/// <summary>
/// Raises the System.Windows.Controls.DataGrid.SelectedCellsChanged event.
/// </summary>
/// <param name="e">The data for the event.</param>
protected override void OnSelectedCellsChanged(SelectedCellsChangedEventArgs e)
{
// base.OnSelectedCellsChanged(e);
if (e.AddedCells != null && e.AddedCells.Count == 1)
{
DataGridCellInfo cellInfo = e.AddedCells[0];
if (!cellInfo.IsValid)
{
return;
}
FrameworkElement cellContent = cellInfo.Column.GetCellContent(cellInfo.Item);
if (cellContent == null)
{
return;
}
DataGridCell dataGridCell = (DataGridCell)cellContent.Parent;
if (dataGridCell == null)
{
return;
}
Point relativePoint = dataGridCell.TransformToAncestor(this).Transform(new Point(0, 0));
Point startPosition = new Point(relativePoint.X - 3, relativePoint.Y - 3);
Point endPosition = new Point(relativePoint.X + dataGridCell.ActualWidth, relativePoint.Y + dataGridCell.ActualHeight);
UpdateSelectionRectangle(startPosition, endPosition);
}
}
