How to save the QPixmap of a label which consist of one more label above it which has a Qpixmap - qt

Question

I have inherited the QLabel to create my own class of QLabel, The code is below:
class myLabel : public QLabel
{
Q_OBJECT
public:
explicit myLabel(QWidget *parent=nullptr): QLabel(parent){ setFrameShape(QFrame::Box);}
QLabel insideLabel;
};
As you can see, My class has one QLabel member inside.
Now, What I have done is that I created the object of my class and assign a image to it using setPixmap() and also assign a image to my QLabel member inside my class. The code is below:
QFile file("file.png");
ui->setupUi(this);
//Creatig instance of my QLabel class and setting one image to it.
myLabel *label=new myLabel(this);
label->setPixmap(QPixmap("someImagePath"));
//Assining image to my class QLabel member.
label->insideLabel.setPixmap(QPixmap("someImagePath"));
//saving file.
label->pixmap()->save("imageName","png",-1);
So when I save the image it only save the image of my QLabel class object QPixmap instead of saving both of my label image as the insideLabel is present above the my label class object as it is it's member. How can i save both images of my labels as one image.

Answer 1

Your code is not trying to save a QLabel, you are trying to save the pixmap property of a QLabel, those are two very different things.
A QLabel is a widget that can be rendered on a paint device. You should read the documentation about the QWidget subsystem:
Qt Widgets module
I see some problems with your code, the inside widget has no parent, and in your case I think that is a problem, but explaining that is beyond your question.
If what you want is to render the widget into an image file, you could do something like this:
QPixmap pixmap(Widget->size());
Widget->render(&pixmap);
pixmap.save("widget_render_file.png");
If you want to compose an image you can directly draw on a painter attached to a pixmap like this:
QPixmap pixmap(100,100);
QPainter painter(pixmap);
painter.setPen (...);
painter.drawPixmap (...);
painter.end();
pixmap.save(...);
You should also check documentation on QPainter and QPixmap, there's a lot of useful drawing/painting functions.

Answer 2

I just saved the needed portion of my Widget window as image, below is my code
label=new myLabel(this);
label->setGeometry(50,50,300,300);
label->setPixmap(QPixmap("/home/vinay/Pictures/exp.png").scaled(label->width(),label->height()));
label->insideLabel=new QLabel(this);
label->insideLabel->setGeometry(50,50,50,50);
label->insideLabel->setPixmap(QPixmap("/home/vinay/Pictures/exp2.png"));
label->insideLabel->setFrameShape(QFrame::Box);
label->insideLabel->setLineWidth(3);
//Assining image to my class QLabel member.
//saving file.
label->pixmap()->save("imageName","png",-1);
//ui->myWidget->grab().save("image.png");
QRect r(50,50,300,300);
Widget::grab(r).save("image.png");