Remove libnotify support; use Qt notifications

Drop libnotify integration and related build plumbing, simplify notification handling to use Qt only, and update docs/tests accordingly. Changes include: removed cmake/FindLibNotify.cmake and LibNotify detection/definitions from CMakeLists.txt; removed libnotify-dependent code paths, async threads, and notification bookkeeping from src/tray_qt.cpp and unused includes; simplified notify logic to always use QtTrayMenu; updated README to remove libnotify from platform dependency lists and simplified the icons table; and adjusted a unit test comment to reflect the new Qt-based callback behavior. Overall this removes the external libnotify dependency and cleans up associated code and build configuration.

Author: ReenigneArcher

CMakeLists.txt

@@ -33,8 +33,6 @@ option(BUILD_EXAMPLE "Build example app" ${TRAY_IS_TOP_LEVEL})
 set(CMAKE_COLOR_MAKEFILE ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-find_package(PkgConfig)
-
 file(GLOB TRAY_SOURCES
         "${CMAKE_CURRENT_SOURCE_DIR}/src/*.h"
 )
@@ -88,16 +86,6 @@ list(APPEND TRAY_SOURCES
         "${CMAKE_CURRENT_SOURCE_DIR}/src/QtTrayMenu.cpp"
 )
 
-if(UNIX AND NOT APPLE)
-    find_package(LibNotify)
-    if(LIBNOTIFY_FOUND)
-        list(APPEND TRAY_COMPILE_DEFINITIONS TRAY_USE_LIBNOTIFY=1)
-        list(APPEND TRAY_EXTERNAL_LIBRARIES ${LIBNOTIFY_LIBRARIES})
-        list(APPEND TRAY_EXTERNAL_DIRECTORIES ${LIBNOTIFY_LIBRARY_DIRS})
-        list(APPEND TRAY_EXTERNAL_INCLUDES ${LIBNOTIFY_INCLUDE_DIRS})
-    endif()
-endif()
-
 add_library(${PROJECT_NAME} STATIC ${TRAY_SOURCES})
 set_property(TARGET ${PROJECT_NAME} PROPERTY C_STANDARD 99)
 set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 17)
@@ -116,24 +104,10 @@ else()
     list(APPEND TRAY_EXTERNAL_LIBRARIES Qt5::Widgets Qt5::Svg)
 endif()
 
-if(TRAY_EXTERNAL_INCLUDES)
-    target_include_directories(${PROJECT_NAME}
-            SYSTEM PRIVATE
-            ${TRAY_EXTERNAL_INCLUDES})
-endif()
-
 if(TRAY_COMPILE_DEFINITIONS)
     target_compile_definitions(${PROJECT_NAME} PRIVATE ${TRAY_COMPILE_DEFINITIONS})
 endif()
 
-if(TRAY_EXTERNAL_DIRECTORIES)
-    foreach(tray_external_directory IN LISTS TRAY_EXTERNAL_DIRECTORIES)
-        if(tray_external_directory)
-            target_link_directories(${PROJECT_NAME} PRIVATE "${tray_external_directory}")
-        endif()
-    endforeach()
-endif()
-
 add_library(tray::tray ALIAS ${PROJECT_NAME})
 
 if(TRAY_IS_TOP_LEVEL AND BUILD_EXAMPLE)

README.md

@@ -46,35 +46,35 @@ This fork adds the following features:
 
 ### Platform Dependencies
 
-Install either Qt6 _or_ Qt5. Linux builds can also use libnotify when the development package is available.
+Install either Qt6 _or_ Qt5.
 
 <div class="tabbed">
 
 - <b class="tab-title">Arch</b>
     ```bash
     # Qt6
-    sudo pacman -S qt6-base qt6-svg libnotify
+    sudo pacman -S qt6-base qt6-svg
 
     # Qt5
-    sudo pacman -S qt5-base qt5-svg libnotify
+    sudo pacman -S qt5-base qt5-svg
     ```
 
 - <b class="tab-title">Debian/Ubuntu</b>
     ```bash
     # Qt6
-    sudo apt install qt6-base-dev qt6-svg-dev libnotify-dev
+    sudo apt install qt6-base-dev qt6-svg-dev
 
     # Qt5
-    sudo apt install qtbase5-dev libqt5svg5-dev libnotify-dev
+    sudo apt install qtbase5-dev libqt5svg5-dev
     ```
 
 - <b class="tab-title">Fedora</b>
     ```bash
     # Qt6
-    sudo dnf install qt6-qtbase-devel qt6-qtsvg-devel libnotify-devel
+    sudo dnf install qt6-qtbase-devel qt6-qtsvg-devel
 
     # Qt5
-    sudo dnf install qt5-qtbase-devel qt5-qtsvg-devel libnotify-devel
+    sudo dnf install qt5-qtbase-devel qt5-qtsvg-devel
     ```
 
 - <b class="tab-title">macOS</b>
@@ -133,14 +133,13 @@ The `icon` and `notification_icon` fields can be a path to an image file or an i
 are resolved from the process working directory, so applications should copy or install icon files where the running
 process can find them.
 
-| Component                                                                              | Backend                                               | Supported inputs                   | Notes                                                                                                                                                                                       |
-|----------------------------------------------------------------------------------------|-------------------------------------------------------|------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| Tray icon (`icon`)                                                                     | Qt `QSystemTrayIcon` / `QIcon` on all platforms       | SVG, ICO, PNG, Qt theme icon names | Loaded through Qt's `QIcon` path; SVG, ICO, and PNG are tested. Theme icon names are resolved by Qt when the platform/theme supports them.                                                  |
-| Notification icon (`notification_icon`) on Windows, macOS, and Linux without libnotify | Qt `QSystemTrayIcon::showMessage` / `QIcon`           | SVG, ICO, PNG, Qt theme icon names | Loaded through Qt's `QIcon` path; SVG, ICO, and PNG are tested. Theme icon names are resolved by Qt when the platform/theme supports them.                                                  |
-| Notification icon (`notification_icon`) on Linux with libnotify                        | libnotify / freedesktop notification server           | SVG, PNG, or icon theme name       | libnotify accepts an icon theme name or filename, but the notification server and installed image loaders decide which file formats render. Do not rely on ICO for libnotify notifications. |
+| Component                               | Backend                                                      | Supported inputs                   | Notes                                                                                                                                      |
+|-----------------------------------------|--------------------------------------------------------------|------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
+| Tray icon (`icon`)                      | Qt `QSystemTrayIcon` / `QIcon` on all platforms              | SVG, ICO, PNG, Qt theme icon names | Loaded through Qt's `QIcon` path; SVG, ICO, and PNG are tested. Theme icon names are resolved by Qt when the platform/theme supports them. |
+| Notification icon (`notification_icon`) | Qt `QSystemTrayIcon::showMessage` / `QIcon` on all platforms | SVG, ICO, PNG, Qt theme icon names | Loaded through Qt's `QIcon` path; SVG, ICO, and PNG are tested. Theme icon names are resolved by Qt when the platform/theme supports them. |
 
 For the most predictable cross-platform behavior, use SVG or PNG files for both tray and notification icons. ICO is
-supported by the Qt-backed paths tested by this project, but it is not portable for libnotify notifications.
+supported by the Qt-backed paths tested by this project.
 Qt theme icons should be passed as icon name strings, such as `mail-message-new`.
 
 ## API