Add ShuttleGui functions to make simple book controls...

... analogous to StartNotebook() and EndNotebook()

This will be needed to rewrite export dialogs

src/ShuttleGui.cpp

@@ -107,6 +107,7 @@ for registering for changes.
 #include <wx/grid.h>
 #include <wx/listctrl.h>
 #include <wx/notebook.h>
+#include <wx/simplebook.h>
 #include <wx/treectrl.h>
 #include <wx/spinctrl.h>
 #include <wx/stattext.h>
@@ -977,12 +978,33 @@ void ShuttleGuiBase::EndNotebook()
 }
 
 
+wxSimplebook * ShuttleGuiBase::StartSimplebook()
+{
+   UseUpId();
+   if( mShuttleMode != eIsCreating )
+      return wxDynamicCast(wxWindow::FindWindowById( miId, mpDlg), wxSimplebook);
+   wxSimplebook * pNotebook;
+   mpWind = pNotebook = safenew wxSimplebook(GetParent(),
+      miId, wxDefaultPosition, wxDefaultSize, GetStyle( 0 ));
+   SetProportions( 1 );
+   UpdateSizers();
+   mpParent = pNotebook;
+   return pNotebook;
+}
+
+void ShuttleGuiBase::EndSimplebook()
+{
+   //PopSizer();
+   mpParent = mpParent->GetParent();
+}
+
+
 wxNotebookPage * ShuttleGuiBase::StartNotebookPage( const wxString & Name )
 {
    if( mShuttleMode != eIsCreating )
       return NULL;
 //      return wxDynamicCast(wxWindow::FindWindowById( miId, mpDlg), wx);
-   wxNotebook * pNotebook = (wxNotebook*)mpParent;
+   auto pNotebook = static_cast< wxBookCtrlBase* >( mpParent );
    wxNotebookPage * pPage = safenew wxPanelWrapper(GetParent());
    pPage->SetName(Name);
 
@@ -1004,7 +1026,7 @@ void ShuttleGuiBase::StartNotebookPage( const wxString & Name, wxNotebookPage *
    if( mShuttleMode != eIsCreating )
       return;
 //      return wxDynamicCast(wxWindow::FindWindowById( miId, mpDlg), wx);
-   wxNotebook * pNotebook = (wxNotebook*)mpParent;
+   auto pNotebook = static_cast< wxBookCtrlBase* >( mpParent );
 //   wxNotebookPage * pPage = safenew wxPanelWrapper(GetParent());
    pPage->Create( mpParent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, wxT("panel"));
    pPage->SetName(Name);

src/ShuttleGui.h

@@ -58,6 +58,7 @@ class wxTreeCtrl;
 class wxTextCtrl;
 class wxSlider;
 class wxNotebook;
+class wxSimplebook;
 typedef wxWindow wxNotebookPage;  // so far, any window can be a page
 class wxButton;
 class wxBitmapButton;
@@ -360,11 +361,16 @@ public:
    wxNotebook * StartNotebook();
    void EndNotebook();
 
+   wxSimplebook * StartSimplebook();
+   void EndSimplebook();
+
+   // Use within any kind of book control:
    // IDs of notebook pages cannot be chosen by the caller
    wxNotebookPage * StartNotebookPage( const wxString & Name );
    void StartNotebookPage( const wxString & Name, wxNotebookPage * pPage );
 
    void EndNotebookPage();
+
    wxPanel * StartInvisiblePanel();
    void EndInvisiblePanel();