#11 : Implement Light and Dark Theme System (#12)

- Use latest TGUI version
- Add light theme
- New class ThemeManager with system theme detection.
- Refactor components for using theme instead of hardcoded colors
- Add some rules in .editorconfig and fix some style guide issues

Author: leo7418

.editorconfig

@@ -5,7 +5,34 @@ end_of_line = lf
 insert_final_newline = true
 
 [*.{c++,cc,cpp,cxx,h,h++,hh,hpp,hxx,inl,ipp,tlh,tli}]
-cpp_indent_case_contents_when_block = true
-cpp_new_line_before_open_brace_namespace = same_line
 indent_size = 4
 indent_style = space
+
+# Braces and new lines
+cpp_new_line_before_open_brace_namespace = same_line
+cpp_new_line_before_open_brace_type = same_line
+cpp_new_line_before_open_brace_function = same_line
+cpp_new_line_before_open_brace_block = same_line
+cpp_new_line_before_open_brace_lambda = same_line
+cpp_new_line_before_else = false
+cpp_new_line_before_catch = false
+
+# Pointers and references
+cpp_space_pointer_reference_alignment = right
+
+# General spacing
+cpp_space_before_function_open_parenthesis = never
+cpp_space_after_keywords_in_control_flow_statements = true
+cpp_space_within_control_flow_statement_parentheses = false
+cpp_space_before_block_open_brace = true
+cpp_space_after_comma = true
+cpp_space_before_comma = false
+cpp_space_within_initializer_list_braces = false
+
+# Indentation
+cpp_indent_case_contents_when_block = true
+cpp_indent_namespace_contents = true
+cpp_indent_lambda_braces_when_parameter = false
+cpp_indent_multi_line_relative_to = statement_begin
+cpp_indent_within_parentheses = indent
+cpp_indent_preserve_within_parentheses = true

CMakeLists.txt

@@ -60,6 +60,7 @@ add_executable(file-share
   source/main.cpp
   source/Application.cpp
   source/Debug.cpp
+  source/ThemeManager.cpp
   source/Components/Button.cpp
   source/Components/Foldout.cpp
   source/Components/InputFileDialog.cpp
@@ -70,6 +71,14 @@ add_executable(file-share
 
 target_compile_definitions(file-share PRIVATE _LARGEFILE_SOURCE _FILE_OFFSET_BITS=64)
 target_link_libraries(file-share tgui sfml-graphics sfml-window sfml-system sqlite_orm::sqlite_orm fsp)
+
+# Platform-specific libraries for theme detection
+if(APPLE)
+    target_link_libraries(file-share "-framework CoreFoundation")
+elseif(WIN32)
+    target_link_libraries(file-share winreg)
+endif()
+
 target_compile_options(file-share PRIVATE
   $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:-Wall -Wextra>
   $<$<CXX_COMPILER_ID:MSVC>:/W4>