test_for_ip_valid.c~

LINUX 2.4下面使用GTK书写的一个系统控制面板

#include <ctype.h>
#include <gtk/gtk.h>
int count_for_doc;
void insert_text_handler (GtkEntry    *entry,
                          const gchar *text,
                          gint         length,
                          gint        *position,
                          gpointer     data)
{
  GtkEditable *editable = GTK_EDITABLE(entry);
  int i, count=0;
  gchar *result = g_new (gchar, length);

  for (i=0; i < length; i++) {
    if ((text[i] != '1') & (text[i] != '2') & (text[i] != '3') & (text[i] != '4') & (text[i] != '5') & (text[i] != '6')  & (text[i] != '7') & (text[i] != '8') & (text[i] != '9') & (text[i] != '0') & (text[i] != '.'))
	continue;
     //if ([0] == '.') continue;
     //if ((i > 1) & (text[i] == '.') & (text[i-1] == '.')) continue;
     //if (text[i] == '.') 
      //{
	//	count_for_doc++;
	//	if (count_for_doc = 4) continue; 
      //}
    //result[count++] = islower(text[i]) ? toupper(text[i]) : text[i];
    result[count++] = text[i];
  }
  
  if (count > 0) {
    g_signal_handlers_block_by_func (G_OBJECT (editable),
                                     G_CALLBACK (insert_text_handler),
                                     data);
    gtk_editable_insert_text (editable, result, count, position);
    g_signal_handlers_unblock_by_func (G_OBJECT (editable),
                                       G_CALLBACK (insert_text_handler),
                                       data);
  }
  g_signal_stop_emission_by_name (G_OBJECT (editable), "insert_text");

  g_free (result);
}

int main (int   argc,
          char *argv[])
{
  GtkWidget *window;
  GtkWidget *entry;
  count_for_doc=0;
  gtk_init (&argc, &argv);
  
  /* create a new window */
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW (window), "GTK Entry");
  g_signal_connect (G_OBJECT (window), "destroy",
                    G_CALLBACK (gtk_main_quit),
                    NULL);

  entry = gtk_entry_new();
  g_signal_connect(G_OBJECT(entry), "insert_text",
		     G_CALLBACK(insert_text_handler),
		     NULL);
  gtk_container_add(GTK_CONTAINER (window), entry);
  gtk_widget_show(entry);
  
  gtk_widget_show(window);
  
  gtk_main();
  return(0);
}