[SofaImGui] add python3-loadable module (#95)

* add imgui as a py3 loadable module

* fix typo

SofaImGui/CMakeLists.txt

@@ -103,6 +103,11 @@ target_link_libraries(${PROJECT_NAME} PUBLIC SofaGLFW Sofa.GL.Component.Renderin
 set_target_properties(nfd PROPERTIES LINKER_LANGUAGE CXX)
 target_link_libraries(${PROJECT_NAME} PRIVATE nfd glfw)
 
+find_package(SofaPython3 QUIET)
+if(SofaPython3_FOUND)
+    add_subdirectory(bindings)
+endif()
+
 sofa_create_package_with_targets(
     PACKAGE_NAME ${PROJECT_NAME}
     PACKAGE_VERSION ${Sofa_VERSION}

SofaImGui/bindings/CMakeLists.txt

@@ -0,0 +1,20 @@
+project(Bindings_SofaImGui)
+
+set(SOURCE_FILES
+    ${CMAKE_CURRENT_SOURCE_DIR}/Module_SofaImGui.cpp
+)
+
+if (NOT TARGET SofaPython3::Plugin)
+    find_package(SofaPython3 REQUIRED COMPONENTS SofaImGui Bindings.Sofa)
+endif()
+
+SP3_add_python_module(
+    TARGET       ${PROJECT_NAME}
+    PACKAGE      SofaImGui
+    MODULE       SofaImGui
+    DESTINATION  /
+    SOURCES      ${SOURCE_FILES}
+    DEPENDS      SofaPython3::Plugin SofaPython3::Bindings.Sofa SofaImGui
+
+)
+message("-- SofaPython3 bindings for SofaImGui will be created.")

SofaImGui/bindings/Module_SofaImGui.cpp

@@ -0,0 +1,36 @@
+/******************************************************************************
+*                 SOFA, Simulation Open-Framework Architecture                *
+*                    (c) 2021 INRIA, USTL, UJF, CNRS, MGH                     *
+*                                                                             *
+* This program is free software; you can redistribute it and/or modify it     *
+* under the terms of the GNU Lesser General Public License as published by    *
+* the Free Software Foundation; either version 2.1 of the License, or (at     *
+* your option) any later version.                                             *
+*                                                                             *
+* This program is distributed in the hope that it will be useful, but WITHOUT *
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       *
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License *
+* for more details.                                                           *
+*                                                                             *
+* You should have received a copy of the GNU Lesser General Public License    *
+* along with this program. If not, see <http://www.gnu.org/licenses/>.        *
+*******************************************************************************
+* Contact information: [email protected]                             *
+******************************************************************************/
+
+#include <pybind11/pybind11.h>
+
+#include <SofaImGui/init.h>
+
+
+namespace py { using namespace pybind11; }
+
+namespace sofaimgui::python3
+{
+
+PYBIND11_MODULE(SofaImGui, m)
+{
+    sofaimgui::init();
+}
+
+} // namespace sofaimgui::python3

SofaImGui/src/SofaImGui/ImGuiGUI.cpp

@@ -49,8 +49,11 @@ sofa::gui::common::BaseGUI* ImGuiGUI::CreateGUI(const char* name, sofa::simulati
     {
         return nullptr;
     }
-
-    gui->setScene(groot, filename);
+
+    if(groot)
+    {
+        gui->setScene(groot, filename);
+    }
 
     return gui;
 }