[PyQt] negative index "setWidget" not working as expected

[Sebastian Elsner]

Hallo,

inserting widgets with a negative index does not work as expected. I was 
expecting -1 to add a widget to the end and -2 to insert it right before 
the last widget in the layout. Is my assumption wrong?

Demo code:

from PyQt4.QtGui import QLineEdit, QCheckBox, QPushButton, QDialog, 
QFormLayout, \
     QVBoxLayout, QApplication

class Gui(QDialog):
     def __init__(self):
         QDialog.__init__(self)

         editLayout = QFormLayout()
         editLayout.addRow("enter something:", QLineEdit())

         editLayout.addRow("enter another something:", QLineEdit())

         button = QPushButton("press me")

         layout = QVBoxLayout()
         layout.addLayout(editLayout)
         layout.addWidget(button)

         self.setLayout(layout)

         self.layout().insertWidget(-2, QCheckBox("check me!"))

app = QApplication([])
g = Gui()
g.show()
app.exec_()

cheers

Sebastian