Clear GtkEntry Sample

sample.c

/* 
 * Build:
 * gcc $(pkg-config --cflags gtk+-3.0) sample.c -o sample $(pkg-config --libs gtk+-3.0)
 */

#include <gtk/gtk.h>

void clear_text (GtkButton *button, gpointer data)
{
  gtk_entry_set_text (GTK_ENTRY (data), "");
}

int main (int argc, char *argv[])
{
  GtkWidget *window, *entry, *vbox, *button;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
  gtk_container_set_border_width (GTK_CONTAINER (window), 5);
  gtk_window_set_default_size (GTK_WINDOW (window), 200, 80);

  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 16);
  gtk_container_add (GTK_CONTAINER (window), vbox);

  entry = gtk_entry_new ();
  gtk_container_add (GTK_CONTAINER (vbox), entry);

  button = gtk_button_new_with_label ("Clear");
  gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
  gtk_widget_set_halign (button, GTK_ALIGN_CENTER);
  gtk_container_add (GTK_CONTAINER (vbox), button);
  g_signal_connect (G_OBJECT (button), "clicked", G_CALLBACK (clear_text), entry);

  g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);

  gtk_widget_show_all (window);

  gtk_main ();

  return 0;
}