private void SetActiveDocumentPane() { DockPane value = null; if (ActivePane != null && ActivePane.DockState == DockState.Document) { value = ActivePane; } if (value == null) { if (ActiveDocumentPane == null) { value = DockWindows[DockState.Document].DefaultPane; } else if (ActiveDocumentPane.DockPanel != this || ActiveDocumentPane.DockState != DockState.Document) { value = DockWindows[DockState.Document].DefaultPane; } else { value = m_activeDocumentPane; } } if (m_activeDocumentPane == value) { return; } if (m_activeDocumentPane != null) { m_activeDocumentPane.SetIsActiveDocumentPane(false); } m_activeDocumentPane = value; if (m_activeDocumentPane != null) { m_activeDocumentPane.SetIsActiveDocumentPane(true); } }