connect(library, SIGNAL(beginLoad(int)), this, SLOT(onBeginLoad(int)));
connect(library, SIGNAL(loading(const QString &)),
this, SLOT(onLoading(const QString &)));
connect(library, SIGNAL(endLoad()), this, SLOT(onEndLoad()));
connect(library, SIGNAL(beginLoad(int)), this, SLOT(onBeginLoad(int)));
connect(library, SIGNAL(loading(const QString &)),
this, SLOT(onLoading(const QString &)));
connect(library, SIGNAL(endLoad()), this, SLOT(onEndLoad()));