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jquery-multiSelect.js
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jquery-multiSelect.js
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(function($) {
$.widget("vdubus.multiSelect", {
options : {
/**
* Allow us to enable the update of the component on change in place of the validate button.
*/
enableChangeMode : false,
/**
* If enableChangeMode is true, then we must add an empty default option to allow the change event correctly.<br />
* This is the label of this empty option.
*/
emptyOptionLabel : null,
/**
* If enableChangeMode is false, then we must use a button to add items in the list.<br />
* This is the label of this button.
*/
addButtonLabel : "Add"
},
/**
* The container of this multiSelect.
*/
_container : null,
/**
* The container which will contain the spans.
*/
_spanContainer : null,
/**
* The current name of the select.
*/
_elementName : null,
/**
* The select to manipulate.
*/
_select : null,
/**
* Create the multiSelect component.
*/
_create : function() {
if (!this.element.length || this.element[0].tagName !== "SELECT" || !this.element.prop("multiple")) {
// We don't manage this element.
return;
}
this._elementName = this.element.prop("name");
this._select = $("<select />");
var selectContainer = $("<span />").addClass("vdubus-multiSelect-selectContainer").append(this._select);
this._spanContainer = $("<span />").addClass("vdubus-multiSelect-spanContainer");
this._container = $("<span />").addClass("vdubus-multiSelect").append(selectContainer).append(this._spanContainer);
this.element.addClass("vdubus-multiSelect-hidden").after(this._container);
this._on(this._container, {
"click span.ui-icon.ui-icon-trash" : this._deleteSelectedValue
});
if (this.options.enableChangeMode) {
// We must manage the empty option.
this._on(this._select, {
"change" : this._manageSelectedValue
});
} else {
// We must use the button mode.
var addButton = $("<button />").addClass("vdubus-multiSelect-addButton").text(this.options.addButtonLabel).insertAfter(this._select);
this._on(this._container, {
"click button.vdubus-multiSelect-addButton" : this._addButtonClick
});
}
// Initialize the content of the new select element.
this._initializeMultiSelect();
if (this.options.enableChangeMode) {
// For Chrome compatibility, once we have manage the current selected value, we must select the first one.
this._select.find("option:first").prop("selected", true);
}
},
/**
* Action to do on delete value action.
*
* @param {Event}
* event : event object.
*/
_deleteSelectedValue : function(event) {
event.preventDefault();
this._moveBackValue($(event.target).parent());
},
/**
* Move a selected value back to the select.
*
* @param {jQuery}
* spanValue : the value to move back.
*/
_moveBackValue : function(spanValue) {
var value = spanValue.data("value");
var optToInsert = $("<option />").attr("value", value).text(spanValue.find("span.vdubus-multiSelect-value-text").text()).data("index", spanValue.data("index"));
this._insertElementInOrder(optToInsert, this._select, "option");
this.element.find("option[value='" + value + "']").prop("selected", false).trigger("change");
// We must remove the element after we getting the data on it because the remove function delete them.
spanValue.remove();
},
/**
* Action executed on the click of the add button.
*
* @param {Event}
* event : the event object.
*/
_addButtonClick : function(event) {
event.preventDefault();
this._manageSelectedValue();
},
/**
* Manage the current selected values to display them under the select.
*/
_manageSelectedValue : function() {
var selectedOptions = this._select.find("option").filter(":selected:not([value=''])");
var index = 0;
for (; index < selectedOptions.length; index++) {
var option = $(selectedOptions[index]);
var indexOpt = option.data("index");
var button = $("<span />").addClass("vdubus-multiSelect-value-delete ui-icon ui-icon-trash");
var span = $("<span />").addClass("vdubus-multiSelect-value-text").text(option.text());
var spanToInsert = $("<span />").addClass("vdubus-multiSelect-value").append(span).append(button).data("index", indexOpt).data("value", option.prop("value"));
this._insertElementInOrder(spanToInsert, this._spanContainer, "span.vdubus-multiSelect-value");
this.element.find("option[value='" + option.prop("value") + "']").prop("selected", true);
}
// We must remove the element after we getting the data on it because the remove function delete them.
selectedOptions.remove();
if (index) {
this.element.trigger("change");
}
},
/**
* Insert an element in the order specified by data("index") into another element.
*
* @param {jQuery}
* elementToInsert : the element to insert.
* @param {jQuery}
* elementForInsert : the element for the insert.
* @param {String}
* selector : the selector to find elements for insertion.
*/
_insertElementInOrder : function(elementToInsert, elementForInsert, selector) {
var elements = elementForInsert.find(selector);
var indexToInsert = elementToInsert.data("index") * 1;
// We must find the position in which we must insert our element.
var index = 0;
var element = null;
var inserted = false;
for (; index < elements.length && !inserted; index++) {
element = $(elements[index]);
var elementIndex = element.data("index") * 1;
if (elementIndex > indexToInsert) {
element.before(elementToInsert);
inserted = true;
}
}
// Our element wasn't inserted, so it must be the first or the last.
if (!inserted) {
if (element) {
// Our element was the first.
element.after(elementToInsert);
} else {
// Our element was the last.
elementToInsert.appendTo(elementForInsert);
}
}
},
_initializeMultiSelect : function() {
// Add the multiple attribute to allow us to update the content of the new select element.
this._select.attr("multiple", "multiple");
if (this.options.enableChangeMode) {
// We must manage the empty option.
var emptyOption = $("<option />").addClass("vdubus-multiSelect-emptyOption").attr("value", "").data("index", -1);
if (this.options.emptyOptionLabel) {
// If a label is available, then we use it.
emptyOption.text(this.options.emptyOptionLabel);
}
emptyOption.prependTo(this._select);
}
// Add all options in our select.
this.element.find("option").clone().appendTo(this._select);
this._select.val(this.element.val());
// Each option should have an index in function of their position in the select.
var index = 0;
var options = this._select.find("option");
for (; index < options.length; index++) {
var tmpOpt = $(options[index]);
tmpOpt.data("index", index);
}
// Manage the currents selected values.
this._manageSelectedValue();
// Remove multiple attribute to match the behavior expected.
this._select.removeAttr("multiple");
},
/**
* Allow us to refresh the component?
*/
refresh : function() {
// this._container.empty();
this._select.empty();
this._spanContainer.empty();
this._initializeMultiSelect();
},
/**
* Destroy the component.
*/
_destroy : function() {
if (!this._container) {
return;
}
this.element.removeClass("vdubus-multiSelect-hidden");
this._container.remove();
}
});
})(jQuery);