Please can some-one suggest on this question..? I have to send data from my TX thread to mainwindow using class derived from QEvent.
I want my RX thread to throw an event whenever some data is received so hat i can display that data in the Mainwindow.
I start a main thread when button start is pressed. I save the pointer to my mainwindow inside the object of main thread. I will use this pointer to post events to the mainwindow object.
When first time i enter the Qthread function dowork_rx(). Event is thrown & i am able to catch it in customEvent() handler. But when dowork_rx() while loop starts when i throws the event it does not trigger the customEvent() function.
Please suggest how to resolve this problem.
My qevent class :---
//String event derived class
template <typename T> class StringEvent : public QEvent
{
QString m_str;
public:
explicit StringEvent(const QString val) : QEvent(staticType()), m_str(val)
{
}
void setvalue(QString val)
{
m_str = val;
}
QString value() const
{
return m_str;
}
static QEvent::Type staticType()
{
static int type = QEvent::registerEventType();
return static_cast<QEvent::Type>(type);
/*
static int type;
if(type == 0)
{
type = QEvent::registerEventType();
}
return static_cast<QEvent::Type>(type);*/
}
static bool is(const QEvent * ev)
{
return ev->type() == staticType();
}
};
class UpdateEvent : public StringEvent<UpdateEvent>
{
public:
explicit UpdateEvent(QString val): StringEvent(val)
{
//qDebug() << "hello";
}
};
class ClearEvent : public StringEvent<ClearEvent>
{
public:
explicit ClearEvent(QString val): StringEvent(val)
{
}
};
Dowork function of the thread :----
// Common slot for the rx - thread
void RxThreadObject::dowork_rx()
{
int i =0;
qDebug() << "\nrx start \n";
myUpdateEvent_rx = new UpdateEvent("UpdateEventObject - dowork_rx");
//myUpdateEvent_rx->setvalue("first");
QCoreApplication::postEvent(m_pMainThreadObj->ptrmainwindow, myUpdateEvent_rx);
qDebug() << "\nrx throw event - done \n";
while(!m_bQuitRx)
{
SleepTimerDelay::sleep(2);
if(i==0){
//qDebug() << "\nrx throw event - done 11 \n";
myUpdateEvent_rx = new UpdateEvent("first");
myUpdateEvent_rx->setvalue("first");
QCoreApplication::postEvent(m_pMainThreadObj->ptrmainwindow, myUpdateEvent_rx);
i++;
}else{
//qDebug() << "\nrx throw event - done 22 \n";
myUpdateEvent_rx = new UpdateEvent("second");
myUpdateEvent_rx->setvalue("second");
QCoreApplication::postEvent(m_pMainThreadObj->ptrmainwindow, myUpdateEvent_rx);
i=0;
}
}
qDebug() << "\nrx end \n";
}
Event handler :----
/*!
** Custom event handler
*/
void MainWindow::customEvent(QEvent *event)
{
qDebug() << "oo customEvent";
if (UpdateEvent::is(event)) {
UpdateEvent *tempUpdateEvent = static_cast<UpdateEvent *>(event);
qDebug() << tempUpdateEvent->value();
}
else if (ClearEvent::is(event)) {
ClearEvent *tempClearEvent = static_cast<ClearEvent *>(event);
qDebug() << tempClearEvent->value();
}
}
/*!
** event filter handler
*/
bool MainWindow::eventFilter(QObject *obj, QEvent *event)
{
qDebug() << "oo eventFilter";
if (UpdateEvent::is(event)) {
UpdateEvent *tempUpdateEvent = static_cast<UpdateEvent *>(event);
qDebug() << tempUpdateEvent->value();
}
else if (ClearEvent::is(event)) {
ClearEvent *tempClearEvent = static_cast<ClearEvent *>(event);
qDebug() << tempClearEvent->value();
}
return true;
}
