/* * * 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>#include <stdlib.h>static GdkPixmap *pmap;static GdkGC *gc;GtkObject *adj1, *adj2;voidSetAdjustments( GtkObject *adj1, GtkObject *adj2, int width, int height ){  GTK_ADJUSTMENT( adj1 )->lower = 0.0;  GTK_ADJUSTMENT( adj1 )->upper = (float) height - 1.0;  GTK_ADJUSTMENT( adj1 )->step_increment = 1.0;  GTK_ADJUSTMENT( adj1 )->page_increment = 25.0;  GTK_ADJUSTMENT( adj1 )->page_size = 1.0;  GTK_ADJUSTMENT( adj1 )->value = 0.0;  GTK_ADJUSTMENT( adj2 )->lower = 0.0;  GTK_ADJUSTMENT( adj2 )->upper = (float) width - 1.0;  GTK_ADJUSTMENT( adj2 )->step_increment = 1.0;  GTK_ADJUSTMENT( adj2 )->page_increment = 25.0;  GTK_ADJUSTMENT( adj2 )->page_size = 1.0;  GTK_ADJUSTMENT( adj2 )->value = 0.0;}static voidAdjustmentChanged(GtkAdjustment *w, gpointer data){  GtkWidget *drawing = (GtkWidget *) data;  int x = GTK_ADJUSTMENT(adj2)->value;  int y = GTK_ADJUSTMENT(adj1)->value;  gdk_draw_pixmap(drawing->window, gc, pmap, x, y, 0, 0, 100, 75);}main( argc, argv )int argc;char *argv[];{  GtkWidget *window, *hsb, *vsb, *vbox, *hbox, *drawing;  int width, height, x, y, depth;  int hsbwidth, hsbheight, vsbwidth, vsbheight;  GdkBitmap *mask;  gtk_init( &argc, &argv );  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);  gtk_window_position(GTK_WINDOW(window), GTK_WIN_POS_MOUSE);  gtk_widget_set_usize(window, 100, 75);  gtk_window_set_policy(GTK_WINDOW( window ), FALSE, FALSE, TRUE);   gtk_widget_show( window );  gtk_signal_connect(GTK_OBJECT(window), "destroy",    GTK_SIGNAL_FUNC(gtk_widget_destroyed), &window);  gtk_window_set_title(GTK_WINDOW (window), "GtkAdjustment Demo");  vbox = gtk_vbox_new( FALSE, 0 );  gtk_container_add( GTK_CONTAINER( window ), vbox );  hbox = gtk_hbox_new( FALSE, 0 );  gtk_box_pack_start( GTK_BOX( vbox ), hbox, TRUE, TRUE, 0 );  drawing = gtk_drawing_area_new();  adj1 = gtk_adjustment_new(0.0, 0.0, 0.0, 1.0, 5.0, 0.0);  gtk_signal_connect(GTK_OBJECT(adj1), "value_changed",    GTK_SIGNAL_FUNC(AdjustmentChanged), drawing);  vsb = gtk_vscrollbar_new( GTK_ADJUSTMENT(adj1) );  gtk_box_pack_end( GTK_BOX( hbox ), vsb, FALSE, TRUE, 0 );  adj2 = gtk_adjustment_new(0.0, 0.0, 0.0, 1.0, 5.0, 0.0);  gtk_signal_connect(GTK_OBJECT(adj2), "value_changed",    GTK_SIGNAL_FUNC(AdjustmentChanged), drawing);  hsb = gtk_hscrollbar_new( GTK_ADJUSTMENT(adj2) );  gtk_box_pack_end( GTK_BOX( vbox ), hsb, FALSE, TRUE, 0 );  gtk_box_pack_start( GTK_BOX( hbox ), drawing, TRUE, TRUE, 0 );  gtk_widget_show_all( GTK_WIDGET( window ) );  pmap = gdk_pixmap_create_from_xpm(drawing->window, &mask,    (GdkColor *) NULL, "stang.xpm");          gc = gdk_gc_new( drawing->window );  gdk_window_get_geometry((GdkWindow *) hsb->window, &x, &y, &hsbwidth,     &hsbheight, &depth);  gdk_window_get_geometry((GdkWindow *) vsb->window, &x, &y, &vsbwidth,     &vsbheight, &depth);  gdk_window_get_geometry((GdkWindow *) pmap, &x, &y, &width, &height,    &depth);  SetAdjustments( adj1, adj2, (width - 100) + vsbwidth,     (height - 75) + hsbheight );	  gtk_main();}