static Microsoft.Windows.Controls.DataGridCell TryToFindGridCell(Microsoft.Windows.Controls.DataGrid grid, Microsoft.Windows.Controls.DataGridCellInfo cellInfo)
{
Microsoft.Windows.Controls.DataGridCell result = null;
Microsoft.Windows.Controls.DataGridRow row = null;
try
{
grid.ScrollIntoView(cellInfo.Item);
grid.UpdateLayout();
row = (Microsoft.Windows.Controls.DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(cellInfo.Item);
if (row != null)
{
int columnIndex = grid.Columns.IndexOf(cellInfo.Column);
if (columnIndex > -1)
{
Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(row);
result = presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex) as Microsoft.Windows.Controls.DataGridCell;
}
}
}
catch (Exception generalException)
{
string error = generalException.Message;
result = null;
}
return(result);
}
private void ToolkitDataGrid_PreviewKeyDown(object sender, KeyEventArgs e)
{
Microsoft.Windows.Controls.DataGrid dataGrid = sender as Microsoft.Windows.Controls.DataGrid;
if (dataGrid == null)
{
return;
}
if (e.Key == Key.Enter || e.Key == Key.Tab || 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 || e.Key == Key.Tab)
{
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
request.Wrapped = true;
Microsoft.Windows.Controls.DataGridRow rowContainer = (Microsoft.Windows.Controls.DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.CurrentItem);
if (rowContainer != null)
{
int columnIndex = dataGrid.Columns.IndexOf(dataGrid.CurrentColumn);
Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
dataGrid.CommitEdit();
Microsoft.Windows.Controls.DataGridCell cell = (Microsoft.Windows.Controls.DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.MoveFocus(request);
dataGrid.SelectedItem = dataGrid.CurrentItem;
e.Handled = true;
dataGrid.UpdateLayout();
try
{
dataGrid.BeginEdit(e);
}
catch (System.InvalidOperationException)
{
//Ignore error if it is 'Recursive call to Automation Peer API is not valid.'
}
}
}
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);
Microsoft.Windows.Controls.DataGridRow rowContainer = (Microsoft.Windows.Controls.DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.CurrentItem);
if (rowContainer != null)
{
Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
Microsoft.Windows.Controls.DataGridCell currentcell = (Microsoft.Windows.Controls.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 = (Microsoft.Windows.Controls.DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.SelectedItem);
if (rowContainer != null)
{
presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
Microsoft.Windows.Controls.DataGridCell cell = (Microsoft.Windows.Controls.DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.Focus();
dataGrid.CurrentItem = dataGrid.SelectedItem;
e.Handled = true;
dataGrid.UpdateLayout();
try
{
dataGrid.BeginEdit(e);
}
catch (System.InvalidOperationException)
{
//Ignore error if it is 'Recursive call to Automation Peer API is not valid.'
}
}
}
else if (e.Key == Key.Up)
{
if (dataGrid.ItemsSource != null && dataGrid.SelectedIndex == 0)
{
return;
}
dataGrid.CommitEdit();
dataGrid.SelectedIndex--;
rowContainer = (Microsoft.Windows.Controls.DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(dataGrid.SelectedItem);
if (rowContainer != null)
{
presenter = GetVisualChild <Microsoft.Windows.Controls.Primitives.DataGridCellsPresenter>(rowContainer);
Microsoft.Windows.Controls.DataGridCell cell = (Microsoft.Windows.Controls.DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell.Focus();
dataGrid.CurrentItem = dataGrid.SelectedItem;
e.Handled = true;
dataGrid.UpdateLayout();
try
{
dataGrid.BeginEdit(e);
}
catch (System.InvalidOperationException)
{
//Ignore error if it is 'Recursive call to Automation Peer API is not valid.'
}
}
}
}
}
}
