DragDrop.cs

#region Copyright Syncfusion Inc. 2001-2022.
// Copyright Syncfusion Inc. 2001-2022. All rights reserved.
// Use of this code is subject to the terms of our license.
// A copy of the current license can be obtained at any time by e-mailing
// licensing@syncfusion.com. Any infringement will be prosecuted under
// applicable laws. 
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Com.Syncfusion.Schedule;
using Com.Syncfusion.Schedule.Enums;
using Java.Util;
using Android.Graphics;
using Java.Text;

namespace SampleBrowser
{
    /// <summary>
    /// sample for drag and drop of schedule appointment.
    /// </summary>
    public class DragDrop : SamplePage, IDisposable
    {
        /// <summary>
        /// schedule initialization.
        /// </summary>
        private SfSchedule sfSchedule;
        private Context context;

        public override View GetSampleContent(Context context)
        {
            this.context = context;
            LinearLayout linearLayout = new LinearLayout(context);
            linearLayout.Orientation = Orientation.Vertical;
          
            //creating instance for Schedule
            sfSchedule = new SfSchedule(context);
            sfSchedule.ScheduleView = ScheduleView.WeekView;
            sfSchedule.AllowAppointmentDrag = true;
            
            sfSchedule.AppointmentDrop += SfSchedule_AppointmentDrop;

            NonAccessibleBlock nonAccessibleBlock = new NonAccessibleBlock();
           
            //Create new instance of NonAccessibleBlocksCollection
            NonAccessibleBlocksCollection nonAccessibleBlocksCollection = new NonAccessibleBlocksCollection();
            WeekViewSettings weekViewSettings = new WeekViewSettings();
            nonAccessibleBlock.StartTime = 13;
            nonAccessibleBlock.EndTime = 14;
            nonAccessibleBlock.Text = "LUNCH";
            nonAccessibleBlock.Color = Color.Black;
            nonAccessibleBlocksCollection.Add(nonAccessibleBlock);
            weekViewSettings.NonAccessibleBlocks = nonAccessibleBlocksCollection;
            sfSchedule.WeekViewSettings = weekViewSettings;

            //set the appointment collection
            GetAppointments();
            sfSchedule.ItemsSource = appointmentCollection;
            linearLayout.AddView(sfSchedule);
            return linearLayout;
        }
        
        private void DisplayToast(string toastText)
        {
            Toast.MakeText(this.context, toastText, ToastLength.Short).Show();
        }

        /// <summary>
        /// drop event for schedule appointment.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void SfSchedule_AppointmentDrop(object sender, AppointmentDropEventArgs e)
        {
            e.Cancel = false;
            if (IsInNonAccessRegion(e.DropTime))
            {
                e.Cancel = true;
                DisplayToast("Cannot be moved to blocked time slots");
                return;
            }

            DisplayToast("Moved to " + GetFormattedDroppedTime(e.DropTime));
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic")]
        private string GetFormattedDroppedTime(Calendar dropTime)
        {
            var format = new SimpleDateFormat("EEEE, d MMMM, h:mm a");
            var date = format.Format(dropTime.Time);
            return date.ToString();
        }

        /// <summary>
        /// check the drop time in non-accessible region.
        /// </summary>
        /// <param name="dropTime"></param>
        /// <returns></returns>
        private bool IsInNonAccessRegion(Calendar dropTime)
        {
            if (this.sfSchedule.WeekViewSettings.NonAccessibleBlocks[0].StartTime == dropTime.Get(CalendarField.HourOfDay)
                || (this.sfSchedule.WeekViewSettings.NonAccessibleBlocks[0].StartTime - 1 == dropTime.Get(CalendarField.HourOfDay) && dropTime.Get(CalendarField.Minute) > 0))
            {
                return true;
            }

            return false;
        }
          
        private List<string> subjectCollection = new List<string>();
        private List<string> colorCollection = new List<string>();
        private List<Calendar> startTimeCollection = new List<Calendar>();
        private List<Calendar> endTimeCollection = new List<Calendar>();
        private ScheduleAppointmentCollection appointmentCollection;

        //Creating appointments for ScheduleAppointmentCollection
        private void GetAppointments()
        {
            appointmentCollection = new ScheduleAppointmentCollection();
            SetColors();
            RandomNumbers();
            SetSubjects();
            SetStartTime();
            SetEndTime();
            for (int i = 0; i < 10; i++)
            {
                var scheduleAppointment = new ScheduleAppointment();
                scheduleAppointment.Color = Color.ParseColor(colorCollection[i]);
                scheduleAppointment.Subject = subjectCollection[i];
                scheduleAppointment.StartTime = startTimeCollection[i];
                scheduleAppointment.EndTime = endTimeCollection[i];
                if (i == 2 || i == 4)
                {
                    scheduleAppointment.IsAllDay = true;
                }

                appointmentCollection.Add(scheduleAppointment);
            }
        }

        //adding subject collection
        private void SetSubjects()
        {
            subjectCollection = new List<String>();
            subjectCollection.Add("GoToMeeting");
            subjectCollection.Add("Business Meeting");
            subjectCollection.Add("Conference");
            subjectCollection.Add("Project Status Discussion");
            subjectCollection.Add("Auditing");
            subjectCollection.Add("Client Meeting");
            subjectCollection.Add("Generate Report");
            subjectCollection.Add("Target Meeting");
            subjectCollection.Add("General Meeting");
            subjectCollection.Add("Pay House Rent");
            subjectCollection.Add("Car Service");
            subjectCollection.Add("Medical Check Up");
            subjectCollection.Add("Wedding Anniversary");
            subjectCollection.Add("Sam's Birthday");
            subjectCollection.Add("Jenny's Birthday");
        }

        // adding colors collection
        private void SetColors()
        {
            colorCollection = new List<String>();
            colorCollection.Add("#FFA2C139");
            colorCollection.Add("#FFD80073");
            colorCollection.Add("#FF1BA1E2");
            colorCollection.Add("#FFE671B8");
            colorCollection.Add("#FFF09609");
            colorCollection.Add("#FF339933");
            colorCollection.Add("#FF00ABA9");
            colorCollection.Add("#FFE671B8");
            colorCollection.Add("#FF1BA1E2");
            colorCollection.Add("#FFD80073");
            colorCollection.Add("#FFA2C139");
            colorCollection.Add("#FFD80073");
            colorCollection.Add("#FF339933");
            colorCollection.Add("#FFE671B8");
            colorCollection.Add("#FF00ABA9");
        }

        private List<int> randomNums = new List<int>();

        private void RandomNumbers()
        {
            randomNums = new List<int>();
            Java.Util.Random rand = new Java.Util.Random();
            for (int i = 0; i < 10; i++)
            {
                int randomNum = rand.NextInt((15 - 9) + 1) + 9;
                randomNums.Add(randomNum);
            }
        }

        // adding StartTime collection
        private void SetStartTime()
        {
            startTimeCollection = new List<Calendar>();
            Calendar currentDate = Calendar.Instance;
            int count = 0;
            for (int i = -5; i < 5; i++)
            {
                Calendar startTime = (Calendar)currentDate.Clone();
                startTime.Set(
                    currentDate.Get(CalendarField.Year),
                    currentDate.Get(CalendarField.Month),
                    currentDate.Get(CalendarField.DayOfMonth) + i,
                    randomNums[count],
                    0,
                    0);
                startTimeCollection.Add(startTime);
                count++;
            }
        }

        // adding EndTime collection
        private void SetEndTime()
        {
            endTimeCollection = new List<Calendar>();
            Calendar currentDate = Calendar.Instance;
            int count = 0;
            for (int i = -5; i < 5; i++)
            {
                Calendar endTime = (Calendar)currentDate.Clone();
                endTime.Set(
                    currentDate.Get(CalendarField.Year),
                    currentDate.Get(CalendarField.Month),
                    currentDate.Get(CalendarField.DayOfMonth) + i,
                    randomNums[count] + 1,
                    0,
                    0);
                endTimeCollection.Add(endTime);
                count++;
            }
        }

        public void Dispose()
        {
            if (sfSchedule != null)
            {
                sfSchedule.AppointmentDrop -= SfSchedule_AppointmentDrop;
                sfSchedule.Dispose();
                sfSchedule = null;
            }
        }
    }
}