Subclassing a QWebView

[UKCitizen1423]

Hi All,

I need to solve the issue of navigating links within an iframe with a QWebView. After setting setLinkDelegationPolicy(QWebPage::DelegateAllLinks ), I check the link and then with the pages I'm not interested in then I open the link but if this link is in an iframe then the QWebView will open the link in the main frame and not the iframe. I know I need to subclass the QWebView and the closest example I get is here:

http://www.qtcentre.org/threads/22997-QWebView-linkclicked-and-form-submit

but I can't find a full code example ( .h and .cpp ) and my attempts produce linker errors. I guess a guru could set this up in less than 5 minutes but I've spent hours and hours on this :(

As mentioned, I've seen a few solutions and at least one where somebody solves with JavaScript. I would appreciate help and I'm sure others would appreciate a small example. I don't know if this should have been posted in the advanced section?

Thanks!!

[UKCitizen1423]

Am I posting to the wrong section? No answers or views :(

[wysota]

What exactly is the problem? What errors are you getting?

[UKCitizen1423]

Hi Wysota,

Thanks for the reply. I have solved the linking errors but I need to know how to navigate pages within a iframe or frameset rather than the top main frame. As far as I understand then I am supposed to over ride navigation request in the subclassed QWebView something like:


bool MyWebView::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
{
//Q_UNUSED(frame)
if (type == NavigationTypeLinkClicked) {
switch (d->linkPolicy) {
case DontDelegateLinks:
return true;

case DelegateExternalLinks:
if (WebCore::SchemeRegistry::shouldTreatURLSchemeAsLo cal(request.url().scheme()))
return true;
emit linkClicked(request.url());
return false;

case DelegateAllLinks:
emit linkClicked(request.url());
frame->load(QUrl("http://www.google.com/")); // Need to analyse first
qDebug() << "LINK HAS BEEN CLICKED";
return true;
}
}
return true;
}

It is obviously wrong as I will get all sorts of errors such as:

"error: use of undeclared identifier 'NavigationTypeLinkClicked'
if (type == NavigationTypeLinkClicked) {
^"

and

"error: 'd' is a private member of 'QWebView'
switch (d->linkPolicy) {"

and

"error: member access into incomplete type 'QWebViewPrivate'
switch (d->linkPolicy) {
^
^"

So I need an overview or quick example of how to cater for iframe navigation in a subclassed QWebView.

FYI

I have subclassed a QWebPag to specify a specific useragent and that works OK.

I'm sure newbies would appreciate a full example of navigating within iframes as other solutions just state override the acceptNavigationRequest method to access the specific frame.

Regards & Thanks

[wysota]

I'm not sure what the problem is... The web frame is the method's parameter, you can access it there...

[UKCitizen1423]

Wysota,

First of all - thanks for your time, appreciated! I've made some progress.

I have a subclassed QWebPage

I have this:


*****************
bool MyCustomWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
{


if (frame->parentFrame() != 0){
if (type == NavigationTypeLinkClicked) {
//frame->setUrl(request.url()); // THIS FAILS
frame->setUrl(QUrl("http://www.google.co.uk")); // this works now and changes the URL in the frame
// I Need to analyse the querystring parameters first
}
}
qDebug() << "LINK HAS BEEN CLICKED"; // Just Checking where I am
return true;
}
******************

Note this works with no setLinkDelegationPolicy(QWebPage::DelegateAllLinks ); NOT being set

Notice that:

frame->setUrl(request.url()); // THIS FAILS

With

error: member access into incomplete type 'const QNetworkRequest'
frame->setUrl(request.url()); // Need to analyse first
^

on the setUrl() method

So

a) I need to analyse the url

b) I need to shut of that error

Thanks in advance.

Regards

[wysota]

#include <QNetworkRequest>

BTW. Please use the [code] tags.

[UKCitizen1423]

Wysota,

Bingo! That does the job nicely. Thank you.

Point taken on the code tags.