[PyQt] accessing variables of class

[Vincent Vande Vyvre]

On 11/05/12 15:13, Enes Albay wrote:
> Hi,
>
> when i change
>
> class A(QtGui.QMainWindow):
>     ....
>     def setupUI(self):
>         self.lineEdit = QtGui.QLineEdit()
>         self.b = B()
>         self.b.c.clicked.connect(self.handleLetter)
>         ...
>
>     def handleLetter(self):
>         self.lineEdit.setText("Hello")
>
> there is no compilation or running error. But, lineEdit text doesn't
> change, nothing happening.
>
>
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.com
> http://www.riverbankcomputing.com/mailman/listinfo/pyqt
>
Why don't you pass a reference of the main windows to your's subclass?

This example is working:

-------------------------------
class A(object):
    def setupUI(self, MainWindow):
        self.layout = QtGui.QVBoxLayout()
        self.lineEdit = QtGui.QLineEdit(MainWindow)
        self.b = B(self, MainWindow)
        self.b.setGeometry(0, 30, 80, 35)
        MainWindow.show()

class B(QtGui.QWidget):
    def __init__(self, main, parent=None):
        super(B, self).__init__(parent)
        self.c = C(main, self)

class C(QtGui.QPushButton):
    def __init__(self, main, parent=None):
        super(C, self).__init__(parent)
        self.main = main
        self.clicked.connect(self.handleLetter)

    def handleLetter(self):
        self.main.lineEdit.setText('Hello')

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    mw = QtGui.QMainWindow()
    a = A()
    a.setupUI(mw)
    sys.exit(app.exec_())
-----------------------------------------------


Cheers

-- 
Vincent V.V.
Oqapy <https://launchpad.net/oqapy> . Qarte+7
<https://launchpad.net/qarte+7> . PaQager <https://launchpad.net/paqager>