FramelessWindowHint freezes form with QAxWidget

Tikitko

An interesting problem when installing FramelessWindowHint flag all the content in the form as it is frozen, those buttons does not change when you hover style (: hover), and you can not edit the text field and more. All this happens when the form has QAxWidget. What could it be?
Win10 x32-x64
Qt 5.6 - 5.7

mrjj

Hi
That sounds odd.
Have you tried to create the QAxWidget later ?
Like via button.
After window is up and running etc.
Im wondering if QAxWidget get truma if put in
UI and then u set FramelessWindowHint in code.

Tikitko

I do everything on pure paper for the test...
i create 2 example photo:
no initialized qAxWidget
initialized qAxWidget

mrjj

@Tikitko
Ok, but in both cases, its included in the UI from start?
It seems once active it dont like FramelessWindowHint

I would look in
https://bugreports.qt.io/secure/Dashboard.jspa

and also test if you insert from code only
not having it in UI .

Tikitko

@mrjj
I tried so

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setWindowFlags(Qt::FramelessWindowHint);
}

like this

void MainWindow::on_pushButton_clicked()
{
    this->setWindowFlags(Qt::FramelessWindowHint);
    this->show();
}

and

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.setWindowFlags(Qt::FramelessWindowHint);
    w.show();
    qDebug() << w.windowFlags();

    return a.exec();
}

mrjj

@Tikitko said:

setWindowFlags(Qt::FramelessWindowHint);

ok, but the flag is not the issue. that works.

I was thinking about
void MainWindow::on_pushButton_clicked()
{
QAxWidget *Test = new QAxWidget(this);
Test->Show();
.. other setup

and not have it in UI.
just to test.

Tikitko

@mrjj hmm
i do this:

void MainWindow::on_pushButton_clicked()
{
    QAxWidget *Test = new QAxWidget(this);
    Test->setControl("{8856f961-340a-11d0-a96b-00c04fd705a2}");
    Test->dynamicCall("Navigate(const  QString&)","http://vk.com/");
    Test->show();
}

And work! this bug work when i create QAxWidget in Disigner...

Hmm when i creat not in on_pushButton_clicked also this bug...

mrjj

well my "theory" is that
if QAxWidget is assigned to a parent before FramelessWindowHint
then bug comes.

Tikitko

@mrjj Then the solution is not to create QAxWidget in the constructor?

mrjj

Well I assume u tested that ?
Create it after setupUI and FramelessWindowHint does not make it work ?

If no, you can try with the showEvent
void maiwinxx::showEvent( QShowEvent* event ) {
QMainwindxx::showEvent( event );

// create it here.

}

Tikitko

@mrjj i create:

void MainWindow::showEvent( QShowEvent* event ) {

    QAxWidget *Test = new QAxWidget(this);
    Test->setControl("{8856f961-340a-11d0-a96b-00c04fd705a2}");
    Test->dynamicCall("Navigate(const  QString&)","http://vk.com/");
    Test->show();

}

Not help...
Excuse me, I find it hard to understand you, because I'm Russian ...

mrjj

@Tikitko
Hi, np. That was what i wanted to test.

So if we create it before windows is fully shown we get bug?

But if you create in button_click , it works?

Tikitko

@mrjj Yes, once checked, it is so ...

mrjj

@Tikitko
very strange!
I though showEvent would been same as clicked.
Try timer so that we first create after window fully shown.

// in constructor
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(nowcreate()));
timer->start(4000);
}

void MainWindow::nowcreate() << add this to .h also
{
qDebug() << "nowcreate";
// create here
QAxWidget *Test = new QAxWidget(this);
..
}

Tikitko

@mrjj This work!

mrjj

@Tikitko
ok
so window must be fully shown to make it happy.
Good testing :)

Tikitko

@mrjj Thank you very much for your help! So show window, and then create a widget ... So still the question, it is a bug Qt or something else? The problem can be considered solved only in the bug tracker you need to add ...

mrjj

@Tikitko
You are most welcome.
well I think its a bug but not sure.
When bug comes, it seems to me it hangs. That seems like bug.

Oh I forgot to ask.
What is {8856f961-340a-11d0-a96b-00c04fd705a2} ?

Tikitko

@mrjj this is Internet Explorer but in any case, the error with any object in QAxWidget...

Tikitko

@mrjj Hello, another mament noticed everything was decided widget loading after displaying the window, but if you minimize the window and deploy the freeze button again ...