Drew13 Drew13 - 1 month ago 68
TypeScript Question

Close Angular 2 Bootstrap DatePicker after choosing date

I have two different

datepickers
that I want to close after I choose a date. I keep finding things online about
autoclose: true
but I can't figure out how/where to set it. I'm able to choose dates and have the change show in the input and everything, but I want the
datepicker
to close immediately upon choosing the first date.

<form class="form-inline">
<div>
<div class="form-group" [ngClass]="{'has-error':!secondForm.controls['startDate'].valid && secondForm.controls['startDate'].touched}">
<label>Start Date:</label>
<input style="width:250px" [value]="getStartDate()" class="form-control" type="text" [formControl]="secondForm.controls['startDate']">
</div>
<div style="display:inline-block">
<ngb-datepicker id="special" *ngIf="startCheck==true;" [(ngModel)]="dt" class="dropdown-toggle" [ngModelOptions]="{standalone: true}"></ngb-datepicker>
</div>
<button type="button" class="btn icon-calendar" (click)="showStartDatePick()"></button>
<div class="form-group" [ngClass]="{'has-error':!secondForm.controls['endDate'].valid && secondForm.controls['endDate'].touched}">
<label>End Date:</label>
<input style="width:250px" [value]="getEndDate()" class="form-control" type="text" [formControl]="secondForm.controls['endDate']">
</div>
<div style="display:inline-block">
<ngb-datepicker id="special" *ngIf="endCheck==true;" [(ngModel)]="dt2" class="dropdown-toggle" [ngModelOptions]="{standalone: true}"></ngb-datepicker>
</div>
<button type="button" class="btn icon-calendar" (click)="showEndDatePick()"></button>
<button type="button" class="btn icon-search" [disabled]="!secondForm.valid"></button>
</div>
</form>


Corresponding Typescript:

import { Component } from '@angular/core';
import { FormGroup, FormBuilder, Validators } from '@angular/forms';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
import {NgbDateStruct} from '@ng-bootstrap/ng-bootstrap';
import {DatePipe} from "@angular/common";

@Component({
selector: 'calendar-pick',
styleUrls: ['../app.component.css'],
templateUrl: './calendarpick.component.html',
providers: [DatePipe]
})

export class CalendarPickComponent {
public dt: NgbDateStruct;
public dt2: NgbDateStruct;
public startCheck: boolean = false;
public endCheck: boolean = false;
secondForm : FormGroup;

public constructor(fb: FormBuilder, private datePipe: DatePipe) {
this.secondForm = fb.group({
'startDate' : [this.dt, Validators.required],
'endDate' : [this.dt2, Validators.required]
})
this.secondForm.valueChanges.subscribe( (form: any) => {
console.log('form changed to:', form);
}
);
}

public getStartDate(): void {
let timestamp = this.dt != null ? new Date(this.dt.year, this.dt.month-1, this.dt.day).getTime() : new Date().getTime();
this.secondForm.controls['startDate'].setValue(this.datePipe.transform(timestamp, 'fullDate'));
}

public getEndDate(): void {
let timestamp = this.dt2 != null ? new Date(this.dt2.year, this.dt2.month-1, this.dt2.day).getTime() : new Date().getTime();
this.secondForm.controls['endDate'].setValue(this.datePipe.transform(timestamp, 'fullDate'));
}

public showStartDatePick():void {
if (this.startCheck == false){
this.startCheck = true;
} else {
this.startCheck = false;
}
}

public showEndDatePick():void {
if (this.endCheck == false){
this.endCheck = true;
} else {
this.endCheck = false;
}
}
}

Answer

This can be achieved by attaching a function to fire on ngModelChange like so:

<ngb-datepicker *ngIf="startCheck;" [(ngModel)]="startDate" (ngModelChange)="showDatePick(0)" class="dropdown-toggle" [ngModelOptions]="{standalone: true}" style="position:absolute; z-index:1"></ngb-datepicker>

This feels a touch hacky to me with the [(ngModel)] and (ngModelChange) but the first is ensuring the two way binding directly and the second is adding a layer of do this thing on change.

To handle it for two pass an argument into showDatePick and flip the appropriate boolean to false:

public showDatePick(selector):void {
    if(selector === 0) {
      this.startCheck = !this.startCheck
    } else {
      this.endCheck = !this.endCheck;
    }
}

And with the inputs we're going to get a little clever with our setting so that we can reuse the same code, because if a bit of code is 99% the same there's probably a way to make it all one thing:

<input style="width:250px" [value]="getDate('start')" class="form-control" type="text" [formControl]="secondForm.controls['startDate']">

And the getDate function:

public getDate(dateName: string) {
    let workingDateName = dateName + 'Date';
    let timestamp = this[workingDateName] != null ? new Date(this[workingDateName].year, this[workingDateName].month-1, this[workingDateName].day).getTime() : new Date().getTime();
    this.secondForm.controls[dateName + 'Date'].setValue(this.datePipe.transform(timestamp, 'fullDate'));
  }

Working example to mess with: http://plnkr.co/edit/BtBUvNYeUYFgr1VmACS3?p=preview