private void nameColumn_Expand(object sender, MemberWrapperEventArgs e)
{
using (new LongRunningMonitor(this))
{
int index = m_properties.IndexOf(e.Wrapper);
Debug.Assert(index != -1, "index != -1");
Debug.Assert(!e.Wrapper.ValueIsNullOrUnavailable, "Trying to expand a null or unavailable value.");
CellEditorData cellData = (CellEditorData)e.Wrapper.Tag;
Debug.Assert(!cellData.IsExpanded, "Expanding an already expanded row.");
// Create a new GenericWrapper object for the expanded value and get its properties.
GenericWrapper genericWrapper = e.Wrapper.CreateWrapper();
Debug.Assert(genericWrapper != null, "CreateWrapper() returned null for the member being expanded.");
cellData.Children = genericWrapper.GetMembers();
foreach (MemberWrapper childProperty in cellData.Children)
{
childProperty.SetValueFormat(m_valueFormat);
childProperty.Tag = new CellEditorData(childProperty, cellData.Level + 1, cellData);
childProperty.ValueChanged += new EventHandler(m_handler.ItemValueChanged);
m_properties.Insert(++index, childProperty);
}
if (cellData.Children.Count == 0)
{
((DataGridExpandableColumn)sender).Invalidate();
}
else
{
((CellEditorData)cellData.Children[cellData.Children.Count - 1].Tag).IsLastInLevel = true;
}
}
}
public void DisplayValue(GenericWrapper value)
{
if (value == null)
{
throw new ArgumentNullException("value", "This editor cannot display a null value.");
}
m_wrapper = value;
DisplayValueInternal(m_wrapper.GetMembers());
}