From eaf2c7094b023e13575c8357c01ed6e8041f096a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Poizl?= <nou.spiro@gmail.com>
Date: Wed, 20 Dec 2023 11:21:46 +0100
Subject: [PATCH] Migrate to Qt6

---
 CMakeLists.txt        | 9 +++------
 README                | 8 ++++----
 imagescrollareagl.cpp | 3 ++-
 mainwindow.cpp        | 1 +
 4 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2756ff3..df99912 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ if(SANITIZE_ADDRESS_LEAK)
     set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fsanitize=address -fsanitize=leak")
 endif(SANITIZE_ADDRESS_LEAK)
 
-find_package(Qt5 COMPONENTS Widgets Sql OpenGL REQUIRED)
+find_package(Qt6 COMPONENTS Widgets Sql OpenGLWidgets REQUIRED)
 find_library(GSL_LIB gsl REQUIRED)
 find_library(GSLCBLAS_LIB gslcblas REQUIRED)
 find_library(EXIF_LIB exif REQUIRED)
@@ -52,15 +52,12 @@ set(TENMON_SRC
 )
 
 option(COLOR_MANAGMENT "Enable sRGB framebuffer support for gamma correct images and color profiles support" ON)
-if(${Qt5Core_VERSION_STRING} VERSION_LESS "5.14")
-    set(COLOR_MANAGMENT OFF)
-endif(${Qt5Core_VERSION_STRING} VERSION_LESS "5.14")
 
 if(COLOR_MANAGMENT)
     add_compile_definitions("COLOR_MANAGMENT")
 endif(COLOR_MANAGMENT)
 
-qt5_add_resources(TENMON_SRC resources.qrc)
+qt_add_resources(TENMON_SRC resources.qrc)
 if(WIN32)
     list(APPEND TENMON_SRC icon.rc)
     set(tenmon_ICON "")
@@ -82,7 +79,7 @@ if(UNIX AND NOT APPLE)
     target_include_directories(tenmon PRIVATE ${GIO_INCLUDE_DIRS})
 endif()
 
-target_link_libraries(tenmon Qt5::Widgets Qt5::Sql ${GSL_LIB} ${GSLCBLAS_LIB} ${EXIF_LIB} ${FITS_LIB} ${RAW_LIB} ${WCS_LIB} XISF)
+target_link_libraries(tenmon Qt6::Widgets Qt6::Sql Qt6::OpenGLWidgets ${GSL_LIB} ${GSLCBLAS_LIB} ${EXIF_LIB} ${FITS_LIB} ${RAW_LIB} ${WCS_LIB} XISF)
 if(APPLE)
     target_link_libraries(tenmon "-framework CoreFoundation")
 else()
diff --git a/README b/README
index 627acf1..0623efb 100644
--- a/README
+++ b/README
@@ -2,20 +2,20 @@ FITS/XISF image viewer with multithreaded image loading
 
 To get all dependencies install these packages
 
-    sudo apt install qtbase5-dev libraw-dev libexif-dev libcfitsio-dev libgsl-dev wcslib-dev libopencv-dev cmake
+    sudo apt install qt6-base-dev libqt6opengl6-dev libraw-dev libexif-dev libcfitsio-dev libgsl-dev wcslib-dev cmake
 
 on OpenSUSE
 
-    sudo zypper install opencv-devel gsl-devel exif-devel libraw-devel wcslib-devel libqt5-qtbase-devel
+    sudo zypper install gsl-devel exif-devel libraw-devel wcslib-devel libqt6-qtbase-devel
 
 MacOS X
 
 To compile on MacOS install XCode first. Then install homebrew in x86_64 mode
 with "arch -i x86_64". Building on native ARM is not supported.
 
-    homebrew install qt5 libraw cfitsio libexif libgsl wcslib opencv
+    homebrew install qt6 libraw cfitsio libexif libgsl wcslib
 
-You may need to set CMAKE_PREFIX_PATH for Qt5 and OpenCV so CMake can find them.
+You may need to set CMAKE_PREFIX_PATH for Qt6 so CMake can find them.
 
 Then to build run standard cmake
 
diff --git a/imagescrollareagl.cpp b/imagescrollareagl.cpp
index 575aa0e..47e952e 100644
--- a/imagescrollareagl.cpp
+++ b/imagescrollareagl.cpp
@@ -1,5 +1,6 @@
 #include "imagescrollareagl.h"
 #include <QOpenGLFunctions>
+#include <QOpenGLVersionFunctionsFactory>
 #include <QDebug>
 #include <QKeyEvent>
 #include <QOpenGLDebugLogger>
@@ -400,7 +401,7 @@ void ImageWidget::initializeGL()
 {
     f = context()->functions();
     f->glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
-    f3 = context()->versionFunctions<QOpenGLFunctions_3_3_Core>();
+    f3 = QOpenGLVersionFunctionsFactory::get<QOpenGLFunctions_3_3_Core>(context());
 
     if(f3 == nullptr)
         QMessageBox::critical(this, tr("OpenGL error"), tr("Could not initialize OpenGL 3.3 context. Ensure that proper GPU driver is installed."));
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 9df671f..f170929 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -10,6 +10,7 @@
 #include <QProgressDialog>
 #include <QDebug>
 #include <QDockWidget>
+#include <QActionGroup>
 #include <signal.h>
 #include <unistd.h>
 #include <QSettings>