[Qt-interest] how to exchange value between javascript and Qwebview?

Tue Mar 8 05:17:06 CET 2011

hi
The problem is in your js code. you define the 'address' variable as local inside a function, and then return it from outside that function.
have you tried running the function from within js? I suspect that this is not a Qt issue at all.
No'am

----- Original message -----
> Hi All,
>
> I am trying to execute javascript through QWebview. when i am returning
> value from javascript to Qwebview, the returned value is printing null.
> I got stuck here.
> if anyone knows, please tell me how to return that value to Qt?
>
> My Qt code:
> ......
> name1=
> webView->page()->mainFrame()->evaluateJavaScript("calcRoute('germany',
> 'france')");
> qDebug()<< "The I  result is" << name1.toString();  //printing NULL
> .......
>
> My Javascript code:
> <html>
> <script type="text/javascript"
> src="http://maps.google.com/maps/api/js?sensor=false"></script>
> <script type="text/javascript">
> ..........
>  var directionsService = new google.maps.DirectionsService();
>  function initilaize()
>  {
>          directionsDisplay = new google.maps.DirectionsRenderer();
>        var chicago = new google.maps.LatLng(41.850033, -87.6500523);
>        var myOptions = {
>            zoom:7,
>            mapTypeId: google.maps.MapTypeId.ROADMAP,
>            center: chicago
>        }
>        map = new google.maps.Map(document.getElementById("map_canvas"),
> myOptions);
>        directionsDisplay.setMap(map);
>
> directionsDisplay.setPanel(document.getElementById("directionsPanel"));
>    }
>
>  function calcRoute(start, end) {
>                var address;
>                var directions = new Array();
>                var request = {
>                origin:start,
>                destination:end,
>                travelMode: google.maps.DirectionsTravelMode.DRIVING
>        };
>        directionsService.route(request, function(response, status); {
>            if (status == google.maps.DirectionsStatus.OK) {
>                //directionsDisplay.setDirections(response);
>                var address = response.routes[0].legs[0].start_address;
>                }
>        });
>        return address;
>    }
> </script>
> <body onload="initialize()">
> ........
> </body>
> </html>
>
> --
> Regards,
> Karthick
>
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