protected override void OnKeyDown(KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
DataGridRow rowContainer = (DataGridRow)this.ItemContainerGenerator.ContainerFromItem(this.CurrentItem);
if (rowContainer != null)
{
int columnIndex = this.Columns.IndexOf(this.CurrentColumn);
DataGridCellsPresenter presenter = Helper.FindVisualChild <DataGridCellsPresenter>(rowContainer);
if (columnIndex == Columns.Count() - 1)
{
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
request.Wrapped = true;
cell.MoveFocus(request);
//BeginEdit();
PressKey(Key.Down);
}
else
{
CommitEdit();
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
request.Wrapped = true;
cell.MoveFocus(request);
}
SelectedItem = CurrentItem;
e.Handled = true;
//UpdateLayout();
}
}
}
private void DataGrid_PreviewKeyDown(object sender, KeyEventArgs e)
{
DataGrid dataGrid = sender as DataGrid;
if (dataGrid == null)
{
return;
}
if (e.Key == Key.Enter || e.Key == Key.Down || e.Key == Key.Up || e.Key == Key.Right || e.Key == Key.Left)
{
if (dataGrid.ItemsSource != null && dataGrid.SelectedIndex == dataGrid.Items.Count - 2)
{
var border = VisualTreeHelper.GetChild(dataGrid, 0) as Decorator;
if (border != null)
{
var scroll = border.Child as ScrollViewer;
if (scroll != null)
{
scroll.ScrollToEnd();
}
}
}
}
if (e.Key == Key.Enter)
{
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
request.Wrapped = true;
DataGridRow rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.CurrentItem);
if (rowContainer != null)
{
int columnIndex = dataGrid.Columns.IndexOf(dataGrid.CurrentColumn);
System.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <System.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
dataGrid.CommitEdit();
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.MoveFocus(request);
dataGrid.SelectedItem = dataGrid.CurrentItem;
e.Handled = true;
dataGrid.UpdateLayout();
dataGrid.BeginEdit(e);
}
}
else if (e.Key == Key.Down || e.Key == Key.Up || e.Key == Key.Right || e.Key == Key.Left)
{
int columnIndex = dataGrid.Columns.IndexOf(dataGrid.CurrentColumn);
DataGridRow rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.CurrentItem);
if (rowContainer != null)
{
System.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <System.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
DataGridCell currentcell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
if (currentcell.Content is ContentPresenter)
{
DatePickerCus datepicker = FindVisualChild <DatePickerCus>(currentcell);
if (datepicker != null && datepicker.IsDropDownOpen)
{
e.Handled = true;
return;
}
ComboBoxWithSearch combo = FindVisualChild <ComboBoxWithSearch>(currentcell);
if (combo != null && combo.IsDropDownOpen)
{
e.Handled = true;
return;
}
}
if (e.Key == Key.Down)
{
dataGrid.CommitEdit();
dataGrid.SelectedIndex++;
rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.SelectedItem);
if (rowContainer != null)
{
presenter = GetVisualChild <System.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.Focus();
dataGrid.CurrentItem = dataGrid.SelectedItem;
e.Handled = true;
dataGrid.UpdateLayout();
dataGrid.BeginEdit(e);
}
}
else if (e.Key == Key.Up)
{
if (dataGrid.ItemsSource != null && dataGrid.SelectedIndex == 0)
{
return;
}
dataGrid.CommitEdit();
dataGrid.SelectedIndex--;
rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.SelectedItem);
if (rowContainer != null)
{
presenter = GetVisualChild <System.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.Focus();
dataGrid.CurrentItem = dataGrid.SelectedItem;
e.Handled = true;
dataGrid.UpdateLayout();
dataGrid.BeginEdit(e);
}
}
}
}
}