Fixes bug #910 - installEventFilter() increments reference count on target object.

http://bugs.pyside.org/show_bug.cgi?id=910

Also added/fixed unit tests.

Reviewed by Hugo Parente <hugo.lima@openbossa.org>
Reviewed by Luciano Wolf <luciano.wolf@openbossa.org>

PySide/QtCore/typesystem_core.xml

@@ -1284,16 +1284,6 @@
         <define-ownership owner="c++"/>
       </modify-argument>
     </modify-function>
-    <modify-function signature="installEventFilter(QObject*)">
-      <inject-code>
-        Shiboken::Object::keepReference((SbkObject*)%PYARG_1, "eventFilter", %PYSELF, true);
-      </inject-code>
-    </modify-function>
-    <modify-function signature="removeEventFilter(QObject*)">
-      <inject-code>
-        Shiboken::Object::removeReference((SbkObject*)%PYARG_1, "eventFilter", %PYSELF);
-      </inject-code>
-    </modify-function>
     <!-- Invalidate-after-use stuff -->
     <modify-function signature="childEvent(QChildEvent*)">
         <modify-argument index="1" invalidate-after-use="yes"/>

tests/QtCore/qobject_event_filter_test.py

@@ -2,6 +2,8 @@
 '''Test cases for QObject.eventFilter'''
 
 import unittest
+import weakref
+import sys
 
 from PySide.QtCore import QObject, QTimerEvent
 
@@ -76,5 +78,39 @@ class TestQObjectEventFilterPython(UsesQCoreApplication):
         self.assertEqual(filtered.times_called, 5)
         self.assertEqual(self.obj_filter.events_handled, 5)
 
+    def testInstallEventFilterRefCountAfterDelete(self):
+        '''Bug 910 - installEventFilter() increments reference count on target object
+        http://bugs.pyside.org/show_bug.cgi?id=910'''
+        obj = QObject()
+        filt = QObject()
+
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.installEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+
+        wref = weakref.ref(obj)
+        del obj
+        self.assertEqual(wref(), None)
+
+    def testInstallEventFilterRefCountAfterRemove(self):
+        # Bug 910
+        obj = QObject()
+        filt = QObject()
+
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.installEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.removeEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+
+        wref = weakref.ref(obj)
+        del obj
+        self.assertEqual(wref(), None)
+
 if __name__ == '__main__':
     unittest.main()

tests/QtGui/event_filter_test.py

@@ -2,7 +2,7 @@ import unittest
 import sys
 
 from helper import UsesQApplication
-from PySide.QtCore import QObject, QEvent, QTimer
+from PySide.QtCore import QObject, QEvent
 from PySide.QtGui import QWidget
 
 class MyFilter(QObject):
@@ -17,10 +17,10 @@ class EventFilter(UsesQApplication):
         o = QObject()
         filt = MyFilter()
         o.installEventFilter(filt)
-        self.assertEqual(sys.getrefcount(o), 3)
+        self.assertEqual(sys.getrefcount(o), 2)
 
         o.installEventFilter(filt)
-        self.assertEqual(sys.getrefcount(o), 3)
+        self.assertEqual(sys.getrefcount(o), 2)
 
         o.removeEventFilter(filt)
         self.assertEqual(sys.getrefcount(o), 2)