refactor: MainWindow class into multiple items / controllers ; fix: Bug with PlaylistBrowserDialog.cpp : List item "No playlists available" was selectable

CMakeLists.txt

@@ -1,70 +1,64 @@
 cmake_minimum_required(VERSION 3.22)
 project(SubWave LANGUAGES CXX)
-
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
-
 # dependencies
 find_package(Qt6 REQUIRED COMPONENTS
     Core Widgets Multimedia OpenGL OpenGLWidgets
 )
-
 find_package(PkgConfig REQUIRED)
-
 pkg_check_modules(FFMPEG REQUIRED IMPORTED_TARGET
     libavformat
     libavcodec
     libavutil
     libswresample
 )
-
 pkg_check_modules(FFTW REQUIRED IMPORTED_TARGET fftw3)
-
 # sources
 set(SOURCES
     src/main.cpp
     src/config/Config.cpp
-
     src/gui/CoverArtWidget.cpp
     src/gui/SpectrogramWidget.cpp
     src/gui/GradientDialog.cpp
     src/gui/EqualizerWidget.cpp
     src/gui/TrackDelegate.cpp
     src/gui/MainWindow.cpp
-
+    src/gui/NowPlayingPanel.cpp
+    # controllers
+    src/controllers/PlaybackController.cpp
+    src/controllers/LibraryController.cpp
     # engine
     src/engine/AudioEngine.cpp
     src/engine/EqProcessor.cpp
     src/engine/SpectrumAnalyzer.cpp
     src/engine/MusicLibrary.cpp
     src/engine/MetadataReader.cpp
-
     # ffmpeg
     src/engine/ffmpeg/FormatContext.cpp
     src/engine/ffmpeg/CodecContext.cpp
     src/engine/ffmpeg/Resampler.cpp
     src/engine/ffmpeg/FFmpegDecoder.cpp
-
     # playlists
     src/playlists/PlaylistModel.cpp
     src/playlists/PlaylistManager.cpp
     src/playlists/PlaylistCreatorDialog.cpp
     src/playlists/PlaylistBrowserDialog.cpp
 )
-
 set(HEADERS
     src/config/Config.h
-
     src/gui/CoverArtWidget.h
     src/gui/SpectrogramWidget.h
     src/gui/GradientDialog.h
     src/gui/EqualizerWidget.h
     src/gui/TrackDelegate.h
     src/gui/MainWindow.h
-
+    src/gui/NowPlayingPanel.h
+    # controllers
+    src/controllers/PlaybackController.h
+    src/controllers/LibraryController.h
     # engine
     src/engine/AudioEngine.h
     src/engine/EqProcessor.h
@@ -73,50 +67,43 @@ set(HEADERS
     src/engine/Track.h
     src/engine/MetadataReader.h
     src/engine/MusicLibrary.h
-
     # ffmpeg wrapper
     src/engine/ffmpeg/FormatContext.h
     src/engine/ffmpeg/CodecContext.h
     src/engine/ffmpeg/Resampler.h
     src/engine/ffmpeg/FFmpegDecoder.h
-
     # playlists
     src/playlists/PlaylistModel.h
     src/playlists/PlaylistManager.h
     src/playlists/PlaylistCreatorDialog.h
     src/playlists/PlaylistBrowserDialog.h
 )
-
 # qrc resources
 set(RESOURCES
     src/shaders.qrc
     src/application.qrc
 )
-
 # target
 add_executable(SubWave ${SOURCES} ${HEADERS} ${RESOURCES})
-
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
     message(STATUS "Setting build type to 'RelWithDebInfo' as none was specified.")
     set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build." FORCE)
 endif()
-
 if(MSVC)
     target_compile_options(SubWave PRIVATE /O2 /fp:fast)
 else()
     target_compile_options(SubWave PRIVATE -O3 -ffast-math -march=native)
 endif()
-
 # headers
 target_include_directories(SubWave PRIVATE
     src
     src/config
+    src/controllers
     src/engine
     src/engine/ffmpeg
     src/playlists
     src/gui
 )
-
 # link to qt and ffmpeg and fftw
 target_link_libraries(SubWave PRIVATE
     Qt6::Core
@@ -127,7 +114,6 @@ target_link_libraries(SubWave PRIVATE
     PkgConfig::FFMPEG
     PkgConfig::FFTW
 )
-
 # For windows stupid ahh
 if(WIN32)
     set_target_properties(SubWave PROPERTIES WIN32_EXECUTABLE TRUE)