Signals and Slots between two classes

[VRonin]

Can you use the new connection syntax?
QObject::connect(&t, SIGNAL(valueChanged(int)),&w, SLOT(setValue(int))); should become QObject::connect(&t,&Test::valueChanged,&w,&Widget::setValue);

[ktrsathish]

@VRonin no change. signals are not recieved in slots.

[Christian Ehrlicher]

@ktrsathish said in Singals and Slots between two classes:

Form::Form(QWidget *parent) :
QWidget(parent),
ui(new Ui::Form)
{
ui->setupUi(this);
value = 0;
Test obj;
}

What should 'Test obj' do here?

void Form::on_button_clicked()
{
value = 1;
obj.EnableImage(value);
}

This is not the object you're doing your connect on.

[ktrsathish]

@Christian-Ehrlicher My actual implementaion shall follow the above architecture. so I have written the sample code to work first.

[mrjj]

@ktrsathish
Hi
Could you zip sample and upload via
https://www.justbeamit.com/ ( single use :( )
any other dropbox, Google drive, etc that can give a link
with no registration required to get it.

Code looks ok, but its easy to miss stuff due to all the scrolling.

[ktrsathish]

@mrjj https://drive.google.com/file/d/1d0Cc86uItT6F-ZzpbWtreATYICApRG1U/view?ts=5bd73a93
Please check the code and let me know the details.

[mrjj]

@ktrsathish
super !
but it asks permissions.
Can you remove that ?

[ktrsathish]

@mrjj https://drive.google.com/file/d/1d0Cc86uItT6F-ZzpbWtreATYICApRG1U/view?usp=sharing can you try now.

[mrjj]

@ktrsathish
Hi
In class Form, you have
private:
..
Test obj;

and you use that to emit

void Form::on_ABS_ON_clicked()
{
value = 1;
obj.EnableImage(value);
}

BUT
the one you hook up in main is another test instance
and its not used to emit the signal.

Test t;
 QObject::connect(&t, &Test::ValueChanged, &w, &Widget::setValue);

t is not the one u use to emit signal.

So that is why all looks fine but nothing happens.
The actual emitter object is not connected up.

So it was as mr. @Christian-Ehrlicher said / suggested

[ktrsathish]

@mrjj said in Signals and Slots between two classes:

Test t;
QObject::connect(&t, &Test::ValueChanged, &w, &Widget::setValue);

Thanks. It is solved.