SEE STACK BELOW -- PHIL, 9-30-2013, RW 6.4 Development -- Gnats 5284.

Partial Fix: Flicker aspect of: Workspace File->Reopen Model menu selection ignored (5284)
Bug Number: 5284 (partial)
Release notes (y/n): No
For Release Nums: 6.4

Gnats 5285 ("Workspace File->Reopen Model menu selection ignored") 
has not yet been solved.  It is apparently caused by a special 
mechanism within Qt to make mousing around submenus less finicky.
Google this Qt bug: "QTBUG-20094".

This commit includes the following changes:

(1) The flicker of the submenu no longer occurs.  It had been caused by 
redundantly building the "Reopen Model" (history) submenu in the "about 
to show" processing for that menu.  This is now done in ONLY the "about 
to show" processing for its parent menu (the File menu) -- and no 
longer in the "about to show" processing for the "Reopen Model" (history) 
submenu itself.  (This should also simplify further analysis of the main 
defect of this bug).

(2) A debug break point has been devised for the occurrence of this 
problem.  See this method: Workspace::aboutToShow_ReopenModelMenu() 
... Notes:

  //**************************************
  //***  Gnats 5284 Debug Diagnostics  ***
  //**************************************

  // Note [Phil, RW 6.4, Qt 4.8.5, 9-2013]: The code below provides a
  // breakpoint for the Gnats 5284 disfunction. The reshowing of the
  // "Reopen Model" submenu is a result of a fixup related to "QTBUG-20094"
  // (Google that). A call to QMenuPrivate::setCurrentAction() is resulting
  // in the submenu being shown again, that is somehow hosing the processing
  // of the clicked history submenu item.
  //
  // The output will occur under normal operation if you show the "Reopen
  // Model" submenu, hover back to the File Menu, and then back into the
  // "Reopen Model" submenu. BUT the interesting point is that we also
  // get there without doing that in the somewhat rare occurance of the
  // Gnats 5284 bug.

A stack is being aside under the bugs directory: bug5284stack.txt

riverware.exe!Workspace::aboutToShow_ReopenModelMenu()  Line 3390
riverware.exe!Workspace::qt_static_metacall(QObject* _o, QMetaObject::Call _c, int _id, void** _a)  Line 267 + 0xa bytes
QtCored4.dll!QMetaObject::activate(QObject* sender, const QMetaObject* m, int local_signal_index, void** argv)  Line 3538
QtGuid4.dll!QMenu::aboutToShow()  Line 160
QtGuid4.dll!QMenu::popup(const QPoint & p, QAction* atAction)  Line 1823
QtGuid4.dll!QMenu::internalDelayedPopup()  Line 3036
QtGuid4.dll!QMenuPrivate::popupAction(QAction* action, int delay, bool activateFirst)  Line 502 + 0xa bytes
QtGuid4.dll!QMenuPrivate::setCurrentAction(QAction* action, int popup, QMenuPrivate::SelectionReason reason, bool activateFirst)  Line 595
QtGuid4.dll!QMenuPrivate::setCurrentAction(QAction* action, int popup, QMenuPrivate::SelectionReason reason, bool activateFirst)  Line 566
QtGuid4.dll!QMenu::mousePressEvent(QMouseEvent* e)  Line 2324
QtGuid4.dll!QWidget::event(QEvent* event)  Line 8351
QtGuid4.dll!QMenu::event(QEvent* e)  Line 2460
QtGuid4.dll!QApplicationPrivate::notify_helper(QObject* receiver, QEvent* e)  Line 4542 + 0x15 bytes
QtGuid4.dll!QApplication::notify(QObject* receiver, QEvent* e)  Line 4085 + 0x51 bytes
QtCored4.dll!QCoreApplication::notifyInternal(QObject* receiver, QEvent* event)  Line 931 + 0x1d bytes
QtCored4.dll!QCoreApplication::sendSpontaneousEvent(QObject* receiver, QEvent* event)  Line 212 + 0x4c bytes
QtGuid4.dll!QApplicationPrivate::sendMouseEvent(QWidget* receiver, QMouseEvent* event, QWidget* alienWidget, QWidget* nativeWidget, QWidget** buttonDown, QPointer<QWidget> & lastMouseReceiver, bool spontaneous)  Line 3151 + 0x16 bytes
QtGuid4.dll!QETWidget::translateMouseEvent(const tagMSG & msg)  Line 3273 + 0x3f bytes
QtGuid4.dll!QtWndProc(HWND__* hwnd, unsigned int message, unsigned __int64 wParam, __int64 lParam)  Line 1687 + 0x15 bytes
user32.dll!0000000076fb9bd1() 	
[Frames below may be incorrect and/or missing, no symbols loaded for user32.dll]	
user32.dll!0000000076fb98da() 	
QtCored4.dll!QEventDispatcherWin32::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag>* flags)  Line 792
QtGuid4.dll!QGuiEventDispatcherWin32::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag>* flags)  Line 1190 + 0x27 bytes
QtCored4.dll!QEventLoop::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag>* flags)  Line 128
QtCored4.dll!QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag>* flags)  Line 178 + 0x45 bytes
QtCored4.dll!QCoreApplication::exec()  Line 1203 + 0x23 bytes
QtGuid4.dll!QApplication::exec()  Line 3804
riverware.exe!rwGUIExecute()  Line 143
riverware.exe!interactiveMode(int argc, char** argv, bool isRunAllowed)  Line 679 + 0x1a bytes
riverware.exe!main(int argc, char** argv)  Line 604 + 0x3a bytes
riverware.exe!WinMain(HINSTANCE__* instance, HINSTANCE__* prevInstance, char* __formal, int cmdShow)  Line 129 + 0x16 bytes
riverware.exe!__tmainCRTStartup()  Line 547 + 0x42 bytes	C
riverware.exe!WinMainCRTStartup()  Line 371	C
kernel32.dll!0000000076c8652d() 	
ntdll.dll!000000007721c521() 	
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