private Thumb m_rowResizerThumb; // = null
#endregion Column Resizer Code
#region Button Behavior Code
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
m_IsFromMouseButtonDown = true;
if (this.CaptureMouse())
{
this.SetIsPressed(true);
e.Handled = true;
FrameworkElement rowItemContainer = this.DataContext as FrameworkElement;
if (rowItemContainer != null)
{
DataGridContext dataGridContext = DataGridControl.GetDataGridContext(rowItemContainer);
if (dataGridContext != null)
{
DataGridControl dataGridControl = dataGridContext.DataGridControl;
// Ensure to push the RowSelector source to the SelectionChangeManager to be able to
// detect that a RowSelector was used to perform a selection of Row(s) and/or Cell(s)
using (dataGridControl.SelectionChangerManager.PushUpdateSelectionSource(SelectionManager.UpdateSelectionSource.RowSelector))
{
if (dataGridControl.SetFocusHelper(rowItemContainer, dataGridContext.CurrentColumn, true, true, true))
{
// Keep a reference to the mouse position so we can calculate when a drag operation is actually started.
dataGridControl.InitializeDragPostion(e);
}
if (dataGridControl.NavigationBehavior == NavigationBehavior.RowOrCell)
{
try
{
dataGridContext.SetCurrentColumnCore(null, false, false);
}
catch (DataGridException)
{
// We swallow the exception if it occurs because of a validation error or Cell was read-only or any other GridException.
}
}
}
}
}
}
base.OnMouseLeftButtonDown(e);
m_IsFromMouseButtonDown = false;
}
