[代碼實例][gtk+]創建按鈕

#include <gtk/gtk.h>

static void activate(GtkApplication * app, gpointer user_date);
static void print_hello(GtkWidget *widget, gpointer data);

int main(int argc, char * argv[])
{
    GtkApplication * app;
    int status;

    app = gtk_application_new("org.gtk.example", G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);

    return status;
}

static void activate(GtkApplication * app, gpointer user_date)
{
    GtkWidget * window;
    GtkWidget * button_box;
    GtkWidget * button;

    window = gtk_application_window_new(app);
    gtk_window_set_title(GTK_WINDOW(window), "Window");
    gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

    button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
    gtk_container_add(GTK_CONTAINER(window), button_box);

    button = gtk_button_new_with_label("Hello World");
    g_signal_connect(button, "clicked", G_CALLBACK(print_hello), NULL);
    g_signal_connect_swapped(button, "clicked", G_CALLBACK(gtk_widget_destroy), window);
    gtk_container_add(GTK_CONTAINER(button_box), button);

    gtk_widget_show_all(window);
}

static void print_hello(GtkWidget *widget, gpointer data)
{
    g_print("Hello World\n");
}

Makefile:

main: main.c
    gcc main.c -o main `pkg-config --cflags --libs gtk+-3.0`