Gui: Implement PythonWrapper::fromQAction

QAction class resides in QtGui, so add its conversion method and
use it.

src/Gui/CommandActionPy.cpp

@@ -59,7 +59,7 @@ Py::Object CommandActionPy::getAction()
         PythonWrapper wrap;
         wrap.loadWidgetsModule();
 
-        return wrap.fromQObject(action->action());
+        return wrap.fromQAction(action->action());
     }
     else {
         return Py::None();

src/Gui/CommandPyImp.cpp

@@ -274,10 +274,10 @@ PyObject* CommandPy::getAction(PyObject *args)
         if (group) {
             const auto actions = group->actions();
             for (auto a : actions)
-                list.append(wrap.fromQObject(a));
+                list.append(wrap.fromQAction(a));
         }
         else if (action) {
-            list.append(wrap.fromQObject(action->action()));
+            list.append(wrap.fromQAction(action->action()));
         }
 
         return Py::new_reference_to(list);

src/Gui/PythonWrapper.cpp

@@ -640,6 +640,29 @@ QDir* PythonWrapper::toQDir(PyObject* pyobj)
     return qt_getCppType<QDir>(pyobj);
 }
 
+Py::Object PythonWrapper::fromQAction(QAction* action)
+{
+    if (!action) {
+        return Py::None();
+    }
+#if defined (HAVE_SHIBOKEN) && defined(HAVE_PYSIDE)
+    // Access shiboken/PySide via C++
+    auto type = getPyTypeObjectForTypeName<QAction>();
+    if (type) {
+        std::string typeName = action->metaObject()->className();
+        PyObject* pyobj = Shiboken::Object::newObject(type, action, false, false, typeName.c_str());
+        WrapperManager::instance().addQObject(action, pyobj);
+        return Py::asObject(pyobj);
+    }
+    throw Py::RuntimeError("Failed to wrap object");
+#else
+    // Access shiboken/PySide via Python
+
+    return qt_wrapInstance<QAction*>(action, action->metaObject()->className(), "QtGui");
+#endif
+
+}
+
 Py::Object PythonWrapper::fromQPrinter(QPrinter* printer)
 {
     if (!printer) {

src/Gui/PythonWrapper.h

@@ -29,6 +29,7 @@
 #include <FCGlobal.h>
 
 QT_BEGIN_NAMESPACE
+class QAction;
 class QDir;
 class QIcon;
 class QImage;
@@ -58,6 +59,7 @@ class GuiExport PythonWrapper
     QGraphicsObject* toQGraphicsObject(PyObject* pyPtr);
     QGraphicsObject* toQGraphicsObject(const Py::Object& pyObject);
 
+    Py::Object fromQAction(QAction*);
     Py::Object fromQPrinter(QPrinter*);
     Py::Object fromQObject(QObject*, const char* className=nullptr);
     Py::Object fromQWidget(QWidget*, const char* className=nullptr);