QWebView, Google maps

[Viper666]

Hi everyone,
i need help i make browser and i found bug: connection:

connect(view, SIGNAL(loadStarted()), this, SLOT(loadStarted()));

connect(view, SIGNAL(loadStarted()), this, SLOT(loadStarted()));

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slot loadStarted():

urlLine->RefreshButton()->setVisible(false);
    urlLine->StopButton()->setVisible(true);
//progressbar->setVisible(true); when this isn't comment line it crash program i don't know why i try try, catch blocks, program has been crashed too

urlLine->RefreshButton()->setVisible(false);
    urlLine->StopButton()->setVisible(true);
//progressbar->setVisible(true); when this isn't comment line it crash program i don't know why i try try, catch blocks, program has been crashed too

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Thanks