[Interest] Never ending thread: blocking GUI

Lincoln Ramsay a1291762 at gmail.com
Tue Oct 16 15:34:27 CEST 2012

On 16/10/12 11:15 PM, Sensei wrote:
> Once in a while, when the GUI needs it, it will "wake the thread up",
> and run a method of my QThread subclass, in my case, a "find in files"
> or "rename all files", or any other method.
> I thought I could simply make run() be an infinite loop, sleeping for a
> long period (one day).

You're doing it wrong.

You want an async QObject-based interface (call in via slot, answer via 

> class ScanFiles : public QObject
> {
> public:
>       ScanFiles(QObject *parent = 0) : QObject(parent) {};
> signals:
> QString searchResult();
> public slots:
>       // Here I will place the methods that should be run by the thread
>       void search(const QStringList &files);
> };

Then you just put that object on the thread, connect up your signals and 
slots and you're good to go.

QThread *thread = new QThread;
ScanFiles *sf = new ScanFiles;
connect(..., sf, SLOT(search(QStringList)));
connect(sf, SIGNAL(searchResult()), ...);


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