {
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return false;
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}
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var li=$(this).parent();
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var val = $(this).val();
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var select=button.parent().next();
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if(typeof settings.createCallback === 'function') {
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var response = settings.createCallback(select, val);
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if(response === false) {
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return false;
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} else if(typeof response !== 'undefined') {
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val = response;
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}
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}
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if(settings.singleSelect) {
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$.each(select.find('option:selected'), function() {
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$(this).removeAttr('selected');
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});
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}
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$(this).remove();
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li.text('+ '+settings.createText);
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li.before(createItem(this));
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var option=$('<option selected="selected"/>');
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option.text($(this).val()).val(val).attr('selected', 'selected');
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select.append(option);
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li.prev().children('input').prop('checked', true).trigger('change');
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button.parent().data('preventHide',false);
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button.children('span').first().text(settings.labels.length > 0
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? settings.labels.join(', ')
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: settings.title);
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if(self.menuDirection === 'up') {
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var list = li.parent();
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list.css('top', list.position().top-li.outerHeight());
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}
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}
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});
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input.blur(function() {
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event.preventDefault();
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event.stopPropagation();
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$(this).remove();
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li.text('+ '+settings.createText);
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setTimeout(function(){
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button.parent().data('preventHide',false);
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},100);
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});
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});
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list.append(li);
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}
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var doSort = function(list, selector) {
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var rows = list.find('li'+selector).get();
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if(settings.sort) {
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rows.sort(function(a, b) {
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return $(a).text().toUpperCase().localeCompare($(b).text().toUpperCase());
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});
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}
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$.each(rows, function(index, row) {
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list.append(row);
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});
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};
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if(settings.sort && settings.selectedFirst) {
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doSort(list, '.checked');
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doSort(list, ':not(.checked)');
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} else if(settings.sort && !settings.selectedFirst) {
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doSort(list, '');
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}
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list.append(list.find('li.creator'));
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var pos=button.position();
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if(($(document).height() > (button.offset().top+button.outerHeight() + list.children().length * button.height())
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&& $(document).height() - button.offset().top > (button.offset().top+button.outerHeight() + list.children().length * button.height()))
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|| $(document).height()/2 > button.offset().top
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) {
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list.css({
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top:pos.top+button.outerHeight()-5,
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left:pos.left+3,
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width:(button.outerWidth()-2)+'px',
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'max-height':($(document).height()-(button.offset().top+button.outerHeight()+10))+'px'
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});
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list.addClass('down');
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button.addClass('down');
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list.slideDown();
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} else {
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list.css('max-height', $(document).height()-($(document).height()-(pos.top)+50)+'px');
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list.css({
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top:pos.top - list.height(),
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left:pos.left+3,
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width:(button.outerWidth()-2)+'px'
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});
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list.detach().insertBefore($(this));
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list.addClass('up');
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button.addClass('up');
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list.fadeIn();
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self.menuDirection = 'up';
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}
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list.click(function(event) {
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event.stopPropagation();
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});
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});
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$(window).click(function() {
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if(!button.parent().data('preventHide')) {
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// How can I save the effect in a var?
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if(self.menuDirection === 'down') {
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button.parent().children('ul').slideUp(400,function() {
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button.parent().children('ul').remove();
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button.removeClass('active down');
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});
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} else {
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button.parent().children('ul').fadeOut(400,function() {
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button.parent().children('ul').remove();
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button.removeClass('active up');
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});
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}
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}
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});
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return span;
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};
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})( jQuery );
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