Question

I have a MainWindow. On MainWindow I have multiple Qlabel’s. Now, i need to find the QLabel clicked.
Using MousePressEvent, i can get the X() and Y() position of the mouse clicked.

How can i use this Co-ordinate to identify the QLabel??

Is there any function in QT to find the Object clicked using X() and Y() co-ordinate??

Answer 1

Since QLabel is a subclass of QWidget, you can handle mouse press events in QLabel::mousePressEvent

virtual void mousePressEvent ( QMouseEvent * ev )

But in QMainWindow, you can use childAt to get the child widgets at x,y

QWidget * QWidget::childAt ( int x, int y ) const

QLabel* label= static_cast<QLabel*>(mainWindow->childAt(x,y));

Read more at:
http://doc.qt.io/qt-5/qwidget.html#childAt