Gui: Added Gui.doc.view.viewer.setBackgroundColor() py method

src/Gui/View3DViewerPy.cpp

@@ -75,6 +75,8 @@ void View3DInventorViewerPy::init_type()
         "getPickRadius(): returns radius of confusion in pixels for picking objects on screen (selection).");
     add_varargs_method("setPickRadius", &View3DInventorViewerPy::setPickRadius,
         "setPickRadius(new_radius): sets radius of confusion in pixels for picking objects on screen (selection).");
+    add_varargs_method("setBackgroundColor", &View3DInventorViewerPy::setBackgroundColor,
+        "setBackgroundColor(r,g,b): sets the background color of the current viewer.");
     add_varargs_method("setRedirectToSceneGraph", &View3DInventorViewerPy::setRedirectToSceneGraph,
         "setRedirectToSceneGraph(bool): enables or disables to redirect events directly to the scene graph.");
     add_varargs_method("isRedirectedToSceneGraph", &View3DInventorViewerPy::isRedirectedToSceneGraph,
@@ -363,6 +365,28 @@ Py::Object View3DInventorViewerPy::setPickRadius(const Py::Tuple& args)
     }
 }
 
+Py::Object View3DInventorViewerPy::setBackgroundColor(const Py::Tuple& args)
+{
+    float r,g,b = 0.0;
+    if (!PyArg_ParseTuple(args.ptr(), "fff", &r, &g, &b)) {
+        throw Py::Exception();
+    }
+    try {
+        SbColor col(r,g,b);
+        _viewer->setGradientBackgroundColor(col,col);
+        return Py::None();
+    }
+    catch (const Base::Exception& e) {
+        throw Py::RuntimeError(e.what());
+    }
+    catch (const std::exception& e) {
+        throw Py::RuntimeError(e.what());
+    }
+    catch(...) {
+        throw Py::RuntimeError("Unknown C++ exception");
+    }
+}
+
 Py::Object View3DInventorViewerPy::setRedirectToSceneGraph(const Py::Tuple& args)
 {
     PyObject* m=Py_False;

src/Gui/View3DViewerPy.h

@@ -65,6 +65,7 @@ public:
     Py::Object getPickRadius(const Py::Tuple& args);
     Py::Object setPickRadius(const Py::Tuple& args);
 
+    Py::Object setBackgroundColor(const Py::Tuple& args);
     Py::Object setRedirectToSceneGraph(const Py::Tuple& args);
     Py::Object isRedirectedToSceneGraph(const Py::Tuple& args);