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POConnecting signals/slots on separate thread using QtConcurrent::run
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  1. POConnecting signals/slots on separate thread using QtConcurrent::run
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    copied!<p>In my application I have the following code in a dialog:</p> <pre><code>connect(drive, SIGNAL(FileProgressChanged(Progress)), SLOT(OnFileProgressChanged(Progress))); QtConcurrent::run(this, &amp;ProgressDialog::PerformOperation, Operation, *Path, OutPath, drive); </code></pre> <p>The PerformOperation function eventually calls to a function in <code>drive</code> which emits the signal <code>FileProgressChanged</code>, and my <code>OnFileProgressChanged</code> function is as follows:</p> <pre><code>void ProgressDialog::OnFileProgressChanged(Progress p) { if (ui-&gt;progressCurrent-&gt;maximum() != p.Maximium) ui-&gt;progressCurrent-&gt;setMaximum(p.Maximium); ui-&gt;progressCurrent-&gt;setValue(p.Current); if (ui-&gt;groupBoxCurrent-&gt;title().toStdString() != p.FilePath) ui-&gt;groupBoxCurrent-&gt;setTitle(QString::fromStdString(p.FilePath)); } </code></pre> <p>I was doing some reading and saw that <a href="http://doc.qt.nokia.com/4.7-snapshot/qfuture.html" rel="nofollow">QFuture</a> and <a href="http://doc.qt.nokia.com/4.7-snapshot/qfuturewatcher.html" rel="nofollow">QFutureWatcher</a> support monitoring progress values (which would work great in this situation!), but those cannot be used in conjunction with <code>QtConcurrent::run</code>.</p> <p>How would I go about connecting the signal that gets moved emitted on the separate thread to the slot on my main thread so I can monitor the progress of the function called on the emitter thread?</p> <p>*<em>Edit -- *</em> I actually found an error with my code, but it doesn't seem to have an affect. I forgot to add <code>this</code> as an argument after the signal</p> <pre><code>connect(drive, SIGNAL(FileProgressChanged(Progress)), this, SLOT(OnFileProgressChanged(Progress))); </code></pre>
 

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