[Interest] QTimer and QThread

[Tomasz Olszak]

2013/7/31 Alexander Syvak <alexander.svk at gmail.com>

> Here's the snippet below from implementation of the run method. The class
> inherits a class inheriting QThread.
> ...
>        screenshot_qtmr = new QTimer;//(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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>
>
Did you check value of state_analizer_tmr_interval?

Anyway I strongly suggest to read some docs before using QThread:
http://qt-project.org/doc/qt-5.0/qtcore/thread-basics.html

and this:
http://blog.qt.digia.com/blog/2010/06/17/youre-doing-it-wrong/

Subclassing QThread is often error prone and bad (not Qt way) design.

-- 
regards Tomasz Olszak
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