private static void HeaderTemplate_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DataGridRow dataGridRow = (DataGridRow)d;
if (dataGridRow != null)
{
if (INTERNAL_VisualTreeManager.IsElementInVisualTree(dataGridRow._datagrid))
{
if (e.NewValue != e.OldValue)
{
if (dataGridRow._headerUIElement != null && INTERNAL_VisualTreeManager.IsElementInVisualTree(dataGridRow._headerUIElement))
{
//we remove the header that was there before the new one:
dataGridRow._datagrid.RemoveElementFromGrid(dataGridRow._headerUIElement);
}
//we add the new header
DataTemplate template = (DataTemplate)e.NewValue;
if (template != null)
{
dataGridRow._headerUIElement = template.INTERNAL_InstantiateFrameworkTemplate();
Grid.SetRow(dataGridRow._headerUIElement, dataGridRow._rowIndex);
Grid.SetColumn(dataGridRow._headerUIElement, 0);
if (dataGridRow._headerUIElement is FrameworkElement)
{
((FrameworkElement)dataGridRow._headerUIElement).DataContext = dataGridRow;
}
bool isCSSGrid = Grid_InternalHelpers.isCSSGridSupported();
if (isCSSGrid)
{
if (dataGridRow._headerUIElement is Control)
{
((Control)dataGridRow._headerUIElement).BorderBrush = dataGridRow._datagrid.HorizontalGridLinesBrush;
((Control)dataGridRow._headerUIElement).BorderThickness = new Thickness(1, 0, 1, 1);
}
else if (dataGridRow._headerUIElement is Border)
{
((Border)dataGridRow._headerUIElement).BorderBrush = dataGridRow._datagrid.HorizontalGridLinesBrush;
((Border)dataGridRow._headerUIElement).BorderThickness = new Thickness(1, 0, 1, 1);
}
}
dataGridRow._datagrid.AddElementToGrid(dataGridRow._headerUIElement);
}
}
}
}
}
private void ApplyContentTemplate(DataTemplate template)
{
object newChild;
if (template == null)
{
newChild = this.Content;
}
else
{
FrameworkElement generatedContent = template.INTERNAL_InstantiateFrameworkTemplate();
if (generatedContent != null)
{
generatedContent.DataContext = this.Content;
}
newChild = generatedContent;
}
this.ChangeChild(newChild);
}
