How to lauch an external file from Qt?

Question

I'd like to open a pdf file simply double-clicking on one element of a QListWidget. I created a batch file to open Acrobat Reader (reader.bat), but I want a specific pdf file:

void MainWindow::on_FileListWidget_itemDoubleClicked(QListWidgetItem *item)
{
        QFile SelectedModel(Current_Path  + "/Template/" + item->text());
        QString FileName;
        FileName = (Current_Path  + "/Template/" + item->text());
        ::system("e:\\reader.bat");
}

1) I don't know what's could be better from QFile or QString in order to identify and choose the file from the QListWidget; 2) I dont' know how to add the file to the command to open Acorbat Reader (in the shown line I'm able to open the program but not my file). Any idea?

Answer 1

You can use Qt native methods to achieve this behaviour by calling

QDesktopServices::openUrl(QUrl::fromLocalFile("someFilePath"));

See QUrl::fromLocalFile() and QDesktopServices::openUrl()

(Refer to this post)

Answer 2

Take a look at this: http://qt-project.org/doc/qt-5/qdesktopservices.html#openUrl

QDesktopServices::openUrl(QUrl("file://path/to/file"));

This not only takes care of opening the file with the default application (if the file:// scheme is used), but will also open a web URL with the default browser (if the http:// or https:// scheme is used) or will open it with the default email client in case of a mailto:// scheme. It works with other schemes like steam://, itunes:// etc. as well.