/// <summary>
/// Shows popup, filters assist list based on the last word. Place popup just at the current CaretPosition within RichTextBox
/// </summary>
/// <param name="lastWord"></param>
private void ShowPopup(string lastWord)
{
m_assistListPopup.DataContext = ContentAssistTriggers.FindAll(item => item.StartsWith(lastWord, StringComparison.CurrentCultureIgnoreCase));
m_assistListPopup.PlacementTarget = this;
m_assistListPopup.PlacementRectangle = CaretPosition.GetCharacterRect(LogicalDirection.Forward);
m_assistListPopup.IsOpen = true;
}
void MoveUpByLineExecuted(object target, ExecutedRoutedEventArgs e)
{
TextPointer tp = CaretPosition;
Rect r = CaretPosition.GetCharacterRect(LogicalDirection.Forward);
CommandBindings.Remove(cbup);
EditingCommands.MoveUpByLine.Execute(null, this);
CommandBindings.Add(cbup);
if (tp.CompareTo(CaretPosition) == 0)
{
MoveToLiveEventArgs l = new MoveToLiveEventArgs(MyEdit.MoveToPrevLine, r);
RaiseEvent(l);
}
}