[Qt-interest] QWidget: Must construct a QApplication before a QPaintDevice

[Yifei Li]

Hi all,

I got this error when running an application (once working with Qt-4.6.2 on Snow Leopard) after I switch to Qt-4.8.0 on Lion.

The error occurs when I construct a QWidget in a plugin loaded by the main application. My application works as follows:

void main()
{
     QApplication app();

    // in Core's constructor, plugins are loaded using QPluginLoader
     Core core;        
   
    return app.exec();
}

Any idea how to solve this? Thanks

Yifei