// calculation thread function
void CalcPage::DoCalculation(void)
{
	// gets the status bar
	StatusBar &sb = ((Lamell *)(GetMainWindow()))->GetStatusBar();
	{
		GuiLock __;
		sb.Set("Calcolo in corso");
	}
	calcAborted = !Calculate();
	{
		GuiLock __;
		if(calcAborted)
			sb.Set("Errore");
		else
			sb.Set("Pronto");
	}
}

// modify handler -- triggers page calculation
// (triggered by button)
void CalcPage::ModifyCb(void)
{
	PostCallback(THISBACK(CalcAgainCb));
}

// callback in case modify handler is re-entered when
// calc thread still working
void CalcPage::CalcAgainCb(void)
{
	if(!calcThread.IsOpen())
		// restarts the calculation if thread not already working
		calcThread.Run(THISBACK(DoCalculation));
		// otherwise repost calculation for later
	else
		PostCallback(THISBACK(CalcAgainCb));
}