Fixed layout reference control on layouts.

Reviewer: Luciano Wolf <luciano.wolf@openbossa.org>

PySide/QtGui/glue/qlayout_help_functions.h

@@ -3,24 +3,40 @@
 
 void addLayoutOwnership(QLayout *layout, QLayoutItem *item);
 
+inline QString retrieveObjectName(PyObject *obj)
+{
+    Shiboken::AutoDecRef objName(PyObject_Str(obj));
+    return QString(PyString_AsString(objName));
+}
+
 inline void addLayoutOwnership(QLayout *layout, QWidget *widget)
 {
     //transfer ownership to parent widget
     QWidget *parent = layout->parentWidget();
-    if (!parent)
-        return;
 
-    Shiboken::AutoDecRef pyParent(Shiboken::Converter<QWidget*>::toPython(parent));
+    if (!parent) {
-    Shiboken::AutoDecRef pyChild(Shiboken::Converter<QWidget*>::toPython(widget));
+        //keep the reference while the layout is orphan
-    Shiboken::setParent(pyParent, pyChild);
+        Shiboken::AutoDecRef pyParent(Shiboken::Converter<QWidget*>::toPython(layout));
+        Shiboken::AutoDecRef pyChild(Shiboken::Converter<QWidget*>::toPython(widget));
+        Shiboken::keepReference(reinterpret_cast<Shiboken::SbkBaseWrapper*>(pyParent.object()), qPrintable(retrieveObjectName(pyParent)), pyChild, true);
+    } else {
+        Shiboken::AutoDecRef pyParent(Shiboken::Converter<QWidget*>::toPython(parent));
+        Shiboken::AutoDecRef pyChild(Shiboken::Converter<QWidget*>::toPython(widget));
+        Shiboken::setParent(pyParent, pyChild);
+    }
 }
 
 inline void addLayoutOwnership(QLayout *layout, QLayout *other)
 {
     //transfer all children widgetes from other to layout parent widget
     QWidget *parent = layout->parentWidget();
-    if (!parent)
+    if (!parent) {
+        //keep the reference while the layout is orphan
+        Shiboken::AutoDecRef pyParent(Shiboken::Converter<QLayout*>::toPython(layout));
+        Shiboken::AutoDecRef pyChild(Shiboken::Converter<QLayout*>::toPython(other));
+        Shiboken::keepReference(reinterpret_cast<Shiboken::SbkBaseWrapper*>(pyParent.object()), qPrintable(retrieveObjectName(pyParent)), pyChild, true);
         return;
+    }
 
     for (int i=0, i_max=other->count(); i < i_max; i++) {
         addLayoutOwnership(layout, other->itemAt(i));

PySide/QtGui/glue/qwidget_glue.h

@@ -1,3 +1,10 @@
+static QString retrieveObjectName(PyObject *obj)
+{
+    Shiboken::AutoDecRef objName(PyObject_Str(obj));
+    return QString(PyString_AsString(objName));
+}
+
+
 /**
  * Tranfer objects ownership from layout to widget
  **/
@@ -26,6 +33,9 @@ qwidgetReparentLayout(QWidget *parent, QLayout *layout)
 
     Shiboken::AutoDecRef pyChild(Shiboken::Converter<QLayout*>::toPython(layout));
     Shiboken::setParent(pyParent, pyChild);
+
+    //remove previous references
+    Shiboken::keepReference(reinterpret_cast<Shiboken::SbkBaseWrapper*>(pyChild.object()), qPrintable(retrieveObjectName(pyChild)), Py_None);
 }
 
 static inline void

tests/QtGui/qlayout_ref_test.py

@@ -46,7 +46,7 @@ class SaveReference(UsesQApplication):
         l = QHBoxLayout()
         self.assertEqual(getrefcount(self.widget1), 2)
         l.addWidget(self.widget1)
-        self.assertEqual(getrefcount(self.widget1), 2)
+        self.assertEqual(getrefcount(self.widget1), 3)
 
         w = QWidget()
         w.setLayout(l)

tests/QtGui/qlayout_test.py

@@ -2,7 +2,7 @@ import unittest
 import sys
 
 from helper import UsesQApplication
-from PySide.QtGui import QLayout, QWidget, QPushButton, QWidgetItem
+from PySide.QtGui import QLayout, QWidget, QPushButton, QWidgetItem, QHBoxLayout
 
 class MyLayout(QLayout):
     def __init__(self, parent=None):
@@ -29,24 +29,47 @@ class MyLayout(QLayout):
 
 
 
-#Test if a layout implemented in python, the QWidget.setLayout works 
+#Test if a layout implemented in python, the QWidget.setLayout works
-#fine because this implement som layout functions used in glue code of 
+#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)
+
 if __name__ == '__main__':
     unittest.main()