On Wed, Apr 3, 2013 at 3:44 AM, Sensei <[email protected]> wrote: > Dear all, > > I am using multiple threads in my application, and now I am wondering if > I am doing something bad. > > My application has a 'worker' thread that builds a tree with > QTreeWidgetItems, setting QIcons for them. > > Reading around, I found contradictory information about QPixmap (a > warning that triggered my question here) and non-GUI threads. > > Is this code safe to execute in a thread? The underlying graphic system > *IS* initialized and running at the time the thread starts, this is > something I can guarantee. > > > item = new QTreeWidgetItem(QStringList(params)); > item->setIcon(0, QIcon(icons[i])); // WARNING !!! > item->setData(1, 0, QVariant(file)); > item->setData(2, 0, QVariant(idx)); >
no. You can't create widgets or QPixmap in other threads. > > > The warning is "QPixmap: It is not safe to use pixmaps outside the GUI > thread". > Correct. > > Also, besides QIcons, am I heading for disaster in creating widgets as I > am doing in a separate threads? > Yes.
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