[Qt-interest] Basic QThread question

[Eirik Ulvik]

I had trouble using timers in threads before and used this info:
http://lists.trolltech.com/qt-interest/2007-09/thread00073-0.html.
Basically this would translate to:

>> class DevicePoller : public QObject
>> {
>> Q_OBJECT
>> public:
>>     DevicePoller( QObject* parent = 0 )
>>
>>     : QObject( parent ), m_timer( new QTimer( this ) )
>>
>>     {
          connect(this, SIGNAL(started()), this, SLOT(handleStarted()));
>>         connect( m_timer, SIGNAL( timeout() ), SLOT( poll() ) );
>>         m_timer->start( 1000 );
>>     }
>>
>> public slots:
>>     void poll()
>>     {
>>         // Talk to your device here
>>         ...
>>         int x = ...
>>
>>         // Let the world know the value retrieved
>>         emit value( x );
>>     }
>>
private slots:
     void handleStarted()
     {
        moveToThread(this);
     }

>> signals:
>>     void value( int x );
>>
>> private:
>>     QTimer* m_timer;
>> };
>>
>>
>> class PollingThread : public QThread
>> {
>> Q_OBJECT
>> public:
>>     PollingThread( QObject* parent = 0 )
>>
>>     : QThread( parent )
>>
>>     {}
>>
>>     DevicePoller* poller() const { return m_poller; }
>>
>> protected:
>>     virtual void run()
>>     {
>>         // Create an object to do the polling
>>         m_poller = new DevicePoller;
>>
>>         // Start the event loop
>>         exec();
>>
>>         // Clean up
>>         delete m_poller;
>>         m_poller = 0;
>>     }
>>
>> private:
>>     DevicePoller* m_poller;
>> };
>>

Regards,
Eirik

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