WPF DataGrid auto-scrolls horizontally on cell click hiding the beginning of text

[KirillOsenkov]

https://www.codeproject.com/Tips/5165488/Prevent-WPF-DataGrid-Auto-scrolling-Due-to-Clickin

[KirillOsenkov]

Related: #13

Stack:

  | PresentationFramework | RequestBringIntoViewEventArgs.InvokeEventHandler Line 53
-- | -- | --
  | PresentationCore | RoutedEventArgs.InvokeHandler Line 336
  | PresentationCore | RoutedEventHandlerInfo.InvokeHandler Line 84
  | PresentationCore | EventRoute.InvokeHandlersImpl Line 207
  | PresentationCore | UIElement.RaiseEventImpl Line 2340
  | PresentationCore | UIElement.RaiseEvent Line 420
  | PresentationFramework | FrameworkElement.BringIntoView Line 3314
  | PresentationFramework | FrameworkElement.OnGotFocus Line 5401
  | PresentationCore | UIElement.IsFocused_Changed Line 3558
  | WindowsBase | DependencyObject.OnPropertyChanged Line 2082
  | PresentationFramework | FrameworkElement.OnPropertyChanged Line 2076
  | WindowsBase | DependencyObject.NotifyPropertyChange Line 1757
  | WindowsBase | DependencyObject.UpdateEffectiveValue Line 1571
  | WindowsBase | DependencyObject.SetValueCommon Line 851
  | WindowsBase | DependencyObject.SetValue Line 594
  | PresentationCore | FocusManager.OnFocusedElementChanged Line 248
  | WindowsBase | DependencyObject.OnPropertyChanged Line 2082
  | PresentationFramework | FrameworkElement.OnPropertyChanged Line 2076
  | WindowsBase | DependencyObject.NotifyPropertyChange Line 1757
  | WindowsBase | DependencyObject.UpdateEffectiveValue Line 1571
  | WindowsBase | DependencyObject.SetValueCommon Line 851
  | WindowsBase | DependencyObject.SetValue Line 432
  | PresentationCore | FocusManager.SetFocusedElement Line 180
  | PresentationFramework | KeyboardNavigation.UpdateFocusedElement Line 962
  | PresentationFramework | FrameworkElement.OnGotKeyboardFocus Line 5370
  | PresentationCore | KeyboardFocusChangedEventArgs.InvokeEventHandler Line 76
  | PresentationCore | RoutedEventArgs.InvokeHandler Line 336
  | PresentationCore | RoutedEventHandlerInfo.InvokeHandler Line 84
  | PresentationCore | EventRoute.InvokeHandlersImpl Line 207
  | PresentationCore | UIElement.RaiseEventImpl Line 2340
  | PresentationCore | UIElement.RaiseTrustedEvent Line 457
  | PresentationCore | InputManager.ProcessStagingArea Line 829
  | PresentationCore | InputManager.ProcessInput Line 575
  | PresentationCore | KeyboardDevice.ChangeFocus Line 508
  | PresentationCore | KeyboardDevice.TryChangeFocus Line 405
  | PresentationCore | KeyboardDevice.Focus Line 197
  | PresentationCore | KeyboardDevice.Focus Line 163
  | PresentationCore | UIElement.Focus Line 2616
  | PresentationFramework | DataGridCell.OnAnyMouseLeftButtonDown Line 929
  | PresentationFramework | DataGridCell.OnAnyMouseLeftButtonDownThunk Line 891
  | PresentationCore | MouseButtonEventArgs.InvokeEventHandler Line 130
  | PresentationCore | RoutedEventArgs.InvokeHandler Line 336
  | PresentationCore | RoutedEventHandlerInfo.InvokeHandler Line 84
  | PresentationCore | EventRoute.InvokeHandlersImpl Line 207
  | PresentationCore | UIElement.ReRaiseEventAs Line 2289
  | PresentationCore | UIElement.OnMouseDownThunk Line 923
  | PresentationCore | MouseButtonEventArgs.InvokeEventHandler Line 130
  | PresentationCore | RoutedEventArgs.InvokeHandler Line 336
  | PresentationCore | RoutedEventHandlerInfo.InvokeHandler Line 84
  | PresentationCore | EventRoute.InvokeHandlersImpl Line 207
  | PresentationCore | UIElement.RaiseEventImpl Line 2340
  | PresentationCore | UIElement.RaiseTrustedEvent Line 457
  | PresentationCore | InputManager.ProcessStagingArea Line 829
  | PresentationCore | InputManager.ProcessInput Line 575
  | PresentationCore | InputProviderSite.ReportInput Line 106
  | PresentationCore | HwndMouseInputProvider.ReportInput Line 1298
  | PresentationCore | HwndMouseInputProvider.FilterMessage Line 508
  | PresentationCore | HwndSource.InputFilterMessage Line 1577
  | WindowsBase | HwndWrapper.WndProc Line 295
  | WindowsBase | HwndSubclass.DispatcherCallbackOperation Line 429
  | WindowsBase | ExceptionWrapper.InternalRealCall Line 103
  | WindowsBase | ExceptionWrapper.TryCatchWhen Line 36
  | WindowsBase | Dispatcher.LegacyInvokeImpl Line 1331
  | WindowsBase | HwndSubclass.SubclassWndProc Line 341
  |   | [IL Method without Metadata]
  |   | [Internal Frame, 'M-->U']
  | WindowsBase | Dispatcher.PushFrameImpl Line 2137
  | WindowsBase | Dispatcher.PushFrame Line 331
  | WindowsBase | Dispatcher.Run Line 299
  | PresentationFramework | Application.RunDispatcher Line 2403
  | PresentationFramework | Application.RunInternal Line 1694
  | PresentationFramework | Application.Run Line 198
  | wpf | App.Main

[KirillOsenkov]

This line does Focus, which then brings the cell into view:
https://github.com/dotnet/wpf/blob/731a087712012d2ae86ac07995987ca4ccc4f728/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/DataGridCell.cs#L929

[KirillOsenkov]

Workaround:

            var style = new Style();
            style.Setters.Add(new EventSetter(FrameworkElement.RequestBringIntoViewEvent, (RequestBringIntoViewEventHandler)OnRequestBringIntoView));
            dataGrid.ItemContainerStyle = style;

            void OnRequestBringIntoView(object sender, RequestBringIntoViewEventArgs e)
            {
                if (e.OriginalSource is DataGridCell && e.TargetRect == Rect.Empty)
                {
                    e.Handled = true;
                }
            }

[KirillOsenkov]

https://stackoverflow.com/questions/2064848/wpf-datagrid-how-do-i-stop-auto-scrolling-when-a-cell-is-clicked