/* * * Sample Code for Gtk+ Programming in C, 1st Edition, Prentice Hall * * Copyright 2000 - 2002 Syd Logan, All Rights Reserved * * This code is distributed without warranty. You are free to use this * code for any purpose, however, if this code is republished or * redistributed in its original form, as hardcopy or electronically, * then you must include this copyright notice along with the code. * * Questions or comments regarding this code or any bugs it contains can * be directed to the author via e-mail at slogan@cts.com **/#include <gtk/gtk.h>static GtkWidget *vruler, *hruler;static voidToggleCallback(GtkWidget *widget, gpointer dummy){  static int foo = 1;printf( "foo %d\n", foo );  gtk_ruler_set_range (GTK_RULER (hruler), 0, 300, 0, foo );  gtk_ruler_set_range (GTK_RULER (vruler), 0, 300, 0, foo );  foo = foo * 2;  if ( foo > 800 )    foo = 1;#if 0  static GtkMetricType metric = GTK_PIXELS;  if ( metric == GTK_PIXELS )    metric = GTK_INCHES;  else if ( metric == GTK_INCHES )    metric = GTK_CENTIMETERS;  else    metric = GTK_PIXELS;  gtk_ruler_set_metric (GTK_RULER (hruler), metric);  gtk_ruler_set_metric (GTK_RULER (vruler), metric);#endif}main( int argc, char *argv[] ){  GtkWidget *dialog_window, *table;  GtkWidget *button;  gtk_init( &argc, &argv );  dialog_window = gtk_dialog_new();  gtk_window_position (GTK_WINDOW (dialog_window), GTK_WIN_POS_MOUSE);  gtk_widget_set_usize (dialog_window, 300, 300);  gtk_widget_show( dialog_window );  table = gtk_table_new (2, 2, FALSE);  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     table, TRUE, TRUE, 0);  hruler = gtk_hruler_new();	  gtk_ruler_set_range (GTK_RULER (hruler), 0, 300, 0, 1);  gtk_table_attach (GTK_TABLE (table), hruler, 1, 2, 0, 1,    GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);  vruler = gtk_vruler_new();	  gtk_ruler_set_range (GTK_RULER (vruler), 0, 300, 0, 1);  gtk_table_attach (GTK_TABLE (table), vruler, 0, 1, 1, 2,    GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);  button = gtk_button_new_with_label("Toggle");  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog_window)->action_area),     button, TRUE, TRUE, 0);  gtk_signal_connect (GTK_OBJECT (button), "clicked",     GTK_SIGNAL_FUNC(ToggleCallback), dialog_window);  gtk_widget_show_all (dialog_window);  gtk_main();}