<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="button.c" xml:lang="ko">

  <info>

    <title type="text">Button(C)</title>

    <link type="guide" xref="c#buttons"/>

    <link type="seealso" xref="dialog.c"/>

    <link type="seealso" xref="grid.c"/>

    <revision version="0.2" date="2012-06-22" status="draft"/>

    <credit type="author copyright">

      <name>Monica Kochofar</name>

      <email its:translate="no">monicakochofar@gmail.com</email>

      <years>2012</years>

    </credit>

    <desc>눌렀을 때 시그널을 내보내는 단추 위젯입니다</desc>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>조성호</mal:name>

      <mal:email>shcho@gnome.org</mal:email>

      <mal:years>2017</mal:years>

    </mal:credit>

  </info>

  <title>Button</title>

  <media type="image" mime="image/png" src="media/button.png"/>

  
눌렀을 때 레이블을 반전하는 콜백 함수에 연결한 단추 위젯입니다.

#include <gtk/gtk.h>

/*This is the callback function. It is a handler function which 

reacts to the signal. In this case, it will cause the button label's 

string to reverse.*/

static void

button_clicked (GtkButton *button,

                gpointer   user_data)

{

  const char *old_label;

  char *new_label;

  old_label = gtk_button_get_label (button);

  new_label = g_utf8_strreverse (old_label, -1);

  gtk_button_set_label (button, new_label);

  g_free (new_label);

}

static void

activate (GtkApplication *app,

          gpointer        user_data)

{

  GtkWidget *window;

  GtkWidget *button;

  /*Create a window with a title and a default size*/

  window = gtk_application_window_new (app);

  gtk_window_set_title (GTK_WINDOW (window), "GNOME Button");

  gtk_window_set_default_size (GTK_WINDOW (window), 250, 50);

  /*Create a button with a label, and add it to the window*/

  button = gtk_button_new_with_label ("Click Me");

  gtk_container_add (GTK_CONTAINER (window), button);

  /*Connecting the clicked signal to the callback function*/

  g_signal_connect (GTK_BUTTON (button),

                    "clicked", 

                    G_CALLBACK (button_clicked), 

                    G_OBJECT (window));

  gtk_widget_show_all (window);

}

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;

}

이 예제는 다음 참고자료가 필요합니다:

<list>

  <item>
<link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link>
</item>

  <item>
<link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link>
</item>

  <item>
<link href="http://developer.gnome.org/gtk3/stable/GtkButton.html">GtkButton</link>
</item>

  <item>
<link href="http://developer.gnome.org/glib/stable/glib-Unicode-Manipulation.html#g-utf8-strreverse">Unicode Manipulation</link>
</item>

</list>

</page>