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Add ablity to use with Angular Form #58

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Add ablity to use with Angular Form #58

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59 changes: 41 additions & 18 deletions lib/ng2-select2.component.ts
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Original file line number Diff line number Diff line change
@@ -1,17 +1,23 @@
import {
AfterViewInit, ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Input, OnChanges, OnDestroy,
Output, SimpleChanges, ViewChild, ViewEncapsulation, Renderer, OnInit
Output, SimpleChanges, ViewChild, ViewEncapsulation, Renderer, OnInit, forwardRef
} from '@angular/core';

import { Select2OptionData } from './ng2-select2.interface';

import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
export const SELECT2_VALUE_ACCESSOR: any = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => Select2Component),
multi: true
};
@Component({
selector: 'select2',
template: '<select #selector></select>',
encapsulation: ViewEncapsulation.None,
changeDetection: ChangeDetectionStrategy.OnPush
changeDetection: ChangeDetectionStrategy.OnPush,
providers: [SELECT2_VALUE_ACCESSOR],
})
export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, OnInit {
export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, OnInit, ControlValueAccessor {
@ViewChild('selector') selector: ElementRef;

// data for select2 drop down
Expand Down Expand Up @@ -39,13 +45,29 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
private check: boolean = false;

constructor(private renderer: Renderer) { }
public onChangeCb: (_: any) => void = (e) => { };
public onTouchedCb: () => void = () => { };

public writeValue(value: Object): void {

this.valueChanged.emit({
value
});
}

public registerOnChange(fn: any): void {
this.onChangeCb = fn;
}

public registerOnTouched(fn: any): void {
this.onTouchedCb = fn;
}
ngOnInit() {
if(this.cssImport) {
if (this.cssImport) {
const head = document.getElementsByTagName('head')[0];
const link: any = head.children[head.children.length-1];
const link: any = head.children[head.children.length - 1];

if(!link.version) {
if (!link.version) {
const newLink = this.renderer.createElement(head, 'style');
this.renderer.setElementProperty(newLink, 'type', 'text/css');
this.renderer.setElementProperty(newLink, 'version', 'select2');
Expand All @@ -56,11 +78,11 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
}

ngOnChanges(changes: SimpleChanges) {
if(!this.element) {
if (!this.element) {
return;
}

if(changes['data'] && JSON.stringify(changes['data'].previousValue) !== JSON.stringify(changes['data'].currentValue)) {
if (changes['data'] && JSON.stringify(changes['data'].previousValue) !== JSON.stringify(changes['data'].currentValue)) {
this.initPlugin();

const newValue: string = this.element.val();
Expand All @@ -69,7 +91,7 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
});
}

if(changes['value'] && changes['value'].previousValue !== changes['value'].currentValue) {
if (changes['value'] && changes['value'].previousValue !== changes['value'].currentValue) {
const newValue: string = changes['value'].currentValue;

this.setElementValue(newValue);
Expand All @@ -79,7 +101,7 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
});
}

if(changes['disabled'] && changes['disabled'].previousValue !== changes['disabled'].currentValue) {
if (changes['disabled'] && changes['disabled'].previousValue !== changes['disabled'].currentValue) {
this.renderer.setElementProperty(this.selector.nativeElement, 'disabled', this.disabled);
}
}
Expand All @@ -95,6 +117,7 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
}

this.element.on('select2:select select2:unselect', function () {
this.onChangeCb(that.element.val());
that.valueChanged.emit({
value: that.element.val()
});
Expand All @@ -106,8 +129,8 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
}

private initPlugin() {
if(!this.element.select2) {
if(!this.check) {
if (!this.element.select2) {
if (!this.check) {
this.check = true;
console.log("Please add Select2 library (js file) to the project. You can download it from https://github.com/select2/select2/tree/master/dist/js.");
}
Expand All @@ -128,7 +151,7 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On

Object.assign(options, this.options);

if(options.matcher) {
if (options.matcher) {
jQuery.fn.select2.amd.require(['select2/compat/matcher'], (oldMatcher: any) => {
options.matcher = oldMatcher(options.matcher);
this.element.select2(options);
Expand All @@ -141,18 +164,18 @@ export class Select2Component implements AfterViewInit, OnChanges, OnDestroy, On
this.element.select2(options);
}

if(this.disabled) {
if (this.disabled) {
this.renderer.setElementProperty(this.selector.nativeElement, 'disabled', this.disabled);
}
}

private setElementValue (newValue: string | string[]) {
if(Array.isArray(newValue)) {
private setElementValue(newValue: string | string[]) {
if (Array.isArray(newValue)) {
for (let option of this.selector.nativeElement.options) {
if (newValue.indexOf(option.value) > -1) {
this.renderer.setElementProperty(option, 'selected', 'true');
}
}
}
} else {
this.renderer.setElementProperty(this.selector.nativeElement, 'value', newValue);
}
Expand Down
1 change: 1 addition & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@
"@angular/compiler": "^2.4.4",
"@angular/compiler-cli": "^2.4.4",
"@angular/core": "^2.4.4",
"@angular/forms": "^2.4.4",
"@angular/platform-browser": "^2.4.4",
"@angular/platform-browser-dynamic": "^2.4.4",
"@types/node": "^7.0.0",
Expand Down