add Qt viewport

app/gcompose/CMakeLists.txt

@@ -1,5 +1,15 @@
 
-add_executable(gcompose src/main.cpp)
+add_executable(gcompose 
+    src/main.cpp
+    src/MainWindow.h
+    src/MainWindow.cpp
+)
+
+set_target_properties(gcompose PROPERTIES
+    AUTOMOC ON
+    AUTOUIC ON
+    AUTORCC ON
+)
 
 target_include_directories(gcompose PRIVATE 
     ${SRC_DIR}
@@ -8,13 +18,21 @@ target_include_directories(gcompose PRIVATE
     ${VTK_INCLUDE_DIRS}
 )
 
+# Filter Geant4 libraries to remove Qt-dependent ones
+set(Geant4_LIBS_FILTERED ${Geant4_LIBRARIES})
+if(Geant4_LIBS_FILTERED)
+    list(REMOVE_ITEM Geant4_LIBS_FILTERED Geant4::G4interfaces Geant4::G4OpenGL Geant4::G4visQt3D)
+endif()
+
 target_link_libraries(gcompose
     mutomCore
     mutomMath
     mutomGeant
     mutomVtk
-    ${Geant4_LIBRARIES}
+    ${Geant4_LIBS_FILTERED}
     ${VTK_LIBRARIES}
+    Qt6::Widgets
+    VTK::GUISupportQt
 )
 
 install(TARGETS gcompose RUNTIME DESTINATION bin)