[webkit-qt] problem when using QtWebKit to get elements from page

Mon Sep 27 19:32:09 PDT 2010

Hi all,
I am using Qt SDK by Nokia v2010.04 (open source). I want to get webelement
from page through webkit component but the result confuses me.

If using code like this:

main.h

#ifndef MAIN_H
#define MAIN_H

#include <QtGui>
#include <QtWebKit>

class View : public QWebView
{
    Q_OBJECT

public:
    View(QWidget *parent = 0);

private slots:
    void loadFinished(bool ok);
};

#endif // MAIN_H

main.cpp

#include "main.h"

View::View(QWidget *parent) : QWebView(parent)
{
    setUrl(QUrl("http://www.google.com"));
    connect(this, SIGNAL(loadFinished(bool)), SLOT(loadFinished(bool)));
}

void View::loadFinished(bool ok)
{
    Q_UNUSED(ok);
    QWebFrame *frame = page()->mainFrame();
    QWebElement element = frame->findFirstElement("div");
    qDebug() << element.toPlainText();
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    View view;
    view.show();

    return app.exec();
}

The debug output will print out some html. But if I change main.cpp
code as follow:

#include "main.h"

 View::View(QWidget *parent) : QWebView(parent)

{

    setUrl(QUrl("http://www.google.com"));

    connect(this, SIGNAL(loadFinished(bool)), SLOT(loadFinished(bool)));

}

 void View::loadFinished(bool ok)

{

    Q_UNUSED(ok);

    QWebFrame *frame = page()->mainFrame();

    QWebElement element = frame->findFirstElement("div");

    qDebug() << frame->toHtml();

     QWebView webView;

    webView.setUrl(QUrl("http://www.google.com"));

    qDebug() << webView.page()->mainFrame()->toHtml();

}

 int main(int argc, char *argv[])

{

    QApplication app(argc, argv);

     View view;

    view.show();

     return app.exec();

}

The second debug output is "<html><head></head><body></body></html>".
Why can't I just create a simple QWebView instance for retrieving
elements? I have created a post on forum Nokia for this issue
(http://discussion.forum.nokia.com/forum/showthread.php?210271-webelement-can-t-be-retrieved-in-Simple-Selector-Example&p=779849#post779849).
Thanks.

regards,
qichao
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