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bootstrap-selectsplitter.js
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bootstrap-selectsplitter.js
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+function ($) {
'use strict';
// Minified with jscompress.com
// CLASS DEFINITION
// ===============================
// NB: only user input triggers event change on SELECT.
var SelectSplitter = function(element, options) {
this.init('selectsplitter', element, options);
};
SelectSplitter.DEFAULTS = {
template:
'<div class="row" data-selectsplitter-wrapper-selector>' +
'<div class="col-xs-12 col-sm-6">' +
'<select class="form-control" data-selectsplitter-firstselect-selector></select>' +
'</div>' +
' <!-- Add the extra clearfix for only the required viewport -->' +
'<div class="clearfix visible-xs-block"></div>' +
'<div class="col-xs-12 col-sm-6">' +
'<select class="form-control" data-selectsplitter-secondselect-selector></select>' +
'</div>' +
'</div>'
};
SelectSplitter.prototype.init = function (type, element, options) {
// Initial variables.
var self = this;
self.type = type;
self.$element = $(element);
self.$element.hide();
self.options = $.extend( {}, SelectSplitter.DEFAULTS, options);
// Get categoryParent data from $element's OPTGROUP.
self.fullCategoryList = {};
var optgroupCount = 0;
var longestOptionCount = 0;
self.$element.find('optgroup').each(function() {
self.fullCategoryList[$(this).attr('label')] = {};
var $that = $(this);
var currentOptionCount = 0;
var temporaryFullCategoryList = {};
$(this).find('option').each(function() {
var x = $(this).attr('value');
var y = $(this).text();
temporaryFullCategoryList[$(this).index()] = {
'x': x,
'y': y
};
currentOptionCount++;
});
if (currentOptionCount > longestOptionCount) { longestOptionCount = currentOptionCount ;}
self.fullCategoryList[$that.attr('label')] = temporaryFullCategoryList;
optgroupCount++;
});
// Get OPTIONS for $firstSelect.
var optionsHtml = '';
for (var key in self.fullCategoryList) {
if (self.fullCategoryList.hasOwnProperty(key)) {
optionsHtml = optionsHtml + '<option>' + key + '</option>';
}
}
// Add template.
self.$element.after(self.options.template);
// Define selected elements.
self.$wrapper = self.$element.next('div[data-selectsplitter-wrapper-selector]'); // improved by keenthemes
self.$firstSelect = $('select[data-selectsplitter-firstselect-selector]', self.$wrapper); // improved by keenthemes
self.$secondSelect = $('select[data-selectsplitter-secondselect-selector]', self.$wrapper); // improved by keenthemes
// Define $firstSelect and $secondSelect size attribute
var selectSize = Math.max(optgroupCount, longestOptionCount, 2);
selectSize = Math.min(selectSize, 10);
self.$firstSelect.attr('size', selectSize);
self.$secondSelect.attr('size', selectSize);
// Fill $firstSelect with OPTIONS
self.$firstSelect.append(optionsHtml);
// Define events.
self.$firstSelect.on('change', $.proxy(self.updateParentCategory, self));
self.$secondSelect.on('change', $.proxy(self.updateChildCategory, self));
// Define main variables.
self.$selectedOption = '';
self.currentParentCategory = '';
self.currentChildCategory = '';
// Takes in consideration whether an option is already selected before initialization.
// Note: .val() always returns the last value if SELECT is new. Hence cannot use .val() at init.
// Note2: find(option:selected) retourne toujours une OPTION même lors du premier affichage.
if ( self.$element.find('option[selected=selected]').length) {
self.$selectedOption = self.$element.find('option[selected=selected]');
self.currentParentCategory = self.$selectedOption.closest('optgroup').attr('label');
self.currentChildCategory = self.$selectedOption.attr('value');
self.$firstSelect.val(self.currentParentCategory);
self.$firstSelect.trigger('change');
}
};
SelectSplitter.prototype.updateParentCategory = function () {
var self = this;
// Update main variables.
self.currentParentCategory = self.$firstSelect.val();
self.$secondSelect.empty();
var optionsHtml = '';
for (var key in self.fullCategoryList[self.currentParentCategory]) {
if (self.fullCategoryList[self.currentParentCategory].hasOwnProperty(key)) {
optionsHtml = optionsHtml + '<option value="' + self.fullCategoryList[self.currentParentCategory][key]['x'] + '">' +
self.fullCategoryList[self.currentParentCategory][key]['y'] +
'</option>';
}
}
self.$secondSelect.append(optionsHtml);
if ( self.$selectedOption ) {
self.$secondSelect.find( 'option[value="' + self.$selectedOption.attr('value') + '"]' ).attr('selected', 'selected');
}
};
SelectSplitter.prototype.updateChildCategory = function (event) {
var self = this;
// Update main variables.
self.currentChildCategory = $(event.target).val(); // Note: event.target returns the SELECT, hence we must use val().
// Remove selected items in $element SELECT, if any.
self.$element.find('option[selected=selected]').removeAttr('selected');
// Add selected attribute to the new selected OPTION.
self.$element[0].value = self.currentChildCategory; // Note: Below line of code alone was not working when going back to a previously selected option
self.$element.find('option[value="' + self.currentChildCategory + '"]').attr('selected', 'selected'); // Note: Adding attr also updates val().
self.$element.trigger('change'); // Required for external plugins.
self.$selectedOption = self.$element.find('option[selected=selected]');
};
SelectSplitter.prototype.destroy = function () {
var self = this;
self.$wrapper.remove();
self.$element.removeData(self.type);
self.$element.show();
};
// PLUGIN DEFINITION
// =========================
function Plugin(option) {
return this.each(function() {
var $this = $(this);
var data = $this.data('selectsplitter');
var options = typeof option === 'object' && option;
if (!data && option === 'destroy') { return; }
if (!data) { $this.data('selectsplitter', ( data = new SelectSplitter(this, options) ) ); }
if (typeof option == 'string') { data[option](); }
});
}
$.fn.selectsplitter = Plugin;
/* http://stackoverflow.com/questions/10525600/what-is-the-purpose-of-fn-foo-constructor-foo-in-twitter-bootstrap-js */
$.fn.selectsplitter.Constructor = SelectSplitter;
}(jQuery);