Multi-Event Selection & Bulk Actions

Multiple event selection can be turned on with the selectMultipleEvents option. Selecting multiple events can be done through user interaction with CTRL/SHIFT/CMD + click or programmatically eg. click of a button or 'select all' checkbox.

Bulk operations like delete, update can be applied the selected events. Things like deleting with the backspace or delete buttons work out of the box but custom actions can be also applied. The selection can be easily retrieved and updated with the selectedEvents option and the onSelectedEventsChange event.

Custom actions can be performed with external buttons or with context menu activated on right-click.

Get started with this example

Demo

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Select multiple events in a agenda view with keyboard shortcuts, or programmatically — bulk delete/update, or right-click for per-event edits.

Code

View code on GitHub 
import { CommonModule } from '@angular/common';
import { HttpClient } from '@angular/common/http';
import { Component, OnInit, ViewChild } from '@angular/core';
import { FormsModule } from '@angular/forms';
import {
  formatDate,
  MbscCalendarEvent,
  MbscEventcalendar,
  MbscEventcalendarOptions,
  MbscModule,
  MbscSelect,
  MbscSelectOptions,
  Notifications,
  setOptions ,
} from '@mobiscroll/angular';

setOptions({
  locale:  ,
  theme: ' ',
  themeVariant: ' '
});

@Component({
  selector: 'app-root', 
  templateUrl: './app.component.html',
  providers: [Notifications],
  standalone: true,
  imports: [CommonModule, FormsModule, MbscModule],
})
export class AppComponent implements OnInit {
  constructor(
    private http: HttpClient,
    private notify: Notifications,
  ) {}

  @ViewChild('calendar', { static: false })
  calendar!: MbscEventcalendar;

  @ViewChild('menu', { static: false })
  menu!: MbscSelect;

  confirmOpen = false;
  myEvents: MbscCalendarEvent[] = [];
  selectedEvent?: MbscCalendarEvent;
  selectedEvents: MbscCalendarEvent[] = [];
  menuAction: string | null = null;
  menuAnchor!: HTMLElement;

  calendarOptions: MbscEventcalendarOptions = {
    selectMultipleEvents: true,
    view: {
      agenda: { type: 'month' },
    },
    onEventUpdate: (args) => {
      if (args.isDelete) {
        if (!this.confirmOpen) {
          this.deleteSelectedEvents();
        }
        return false;
      }
      return true;
    },
    onEventDelete: () => {
      if (!this.confirmOpen) {
        this.deleteSelectedEvents();
        return false;
      }
      return true;
    },
    onEventRightClick: (args) => {
      args.domEvent.preventDefault();
      this.selectedEvent = args.event;
      this.menuAnchor = args.domEvent.target;
      setTimeout(() => {
        this.menu.open();
      });
    },
  };

  menuOptions: MbscSelectOptions = {
    buttons: [],
    data: [
      { value: 'update', text: 'Update' },
      { value: 'delete', text: 'Delete' },
    ],
    display: 'anchored',
    touchUi: false,
    onChange: (args) => {
      if (args.value === 'update') {
        this.updateSelectedEvents();
      } else if (args.value === 'delete') {
        this.deleteSelectedEvents();
      }
    },
    onClose: () => {
      setTimeout(() => {
        // Clear selection
        this.menuAction = null;
      });
    },
  };

  updateSelectedEvents(): void {
    const updatedEvents = [...this.myEvents];
    const events = this.selectedEvents.length === 0 && this.selectedEvent ? [this.selectedEvent] : this.selectedEvents;
    for (const event of events) {
      const index = updatedEvents.findIndex((x) => x.id === event.id);
      // Handle recurring event occurrence
      if (event.recurring) {
        // Create a new event, with updated color and id
        const newEvent: MbscCalendarEvent = {
          ...event,
          color: 'orange',
          id: event.id + '_' + formatDate('YYYY-MM-DD', event.start as Date),
          recurring: undefined,
        };
        // Update the original event with a recurring exception
        const updatedEvent = event.original!;
        const updatedExceptionDates = (updatedEvent.recurringException as Date[]) || [];
        updatedExceptionDates.push(event.start as Date);
        updatedEvent.recurringException = updatedExceptionDates;
        updatedEvents.splice(index, 1, updatedEvent);
        updatedEvents.push(newEvent);
      } else {
        // Update the event color
        const updatedEvent = { ...event, color: 'orange' };
        updatedEvents.splice(index, 1, updatedEvent);
      }
    }
    this.myEvents = updatedEvents;
    this.selectedEvents = [];
    this.notify.toast({
      message: "All selected event's color changed to orange",
    });
  }

  deleteSelectedEvents(): void {
    const events = this.selectedEvents.length === 0 && this.selectedEvent ? [this.selectedEvent] : this.selectedEvents;
    this.confirmOpen = true;
    this.notify.confirm({
      title: 'Are you sure you want to delete the following events?',
      message: events.map((e) => e.title).join(', '),
      okText: 'Delete',
      callback: (result) => {
        if (result) {
          const updatedEvents = [...this.myEvents];
          for (const event of events) {
            const index = updatedEvents.findIndex((x) => x.id === event.id);
            // Handle recurring event occurrence
            if (event.recurring) {
              // Update the original event with a recurring exception
              const updatedEvent = event.original!;
              const updatedExceptionDates = (updatedEvent.recurringException as Date[]) || [];
              updatedExceptionDates.push(event.start as Date);
              updatedEvent.recurringException = updatedExceptionDates;
              updatedEvents.splice(index, 1, updatedEvent);
            } else {
              // Remove the event
              updatedEvents.splice(index, 1);
            }
          }
          this.myEvents = updatedEvents;
          this.selectedEvents = [];
          this.notify.toast({
            message: 'Deleted',
          });
        }
        this.confirmOpen = false;
      },
    });
  }

  selectAllEvents(): void {
    this.selectedEvents = this.calendar.getEvents();
    this.notify.toast({
      message: 'All events selected from view',
    });
  }

  resetSelection(): void {
    this.selectedEvents = [];
    this.notify.toast({
      message: 'Selection cleared',
    });
  }

  onKeyDown(ev: KeyboardEvent): void {
    if (!this.confirmOpen && (ev.code === 'Delete' || ev.code === 'Backspace' || ev.keyCode === 8 || ev.keyCode === 46)) {
      this.deleteSelectedEvents();
    }
  }

  ngOnInit(): void {
    this.http.jsonp<MbscCalendarEvent[]>('https://trial.mobiscroll.com/events/?vers=5', 'callback').subscribe((resp) => {
      this.myEvents = resp;
    });
  }
}

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