How to get object pointer from a layout

ivanicy

Hello!!! I am trying to get the pointer of an object from a layout in which I put it:

void function() {
     MyClass *myClass = new MyClass();
     ui->myLayout->addWidget(myClass);
}

// In other part of the code...

MyClass *newPointerClass = ui->myLayout->getPointer();

How can I do this "getPointer()" ??

I hope I have explained clearly

Thank you very much!

dheerendra

How is this UI displayed ? Instead of this you can use findchild API of qobject

SGaist

Hi,

How many of these widget are you adding ?

As @dheerendra suggested, QObject::findChild is likely going to be your friend.

ivanicy

@SGaist I have only one widget per layout.
Would I have to use a reinterpret_cast or how would that line be?

Thanks both of you @dheerendra @SGaist

dheerendra

show us where are you creating the ui object and how r you calling setupUI method.

ivanicy

@dheerendra
My code is very similar to the one exposed in my first post.

A local object created inside a function and this object added to the layout with layout->addWidget method.

In other part of the code, I want to recover this object in another pointer. The layout is created with Qt designer.

jsulm

@ivanicy Please take a look at documentation: http://doc.qt.io/qt-5/qobject.html#findChild
You can do it like this:

MyWidget *childWidget = parentWidget->findChild<MyWidget*>("widget_name");

dheerendra

ui->myLayout->addWidget(myClass);

Where & how ui object is created ? @jsulm has already given you how to find the child with name of the object.