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Module 14: GTK4 GUI Programming

Create graphical user interfaces with GTK4!

What You'll Learn

  1. Introduction to GTK4
  2. Setting up GTK4 development
  3. Creating windows and widgets
  4. Event handling
  5. Building simple GUI applications

Basic GTK4 Window

#include <gtk/gtk.h>

static void on_activate(GtkApplication *app) {
 GtkWidget *window = gtk_application_window_new(app);
 gtk_window_set_title(GTK_WINDOW(window), "Hello GTK4");
 gtk_window_set_default_size(GTK_WINDOW(window), 400, 300);

 GtkWidget *label = gtk_label_new("Hello, World!");
 gtk_window_set_child(GTK_WINDOW(window), label);

 gtk_window_present(GTK_WINDOW(window));
}

int main(int argc, char **argv) {
 GtkApplication *app = gtk_application_new("com.example.app",
 G_APPLICATION_DEFAULT_FLAGS);
 g_signal_connect(app, "activate", G_CALLBACK(on_activate), NULL);
 int status = g_application_run(G_APPLICATION(app), argc, argv);
 g_object_unref(app);
 return status;
}

Button with Callback

static void on_button_clicked(GtkButton *button, gpointer data) {
 g_print("Button clicked!\n");
}

GtkWidget *button = gtk_button_new_with_label("Click Me");
g_signal_connect(button, "clicked", G_CALLBACK(on_button_clicked), NULL);

Building

gcc $(pkg-config --cflags gtk4) -o myapp myapp.c $(pkg-config --libs gtk4)

Next Module

Module 15: Game Development Projects