Gnats 4742 (Rusty, 6-2009): Long time to OPEN an SCT

See stack below.  In a problem scenario -- with models similar to those 
cited in the bug report, SctView::refreshAllShowDetails (bool redraw=true) 
is iterating through 12139 rows -- to appropriately hide or show each row.  

In each such call, Q3Header::calculatePositions is also doing a similar 
iteration, from the first row to the current row.  And there don't seem to 
be any conditions in any of the intervening methods which cause these low-
level computations to be skipped.

Unfortunately, Q3Table does not provide any method which will show or hide 
a SET of rows in a single operation.

-------------------------------------------------------
STACK at an arbitrary manual break during a long delay:
-------------------------------------------------------

> Qt3Supportd4.dll! Q3Header::calculatePositions(bool onlyVisible=false, int 
  Qt3Supportd4.dll! Q3Header::sectionPos(int section=7054)  
  Qt3Supportd4.dll! Q3TableHeader::sectionPos(int section=7054)  
  Qt3Supportd4.dll! Q3Table::rowPos(int row=7054)  
  Qt3Supportd4.dll! Q3Table::rowHeightChanged(int row=7054)  
  Qt3Supportd4.dll! Q3Table::hideRow(int row=7054)  
> riverware.exe! SctView::refreshAllShowDetails(bool redraw=true)  
  riverware.exe! SctView::adjustRowHeights()  
  riverware.exe! SctViewAggTHorz::configureQTables()  
  riverware.exe! SctViewAggTHorz::reConfigViewSpecific()  
  riverware.exe! SctView::reConfigView(SctConfig * sctConfig=0x0b004028, Sc
  riverware.exe! SctDialog::reConfigAllViews(SctRescrollType scrollType=SCT_
  riverware.exe! SctDialog::fullRecomp(SctRescrollType scrollType=SCT_RESCRO
  riverware.exe! SctDialog::sctModelData_ModelLoaded()  
  riverware.exe! SctModelData::runInfoCallbackHandler(CallbackType cbType=R
  riverware.exe! MethodCb<SctModelData>::invoke(CallbackType type=RI_STATE_C
  riverware.exe! Root::callCallbacks(CallbackType type=RI_STATE_CHANGED, Cal
  riverware.exe! RunInfo::setState(RunState newState=LOADED, bool doCallback
  riverware.exe! RunInfo::loadEnd()  
  riverware.exe! SimWorkspace::doneLoading(bool status=false, QString & erro
  riverware.exe! SimWorkspace::load(cwfpointer & fp={...}, QString & error={
  riverware.exe! SimWorkspace::loadModelFile(const rwFile & fileObj={...}, c
  riverware.exe! LoadFileObj<SimWorkspace>::operator()(const rwFile & fileOb
  riverware.exe! loadFile<guiLoadFileCompare,LoadFileObj<SimWorkspace>,guiLo
  riverware.exe! loadModelFile(const char * path=0x03a39fd0)  
  riverware.exe! LoadSaveMgr::doLoadModelFile(int __formal=0, const QString 
  riverware.exe! LoadSaveMgr::loadSaveCmd(int cmd=0, const QString * inPath=
  riverware.exe! LoadSaveMgr::recentFileMenuItemTriggered(QAction * menuItem
  riverware.exe! LoadSaveMgr::qt_metacall(QMetaObject::Call _c=InvokeMetaMet
  QtCored4.dll! QMetaObject::metacall(QObject * object=0x051a2498, QMetaObje
  QtCored4.dll! QMetaObject::activate(QObject * sender=0x046aecd0, const QMe
  QtGuid4.dll! QMenu::triggered(QAction * _t1=0x0a0c94b8)  
  QtGuid4.dll! QMenuPrivate::_q_actionTriggered()  
  QtGuid4.dll! QMenu::qt_metacall(QMetaObject::Call _c=InvokeMetaMethod, int
  QtCored4.dll! QMetaObject::metacall(QObject * object=0x046aecd0, QMetaObje
  QtCored4.dll! QMetaObject::activate(QObject * sender=0x0a0c94b8, const QMe
  QtGuid4.dll! QAction::triggered(bool _t1=false)  
  QtGuid4.dll! QAction::activate(QAction::ActionEvent event=Trigger)  
  QtGuid4.dll! QMenuPrivate::activateCausedStack(const QList<QPointer<QWidge
  QtGuid4.dll! QMenuPrivate::activateAction(QAction * action=0x0a0c94b8, QAc
  QtGuid4.dll! QMenu::mouseReleaseEvent(QMouseEvent * e=0x0012d640)  
  QtGuid4.dll! QWidget::event(QEvent * event=0x0012d640)  
  QtGuid4.dll! QMenu::event(QEvent * e=0x0012d640)  
  QtGuid4.dll! QApplicationPrivate::notify_helper(QObject * receiver=0x046ae
  QtGuid4.dll! QApplication::notify(QObject * receiver=0x046aecd0, QEvent * 
  QtCored4.dll! QCoreApplication::notifyInternal(QObject * receiver=0x046aec
  QtCored4.dll! QCoreApplication::sendSpontaneousEvent(QObject * receiver=0x
  QtGuid4.dll! QApplicationPrivate::sendMouseEvent(QWidget * receiver=0x046a
  QtGuid4.dll! QETWidget::translateMouseEvent(const tagMSG & msg={...})  Lin
  QtGuid4.dll! QtWndProc(HWND__ * hwnd=0x000409a4, unsigned int message=514,
  user32.dll! 7e418734() 
   
  [Frames below may be incorrect and/or missing, no symbols loaded for 
    user32.dll] 

  user32.dll! 7e418816()  
  user32.dll! 7e4189cd()  
  user32.dll! 7e418a10()  
  QtCored4.dll! QEventDispatcherWin32::processEvents(QFlags<enum QEventLoop
  QtGuid4.dll! QGuiEventDispatcherWin32::processEvents(QFlags<enum QEventLo
  QtCored4.dll! QEventLoop::processEvents(QFlags<enum QEventLoop::ProcessEv
  QtCored4.dll! QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag>
  QtCored4.dll! QCoreApplication::exec()  
  QtGuid4.dll! QApplication::exec()  
  riverware.exe! rwGUIExecute()  
  riverware.exe! interactiveMode(int argc=1, char * * argv=0x0369c750, bool
  riverware.exe! main(int argc=1, char * * argv=0x0369c750)  
  riverware.exe! WinMain(HINSTANCE__ * instance=0x00400000, HINSTANCE__ * p
  riverware.exe! __tmainCRTStartup()  
  riverware.exe! WinMainCRTStartup()  
  kernel32.dll! 7c817077()  

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