Multi-Select & Bulk Event 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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Preview in full screen

Select multiple events on a Timeline by keyboard shortcut or button, then apply bulk delete or update — a side panel tracks the selection.

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;

  myEvents: MbscCalendarEvent[] = [];

  mySelectedEvents: MbscCalendarEvent[] = [];
  eventTitles: string[] = [];
  selectValue: string | null = null;
  firstDay!: Date;
  lastDay!: Date;
  menuAnchor!: HTMLElement;
  confirmOpen = false;

  getSelectedEventTitles(events: MbscCalendarEvent[]) {
    let titles: string[] = [];
    for (const event of events) {
      titles = [...titles, event.title!];
    }
    return titles;
  }

  refreshSelectedEvents(events: MbscCalendarEvent[]) {
    this.mySelectedEvents = events;
    this.eventTitles = this.getSelectedEventTitles(events);
  }

  updateSelectedEvents() {
    const events = this.mySelectedEvents;
    let eventsToUpdate = [...this.myEvents];
    for (const event of events) {
      if (event.recurring) {
        const origEvent = event.original!;
        const exc = (origEvent.recurringException as string[]) || [];
        const newEvent = event;

        newEvent.recurring = undefined;
        newEvent.color = 'orange';
        newEvent.id += '_' + formatDate('YYYY-MM-DD', new Date(event.start as string));
        eventsToUpdate = [...eventsToUpdate, newEvent];

        origEvent.recurringException = [...exc, event.start];

        // Update the event in the list
        const index = eventsToUpdate.findIndex((x) => x.id === origEvent['id']);
        eventsToUpdate.splice(index, 1, origEvent);
      } else {
        const newEv = event;
        newEv.color = 'orange';
        const index = eventsToUpdate.findIndex((x) => x.id === newEv.id);
        eventsToUpdate.splice(index, 1, newEv);
      }
    }

    this.myEvents = eventsToUpdate;
    this.refreshSelectedEvents([]);

    this.notify.toast({
      message: "All selected event's color changed to orange",
    });
  }

  deleteSelectedEvents() {
    this.confirmOpen = true;
    this.notify.confirm({
      title: 'Are you sure you want to delete the following events?',
      message: this.getSelectedEventTitles(this.mySelectedEvents).join(','),
      okText: 'Delete',
      callback: (result) => {
        if (result) {
          let eventsToUpdate = [...this.myEvents];

          for (const event of this.mySelectedEvents) {
            if (event.recurring) {
              const origEvent = event.original!;
              const exc = (origEvent.recurringException as string[]) || [];
              origEvent.recurringException = [...exc, event.start];

              // Update the event in the list
              const index = eventsToUpdate.findIndex((x) => x.id === origEvent['id']);
              eventsToUpdate.splice(index, 1, origEvent);
            } else {
              eventsToUpdate = eventsToUpdate.filter((ev) => ev.id !== event.id);
            }
          }

          this.myEvents = eventsToUpdate;
          this.refreshSelectedEvents([]);

          this.notify.toast({
            message: 'Deleted',
          });
        }
        this.confirmOpen = false;
      },
    });
  }

  calendarOptions: MbscEventcalendarOptions = {
    clickToCreate:  ,
    dragToCreate:  ,
    dragToMove:  ,
    dragToResize:  ,
    eventDelete:  ,
    selectMultipleEvents: true,
    view: {
      timeline: {
        type: 'week',
      },
    },
    resources: [
      {
        id: 1,
        name: 'Ryan',
        color: '#fdf500',
      },
      {
        id: 2,
        name: 'Kate',
        color: '#ff4600',
      },
      {
        id: 3,
        name: 'John',
        color: '#ff0101',
      },
      {
        id: 4,
        name: 'Mark',
        color: '#239a21',
      },
      {
        id: 5,
        name: 'Sharon',
        color: '#8f1ed6',
      },
      {
        id: 6,
        name: 'Ashley',
        color: '#01adff',
      },
    ],
    onEventUpdate: (args) => {
      if (args.isDelete) {
        if (!this.confirmOpen) {
          this.deleteSelectedEvents();
        }
        return false;
      }
      return true;
    },
    onEventDelete: () => {
      if (!this.confirmOpen) {
        this.deleteSelectedEvents();
      }
      return false;
    },
    onPageLoading: (args) => {
      setTimeout(() => {
        this.firstDay = args.firstDay;
        this.lastDay = args.lastDay;
      });
    },
    onSelectedEventsChange: (args) => {
      this.refreshSelectedEvents(args.events);
    },
    onEventRightClick: (args) => {
      args.domEvent.preventDefault();
      this.menuAnchor = args.domEvent.target;
      setTimeout(() => {
        this.menu.open();
      });
    },
  };

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

  selectAllEvents() {
    this.refreshSelectedEvents(this.calendar.getEvents(this.firstDay, this.lastDay));
    this.notify.toast({
      message: 'All events selected from view',
    });
  }

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

  onKeyDown(ev: any) {
    if (!this.confirmOpen && (ev.keyCode === 8 || ev.keyCode === 46)) {
      this.deleteSelectedEvents();
    }
  }

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

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