prs/prs.mobile/comal.timesheets/MobileGrid.cs

using InABox.Clients;
using InABox.Core;
using Syncfusion.SfDataGrid.XForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace comal.timesheets
{
    public abstract class MobileGrid : SfDataGrid
    {
        List<MobileGridDataModelShell> Data;

        public MobileGrid()
        {

        }

        public void Setup(List<MobileGridDataModelShell> data)
        {
            AutoGenerateColumns = false;
            AssignPropertiesToColumns(data);
            GenerateColumns(data.First());
            ColumnSizer = ColumnSizer.Star;
            AllowResizingColumn = true;
            AllowSorting = true;
            NavigationMode = NavigationMode.Row;
            SelectionMode = Syncfusion.SfDataGrid.XForms.SelectionMode.Single;
            SelectionUnit = SelectionUnit.Row;
            Data = data;

            Device.BeginInvokeOnMainThread(() =>
            {
                ItemsSource = data;
            });
        }

        protected void AssignPropertiesToColumns(List<MobileGridDataModelShell> data)
        {
            foreach (var shell in data)
            {
                if (shell.Data.Count > 0)
                    shell.Column1 = shell.Data[0].Item2;
                if (shell.Data.Count > 1)
                    shell.Column2 = shell.Data[1].Item2;
                if (shell.Data.Count > 2)
                    shell.Column3 = shell.Data[2].Item2;
                if (shell.Data.Count > 3)
                    shell.Column4 = shell.Data[3].Item2;
                if (shell.Data.Count > 4)
                    shell.Column5 = shell.Data[4].Item2;
            }
        }

        protected void GenerateColumns(MobileGridDataModelShell shell)
        {
            foreach (var col in shell.Data)
            {
                GenerateColumn(new Tuple<string, object>(col.Item1, col.Item2), shell.Data.IndexOf(col));
            }
            if (shell.HasImage)
            { 
                GenerateColumn(new Tuple<string, object>("Image", shell.Image), -1);
            }
        }

        protected void GenerateColumn(Tuple<string, object> col, int index)
        {
            if (index > 4)
                return;

            var column = FindColumnType(col.Item2);
            column = AddMapping(column, index);
            column = AddCaption(column, col.Item1);

            Device.BeginInvokeOnMainThread(() =>
            {
                Columns.Add(column);
            });
        }

        protected GridColumn FindColumnType(object value)
        {
            if(value == null || value.GetType() == typeof(ImageSource))
                return new GridImageColumn();
            if (value.GetType() == typeof(string))
                return new GridTextColumn();

            return new GridTextColumn();
        }

        protected GridColumn AddMapping(GridColumn col, int index)
        {
            switch (index)
            {
                case -1:
                    col.MappingName = "Image";
                    break;
                case 0:
                    col.MappingName = "Column1";
                    break;
                case 1:
                    col.MappingName = "Column2";
                    break;
                case 2:
                    col.MappingName = "Column3";
                    break;
                case 3:
                    col.MappingName = "Column4";
                    break;
                case 4:
                    col.MappingName = "Column5";
                    break;
            }
            return col;
        }

        protected GridColumn AddCaption(GridColumn col, string caption)
        {
            col.HeaderText = caption;
            col.HeaderCellTextSize = 18;
            col.HeaderFontAttribute = FontAttributes.Bold;

            return col;
        }
    }

    public class MobileGridDataModelShell
    {
        public Guid ID { get; set; }
        public List<Tuple<string, string>> Data { get; set; }

        public string Column1 { get; set; }
        public string Column2 { get; set; }
        public string Column3 { get; set; }
        public string Column4 { get; set; }
        public string Column5 { get; set; }

        public ImageSource Image { get; set; }

        public bool HasImage { get; set; }

        /// <summary>
        /// max of 5 columns to display on mobile
        /// </summary>
        /// <param name="id"></param>
        /// <param name="data"></param>
        public MobileGridDataModelShell(Guid id, List<Tuple<string, string>> data, Image image = null)
        {
            ID = id;
            Data = data;
            if (image != null)
            {
                Image = image.Source;
                HasImage = true;
            }
            else
            {
                Image = null;
                HasImage = false;
            }
        }
    }
}