init

.gitignore

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+.idea
+cmake-*

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.30)
+project(LearnGtk4 LANGUAGES CXX)
+
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTKMM4 REQUIRED IMPORTED_TARGET gtkmm-4.0)
+
+find_program(CCACHE_FOUND ccache)
+if (CCACHE_FOUND)
+    message(STATUS "ccache found !")
+    set_property(GLOBAL PROPERTY C_COMPILER_LAUNCHER ccache)
+    set_property(GLOBAL PROPERTY C_LINKER_LAUNCHER ccache)
+    set_property(GLOBAL PROPERTY CXX_COMPILER_LAUNCHER ccache)
+    set_property(GLOBAL PROPERTY CXX_LINKER_LAUNCHER ccache)
+else ()
+    message(STATUS "ccache not found")
+endif ()
+
+set(COMPILE_FLAGS
+        -pipe
+        -march=znver3 # change to native or your architecture.
+        -mtune=znver3 # same as above
+        -mrdseed # be careful about this, this is linked to the x86 architecture.
+        -mrdrnd # same as above
+        -Wall
+        -Wextra
+        -Wpedantic
+        -pedantic
+        $<$<CONFIG:Release>:-ffunction-sections -fdata-sections>
+        -fuse-ld=gold
+        -funroll-loops
+        -fdevirtualize-at-ltrans
+)
+set(LINKER_OPTIONS
+        -Wl,--sort-common,--as-needed$<$<CONFIG:Release>:,--gc-sections,--strip-all>
+        -fuse-ld=gold
+        -fdevirtualize-at-ltrans
+)
+
+option(ENABLE_COVERAGE "Enabling coverage" OFF)
+
+if (${ENABLE_COVERAGE})
+    message(STATUS "Coverage enabled")
+    list(APPEND COMPILE_FLAGS --coverage)
+    list(APPEND LINKER_OPTIONS --coverage)
+    list(APPEND LINKER_FLAGS gcov)
+endif ()
+
+add_executable(LearnGtk4 main.cpp
+        hello_world.cpp
+        hello_world.hpp)
+
+set_target_properties(LearnGtk4 PROPERTIES
+        CXX_STANDARD 20
+        CXX_STANDARD_REQUIRED ON
+        CXX_EXTENSIONS OFF
+        INTERPROCEDURAL_OPTIMIZATION ON
+        UNITY_BUILD ON
+)
+
+target_compile_definitions(LearnGtk4 PUBLIC $<$<CONFIG:Debug>:_GLIBCXX_DEBUG>)
+target_compile_options(LearnGtk4 PUBLIC ${COMPILE_OPTIONS})
+target_link_options(LearnGtk4 PUBLIC ${LINKER_OPTIONS})
+target_link_libraries(LearnGtk4 PkgConfig::GTKMM4)

hello_world.cpp

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+//
+// Created by postaron on 27/09/24.
+//
+
+#include "hello_world.hpp"
+#include <iostream>
+
+namespace learn_gtkmm4 {
+    HelloWorld::HelloWorld() : m_button("Hello world!") {
+        set_title("Hello world!");
+        set_default_size(720, 1280);
+        add_action("Open");
+        add_action("Quit");
+        set_show_menubar();
+        m_button.set_margin(10);
+        m_button.signal_clicked().connect(sigc::mem_fun(*this, &HelloWorld::on_button_clicked));
+        set_child(m_button);
+    }
+
+    void HelloWorld::on_button_clicked() {
+        std::cout << "Hello World" << std::endl;
+    }
+} // learn_gtkmm4

hello_world.hpp

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+//
+// Created by postaron on 27/09/24.
+//
+
+#ifndef LEARNGTK4_HELLO_WORLD_HPP
+#define LEARNGTK4_HELLO_WORLD_HPP
+
+#include <gtkmm/button.h>
+#include <gtkmm/glarea.h>
+#include <gtkmm/box.h>
+#include <gtkmm/applicationwindow.h>
+
+namespace learn_gtkmm4 {
+
+    class HelloWorld : public Gtk::ApplicationWindow {
+    public:
+        HelloWorld();
+        ~HelloWorld() override = default;
+
+    protected:
+        void on_button_clicked();
+
+        Gtk::Box m_VBox;
+        Gtk::Button m_button;
+        Gtk::GLArea gl_area;
+    };
+
+} // learn_gtkmm4
+
+#endif //LEARNGTK4_HELLO_WORLD_HPP

main.cpp

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+#include "hello_world.hpp"
+#include <gtkmm/application.h>
+
+int main(int argc, char *argv[]) {
+    auto app = Gtk::Application::create("org.gtkmm.example");
+    return app->make_window_and_run<learn_gtkmm4::HelloWorld>(argc, argv);
+}