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POQt threads - new way verification please
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  1. POQt threads - new way verification please
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    copied!<p>So new to Qt. Read the wiki and C++ Gui programming book and they say subclass QThread. Found that this is not the recommended way now.</p> <p>So I have some practice code here and I have some questions about if this is correct. So I would really appreciate someone having a look please.</p> <p>So I created a class with the QThread as a private member to use for the movetothread. When creating it, I made sure not to specify a parent. Therefore my first question is, is this ok to do?</p> <p>Second question comes from the m_thread->quit(); I found that my connect to finished wasn't being emitted until I did this. So is this the correct way? I read <a href="http://mayaposch.wordpress.com/2011/11/01/how-to-really-truly-use-qthreads-the-full-explanation/" rel="nofollow">http://mayaposch.wordpress.com/2011/11/01/how-to-really-truly-use-qthreads-the-full-explanation/</a> and saw that the connect between finished and deleteLater in the same thread but not 100% sure if this should be used with quit. </p> <p>Finally, with the talk of deleteLater, does this mean I dont need delete m_thread</p> <p>Thanks for anyones time.</p> <p>Code here. Simple QDialog with a pushbutton. <strong>worker.cpp</strong></p> <pre><code>#include "worker.h" worker::worker(QObject *parent) : QObject(parent) { stopped = false; } void worker::setupAndRun() { m_thread = new QThread(); connect(m_thread,SIGNAL(started()),this,SLOT(doWork())); connect(m_thread,SIGNAL(finished()),this,SLOT(onComplete())); connect(m_thread,SIGNAL(finished()),m_thread,SLOT(deleteLater())); this-&gt;moveToThread(m_thread); m_thread-&gt;start(); } void worker::doWork() { for(int i = 0; i &lt; 20000; i++) { if (this-&gt;stopped) break; qDebug() &lt;&lt; i &lt;&lt; " : " &lt;&lt; Q_FUNC_INFO &lt;&lt; m_thread-&gt;currentThreadId(); } // --- I think the quit calls the finished signal? m_thread-&gt;quit(); } void worker::onComplete() { qDebug() &lt;&lt; Q_FUNC_INFO &lt;&lt; "Called " &lt;&lt; m_thread-&gt;currentThreadId(); } </code></pre> <p><strong>worker.h</strong></p> <pre><code>#ifndef WORKER_H #define WORKER_H #include &lt;QObject&gt; #include &lt;QDebug&gt; #include &lt;QThread&gt; class worker : public QObject { Q_OBJECT public: explicit worker(QObject *parent = 0); void setupAndRun(); signals: public slots: void doWork(); void onComplete(); private: // --- The thread that I use to movetothread with. // Is this ok? QThread *m_thread; bool stopped; }; #endif // WORKER_H </code></pre> <p><strong>Dialog push button</strong></p> <pre><code>void Dialog::on_pushButton_clicked() { m_worker = new worker(); m_worker-&gt;setupAndRun(); } </code></pre>
 

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