/// <summary>
/// Notification for column header-related DependencyProperty changes from the grid or from columns.
/// </summary>
internal void NotifyPropertyChanged(DependencyObject d, string propertyName, DependencyPropertyChangedEventArgs e, NotificationTarget target)
{
DataGridColumn column = d as DataGridColumn;
if (DataGridHelper.ShouldNotifyColumnHeadersPresenter(target))
{
if (e.Property == DataGridColumn.WidthProperty ||
e.Property == DataGridColumn.DisplayIndexProperty)
{
if (column.IsVisible)
{
InvalidateDataGridCellsPanelMeasureAndArrange();
}
}
else if (e.Property == DataGrid.FrozenColumnCountProperty ||
e.Property == DataGridColumn.VisibilityProperty ||
e.Property == DataGrid.CellsPanelHorizontalOffsetProperty ||
string.Compare(propertyName, "ViewportWidth", StringComparison.Ordinal) == 0 ||
string.Compare(propertyName, "DelayedColumnWidthComputation", StringComparison.Ordinal) == 0)
{
InvalidateDataGridCellsPanelMeasureAndArrange();
}
else if (e.Property == DataGrid.HorizontalScrollOffsetProperty)
{
InvalidateArrange();
InvalidateDataGridCellsPanelMeasureAndArrange();
}
else if (string.Compare(propertyName, "RealizedColumnsBlockListForNonVirtualizedRows", StringComparison.Ordinal) == 0)
{
InvalidateDataGridCellsPanelMeasureAndArrange(/* withColumnVirtualization */ false);
}
else if (string.Compare(propertyName, "RealizedColumnsBlockListForVirtualizedRows", StringComparison.Ordinal) == 0)
{
InvalidateDataGridCellsPanelMeasureAndArrange(/* withColumnVirtualization */ true);
}
else if (e.Property == DataGrid.CellsPanelActualWidthProperty)
{
InvalidateArrange();
}
else if (e.Property == DataGrid.EnableColumnVirtualizationProperty)
{
DataGridHelper.TransferProperty(this, VirtualizingStackPanel.IsVirtualizingProperty);
}
}
if (DataGridHelper.ShouldNotifyColumnHeaders(target))
{
if (e.Property == DataGridColumn.HeaderProperty)
{
if (HeaderCollection != null)
{
HeaderCollection.NotifyHeaderPropertyChanged(column, e);
}
}
else
{
// Notify the DataGridColumnHeader objects about property changes
ContainerTracking <DataGridColumnHeader> tracker = _headerTrackingRoot;
while (tracker != null)
{
tracker.Container.NotifyPropertyChanged(d, e);
tracker = tracker.Next;
}
// Handle Style & Height change notification for PART_FillerColumnHeader.
if (d is DataGrid &&
(e.Property == DataGrid.ColumnHeaderStyleProperty || e.Property == DataGrid.ColumnHeaderHeightProperty))
{
DataGridColumnHeader fillerColumnHeader = GetTemplateChild(ElementFillerColumnHeader) as DataGridColumnHeader;
if (fillerColumnHeader != null)
{
fillerColumnHeader.NotifyPropertyChanged(d, e);
}
}
}
}
}
