void NLSimpleGuiWindow::zoomModelPreview( double factor )
{
TQtWidget *qtWidget = ui->m_modelDisplayWidget;
QScrollArea *scrollArea = ui->m_modelDisplayScrollArea;
TCanvas *can = qtWidget->GetCanvas();
can->SetEditable( kTRUE );
can->Update(); //need this or else TCanvas won't have updated axis range
double xmin, xmax, ymin, ymax;
can->GetRangeAxis( xmin, ymin, xmax, ymax );
const double nMinutes = xmax - xmin;
if( nMinutes > 1 )
{
int canvasWidth = qtWidget->width();
int scrollAreaWidth = scrollArea->width();
int newWidth = factor * canvasWidth;
newWidth = max(newWidth, scrollAreaWidth);
newWidth = min(newWidth, 5*scrollAreaWidth);
if( newWidth == scrollAreaWidth )
scrollArea->setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
else scrollArea->setHorizontalScrollBarPolicy ( Qt::ScrollBarAsNeeded );
int h = scrollArea->height() - scrollArea->verticalScrollBar()->height();
qtWidget->setMinimumSize( newWidth, h );
qtWidget->setMaximumSize( newWidth, h );
}//if( nMinutes > 1 )
can->Update();
can->SetEditable( kFALSE );
}//void NLSimpleGuiWindow::zoomModelPreview( double factor )
