how to maximaize the label by using mouse click?

[wysota]

What have you tried so far to solve your problem?

[iswaryasenthilkumar]

before initialising my label i made my widget to full screen.
my code:
widget.cpp

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
 
    showFullScreen();
     activateWindow();
    label=new QLabel(this);
 
}

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{

    showFullScreen();
     activateWindow();
    label=new QLabel(this);

}

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displaying images in label:

void displayimages()
{
ImageToLoad.load(dir.absoluteFilePath(remoteimagefilename)); //image name
label->setPixmap(QPixmap::fromImage(ImageToLoad.scaled(1025,1025,Qt::KeepAspectRatio,Qt::FastTransformation))); label->showFullScreen();
}

void displayimages()
{
ImageToLoad.load(dir.absoluteFilePath(remoteimagefilename)); //image name
label->setPixmap(QPixmap::fromImage(ImageToLoad.scaled(1025,1025,Qt::KeepAspectRatio,Qt::FastTransformation))); label->showFullScreen();
}

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mouseclick event

void Widget::mousePressEvent(QMouseEvent *event)
    {
    if (event->button() & (Qt::LeftButton | Qt::RightButton))
    {
    showMaximized();
    activateWindow();
    update();
 
    }
    }

void Widget::mousePressEvent(QMouseEvent *event)
    {
    if (event->button() & (Qt::LeftButton | Qt::RightButton))
    {
    showMaximized();
    activateWindow();
    update();
     
    }
    }

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What have you tried so far to solve your problem?

[wysota]

The label is not a top-level widget, it cannot be shown as fullscreen.