Improve CMake for IDE Projects (Visual Studio) (#13704)

cmake/sdlcommands.cmake

@@ -1,6 +1,21 @@
 add_library(SDL3-collector INTERFACE)
 add_library(SDL3_test-collector INTERFACE)
 
+function(sdl_source_group prefix_directory)
+  set(prefixed_list)
+  file(TO_CMAKE_PATH ${prefix_directory} normalized_prefix_path)
+  foreach(file in ${ARGN})
+    file(TO_CMAKE_PATH ${file} normalized_path)
+    string(FIND "${normalized_path}" ${normalized_prefix_path} position)
+    if("${position}" EQUAL 0)
+      list(APPEND prefixed_list ${file})
+    endif()
+  endforeach()
+  if(prefixed_list)
+    source_group(TREE ${prefix_directory} FILES ${prefixed_list})
+  endif()
+endfunction()
+
 # Use sdl_glob_sources to add glob sources to SDL3-shared, to SDL3-static, or to both.
 function(sdl_glob_sources)
   cmake_parse_arguments(ARGS "" "" "SHARED;STATIC" ${ARGN})
@@ -13,6 +28,7 @@ function(sdl_glob_sources)
   if(TARGET SDL3-static)
     target_sources(SDL3-static PRIVATE ${static_sources} ${both_sources})
   endif()
+  sdl_source_group(${PROJECT_SOURCE_DIR} ${shared_sources} ${shared_sources} ${both_sources})
   set_property(TARGET SDL3-collector APPEND PROPERTY INTERFACE_SOURCES ${shared_sources} ${static_sources} ${both_sources})
 endfunction()
 
@@ -25,6 +41,7 @@ function(sdl_sources)
   if(TARGET SDL3-static)
     target_sources(SDL3-static PRIVATE ${ARGS_STATIC} ${ARGS_UNPARSED_ARGUMENTS})
   endif()
+  sdl_source_group(${PROJECT_SOURCE_DIR} ${ARGS_SHARED} ${ARGS_STATIC} ${ARGS_UNPARSED_ARGUMENTS})
   set_property(TARGET SDL3-collector APPEND PROPERTY INTERFACE_SOURCES ${ARGS_SHARED} ${ARGS_STATIC} ${ARGS_UNPARSED_ARGUMENTS})
 endfunction()