QWebView linkclicked and form submit

[maddog_fr]

Hello everybody.
I am creating a new class to subclass QWebView

To manage link navigation i used :
view->page()->setLinkDelegationPolicy(QWebPage:elegateAllLinks); and connected
and then
connect( view->page(), SIGNAL(linkClicked(const QUrl&)),this, SLOT(OnLinkClicked(const QUrl&)));

it work for all kind of links but when a form is submitted I dont receive the signal and the submitted page is loaded in the QWebPage

I read that form submit call the function acceptNavigationRequest
and when I check in the sourcecode of Qwebpage and i get

#if QT_VERSION >= 0x040400
bool QWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
#else
bool QWebPage::acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, QWebPage::NavigationType type)
#endif
{
if (type == NavigationTypeLinkClicked) {
switch (d->linkPolicy) {
case DontDelegateLinks:
return true;
case DelegateExternalLinks:
if (WebCore::SecurityOrigin::shouldTreatURLSchemeAsLo cal(request.url().scheme()))
return true;
emit linkClicked(request.url());
return false;
case DelegateAllLinks:
emit linkClicked(request.url());
return false;
}
}
return true;
}

any navigation request should emit linkclicked when DelegateAllLinks is set


Where is the problem ? I am using Qt 4.5

thx for your help.

[EDIT:] I am beginning at Qt

[numbat]

The problem is here:

if (type == NavigationTypeLinkClicked)

if (type == NavigationTypeLinkClicked)

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According to the docs type will be QWebPage::NavigationTypeFormSubmitted for a form, and as such the code you pasted will just return true. You need to subclass QWebPage and override acceptNavigationRequest.

P.S Please use [code][/code] tags.

[maddog_fr]

geez i am stupid i didnt see the return true !!

another problem come then. I am not using directly QWebPage but a subclassed Qwebview
is it possible to use a subclassed QWebPage in my subclassed QWebview ?

[yogeshgokul]

is it possible to use a subclassed QWebPage in my subclassed QWebview ?

Yes you can use,

QWebView::setPage ( YOURPAGE * page )

QWebView::setPage ( YOURPAGE * page )

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[maddog_fr]

I just tried quickly but seems it's not so easy to subclass QWebPage

[maddog_fr]

I just tried quickly but seems it's not so easy to subclass QWebPage

Sublclassing QWebPage is not the problem in fact but it seems that the function acceptNavigationRequest is protected

[numbat]

I'm not a C++ guru, but I think protected member functions can be overridden in a subclass. Have you tried?

[maddog_fr]

Ok I managed to make it work (I guess my brain was tired yesterday).

//myqwebpage.h
#ifndef MYQWEBPAGE_H
#define MYQWEBPAGE_H
 
#include <QObject>
#include <QWebPage>
 
class MyQWebPage : public QWebPage
{
    Q_OBJECT
 
public:
    MyQWebPage(QObject *parent=0);
 
protected:
#if QT_VERSION >= 0x040400
    bool acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type);
#else
    bool acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, NavigationType type);
#endif
 
signals:
 #if QT_VERSION >= 0x040400
 void formSubmitted(const QNetworkRequest &request);
#else
 void formSubmitted(const QWebNetworkRequest &request);
#endif
 
 
};
 
#endif // MYQWEBPAGE_H

//myqwebpage.h
#ifndef MYQWEBPAGE_H
#define MYQWEBPAGE_H

#include <QObject>
#include <QWebPage>

class MyQWebPage : public QWebPage
{
    Q_OBJECT

public:
    MyQWebPage(QObject *parent=0);

protected:
#if QT_VERSION >= 0x040400
    bool acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, NavigationType type);
#else
    bool acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, NavigationType type);
#endif

signals:
 #if QT_VERSION >= 0x040400
 void formSubmitted(const QNetworkRequest &request);
#else
 void formSubmitted(const QWebNetworkRequest &request);
#endif


};

#endif // MYQWEBPAGE_H

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// myqwebpage.cpp
#include <QtGui>
#include "myqwebpage.h"
 
MyQWebPage::MyQWebPage(QObject *parent): QWebPage(parent){
}
 
 
#if QT_VERSION >= 0x040400
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
#else
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, QWebPage::NavigationType type)
#endif
{
    if (type == NavigationTypeFormSubmitted) {
        emit formSubmitted(request);
        return false;
    }
return QWebPage::acceptNavigationRequest(frame,request,type);
}

// myqwebpage.cpp
#include <QtGui>
#include "myqwebpage.h"

MyQWebPage::MyQWebPage(QObject *parent): QWebPage(parent){
}


#if QT_VERSION >= 0x040400
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
#else
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, QWebPage::NavigationType type)
#endif
{
    if (type == NavigationTypeFormSubmitted) {
        emit formSubmitted(request);
        return false;
    }
return QWebPage::acceptNavigationRequest(frame,request,type);
}

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then finaly I connect the signal to a slot

#if QT_VERSION >= 0x040400
connect(webpage,SIGNAL(formSubmitted(const QNetworkRequest&)),this,SLOT(OnFormSubmitted(const QNetworkRequest&)));
#else
connect(webpage,SIGNAL(formSubmitted(const QWebNetworkRequest&)),this,SLOT(OnFormSubmitted(const QWebNetworkRequest&)));
#endif

#if QT_VERSION >= 0x040400
connect(webpage,SIGNAL(formSubmitted(const QNetworkRequest&)),this,SLOT(OnFormSubmitted(const QNetworkRequest&)));
#else
connect(webpage,SIGNAL(formSubmitted(const QWebNetworkRequest&)),this,SLOT(OnFormSubmitted(const QWebNetworkRequest&)));
#endif

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thx for your help.

[maddog_fr]

Seems I did it for nothing.


I thought that the QNetworkRequest was holding the data to be posted but i dont find it.
any idea how to find the data ?

My goal is to open the result of the pos in a new window (window = a widget with a qwebview)

[maddog_fr]

Ok I managed to do what I want

#if QT_VERSION >= 0x040400
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
#else
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, QWebPage::NavigationType type)
#endif
{
    if (type == NavigationTypeFormSubmitted) {
        HTMLWindow *newWindow = WindowManager::instance()->addHTMLWindow();
        MyQWebView *webview;
        webview = newWindow->view;
        webview->load(request);
        return false;
    }
return QWebPage::acceptNavigationRequest(frame,request,type);
}

#if QT_VERSION >= 0x040400
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QNetworkRequest &request, QWebPage::NavigationType type)
#else
bool MyQWebPage::acceptNavigationRequest(QWebFrame *frame, const QWebNetworkRequest &request, QWebPage::NavigationType type)
#endif
{
    if (type == NavigationTypeFormSubmitted) {
        HTMLWindow *newWindow = WindowManager::instance()->addHTMLWindow();
        MyQWebView *webview;
        webview = newWindow->view;
        webview->load(request);
        return false;
    }
return QWebPage::acceptNavigationRequest(frame,request,type);
}

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