Set QLineEdit text from function in second file

Samuel Bachorik

Hello, iam trying to set text from function in other file and it is not working can you help me with this ? Let me give you example....

My button is connected to function clicked0 and this button should change text.
This is my main file

   class Window(QMainWindow):

   def __init__(self):
       super().__init__()
       self.textboxvalue2 = ""


       self.setWindowTitle("Samuel calc™")
       self.setGeometry(200, 200, 259, 258)

       self.textbox = QLineEdit(self)
       self.textbox.move(5, 5)
       self.textbox.resize(188, 35)
       self.textbox.setText(str(self.textboxvalue2))
       self.textbox.setPlaceholderText("Enter numbers")
       self.textboxValue = self.textbox.text()

       self.b10 = QtWidgets.QPushButton(self)
       self.b10.setText("0")
       self.b10.move(68, 219)
       self.b10.resize(60, 35)
       self.b10.clicked.connect(self.clicked0)


       self.show()

   def setExpression(self,expression):
       print(expression)
       self.textbox.setText(str(expression))


   def clicked0(self):
       import AbstratctNumberButton
       AbstratctNumberButton.onClick()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = Window()
    sys.exit(app.exec())

And this is my second file from where i call function onClick()
secondFile.py

from main import Window

def onClick():
    print("abstract button")
    dj = Window()
    dj.setExpression(str(0))

When i run this my button not working.. when i put this function in main.py file then it is wokking

SGaist

Hi,

"dj" lifetime is related to onClick.

Samuel Bachorik

Iam sorry i dont understand ? What should i do to get it work ?

jsulm

@Samuel-Bachorik dj is a local variable inside onClick. It is destroyed as soon as onClick finishes. Make dj a variable in secondFile.py or a member variable if onClick is in a class.

JonB

@Samuel-Bachorik
Probably make dj a member variable in self. As it stands, dj = Window() creates a Window, but then goes out of scope and so the Window gets destroyed as soon as you exit the onClick() slot.

However, I suspect there is/may be some confusion here. You create one window = Window in the __main__ scope. Window is a QMainWindow. You then create a new, separate Window in onClick. Why? In normal case your program should have only one QMainWindow, why do you want a second one? If you want another window, why make it a QMainWindow?