how can i access to SetContextProperty from Multiple classes

dziko147

Hello ,
I want access a SetContextProperty from another class .
how can i do this .
thank you

jsulm

@dziko147 said in how can i access to SetContextProperty from Multiple classes:

how can i do this

otherClassInstance.SetContextProperty(...);
// Or if otherClassInstance is a pointer
otherClassInstance->SetContextProperty(...);

Or what is the question?

dziko147

@jsulm thanks for your reply .

m_ui->quickWidget->rootContext()->setContextProperty("backend", &m_back);

what i need is to get the m_back in another class .

i am not pro in c++ development . So excuse me if my question is stupid :)

jsulm

@dziko147 said in how can i access to SetContextProperty from Multiple classes:

what i need is to get the m_back in another class

Why do you need it in another class?
But if you really need it there then implement a setter method in that class and call it passing m_back as parameter.

dziko147

@jsulm thank you for your suggestion

dziko147

who can provide me an example please :)

jsulm

@dziko147 What is so spetial about it?
You know how to implement a method with a parameter in C++ and how to call it then? This is really very basic C++.

dziko147

@jsulm I will explain you the situation and suggest me a way to solve it .

So , I display (radialbars) in a qml file using a Qquickwidget . I set Q_property , setter , getter , Notify method in backend class . then I would like to command this radialbars . So I create a command class .

Currently I have this code :

in My Mainwindow

m_ui->quickWidget->rootContext()->setContextProperty("backend", &m_back);

In my command.cpp

QString Mode= ui->modecommande->currentText(); // this is a combobox
qDebug() << Mode << "this is Mode select commande" ;
m_back.setdirectiontext(Mode); // this is my problem

Is it clear for you ?

KroMignon

@dziko147 said in how can i access to SetContextProperty from Multiple classes:

Is it clear for you ?

It is clear for me that you don't understand anything about C++ programming:

you don't know what a class is
you don't know what a variable is
you don't know what a class methods and attributes are
you don't know what getter/setter functions are

So please, first learn C++ basics and then you will understand what you have to do and how!

jsulm

@dziko147 said in how can i access to SetContextProperty from Multiple classes:

Is it clear for you ?

It is clear to you what I suggested?
Also, why do you need to set whole m_back in other class? This is bad design. From the code you posted you only need to share Mode. This is as easy as:

void MainWindow::setMode(const QString& mode)
{
    m_back.setdirectiontext(mode);
}

// command.cpp
QString Mode= ui->modecommande->currentText(); // this is a combobox
qDebug() << Mode << "this is Mode select commande" ;
mainWindow->setMode(Mode);

Even better would be to use signals/slots here, so the command does not have to know anything about MainWindow. But I let it as exercise...

dziko147

@jsulm ok now it's clear for me what should I do .
thank you :)