/// <summary>
/// Coercion callback for Height property.
/// </summary>
private static object OnCoerceHeight(DependencyObject d, object baseValue)
{
var columnHeader = (DataGridColumnHeader)d;
DataGridColumn column = columnHeader.Column;
DataGrid dataGrid = null;
// Propagate style changes to any filler column headers.
if (column == null)
{
DataGridColumnHeadersPresenter presenter = columnHeader.TemplatedParent as DataGridColumnHeadersPresenter;
if (presenter != null)
{
dataGrid = presenter.ParentDataGrid;
}
}
else
{
dataGrid = column.DataGridOwner;
}
return(DataGridHelper.GetCoercedTransferPropertyValue(
columnHeader,
baseValue,
HeightProperty,
dataGrid,
DataGrid.ColumnHeaderHeightProperty));
}
/// <summary>
/// Property changed callback for VirtualizingStackPanel.IsVirtualizing property
/// </summary>
private static void OnIsVirtualizingPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DataGridColumnHeadersPresenter headersPresenter = (DataGridColumnHeadersPresenter)d;
DataGridHelper.TransferProperty(headersPresenter, VirtualizingStackPanel.IsVirtualizingProperty);
if (e.OldValue != headersPresenter.GetValue(VirtualizingStackPanel.IsVirtualizingProperty))
{
headersPresenter.InvalidateDataGridCellsPanelMeasureAndArrange();
}
}
/// <summary>
/// AutomationPeer for DataGridColumnHeadersPresenter
/// </summary>
/// <param name="owner">DataGridColumnHeadersPresenter</param>
public DataGridColumnHeadersPresenterAutomationPeer(DataGridColumnHeadersPresenter owner)
: base(owner)
{
}
