On 31.07.2013 17:01, Alexander Syvak wrote:
Here's the snippet below from implementation of the run method. The
class inherits a class inheriting QThread.
...
screenshot_qtmr=newQTimer;//(this);
screenshot_qtmr->moveToThread(this);
qDebug() << connect(screenshot_qtmr, SIGNAL(timeout()), this,
SLOT(on_screenshot_timeout()));
qDebug() << connect(this, SIGNAL(kill_tmr()), screenshot_qtmr,
SLOT(stop()));
screenshot_qtmr->start(freq*1000);
anal_qmr = new QTimer;//(this);
anal_qmr->moveToThread(this);
qDebug() << connect(anal_qmr, SIGNAL(timeout()),
SLOT(on_analize_timeout()));
qDebug() << connect(this, SIGNAL(kill_tmr()), anal_qmr, SLOT(stop()));
anal_qmr->start(state_analizer_tmr_interval);
if ( !state_analizer_tmr_id ) return;
exec();
while ( !stop );
}
Here's an ouput
run() "./13_7_31_10_49_2_974"
"./13_7_31_10_49_2_974 exists"
"./13_7_31_10_49_2_974 has 'write' permission for other"
"./13_7_31_10_49_2_974/S0 directory was created"
true
true
true
true
run() "./13_7_31_10_49_2_974"
"./13_7_31_10_49_2_974 exists"
"./13_7_31_10_49_2_974 has 'write' permission for other"
"./13_7_31_10_49_2_974/S1 directory was created"
true
true
true
true
It never enters those method specified on timeout(). Why?
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1) From QTimer documentation:
*/Qt uses the timer's/**/thread affinity
<https://qt-project.org/doc/qt-4.8/qobject.html#thread>/**/to
determine which thread will emit the/**/timeout()
<https://qt-project.org/doc/qt-4.8/qtimer.html#timeout>/**/signal.
Because of this, you must start and stop the timer in its thread; it
is not possible to start a timer from another thread./*
But you starts timer from source thread. Timer will not starts.
You should use something like:
screenshot_qtmr=newQTimer;//(this);
screenshot_qtmr->setInterval(freq*1000);
screenshot_qtmr->moveToThread(this);
qDebug() << connect(this, SIGNAL(started()),screenshot_qtmr, SLOT(start()));
qDebug() << connect(screenshot_qtmr, SIGNAL(timeout()), this,
SLOT(on_screenshot_timeout()));
qDebug() << connect(this, SIGNAL(kill_tmr()), screenshot_qtmr,
SLOT(stop()));
//screenshot_qtmr->start(freq*1000); // do not do it
2) In you sample on_screenshot_timeout will be executed in main thread,
maybe you need change
connect(screenshot_qtmr, SIGNAL(timeout()), this,
SLOT(on_screenshot_timeout()));
to
connect(screenshot_qtmr, SIGNAL(timeout()), this,
SLOT(on_screenshot_timeout()), Qt::DirectConnection);
?
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