Automatically connect JavaScript functions to signal emissions of plugin objects

HTML code usually hooks JavaScript functions to events emitted by plugin objects using one of the following syntaxes (assuming that the class behind testWidget has a signal "TestSignal(QString)"):

<object id="testWidget" type="testmime" width="500" height="400">
</object>

<script type="text/javascript" language="javascript">
// Netscape style
testWidget.TestSignal = function(s)
{
alert(s);
}

// Internet Explorer style
function testWidget::TestSignal(s)
{
alert(s);
}
</script>

Neither of this works with QtWebKit; the C++ code that wants to hook a signal up with a JavaScript function has to do

webView->page()>mainFrame()>evaluateJavaScript("TestSignal(\"" + s + "\")");

instead.