private void OnCanUserResizeChanged()
{
Debug.Assert(Column != null, "column can't be null if we got a notification for this property change");
DataGrid dataGrid = Column.DataGridOwner;
if (dataGrid != null)
{
DataGridColumnHeader nextColumnHeader = dataGrid.ColumnHeaderFromDisplayIndex(DisplayIndex + 1);
if (nextColumnHeader != null)
{
nextColumnHeader.SetLeftGripperVisibility(Column.CanUserResize);
}
SetRightGripperVisibility();
}
}
private void SetNextHeaderLeftGripperVisibility(bool canUserResize)
{
DataGrid dataGrid = Column.DataGridOwner;
int columnCount = dataGrid.Columns.Count;
for (int index = DisplayIndex + 1; index < columnCount; index++)
{
if (dataGrid.ColumnFromDisplayIndex(index).IsVisible)
{
DataGridColumnHeader nextHeader = dataGrid.ColumnHeaderFromDisplayIndex(index);
if (nextHeader != null)
{
nextHeader.SetLeftGripperVisibility(canUserResize);
}
break;
}
}
}
/// <summary>
/// Property changed call back for DisplayIndex property.
/// Sets the visibility of resize grippers accordingly
/// </summary>
/// <param name="d"></param>
/// <param name="e"></param>
private static void OnDisplayIndexChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DataGridColumnHeader header = (DataGridColumnHeader)d;
DataGridColumn column = header.Column;
if (column != null)
{
DataGrid dataGrid = column.DataGridOwner;
if (dataGrid != null)
{
header.SetLeftGripperVisibility();
DataGridColumnHeader nextColumnHeader = dataGrid.ColumnHeaderFromDisplayIndex(header.DisplayIndex + 1);
if (nextColumnHeader != null)
{
nextColumnHeader.SetLeftGripperVisibility(column.CanUserResize);
}
}
}
}
