Python 3, PyQt 4: split large class for GUI controls

Question

My class MainWindow(QMainWindow) for PyQt4 GUI has grown now and I want to split it somehow. The problem is that all numerous functions handling signals are very interconnected and influence other functions of the class. Is there any way to split it into several classes / files? Maybe separating all signals into one class? I don't really understand how to do that technically... I've also heard that there is some restriction from Qt (or PyQt) for multiple inheritance, which could solve the problem I guess (again, not obvious for me how exactly).

Just as an idea how it looks now (very very simplified, of course):

calss MainWindow(QMainWindow):
   ...
   def f1(self):
      if self.a1 == '...':
       ...
   def f2(self):
      if self.a2 == '...':
       ...
   def update(self):
      self.f3()
      self.f4()
      self.lineEdit.setText(self.a3)
      ...
   ...
   def on_radioButton_toggled(self):
      if self.radioButton.isChecked():
         self.a1 = '...'
   def on_comboBox_currentIndexChanged(self):
      if self.checkBox.isChecked():
         self.a2 = '...'
         self.f1()
      else:
         self.f2()
      self.update()
   ...

Pedru · Accepted Answer · 2012-07-12 16:23:38Z

1

In my application I did it like this, there's the main window which contains child widgets (frames and stuff...), the main window does basically two things: initialize its children and connect the signals between them. Like this you have a hierarchy of views which is much simpler to handle that one big thing.

I think there isn't a painless move from your program to a more hierarchical one, I could say: you should have though of that earlier, but I don't. =P To design the main window and its children QTdesigner comes in very handy.

And yes, AFAIK a class should not inherit form more than one PyQt class.

answered Jul 12, 2012 at 16:23

Pedru

1,4601 gold badge14 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python 3, PyQt 4: split large class for GUI controls

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related