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import unittest
import sys
from helper import UsesQApplication
from PySide.QtGui import QLayout, QWidget, QPushButton, QWidgetItem, QHBoxLayout
class MyLayout(QLayout):
def __init__(self, parent=None):
QLayout.__init__(self, parent)
self._list = []
def addItem(self, item):
self.add(item)
def addWidget(self, widget):
self.add(QWidgetItem(widget))
def itemAt(self, index):
if index < len(self._list):
return self._list[index]
return None
def count(self):
return len(self._list)
def add(self, item):
self._list.append(item)
class MissingItemAtLayout(QLayout):
def __init__(self, parent=None):
QLayout.__init__(self, parent)
self._list = []
def addItem(self, item):
self.add(item)
def addWidget(self, widget):
self.add(QWidgetItem(widget))
def count(self):
return len(self._list)
def add(self, item):
self._list.append(item)
#Test if a layout implemented in python, the QWidget.setLayout works
#fine because this implement som layout functions used in glue code of
#QWidget, then in c++ when call a virtual function this need call the QLayout
#function implemented in python
class QLayoutTest(UsesQApplication):
def testOwnershipTransfer(self):
b = QPushButton("teste")
l = MyLayout()
l.addWidget(b)
self.assertEqual(sys.getrefcount(b), 2)
w = QWidget()
#transfer ref
w.setLayout(l)
self.assertEqual(sys.getrefcount(b), 3)
def testReferenceTransfer(self):
b = QPushButton("teste")
l = QHBoxLayout()
# keep ref
l.addWidget(b)
self.assertEqual(sys.getrefcount(b), 3)
w = QWidget()
# transfer ref
w.setLayout(l)
self.assertEqual(sys.getrefcount(b), 3)
# release ref
del w
self.assertEqual(sys.getrefcount(b), 2)
def testMissingFunctions(self):
w = QWidget()
b = QPushButton("test")
l = MissingItemAtLayout()
l.addWidget(b)
self.assertRaises(RuntimeError, w.setLayout, l)
if __name__ == '__main__':
unittest.main()
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