ngu-multiselect-dropdown
Version:
Angular multiselect dropdown component for web applications. Easy to integrate and use. It can be bind to any custom data source and custom filter.
532 lines • 50.6 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: lib/multiselect-dropdown.component.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import { Component, HostListener, forwardRef, Input, Output, EventEmitter, ChangeDetectionStrategy, ChangeDetectorRef } from "@angular/core";
import { NG_VALUE_ACCESSOR } from "@angular/forms";
import { ListItem } from "./multiselect-dropdown.module";
import { ListFilterPipe } from "./list-filter.pipe";
/** @type {?} */
export const DROPDOWN_CONTROL_VALUE_ACCESSOR = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef((/**
* @return {?}
*/
() => MultiselectDropdownComponent)),
multi: true
};
/** @type {?} */
const noop = (/**
* @return {?}
*/
() => { });
const ɵ0 = noop;
export class MultiselectDropdownComponent {
/**
* @param {?} cdr
* @param {?} listFilterPipe
*/
constructor(cdr, listFilterPipe) {
this.cdr = cdr;
this.listFilterPipe = listFilterPipe;
this._data = [];
this.selectedItems = [];
this.isDropdownOpen = true;
this._placeholder = "Select";
this._sourceDataType = null; // to keep note of the source data type. could be array of string/number/object
// to keep note of the source data type. could be array of string/number/object
this._sourceDataFields = []; // store source data fields names
// store source data fields names
this.filter = new ListItem(this.data);
this.defaultSettings = {
singleSelection: false,
idField: "id",
textField: "text",
disabledField: "isDisabled",
enableCheckAll: true,
selectAllText: "Select All",
unSelectAllText: "UnSelect All",
allowSearchFilter: false,
limitSelection: -1,
clearSearchFilter: true,
maxHeight: 197,
itemsShowLimit: 999999999999,
searchPlaceholderText: "Search",
noDataAvailablePlaceholderText: "No data available",
closeDropDownOnSelection: false,
showSelectedItemsAtTop: false,
defaultOpen: false,
allowRemoteDataSearch: false,
};
this.disabled = false;
this.onFilterChange = new EventEmitter();
this.onDropDownClose = new EventEmitter();
this.onSelect = new EventEmitter();
this.onDeSelect = new EventEmitter();
this.onSelectAll = new EventEmitter();
this.onDeSelectAll = new EventEmitter();
this.onTouchedCallback = noop;
this.onChangeCallback = noop;
}
/**
* @param {?} value
* @return {?}
*/
set placeholder(value) {
if (value) {
this._placeholder = value;
}
else {
this._placeholder = "Select";
}
}
/**
* @param {?} value
* @return {?}
*/
set settings(value) {
if (value) {
this._settings = Object.assign(this.defaultSettings, value);
}
else {
this._settings = Object.assign(this.defaultSettings);
}
}
/**
* @param {?} value
* @return {?}
*/
set data(value) {
if (!value) {
this._data = [];
}
else {
/** @type {?} */
const firstItem = value[0];
this._sourceDataType = typeof firstItem;
this._sourceDataFields = this.getFields(firstItem);
this._data = value.map((/**
* @param {?} item
* @return {?}
*/
(item) => typeof item === "string" || typeof item === "number"
? new ListItem(item)
: new ListItem({
id: item[this._settings.idField],
text: item[this._settings.textField],
isDisabled: item[this._settings.disabledField]
})));
}
}
/**
* @param {?} $event
* @return {?}
*/
onFilterTextChange($event) {
this.onFilterChange.emit($event);
}
/**
* @param {?} $event
* @param {?} item
* @return {?}
*/
onItemClick($event, item) {
if (this.disabled || item.isDisabled) {
return false;
}
/** @type {?} */
const found = this.isSelected(item);
/** @type {?} */
const allowAdd = this._settings.limitSelection === -1 || (this._settings.limitSelection > 0 && this.selectedItems.length < this._settings.limitSelection);
if (!found) {
if (allowAdd) {
this.addSelected(item);
}
}
else {
this.removeSelected(item);
}
if (this._settings.singleSelection && this._settings.closeDropDownOnSelection) {
this.closeDropdown();
}
}
/**
* @param {?} value
* @return {?}
*/
writeValue(value) {
if (value !== undefined && value !== null && value.length > 0) {
if (this._settings.singleSelection) {
try {
if (value.length >= 1) {
/** @type {?} */
const firstItem = value[0];
this.selectedItems = [
typeof firstItem === "string" || typeof firstItem === "number"
? new ListItem(firstItem)
: new ListItem({
id: firstItem[this._settings.idField],
text: firstItem[this._settings.textField],
isDisabled: firstItem[this._settings.disabledField]
})
];
}
}
catch (e) {
// console.error(e.body.msg);
}
}
else {
/** @type {?} */
const _data = value.map((/**
* @param {?} item
* @return {?}
*/
(item) => typeof item === "string" || typeof item === "number"
? new ListItem(item)
: new ListItem({
id: item[this._settings.idField],
text: item[this._settings.textField],
isDisabled: item[this._settings.disabledField]
})));
if (this._settings.limitSelection > 0) {
this.selectedItems = _data.splice(0, this._settings.limitSelection);
}
else {
this.selectedItems = _data;
}
}
}
else {
this.selectedItems = [];
}
this.onChangeCallback(value);
}
// From ControlValueAccessor interface
/**
* @param {?} fn
* @return {?}
*/
registerOnChange(fn) {
this.onChangeCallback = fn;
}
// From ControlValueAccessor interface
/**
* @param {?} fn
* @return {?}
*/
registerOnTouched(fn) {
this.onTouchedCallback = fn;
}
// Set touched on blur
/**
* @return {?}
*/
onTouched() {
this.closeDropdown();
this.onTouchedCallback();
}
/**
* @param {?} index
* @param {?} item
* @return {?}
*/
trackByFn(index, item) {
return item.id;
}
/**
* @param {?} clickedItem
* @return {?}
*/
isSelected(clickedItem) {
/** @type {?} */
let found = false;
this.selectedItems.forEach((/**
* @param {?} item
* @return {?}
*/
item => {
if (clickedItem.id === item.id) {
found = true;
}
}));
return found;
}
/**
* @return {?}
*/
isLimitSelectionReached() {
return this._settings.limitSelection === this.selectedItems.length;
}
/**
* @return {?}
*/
isAllItemsSelected() {
// get disabld item count
/** @type {?} */
let filteredItems = this.listFilterPipe.transform(this._data, this.filter);
/** @type {?} */
const itemDisabledCount = filteredItems.filter((/**
* @param {?} item
* @return {?}
*/
item => item.isDisabled)).length;
// take disabled items into consideration when checking
if ((!this.data || this.data.length === 0) && this._settings.allowRemoteDataSearch) {
return false;
}
return filteredItems.length === this.selectedItems.length + itemDisabledCount;
}
/**
* @return {?}
*/
showButton() {
if (!this._settings.singleSelection) {
if (this._settings.limitSelection > 0) {
return false;
}
// this._settings.enableCheckAll = this._settings.limitSelection === -1 ? true : false;
return true; // !this._settings.singleSelection && this._settings.enableCheckAll && this._data.length > 0;
}
else {
// should be disabled in single selection mode
return false;
}
}
/**
* @return {?}
*/
itemShowRemaining() {
return this.selectedItems.length - this._settings.itemsShowLimit;
}
/**
* @param {?} item
* @return {?}
*/
addSelected(item) {
if (this._settings.singleSelection) {
this.selectedItems = [];
this.selectedItems.push(item);
}
else {
this.selectedItems.push(item);
}
this.onChangeCallback(this.emittedValue(this.selectedItems));
this.onSelect.emit(this.emittedValue(item));
}
/**
* @param {?} itemSel
* @return {?}
*/
removeSelected(itemSel) {
this.selectedItems.forEach((/**
* @param {?} item
* @return {?}
*/
item => {
if (itemSel.id === item.id) {
this.selectedItems.splice(this.selectedItems.indexOf(item), 1);
}
}));
this.onChangeCallback(this.emittedValue(this.selectedItems));
this.onDeSelect.emit(this.emittedValue(itemSel));
}
/**
* @param {?} val
* @return {?}
*/
emittedValue(val) {
/** @type {?} */
const selected = [];
if (Array.isArray(val)) {
val.map((/**
* @param {?} item
* @return {?}
*/
item => {
selected.push(this.objectify(item));
}));
}
else {
if (val) {
return this.objectify(val);
}
}
return selected;
}
/**
* @param {?} val
* @return {?}
*/
objectify(val) {
if (this._sourceDataType === 'object') {
/** @type {?} */
const obj = {};
obj[this._settings.idField] = val.id;
obj[this._settings.textField] = val.text;
if (this._sourceDataFields.includes(this._settings.disabledField)) {
obj[this._settings.disabledField] = val.isDisabled;
}
return obj;
}
if (this._sourceDataType === 'number') {
return Number(val.id);
}
else {
return val.text;
}
}
/**
* @param {?} evt
* @return {?}
*/
toggleDropdown(evt) {
evt.preventDefault();
if (this.disabled && this._settings.singleSelection) {
return;
}
this._settings.defaultOpen = !this._settings.defaultOpen;
if (!this._settings.defaultOpen) {
this.onDropDownClose.emit();
}
}
/**
* @return {?}
*/
closeDropdown() {
this._settings.defaultOpen = false;
// clear search text
if (this._settings.clearSearchFilter) {
this.filter.text = "";
}
this.onDropDownClose.emit();
}
/**
* @return {?}
*/
toggleSelectAll() {
if (this.disabled) {
return false;
}
if (!this.isAllItemsSelected()) {
// filter out disabled item first before slicing
this.selectedItems = this.listFilterPipe.transform(this._data, this.filter).filter((/**
* @param {?} item
* @return {?}
*/
item => !item.isDisabled)).slice();
this.onSelectAll.emit(this.emittedValue(this.selectedItems));
}
else {
this.selectedItems = [];
this.onDeSelectAll.emit(this.emittedValue(this.selectedItems));
}
this.onChangeCallback(this.emittedValue(this.selectedItems));
}
/**
* @param {?} inputData
* @return {?}
*/
getFields(inputData) {
/** @type {?} */
const fields = [];
if (typeof inputData !== "object") {
return fields;
}
// tslint:disable-next-line:forin
for (const prop in inputData) {
fields.push(prop);
}
return fields;
}
}
MultiselectDropdownComponent.decorators = [
{ type: Component, args: [{
selector: 'nu-multiselect-dropdown',
template: "<div tabindex=\"=0\" (blur)=\"onTouched()\" class=\"multiselect-dropdown\" (clickOutside)=\"closeDropdown()\">\r\n <div [class.disabled]=\"disabled\">\r\n <span tabindex=\"-1\" class=\"dropdown-btn\" (click)=\"toggleDropdown($event)\">\r\n <span *ngIf=\"selectedItems.length == 0\">{{_placeholder}}</span>\r\n <span class=\"selected-item\" *ngFor=\"let item of selectedItems;trackBy: trackByFn;let k = index\" [hidden]=\"k > _settings.itemsShowLimit-1\">\r\n {{item.text}}\r\n <a style=\"padding-top:2px;padding-left:2px;color:white\" (click)=\"onItemClick($event,item)\">x</a>\r\n </span>\r\n <span style=\"float:right !important;padding-right:4px\">\r\n <span style=\"padding-right: 6px;\" *ngIf=\"itemShowRemaining()>0\">+{{itemShowRemaining()}}</span>\r\n <span [ngClass]=\"_settings.defaultOpen ? 'dropdown-up' : 'dropdown-down'\"></span>\r\n </span>\r\n </span>\r\n </div>\r\n <div class=\"dropdown-list\" [hidden]=\"!_settings.defaultOpen\">\r\n <ul class=\"item1\">\r\n <li (click)=\"toggleSelectAll()\" *ngIf=\"(_data.length > 0 || _settings.allowRemoteDataSearch) && !_settings.singleSelection && _settings.enableCheckAll && _settings.limitSelection===-1\" class=\"multiselect-item-checkbox\" style=\"border-bottom: 1px solid #ccc;padding:10px\">\r\n <input type=\"checkbox\" aria-label=\"multiselect-select-all\" [checked]=\"isAllItemsSelected()\" [disabled]=\"disabled || isLimitSelectionReached()\" />\r\n <div>{{!isAllItemsSelected() ? _settings.selectAllText : _settings.unSelectAllText}}</div>\r\n </li>\r\n <li class=\"filter-textbox\" *ngIf=\"(_data.length>0 || _settings.allowRemoteDataSearch) && _settings.allowSearchFilter\">\r\n <input type=\"text\" aria-label=\"multiselect-search\" [readOnly]=\"disabled\" [placeholder]=\"_settings.searchPlaceholderText\" [(ngModel)]=\"filter.text\" (ngModelChange)=\"onFilterTextChange($event)\">\r\n </li>\r\n </ul>\r\n <ul class=\"item2\" [style.maxHeight]=\"_settings.maxHeight+'px'\">\r\n <li *ngFor=\"let item of _data | multiSelectFilter:filter; let i = index;\" (click)=\"onItemClick($event,item)\" class=\"multiselect-item-checkbox\">\r\n <input type=\"checkbox\" aria-label=\"multiselect-item\" [checked]=\"isSelected(item)\" [disabled]=\"disabled || (isLimitSelectionReached() && !isSelected(item)) || item.isDisabled\" />\r\n <div>{{item.text}}</div>\r\n </li>\r\n <li class='no-data' *ngIf=\"_data.length == 0 && !_settings.allowRemoteDataSearch\">\r\n <h5>{{_settings.noDataAvailablePlaceholderText}}</h5>\r\n </li>\r\n </ul>\r\n </div>\r\n </div>\r\n ",
providers: [DROPDOWN_CONTROL_VALUE_ACCESSOR],
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [".multiselect-dropdown{position:relative;width:100%;font-size:inherit;font-family:inherit}.multiselect-dropdown .dropdown-btn{display:inline-block;border:1px solid #adadad;width:100%;padding:6px 12px;margin-bottom:0;font-weight:400;line-height:1.52857143;text-align:left;vertical-align:middle;cursor:pointer;background-image:none;border-radius:4px}.multiselect-dropdown .dropdown-btn .selected-item{border:1px solid #337ab7;margin-right:4px;background:#337ab7;padding:0 5px;color:#fff;border-radius:2px;float:left}.multiselect-dropdown .dropdown-btn .selected-item a{text-decoration:none}.multiselect-dropdown .dropdown-btn .selected-item:hover{box-shadow:1px 1px #959595}.multiselect-dropdown .dropdown-btn .dropdown-down{display:inline-block;top:10px;width:0;height:0;border-top:10px solid #adadad;border-left:10px solid transparent;border-right:10px solid transparent}.multiselect-dropdown .dropdown-btn .dropdown-up{display:inline-block;width:0;height:0;border-bottom:10px solid #adadad;border-left:10px solid transparent;border-right:10px solid transparent}.multiselect-dropdown .disabled>span{background-color:#eceeef}.dropdown-list{position:absolute;padding-top:6px;width:100%;z-index:9999;border:1px solid #ccc;border-radius:3px;background:#fff;margin-top:10px;box-shadow:0 1px 5px #959595}.dropdown-list ul{padding:0;list-style:none;overflow:auto;margin:0}.dropdown-list li{padding:6px 10px;cursor:pointer;text-align:left}.dropdown-list .filter-textbox{border-bottom:1px solid #ccc;position:relative;padding:10px}.dropdown-list .filter-textbox input{border:0;width:100%;padding:0 0 0 26px}.dropdown-list .filter-textbox input:focus{outline:0}.multiselect-item-checkbox input[type=checkbox]{border:0;clip:rect(0 0 0 0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}.multiselect-item-checkbox input[type=checkbox]:focus+div:before,.multiselect-item-checkbox input[type=checkbox]:hover+div:before{border-color:#337ab7;background-color:#f2f2f2}.multiselect-item-checkbox input[type=checkbox]:active+div:before{transition-duration:0s}.multiselect-item-checkbox input[type=checkbox]+div{position:relative;padding-left:2em;vertical-align:middle;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;cursor:pointer;margin:0;color:#000}.multiselect-item-checkbox input[type=checkbox]+div:before{box-sizing:content-box;content:\"\";color:#337ab7;position:absolute;top:50%;left:0;width:14px;height:14px;margin-top:-9px;border:2px solid #337ab7;text-align:center;transition:.4s}.multiselect-item-checkbox input[type=checkbox]+div:after{box-sizing:content-box;content:\"\";position:absolute;transform:scale(0);transform-origin:50%;transition:transform .2s ease-out;background-color:transparent;top:50%;left:4px;width:8px;height:3px;margin-top:-4px;border-style:solid;border-color:#fff;border-width:0 0 3px 3px;-o-border-image:none;border-image:none;transform:rotate(-45deg) scale(0)}.multiselect-item-checkbox input[type=checkbox]:disabled+div:before{border-color:#ccc}.multiselect-item-checkbox input[type=checkbox]:disabled:focus+div:before .multiselect-item-checkbox input[type=checkbox]:disabled:hover+div:before{background-color:inherit}.multiselect-item-checkbox input[type=checkbox]:disabled:checked+div:before{background-color:#ccc}.multiselect-item-checkbox input[type=checkbox]:checked+div:after{content:\"\";transition:transform .2s ease-out;transform:rotate(-45deg) scale(1)}.multiselect-item-checkbox input[type=checkbox]:checked+div:before{-webkit-animation:.2s ease-in borderscale;animation:.2s ease-in borderscale;background:#337ab7}@-webkit-keyframes borderscale{50%{box-shadow:0 0 0 2px #337ab7}}@keyframes borderscale{50%{box-shadow:0 0 0 2px #337ab7}}"]
}] }
];
/** @nocollapse */
MultiselectDropdownComponent.ctorParameters = () => [
{ type: ChangeDetectorRef },
{ type: ListFilterPipe }
];
MultiselectDropdownComponent.propDecorators = {
placeholder: [{ type: Input }],
disabled: [{ type: Input }],
settings: [{ type: Input }],
data: [{ type: Input }],
onFilterChange: [{ type: Output, args: ["onFilterChange",] }],
onDropDownClose: [{ type: Output, args: ["onDropDownClose",] }],
onSelect: [{ type: Output, args: ["onSelect",] }],
onDeSelect: [{ type: Output, args: ["onDeSelect",] }],
onSelectAll: [{ type: Output, args: ["onSelectAll",] }],
onDeSelectAll: [{ type: Output, args: ["onDeSelectAll",] }],
onTouched: [{ type: HostListener, args: ["blur",] }]
};
if (false) {
/** @type {?} */
MultiselectDropdownComponent.prototype._settings;
/** @type {?} */
MultiselectDropdownComponent.prototype._data;
/** @type {?} */
MultiselectDropdownComponent.prototype.selectedItems;
/** @type {?} */
MultiselectDropdownComponent.prototype.isDropdownOpen;
/** @type {?} */
MultiselectDropdownComponent.prototype._placeholder;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype._sourceDataType;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype._sourceDataFields;
/** @type {?} */
MultiselectDropdownComponent.prototype.filter;
/** @type {?} */
MultiselectDropdownComponent.prototype.defaultSettings;
/** @type {?} */
MultiselectDropdownComponent.prototype.disabled;
/** @type {?} */
MultiselectDropdownComponent.prototype.onFilterChange;
/** @type {?} */
MultiselectDropdownComponent.prototype.onDropDownClose;
/** @type {?} */
MultiselectDropdownComponent.prototype.onSelect;
/** @type {?} */
MultiselectDropdownComponent.prototype.onDeSelect;
/** @type {?} */
MultiselectDropdownComponent.prototype.onSelectAll;
/** @type {?} */
MultiselectDropdownComponent.prototype.onDeSelectAll;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype.onTouchedCallback;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype.onChangeCallback;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype.cdr;
/**
* @type {?}
* @private
*/
MultiselectDropdownComponent.prototype.listFilterPipe;
}
export { ɵ0 };
//# 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{ Component, HostListener, forwardRef, Input, Output, EventEmitter, ChangeDetectionStrategy, ChangeDetectorRef } from \"@angular/core\";\nimport { NG_VALUE_ACCESSOR, ControlValueAccessor } from \"@angular/forms\";\nimport { ListItem, IDropdownSettings } from \"./multiselect-dropdown.module\";\nimport { ListFilterPipe } from \"./list-filter.pipe\";\n\nexport const DROPDOWN_CONTROL_VALUE_ACCESSOR: any = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => MultiselectDropdownComponent),\n  multi: true\n};\nconst noop = () => {};\n\n@Component({\n  selector: 'nu-multiselect-dropdown',\n  templateUrl: \"./multiselect-dropdown.component.html\",\n  styleUrls: [\"./multiselect-dropdown.component.scss\"],\n  providers: [DROPDOWN_CONTROL_VALUE_ACCESSOR],\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MultiselectDropdownComponent implements ControlValueAccessor {\n\n  public _settings: IDropdownSettings;\n  public _data: Array<ListItem> = [];\n  public selectedItems: Array<ListItem> = [];\n  public isDropdownOpen = true;\n  _placeholder = \"Select\";\n  private _sourceDataType = null; // to keep note of the source data type. could be array of string/number/object\n  private _sourceDataFields: Array<String> = []; // store source data fields names\n  filter: ListItem = new ListItem(this.data);\n  defaultSettings: IDropdownSettings = {\n    singleSelection: false,\n    idField: \"id\",\n    textField: \"text\",\n    disabledField: \"isDisabled\",\n    enableCheckAll: true,\n    selectAllText: \"Select All\",\n    unSelectAllText: \"UnSelect All\",\n    allowSearchFilter: false,\n    limitSelection: -1,\n    clearSearchFilter: true,\n    maxHeight: 197,\n    itemsShowLimit: 999999999999,\n    searchPlaceholderText: \"Search\",\n    noDataAvailablePlaceholderText: \"No data available\",\n    closeDropDownOnSelection: false,\n    showSelectedItemsAtTop: false,\n    defaultOpen: false,\n    allowRemoteDataSearch: false,\n  };\n\n  @Input()\n  public set placeholder(value: string) {\n    if (value) {\n      this._placeholder = value;\n    } else {\n      this._placeholder = \"Select\";\n    }\n  }\n  @Input()\n  disabled = false;\n\n  @Input()\n  public set settings(value: IDropdownSettings) {\n    if (value) {\n      this._settings = Object.assign(this.defaultSettings, value);\n    } else {\n      this._settings = Object.assign(this.defaultSettings);\n    }\n  }\n\n  @Input()\n  public set data(value: Array<any>) {\n    if (!value) {\n      this._data = [];\n    } else {\n      const firstItem = value[0];\n      this._sourceDataType = typeof firstItem;\n      this._sourceDataFields = this.getFields(firstItem);\n      this._data = value.map((item: any) =>\n        typeof item === \"string\" || typeof item === \"number\"\n          ? new ListItem(item)\n          : new ListItem({\n              id: item[this._settings.idField],\n              text: item[this._settings.textField],\n              isDisabled: item[this._settings.disabledField]\n            })\n      );\n    }\n  }\n\n  @Output(\"onFilterChange\")\n  onFilterChange: EventEmitter<ListItem> = new EventEmitter<any>();\n  @Output(\"onDropDownClose\")\n  onDropDownClose: EventEmitter<ListItem> = new EventEmitter<any>();\n\n  @Output(\"onSelect\")\n  onSelect: EventEmitter<ListItem> = new EventEmitter<any>();\n\n  @Output(\"onDeSelect\")\n  onDeSelect: EventEmitter<ListItem> = new EventEmitter<any>();\n\n  @Output(\"onSelectAll\")\n  onSelectAll: EventEmitter<Array<ListItem>> = new EventEmitter<Array<any>>();\n\n  @Output(\"onDeSelectAll\")\n  onDeSelectAll: EventEmitter<Array<ListItem>> = new EventEmitter<Array<any>>();\n\n  private onTouchedCallback: () => void = noop;\n  private onChangeCallback: (_: any) => void = noop;\n\n  onFilterTextChange($event) {\n    this.onFilterChange.emit($event);\n  }\n\n  constructor(private cdr: ChangeDetectorRef,private listFilterPipe:ListFilterPipe) {}\n\n  onItemClick($event: any, item: ListItem) {\n    if (this.disabled || item.isDisabled) {\n      return false;\n    }\n\n    const found = this.isSelected(item);\n    const allowAdd = this._settings.limitSelection === -1 || (this._settings.limitSelection > 0 && this.selectedItems.length < this._settings.limitSelection);\n    if (!found) {\n      if (allowAdd) {\n        this.addSelected(item);\n      }\n    } else {\n      this.removeSelected(item);\n    }\n    if (this._settings.singleSelection && this._settings.closeDropDownOnSelection) {\n      this.closeDropdown();\n    }\n  }\n\n  writeValue(value: any) {\n    if (value !== undefined && value !== null && value.length > 0) {\n      if (this._settings.singleSelection) {\n        try {\n          if (value.length >= 1) {\n            const firstItem = value[0];\n            this.selectedItems = [\n              typeof firstItem === \"string\" || typeof firstItem === \"number\"\n                ? new ListItem(firstItem)\n                : new ListItem({\n                    id: firstItem[this._settings.idField],\n                    text: firstItem[this._settings.textField],\n                    isDisabled: firstItem[this._settings.disabledField]\n                  })\n            ];\n          }\n        } catch (e) {\n          // console.error(e.body.msg);\n        }\n      } else {\n        const _data = value.map((item: any) =>\n          typeof item === \"string\" || typeof item === \"number\"\n            ? new ListItem(item)\n            : new ListItem({\n                id: item[this._settings.idField],\n                text: item[this._settings.textField],\n                isDisabled: item[this._settings.disabledField]\n              })\n        );\n        if (this._settings.limitSelection > 0) {\n          this.selectedItems = _data.splice(0, this._settings.limitSelection);\n        } else {\n          this.selectedItems = _data;\n        }\n      }\n    } else {\n      this.selectedItems = [];\n    }\n    this.onChangeCallback(value);\n  }\n\n  // From ControlValueAccessor interface\n  registerOnChange(fn: any) {\n    this.onChangeCallback = fn;\n  }\n\n  // From ControlValueAccessor interface\n  registerOnTouched(fn: any) {\n    this.onTouchedCallback = fn;\n  }\n\n  // Set touched on blur\n  @HostListener(\"blur\")\n  public onTouched() {\n    this.closeDropdown();\n    this.onTouchedCallback();\n  }\n\n  trackByFn(index, item) {\n    return item.id;\n  }\n\n  isSelected(clickedItem: ListItem) {\n    let found = false;\n    this.selectedItems.forEach(item => {\n      if (clickedItem.id === item.id) {\n        found = true;\n      }\n    });\n    return found;\n  }\n\n  isLimitSelectionReached(): boolean {\n    return this._settings.limitSelection === this.selectedItems.length;\n  }\n\n  isAllItemsSelected(): boolean {\n    // get disabld item count\n    let filteredItems = this.listFilterPipe.transform(this._data,this.filter);\n    const itemDisabledCount = filteredItems.filter(item => item.isDisabled).length;\n    // take disabled items into consideration when checking\n    if ((!this.data || this.data.length === 0) && this._settings.allowRemoteDataSearch) {\n      return false;\n    }\n    return filteredItems.length === this.selectedItems.length + itemDisabledCount;\n  }\n\n  showButton(): boolean {\n    if (!this._settings.singleSelection) {\n      if (this._settings.limitSelection > 0) {\n        return false;\n      }\n      // this._settings.enableCheckAll = this._settings.limitSelection === -1 ? true : false;\n      return true; // !this._settings.singleSelection && this._settings.enableCheckAll && this._data.length > 0;\n    } else {\n      // should be disabled in single selection mode\n      return false;\n    }\n  }\n\n  itemShowRemaining(): number {\n    return this.selectedItems.length - this._settings.itemsShowLimit;\n  }\n\n  addSelected(item: ListItem) {\n    if (this._settings.singleSelection) {\n      this.selectedItems = [];\n      this.selectedItems.push(item);\n    } else {\n      this.selectedItems.push(item);\n    }\n    this.onChangeCallback(this.emittedValue(this.selectedItems));\n    this.onSelect.emit(this.emittedValue(item));\n  }\n\n  removeSelected(itemSel: ListItem) {\n    this.selectedItems.forEach(item => {\n      if (itemSel.id === item.id) {\n        this.selectedItems.splice(this.selectedItems.indexOf(item), 1);\n      }\n    });\n    this.onChangeCallback(this.emittedValue(this.selectedItems));\n    this.onDeSelect.emit(this.emittedValue(itemSel));\n  }\n\n  emittedValue(val: any): any {\n    const selected = [];\n    if (Array.isArray(val)) {\n      val.map(item => {\n        selected.push(this.objectify(item));\n      });\n    } else {\n      if (val) {\n        return this.objectify(val);\n      }\n    }\n    return selected;\n  }\n\n  objectify(val: ListItem) {\n    if (this._sourceDataType === 'object') {\n      const obj = {};\n      obj[this._settings.idField] = val.id;\n      obj[this._settings.textField] = val.text;\n      if (this._sourceDataFields.includes(this._settings.disabledField)) {\n        obj[this._settings.disabledField] = val.isDisabled;\n      }\n      return obj;\n    }\n    if (this._sourceDataType === 'number') {\n      return Number(val.id);\n    } else {\n      return val.text;\n    }\n  }\n\n  toggleDropdown(evt) {\n    evt.preventDefault();\n    if (this.disabled && this._settings.singleSelection) {\n      return;\n    }\n    this._settings.defaultOpen = !this._settings.defaultOpen;\n    if (!this._settings.defaultOpen) {\n      this.onDropDownClose.emit();\n    }\n  }\n\n  closeDropdown() {\n    this._settings.defaultOpen = false;\n    // clear search text\n    if (this._settings.clearSearchFilter) {\n      this.filter.text = \"\";\n    }\n    this.onDropDownClose.emit();\n  }\n\n  toggleSelectAll() {\n    if (this.disabled) {\n      return false;\n    }\n    if (!this.isAllItemsSelected()) {\n      // filter out disabled item first before slicing\n      this.selectedItems =  this.listFilterPipe.transform(this._data,this.filter).filter(item => !item.isDisabled).slice();\n      this.onSelectAll.emit(this.emittedValue(this.selectedItems));\n    } else {\n      this.selectedItems = []