[Qt-interest] Basic QThread question

[Phil]

On Thu, 13 May 2010 10:15:28 pm Sean Harmer wrote:
> Hi Phil,
> 
> On Thursday 13 May 2010 11:17:51 Phil wrote:
> > On Fri, 7 May 2010 06:14:02 pm Sean Harmer wrote:
> >
> Does that help? If not can you specify the desired flow of logic more
> precisely?

Yes it does Sean, however, I'm hung up on something that is probably basic 
C++ rather than a logic error. At the risk of being jumped on, here is the 
problem. After getting nowhere for most of the past two days I now realise 
that I have two instances of classA. Once this is sorted out I should be able 
to get the flow of the programme correct.

SelectItem is a slot that is called when an item is selected from a drop down 
list on the main window.

void Pest::selectItem(const QString &listItem)
{
    emit stop(); //stop the poller - this may not be necessary

    Class_A classA; //this type is defined in the Pest header file

    // Class_A's private attributes are initialised with valid data as follows
 	
    classA.getInitialValues(QString, double, double, etc);

    emit start(); //restart the poller
}

void DevicePoller::poll()
{
    // Talk to your device here. Since I do not have a device
    // I will simply generate a psuedo-random number
    int x = qrand() % 10;

    // Let the world know that we have a new value
    emit value( x );

   QStringList list = classA.getData();

  //classA is not the same instance as the classA type in the Pest class above 
which means that list does not contain valid data. How do I organise the 
same instance across two classes?

    emit dataReady(list);
}

Maybe there is a more logical method to share data between classes.

Any help provided will, as always, be greatly appreciated.

-- 
Regards,
Phil