I researched this in code (in C ++) and found it a little perplexing until, finally, I looked at the source code for QWebView. It seems to be QWebView::sizeHint()hardcoded up to 800 x 600 (Qt 4.6).
This seems a little strange to me, but I'm not sure to report an error. If someone can post a comment to confirm or deny it is correct, that would be nice :)
, / / .
, , , QWebView (300), , . QWebView 800, , , . , , , , , .