Fix BUG #1135 - "SIGSEGV when loading custom widget using QUiLoader..."bug1135

As PyCustomWidget::createWidget()'s caller is a thread which calls
the PyObject_CallObject() function it needs _exclusive_ access to the
Python interpreter so that a Shiboken::Gilstate is needed in order to
make it thread-safe and avoiding that other threads call the interpreter
at the same time.

See http://bugs.pyside.org/show_bug.cgi?id=1135.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>

3 files changed, 95 insertions, 0 deletions

diff --git a/tests/QtUiTools/CMakeLists.txt b/tests/QtUiTools/CMakeLists.txt
index 39e2e94..f187581 100644
--- a/tests/QtUiTools/CMakeLists.txt
+++ b/tests/QtUiTools/CMakeLists.txt
@@ -9,6 +9,7 @@ PYSIDE_TEST(bug_913.py)
 PYSIDE_TEST(bug_958.py)
 PYSIDE_TEST(bug_965.py)
 PYSIDE_TEST(bug_1060.py)
+PYSIDE_TEST(bug_1135.py)
 PYSIDE_TEST(bug_1138.py)
 PYSIDE_TEST(uiloader_test.py)
 PYSIDE_TEST(ui_test.py)
diff --git a/tests/QtUiTools/bug_1135.py b/tests/QtUiTools/bug_1135.py
new file mode 100644
index 0000000..4a82413
--- /dev/null
+++ b/tests/QtUiTools/bug_1135.py
@@ -0,0 +1,29 @@
+''' unit test for BUG #1135 '''
+''' see http://bugs.pyside.org/show_bug.cgi?id=1135 '''
+
+from PySide.QtCore import *
+from PySide.QtGui import *
+from PySide.QtUiTools import QUiLoader
+from helper import adjust_filename
+
+class CustomWidget(QFrame):
+    def __init__(self, parent=None):
+        super(CustomWidget, self).__init__(parent)
+        self.layout = QVBoxLayout()
+        self.label = QLabel("Custom widget")
+        self.layout.addWidget(self.label)
+        self.setLayout(self.layout)
+
+class CustomLoader(QUiLoader):
+    def __init__(self):
+        super(CustomLoader,self).__init__()
+
+    def createWidget(self, className, parent=None, name=""):
+        return super(CustomLoader, self).createWidget(className, parent, name)
+
+if __name__ == "__main__":
+    app = QApplication([])
+    loader = CustomLoader()
+    loader.registerCustomWidget(CustomWidget)
+    form = loader.load(adjust_filename("bug_1135.ui", __file__))
+    form.show()
diff --git a/tests/QtUiTools/bug_1135.ui b/tests/QtUiTools/bug_1135.ui
new file mode 100644
index 0000000..539fc17
--- /dev/null
+++ b/tests/QtUiTools/bug_1135.ui
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <item>
+    <widget class="QScrollArea" name="scrollArea">
+     <property name="widgetResizable">
+      <bool>true</bool>
+     </property>
+     <widget class="QWidget" name="scrollAreaWidgetContents">
+      <property name="geometry">
+       <rect>
+        <x>0</x>
+        <y>0</y>
+        <width>380</width>
+        <height>280</height>
+       </rect>
+      </property>
+      <layout class="QVBoxLayout" name="verticalLayout">
+       <item>
+        <widget class="QPushButton" name="pushButton">
+         <property name="text">
+          <string>Regular widget</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="CustomWidget" name="frame">
+         <property name="frameShape">
+          <enum>QFrame::StyledPanel</enum>
+         </property>
+         <property name="frameShadow">
+          <enum>QFrame::Raised</enum>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>CustomWidget</class>
+   <extends>QFrame</extends>
+   <header>customwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>