Core: support to load old project files containing image planes

See forum: https://forum.freecad.org/viewtopic.php?p=670545#p670545

src/App/Application.cpp

@@ -217,6 +217,18 @@ init_freecad_module(void)
     return PyModule_Create(&FreeCADModuleDef);
 }
 
+PyMODINIT_FUNC
+init_image_module()
+{
+    static struct PyModuleDef ImageModuleDef = {
+        PyModuleDef_HEAD_INIT,
+        "Image", "", -1,
+        nullptr,
+        nullptr, nullptr, nullptr, nullptr
+    };
+    return PyModule_Create(&ImageModuleDef);
+}
+
 Application::Application(std::map<std::string,std::string> &mConfig)
   : _mConfig(mConfig), _pActiveDoc(nullptr), _isRestoring(false),_allowPartial(false)
   , _isClosingAll(false), _objCount(-1), _activeTransactionID(0)
@@ -254,6 +266,10 @@ void Application::setupPythonTypes()
     };
     PyObject* pConsoleModule = PyModule_Create(&ConsoleModuleDef);
 
+    // fake Image module
+    PyObject* imageModule = init_image_module();
+    PyDict_SetItemString(modules, "Image", imageModule);
+
     // introducing additional classes
 
     // NOTE: To finish the initialization of our own type objects we must
@@ -2054,7 +2070,7 @@ void Application::initTypes()
     App::DocumentObjectGroup       ::init();
     App::DocumentObjectGroupPython ::init();
     App::DocumentObjectFileIncluded::init();
-    App::ImagePlane                ::init();
+    Image::ImagePlane              ::init();
     App::InventorObject            ::init();
     App::VRMLObject                ::init();
     App::Annotation                ::init();

src/App/ImagePlane.cpp

@@ -25,18 +25,18 @@
 #include "ImagePlane.h"
 
 
-using namespace App;
+using namespace Image;
 
-PROPERTY_SOURCE(App::ImagePlane, App::GeoFeature)
+PROPERTY_SOURCE(Image::ImagePlane, App::GeoFeature)
 
 
 ImagePlane::ImagePlane()
     : XPixelsPerMeter{1000.0}
     , YPixelsPerMeter{1000.0}
 {
-    ADD_PROPERTY_TYPE( ImageFile,(nullptr)  , "ImagePlane",Prop_None,"File of the image");
-    ADD_PROPERTY_TYPE( XSize,    (100), "ImagePlane",Prop_None,"Size of a pixel in X");
-    ADD_PROPERTY_TYPE( YSize,    (100), "ImagePlane",Prop_None,"Size of a pixel in Y");
+    ADD_PROPERTY_TYPE( ImageFile,(nullptr)  , "ImagePlane",App::Prop_None,"File of the image");
+    ADD_PROPERTY_TYPE( XSize,    (100), "ImagePlane",App::Prop_None,"Size of a pixel in X");
+    ADD_PROPERTY_TYPE( YSize,    (100), "ImagePlane",App::Prop_None,"Size of a pixel in Y");
 }
 
 int ImagePlane::getXSizeInPixel()

src/App/ImagePlane.h

@@ -27,12 +27,12 @@
 #include <App/PropertyFile.h>
 #include <App/PropertyUnits.h>
 
-namespace App
+namespace Image
 {
 
 class AppExport ImagePlane : public App::GeoFeature
 {
-    PROPERTY_HEADER_WITH_OVERRIDE(App::ImagePlane);
+    PROPERTY_HEADER_WITH_OVERRIDE(Image::ImagePlane);
 
 public:
     /// Constructor
@@ -57,7 +57,7 @@ public:
     }
 };
 
-} //namespace App
+} //namespace Image
 
 
 #endif // App_ImagePlane_H