summaryrefslogtreecommitdiffstats
path: root/tests/QtGui/qlayout_test.py
blob: 72c6d173bb85ab458606c4c9eac1b3de5fa8942d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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()