gtk概述

GTK是一个小部件工具包。由GTK创建的每个用户界面都由小部件组成。这是在C中使用GObject实现的，这是一个面向对象的C框架。[]小部件被组织在一个层次结构中。窗口小部件是主容器。然后，通过向窗口中添加按钮、下拉菜单、输入字段和其他小部件来构建用户界面。
GTK是由事件驱动的。该工具包侦听事件，如单击按钮，并将事件传递给应用程序。

hello,world

#include <iostream>
#include <gtk/gtk.h>
using namespace std;

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

static void
activate (GtkApplication *app,
          gpointer        user_data)
{
  GtkWidget *window;
  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 = gtk_button_new_with_label ("Hello World");
  g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);
  gtk_window_set_child (GTK_WINDOW (window), button);

  gtk_window_present (GTK_WINDOW (window));
}

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

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

  return status;
}