QThread blocks gui

[skoegl]

class Install : public QThread,
        public paludis::InstallTask
    {
        Q_OBJECT
        public:
            Install(QObject* pobj,
                    DatabaseView* main,
                    const paludis::DepListOptions & options,
                    paludis::tr1::shared_ptr<const paludis::DestinationsSet> destinations);
            ~Install() {}
...
 
};

class Install : public QThread,
        public paludis::InstallTask
    {
        Q_OBJECT
        public:
            Install(QObject* pobj,
                    DatabaseView* main,
                    const paludis::DepListOptions & options,
                    paludis::tr1::shared_ptr<const paludis::DestinationsSet> destinations);
            ~Install() {}
...

};

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I have to be more precise the next time, sorry. I'm using start() for starting the thread. The work is done in Install::run()->execute().
The problem is, I have to pass a lot of text to a output window like a terminal like the gcc output and a lot more gentoo specific.

[jacek]

The problem is, I have to pass a lot of text to a output window like a terminal like the gcc output and a lot more gentoo specific.

Accessing a widget from a non-GUI thread is a Really Bad Thing(tm). Make sure you use queued connections instead.

[skoegl]

@jacek:

Ok, thanks. I've switched to SIGNAL/SLOT "message passing", and checked it into svn.

@all:

I tried with and without sending message (QString) to the main thread. The gui is still blocked while the thread is running. After the job is finished, the Gui is again responsively.

How can I determine, what's the reason of this block?

[jacek]

How can I determine, what's the reason of this block?

Try setting a breakpoint on QThread::start() to see whether you really start the thread.