Multi-dialog program in PyQT will not close

[Danny Hatt]

For my project, I require multiple widgets to be linked to each other. One button would go from one level, another button would go down two levels. To get a basic idea of what I'm looking for without showing all my code, here is a compilable example:

'''
Created on 2010-06-18
 
@author: dhatt
'''
 
import sys
from PyQt4 import QtGui, QtCore
 
class WindowLV3(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
 
        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV3')
 
        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
 
        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('quit()'))  # this doesn't work
 
 
class WindowLV2(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.Window3 = WindowLV3()
 
        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV2')
 
        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
 
        next = QtGui.QPushButton('Lv3', self)
        next.setGeometry(10, 50, 60, 35)
 
        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('reject()'))  # this doesn't work
 
        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)
 
    def nextWindow(self):
        self.Window3.show()
 
 
class WindowLV1(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.Window2 = WindowLV2()
 
        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV1')
 
        next = QtGui.QPushButton('Lv2', self)
        next.setGeometry(10, 50, 60, 35)
 
        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
 
        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)
 
    def nextWindow(self):
        self.Window2.show()
 
        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('reject()'))  # this doesn't work        
 
 
if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    Window1 = WindowLV1()
    Window1.show()
    sys.exit(app.exec_())

'''
Created on 2010-06-18

@author: dhatt
'''

import sys
from PyQt4 import QtGui, QtCore

class WindowLV3(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV3')

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
        
        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('quit()'))  # this doesn't work


class WindowLV2(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.Window3 = WindowLV3()

        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV2')

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
        
        next = QtGui.QPushButton('Lv3', self)
        next.setGeometry(10, 50, 60, 35)

        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('reject()'))  # this doesn't work
        
        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)
            
    def nextWindow(self):
        self.Window3.show()


class WindowLV1(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.Window2 = WindowLV2()

        self.setGeometry(300, 300, 120, 150)
        self.setWindowTitle('LV1')
        
        next = QtGui.QPushButton('Lv2', self)
        next.setGeometry(10, 50, 60, 35)

        quit = QtGui.QPushButton('Close', self)
        quit.setGeometry(10, 10, 60, 35)
           
        self.connect(next, QtCore.SIGNAL('clicked()'),
            self.nextWindow)
            
    def nextWindow(self):
        self.Window2.show()

        self.connect(quit, QtCore.SIGNAL('clicked()'),
            QtGui.qApp, QtCore.SLOT('reject()'))  # this doesn't work        


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    Window1 = WindowLV1()
    Window1.show()
    sys.exit(app.exec_())

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The problem is that I cannot close from a window and show the previous window. For example, if I clicked 'CLOSE' from inside from a LV3 window, it will transfer control back to a LV2 window.

What am I doing wrong?

[ksorensen]

I am not sure about how it should work.
But here are some things I noticed.

quit and next should be local in LV2 and LV3 - change to self.quit and self.next

QApplication does not have reject(). I changed it to quit() in LV1

And finally, self.connect for quit in LV1 is defined inside nextWindow. Should be moved up before nextWindow.

I have attached the code. Changed geometry settings to windows don't overlap - easier to see.multiwin.py