DrillDown.cs

#region Copyright Syncfusion® Inc. 2001-2025.
// Copyright Syncfusion® Inc. 2001-2025. 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.Collections.ObjectModel;
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 Android.Graphics;
using Syncfusion.SfSunburstChart.Android;

namespace SampleBrowser
{
    [Preserve(AllMembers = true)]
    public class DrillDown : SamplePage
    {
        SfSunburstChart chart;
        public ObservableCollection<SunburstModel> DataSource { get; set; }
        public override View GetSampleContent(Context context)
        {          
          
            this.DataSource = new ObservableCollection<SunburstModel>
            {
                new SunburstModel { Country = "USA", JobDescription = "Sales", JobGroup="Executive", EmployeesCount = 50 },
                new SunburstModel { Country = "USA", JobDescription = "Sales", JobGroup = "Analyst", EmployeesCount = 40 },
                new SunburstModel { Country = "USA", JobDescription = "Marketing", EmployeesCount = 40 },
                new SunburstModel { Country = "USA", JobDescription = "Technical", JobGroup = "Testers", EmployeesCount = 35 },
                new SunburstModel { Country = "USA", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Windows", EmployeesCount = 175 },
                new SunburstModel { Country = "USA", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Web", EmployeesCount = 70 },
                new SunburstModel { Country = "USA", JobDescription = "Management", EmployeesCount = 40 },
                new SunburstModel { Country = "USA", JobDescription = "Accounts", EmployeesCount = 60 },

                new SunburstModel { Country = "India", JobDescription = "Technical", JobGroup = "Testers", EmployeesCount = 33 },
                new SunburstModel { Country = "India", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Windows", EmployeesCount = 125 },
                new SunburstModel { Country = "India", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Web", EmployeesCount = 60 },
                new SunburstModel { Country = "India", JobDescription = "HR Executives", EmployeesCount = 70 },
                new SunburstModel { Country = "India", JobDescription = "Accounts", EmployeesCount = 45 },

                new SunburstModel { Country = "Germany", JobDescription = "Sales", JobGroup = "Executive", EmployeesCount = 30 },
                new SunburstModel { Country = "Germany", JobDescription = "Sales", JobGroup = "Analyst", EmployeesCount = 40 },
                new SunburstModel { Country = "Germany", JobDescription = "Marketing", EmployeesCount = 50 },
                new SunburstModel { Country = "Germany", JobDescription = "Technical", JobGroup = "Testers", EmployeesCount = 40 },
                new SunburstModel { Country = "Germany", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Windows", EmployeesCount = 65 },
                new SunburstModel { Country = "Germany", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Web", EmployeesCount = 27 },
                new SunburstModel { Country = "Germany", JobDescription = "Management", EmployeesCount = 33 },
                new SunburstModel { Country = "Germany", JobDescription = "Accounts", EmployeesCount = 55 },

                new SunburstModel { Country = "UK", JobDescription = "Technical", JobGroup = "Testers", EmployeesCount = 25 },
                new SunburstModel { Country = "UK", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Windows", EmployeesCount = 96 },
                new SunburstModel { Country = "UK", JobDescription = "Technical", JobGroup = "Developers", JobRole = "Web", EmployeesCount = 55 },
                new SunburstModel { Country = "UK", JobDescription = "HR Executives", EmployeesCount = 60 },
                new SunburstModel { Country = "UK", JobDescription = "Accounts", EmployeesCount = 30 }
            };

            chart = new SfSunburstChart(context);
            chart.ItemsSource = DataSource;
            chart.Radius = 0.95;
            chart.ValueMemberPath = "EmployeesCount";
            var levels = new SunburstLevelCollection()
            {
                new SunburstHierarchicalLevel() { GroupMemberPath = "Country"},
                new SunburstHierarchicalLevel() { GroupMemberPath = "JobDescription"},
                new SunburstHierarchicalLevel() { GroupMemberPath = "JobGroup"},
                new SunburstHierarchicalLevel() { GroupMemberPath = "JobRole"}
            };
            chart.Levels = levels;

            chart.Title.IsVisible = true;
            chart.Title.Margin = new Thickness(10, 40 * context.Resources.DisplayMetrics.Density, 5, 5);
            chart.Title.Text = "Employees Count";
            chart.Title.TextSize = 20;

            chart.Legend.IsVisible = true;

            chart.DataLabel.ShowLabel = true;           

            chart.DrilldownSettings.Enable = true;

            var label = new TextView(context);
            label.SetPadding(5, 5, 5, 5);
            label.Text = "Double tap on the segment to perform drill down.";
            label.TextSize = 16;
            label.SetTextColor(Color.Red);            
            label.SetX(0);
            label.SetY(0);
            chart.AddView(label);

            return chart;
        }
    }
}