Made DoMerge overrideable

inabox.wpf/DynamicGrid/DynamicDataGrid.cs

@@ -82,7 +82,7 @@ public class DynamicDataGrid<TEntity> : DynamicGrid<TEntity>, IDynamicDataGrid w
 
         ColumnsComponent = new DynamicGridCustomColumnsComponent<TEntity>(this, GetTag());
 
-        MergeBtn = AddButton("Merge", Wpf.Resources.merge.AsBitmapImage(Color.White), DoMerge);
+        MergeBtn = AddButton("Merge", Wpf.Resources.merge.AsBitmapImage(Color.White), MergeClick);
     }
     protected override void DoReconfigure(DynamicGridOptions options)
     {
@@ -587,15 +587,20 @@ public class DynamicDataGrid<TEntity> : DynamicGrid<TEntity>, IDynamicDataGrid w
         return grid.EditItems(new[] { item }, t => children.ContainsKey(t) ? children[t] : null, true);
     }
 
-    private bool DoMerge(Button arg1, CoreRow[] arg2)
+    private bool MergeClick(Button arg1, CoreRow[] rows)
     {
-        if (arg2 == null || arg2.Length <= 1)
+        if (rows == null || rows.Length <= 1)
             return false;
-        var targetid = arg2.Last().Get<TEntity, Guid>(x => x.ID);
-        var target = arg2.Last().ToObject<TEntity>().ToString();
-        var otherids = arg2.Select(r => r.Get<TEntity, Guid>(x => x.ID)).Where(x => x != targetid).ToArray();
-        string[] others = arg2.Where(r => otherids.Contains(r.Get<Guid>("ID"))).Select(x => x.ToObject<TEntity>().ToString()!).ToArray();
-        var rows = arg2.Length;
+        return DoMerge(rows);
+    }
+
+    protected virtual bool DoMerge(CoreRow[] rows)
+    {
+        var targetid = rows.Last().Get<TEntity, Guid>(x => x.ID);
+        var target = rows.Last().ToObject<TEntity>().ToString();
+        var otherids = rows.Select(r => r.Get<TEntity, Guid>(x => x.ID)).Where(x => x != targetid).ToArray();
+        string[] others = rows.Where(r => otherids.Contains(r.Get<Guid>("ID"))).Select(x => x.ToObject<TEntity>().ToString()!).ToArray();
+        var nRows = rows.Length;
         if (MessageBox.Show(
                 string.Format(
                     "This will merge the following items:\n\n- {0}\n\n into:\n\n- {1}\n\nAfter this, the items will be permanently removed.\nAre you sure you wish to do this?",