Hi,

I have an application written in JavaScript. I am trying to port it on on Maemo Platform using Qt.

I have defined dosave()function in my javascript file which saves the contents in a “string” and returns it.

Similarly, I have open() function defined in javascript code, in which this particular string is passed and it displays the content back to the file I want to open. I have used evaluateJavaScript() function to interact with the javascript function.

I can save the file but when I pass the string to open(), I dont see my content. How can I pass QString variable to javascript function in Qt programming ? Kindly suggest something.

Here is the code for opening the saved file :

Qt Code: 
  1. void Test::on_pushButton3_clicked()  /// This function is activated when I click open button
  2. {
  3.     QString output;
  4.     QString fileName = QFileDialog::getOpenFileName(this);
  5.     qDebug() << fileName;
  6.          if (!fileName.isEmpty()) {
  7.              // read from file
  8.              QFile file(fileName);
  9.  
  10.  
  11.              if (!file.open(QIODevice::ReadOnly)) {
  12.                  QMessageBox::information(this, tr("Unable to open file"),
  13.                      file.errorString());
  14.                  return;
  15.              }
  16.  
  17.  
  18.              QDataStream in(&file);
  19.              in.setVersion(QDataStream::Qt_4_5);
  20.              in >> output;
  21.              qDebug() << output;  /// output is the string I need to send to JavaScript open() function. I checked it using qDebug and its 
  22.                                          //// working fine.
  23.        webView->page()->mainFrame()->evaluateJavaScript(QString("open(\"%1\")").arg(output));
  24.          }
  25.    }
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Here is the code for saving the file :

Qt Code: 
  1. void Test::on_pushButton2_clicked()
  2. {
  3.     {
  4.          QVariant content = webView->page()->mainFrame()->evaluateJavaScript("dosave()");  
  5.            QString data = content.toString();
  6.            qDebug() << data;
  7.          QString fileName = QFileDialog::getSaveFileName(this);
  8.  
  9.          if (!fileName.isEmpty()) {
  10.              // save to file
  11.              QFile file(fileName);
  12.  
  13.              if (!file.open(QIODevice::WriteOnly)) {
  14.                  QMessageBox::information(this, tr("Unable to open file"),
  15.                      file.errorString());
  16.                  return;
  17.              }
  18.  
  19.              QDataStream out(&file);
  20.              out.setVersion(QDataStream::Qt_4_5);
  21.              out << data;
  22.          }
  23.      }
  24. }
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I have used qDebug at different places to check the data and its working fine. Kindly suggest ways to send QString variable to Javascript function so that content can be displayed.