Implement DataGridTemplateColumn

src/Avalonia.DataGrid/DataGridTemplateColumn.cs

@@ -0,0 +1,69 @@
+// (c) Copyright Microsoft Corporation.
+// This source is subject to the Microsoft Public License (Ms-PL).
+// Please see http://go.microsoft.com/fwlink/?LinkID=131993 for details.
+// All other rights reserved.
+
+using Avalonia.Controls.Templates;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+using Avalonia.Utilities;
+
+namespace Avalonia.Controls
+{
+    public class DataGridTemplateColumn : DataGridColumn
+    {
+        IDataTemplate _cellTemplate;
+
+        public static readonly DirectProperty<DataGridTemplateColumn, IDataTemplate> CellTemplateProperty =
+            AvaloniaProperty.RegisterDirect<DataGridTemplateColumn, IDataTemplate>(
+                nameof(CellTemplate),
+                o => o.CellTemplate,
+                (o, v) => o.CellTemplate = v);
+
+        public IDataTemplate CellTemplate
+        {
+            get { return _cellTemplate; }
+            set { SetAndRaise(CellTemplateProperty, ref _cellTemplate, value); }
+        }
+
+        private void OnCellTemplateChanged(AvaloniaPropertyChangedEventArgs e)
+        {
+            //CellTemplateProperty.Changed.AddClassHandler<DataGridTemplateColumn>(x => x.OnCellTemplateChanged);
+            var oldValue = (IDataTemplate)e.OldValue;
+            var value = (IDataTemplate)e.NewValue;
+        }
+
+        public DataGridTemplateColumn()
+        {
+            IsReadOnly = true;
+        }
+
+        protected override IControl GenerateElement(DataGridCell cell, object dataItem)
+        {
+            if(CellTemplate != null)
+            {
+                return CellTemplate.Build(dataItem);
+            }
+            if (Design.IsDesignMode)
+            {
+                return null;
+            }
+            else
+            {
+                throw DataGridError.DataGridTemplateColumn.MissingTemplateForType(typeof(DataGridTemplateColumn));
+            }
+        }
+
+        protected override IControl GenerateEditingElement(DataGridCell cell, object dataItem, out ICellEditBinding binding)
+        {
+            binding = null;
+            return GenerateElement(cell, dataItem);
+        }
+
+        protected override object PrepareCellForEdit(IControl editingElement, RoutedEventArgs editingEventArgs)
+        {
+            return null;
+        }
+    }
+}