Access UI from another class

jipe3001

I am trying to create a class which should access a ui object via a connect function as
Ui is private but can't get it work:

I wrote the connect function in the secondary class as follows:
QObject::connect(objetA, SIGNAL(SendPlot()),MainWindow, SLOT(addPlot()) );

but can't figure out why it is not working.

AddPlot program is just adding a Widget to a HorizontalLayout

jsulm

@jipe3001 First of all do this:

qDebug() << QObject::connect(objetA, SIGNAL(SendPlot()),MainWindow, SLOT(addPlot()) );

Does it print true? And can you see any warnings when you start your application?
Is the SendPlot() signal emitted somewhere?

SGaist

Hi,

is MainWindow the name of the class or of an object ?

jipe3001

MainWindow is the class of the QMainwindow managed by Ui

I just need to add A Qwidget to the Horizontal Layout included in MainWindow
from another class and get out how to access Ui (private) from external class.

I guess connect is the best way, any help appreciated

SGaist

You can't connect an object to a class. Both end must be objects.

jerome_isAviable

@jipe3001
because you can not link a class name, you have to link an object or a pointer to the object.
So, a solution is to pass a pointer (or a reference) to the object who has the type name of your class (MainWindow) to the object who has the type name of the class from where you want to connect SIGNAL/SLOT (if you call the second UI object from inside the MainWindow object, it should be: "this"). Then, just use the pointer or the reference instead of the class name (i think you will probably connect them in the constructor of your class).