Move source code into include/ and src/ directories

Author: ChrisThrasher

CMakeLists.txt

@@ -63,11 +63,11 @@ find_package(OpenGL REQUIRED)
 include(GNUInstallDirs)
 
 # Define ImGui-SFML
-add_library(ImGui-SFML imgui-SFML.cpp ${IMGUI_SOURCES})
+add_library(ImGui-SFML src/imgui-SFML.cpp ${IMGUI_SOURCES})
 add_library(ImGui-SFML::ImGui-SFML ALIAS ImGui-SFML)
 target_include_directories(ImGui-SFML PUBLIC
   $<BUILD_INTERFACE:${IMGUI_INCLUDE_DIR}>
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 target_link_libraries(ImGui-SFML PUBLIC SFML::Graphics OpenGL::GL)
@@ -92,7 +92,7 @@ if(IMGUI_SFML_ENABLE_WARNINGS)
   endif()
 endif()
 foreach(WARNING ${IMGUI_SFML_WARNINGS})
-  set_property(SOURCE imgui-SFML.cpp APPEND_STRING PROPERTY COMPILE_FLAGS " ${WARNING}")
+  set_property(SOURCE src/imgui-SFML.cpp APPEND_STRING PROPERTY COMPILE_FLAGS " ${WARNING}")
 endforeach()
 
 # Specify ImGui user config