Qt4: How to call JavaScript functions in a page from C++ via QtWebkit?

Answer 1

If you are using Qt 4.5 do it something like this:

htmlView->page()->mainFrame()->evaluateJavaScript("add_message(); null");

Note: null at the end of script is for performance issue. QWebFrame::evaluateJavaScript returns QVariant with last value in the script. Evaluating last value in the script may be really time consuming, so putting null at the end makes it return immediately.