Communication from Framelsee Window to Framed Window

[sanjeet]

Hi,

Here in our Application we are calling other application binary.
In our main application we are using Qt::FramelessWindowHint i.e our parent app is framess
and our child app is framed.

when we trying to call child application from parent application it is not running.

Kindly, please give solution to run application.

source:

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    setWindowFlags(Qt::FramelessWindowHint);note:this main parent window is framess.
 
    ui->setupUi(this);
}
Widget::~Widget()
{
    delete ui;
}
void Widget::on_pushButton_2_clicked()
{
    this->close();
}
void Widget::on_pushButton_clicked()
{
    QMessageBox msgBox(this);
    msgBox.setText("display a message");
    msgBox.setStyleSheet("background:cyan");
    msgBox.exec();
    system("/usr/bin/Gnome-Selfdiag -platform xcb "); Note:here this Gnome-Selfdiag app is framed.
}

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    setWindowFlags(Qt::FramelessWindowHint);note:this main parent window is framess.
    
    ui->setupUi(this);
}
Widget::~Widget()
{
    delete ui;
}
void Widget::on_pushButton_2_clicked()
{
    this->close();
}
void Widget::on_pushButton_clicked()
{
    QMessageBox msgBox(this);
    msgBox.setText("display a message");
    msgBox.setStyleSheet("background:cyan");
    msgBox.exec();
    system("/usr/bin/Gnome-Selfdiag -platform xcb "); Note:here this Gnome-Selfdiag app is framed.
}

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[anda_skoa]

Well, this is the code of the application that works, how does this "Gnome-Selfdiag" program set the frameless hint?

Cheers,
_

[sanjeet]

Hi,

For parent we have used "setWindowFlags(Qt::FramelessWindowHint)",so this is frameless, and for Gnome-Selfdiag we haven't used this, so it is framed and when we are running this application, it is hanging and Gnome-Selfdiag application is not running.

[anda_skoa]

For parent we have used "setWindowFlags(Qt::FramelessWindowHint)",so this is frameless, and for Gnome-Selfdiag we haven't used this, so it is framed and when we are running this application, it is hanging and Gnome-Selfdiag application is not running.

Ah, I misunderstood your original question. You mentioned frameless and framed as if that was important.

Your application hangs because you are running a blocking operation (system()).

If you want your program to continue while executing another as a child process, use QProcess.

Cheers,
_

[sanjeet]

Hi,

Thanks for your support....

Can you please give us any example.....????

---

Added after 28 minutes:

Hi,

I tried by using QProcess also...Same problem we are facing....
It's not working with QProcess.

[anda_skoa]

You forgot to post the code

Cheers,
_

[sanjeet]

Hi,

My code is....

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    setWindowFlags(Qt::FramelessWindowHint);
 
    ui->setupUi(this);
}
 
Widget::~Widget()
{
    delete ui;
}
 
void Widget::on_pushButton_2_clicked()
{
    this->close();
}
 
void Widget::on_pushButton_clicked()
{
    QMessageBox msgBox(this);
    msgBox.setText("display a message");
    msgBox.setStyleSheet("background:cyan");
    msgBox.exec();
        QString prg="/usr/bin/Gnome-Selfdiag";
        QStringList arguments;
        arguments << "-platform" << "xcb";
        QProcess *myproc = new QProcess(this);
//      myproc->start(prg,arguments);
//      myproc->waitForFinished();
        myproc->execute(prg,arguments);
  //  system("/usr/bin/Gnome-Selfdiag -platform xcb ");
}

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    setWindowFlags(Qt::FramelessWindowHint);

    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_2_clicked()
{
    this->close();
}

void Widget::on_pushButton_clicked()
{
    QMessageBox msgBox(this);
    msgBox.setText("display a message");
    msgBox.setStyleSheet("background:cyan");
    msgBox.exec();
        QString prg="/usr/bin/Gnome-Selfdiag";
        QStringList arguments;
        arguments << "-platform" << "xcb";
        QProcess *myproc = new QProcess(this);
//      myproc->start(prg,arguments);
//      myproc->waitForFinished();
        myproc->execute(prg,arguments);
  //  system("/usr/bin/Gnome-Selfdiag -platform xcb ");
}

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[anda_skoa]

Since you don't want to block, use QProcess::start().

You might also want to connect to the finished() signal to get the other program's exit code and the exit status, maybe also the error() signal.

Cheers,
_