Fixes bug #502.

The ownership of the editor returned by the Python override of
QAbstractItemDelegate.createEditor(...) is now transferred to C++.

A test was added to simulate the situation that triggers the bug,
instead of relying on an example with a view, model and editable cells.

See: http://bugs.openbossa.org/show_bug.cgi?id=502

Reviewed by Lauro Moura <lauro.neto@openbossa.org>
Reviewed by Renato Araújo <renato.filho@openbossa.org>

PySide/QtGui/typesystem_gui_common.xml

@@ -3047,6 +3047,9 @@
       <modify-argument index="1">
         <define-ownership owner="c++"/>
       </modify-argument>
+      <modify-argument index="return">
+        <define-ownership class="native" owner="c++"/>
+      </modify-argument>
     </modify-function>
   </object-type>
   <object-type name="QTableWidgetItem" >

tests/pysidetest/CMakeLists.txt

@@ -32,8 +32,8 @@ set(GENERATOR_EXTRA_FLAGS --generatorSet=shiboken --enable-parent-ctor-heuristic
 add_custom_command(OUTPUT ${testbinding_SRC}
 COMMAND ${GENERATORRUNNER_BINARY} ${GENERATOR_EXTRA_FLAGS}
         ${CMAKE_CURRENT_SOURCE_DIR}/global.h
-        --include-paths=${CMAKE_CURRENT_SOURCE_DIR}${PATH_SEP}${QT_INCLUDE_DIR}${PATH_SEP}${QT_QTCORE_INCLUDE_DIR}
+        --include-paths=${CMAKE_CURRENT_SOURCE_DIR}${PATH_SEP}${QT_INCLUDE_DIR}${PATH_SEP}${QT_QTCORE_INCLUDE_DIR}${PATH_SEP}${QT_QTGUI_INCLUDE_DIR}
-        --typesystem-paths=${CMAKE_CURRENT_SOURCE_DIR}${PATH_SEP}${pyside_SOURCE_DIR}${PATH_SEP}${QtCore_SOURCE_DIR}
+        --typesystem-paths=${CMAKE_CURRENT_SOURCE_DIR}${PATH_SEP}${pyside_SOURCE_DIR}${PATH_SEP}${QtCore_SOURCE_DIR}${PATH_SEP}${QtGui_SOURCE_DIR}${PATH_SEP}${QtGui_BINARY_DIR}
         --output-directory=${CMAKE_CURRENT_BINARY_DIR}
         ${CMAKE_CURRENT_SOURCE_DIR}/typesystem_pysidetest.xml
 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
@@ -44,8 +44,11 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}
                     ${CMAKE_CURRENT_BINARY_DIR}
                     ${QT_INCLUDE_DIR}
                     ${QT_QTCORE_INCLUDE_DIR}
+                    ${QT_QTGUI_INCLUDE_DIR}
                     ${SHIBOKEN_INCLUDE_DIR}
+                    ${pyside_SOURCE_DIR}
                     ${QtCore_BINARY_DIR}/PySide/QtCore
+                    ${QtGui_BINARY_DIR}/PySide/QtGui
                     ${libpyside_SOURCE_DIR}
                     ${PYTHON_INCLUDE_PATH})
 
@@ -63,12 +66,14 @@ target_link_libraries(testbinding
                       ${PYTHON_LIBRARIES}
                       ${SHIBOKEN_LIBRARY}
                       ${QT_QTCORE_LIBRARY}
+                      ${QT_QTGUI_LIBRARY}
                       ${SBK_PYTHON_LIBRARIES})
 
 add_dependencies(testbinding pyside QtCore libpyside pysidetest)
 
 
 PYSIDE_TEST(homonymoussignalandmethod_test.py)
+PYSIDE_TEST(delegatecreateseditor_test.py)
 PYSIDE_TEST(modelview_test.py)
 PYSIDE_TEST(version_test.py)
 

tests/pysidetest/delegatecreateseditor_test.py

@@ -0,0 +1,55 @@
+#!/usr/bin/python
+
+import unittest
+from helper import UsesQApplication
+
+from testbinding import TestView
+from PySide.QtCore import Qt
+from PySide.QtGui import QAbstractItemDelegate, QComboBox
+
+id_text = 'This is me'
+
+class DelegateDoesntKeepReferenceToEditor(QAbstractItemDelegate):
+    def createEditor(self, parent, option, index):
+        comboBox = QComboBox(parent)
+        comboBox.addItem(id_text)
+        return comboBox
+
+
+class DelegateKeepsReferenceToEditor(QAbstractItemDelegate):
+    def __init__(self, parent=None):
+        QAbstractItemDelegate.__init__(self, parent)
+        self.comboBox = QComboBox()
+        self.comboBox.addItem(id_text)
+
+    def createEditor(self, parent, option, index):
+        self.comboBox.setParent(parent)
+        return self.comboBox
+
+
+class EditorCreatedByDelegateTest(UsesQApplication):
+
+    def testDelegateDoesntKeepReferenceToEditor(self):
+        view = TestView(None)
+        delegate = DelegateDoesntKeepReferenceToEditor()
+        view.setItemDelegate(delegate)
+        editor = view.getEditorWidgetFromItemDelegate()
+        self.assertEqual(type(editor), QComboBox)
+        self.assertEqual(editor.count(), 1)
+        self.assertEqual(editor.itemData(0, Qt.DisplayRole), id_text)
+        editor.metaObject()
+
+    def testDelegateKeepsReferenceToEditor(self):
+        view = TestView(None)
+        delegate = DelegateKeepsReferenceToEditor()
+        view.setItemDelegate(delegate)
+        editor = view.getEditorWidgetFromItemDelegate()
+        self.assertEqual(type(editor), QComboBox)
+        self.assertEqual(editor.count(), 1)
+        self.assertEqual(editor.itemData(0, Qt.DisplayRole), id_text)
+        editor.metaObject()
+
+
+if __name__ == '__main__':
+    unittest.main()
+

tests/pysidetest/testview.cpp

@@ -1,12 +1,24 @@
 #include "testview.h"
-#include <QDebug>
+
-#include <stdio.h>
+#include <QWidget>
+#include <QAbstractListModel>
+#include <QAbstractItemDelegate>
 
 QVariant
 TestView::getData()
 {
     QModelIndex index;
-    QVariant data = m_model->data(index);
+    return m_model->data(index);
-    return data;
+}
+
+QWidget*
+TestView::getEditorWidgetFromItemDelegate() const
+{
+    if (!m_delegate)
+        return 0;
+
+    QModelIndex index;
+    QStyleOptionViewItem options;
+    return m_delegate->createEditor(0, options, index);
 }
 

tests/pysidetest/testview.h

@@ -2,12 +2,15 @@
 #define TESTVIEW_H
 
 #include <QObject>
-#include <QAbstractListModel>
 #ifdef pysidetest_EXPORTS
 #define PYSIDE_EXPORTS 1
 #endif
 #include "pysidemacros.h"
 
+class QWidget;
+class QAbstractListModel;
+class QAbstractItemDelegate;
+
 class PYSIDE_API TestView : public QObject
 {
     Q_OBJECT
@@ -15,8 +18,13 @@ public:
     TestView(QAbstractListModel* model, QObject* parent = 0) : QObject(parent), m_model(model) {}
     QAbstractListModel* model() { return m_model; }
     QVariant getData();
+
+    void setItemDelegate(QAbstractItemDelegate* delegate) { m_delegate = delegate; }
+    QWidget* getEditorWidgetFromItemDelegate() const;
+
 private:
     QAbstractListModel* m_model;
+    QAbstractItemDelegate* m_delegate;
 };
 
 #endif // TESTVIEW_H

tests/pysidetest/typesystem_pysidetest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0"?>
 <typesystem package="testbinding">
     <load-typesystem name="typesystem_core.xml" generate="no" />
+    <load-typesystem name="typesystem_gui.xml" generate="no"/>
     <object-type name="TestObject" />
     <object-type name="TestView" >
         <modify-function signature="TestView(QAbstractListModel*,QObject*)">