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#include <stdio.h>
#include <gtk/gtk.h>

#define APP_TITLE "Browser Installer"
#define APP_LOGO "/usr/local/lib/X11/pixmaps/www48.png"
#define APP_ICON "/usr/local/lib/X11/mini-icons/pet16.xpm"
#define INFO_LABEL_TEXT "In order to browse the web, you'll have to install a web browser. Just pick a browser and click its logo; the installation is fully automated."
#define WELCOME_LABEL_TEXT "<b>Welcome to the browser installer!</b>"

#define ICON_DIR "/usr/share/pixmaps"
#define ICON_EXT "png"
#define FALLBACK_ICON "/usr/local/apps/ROX-Filer/ROX/MIME/application-pet.png"

#define SPACING 15

GdkPixbuf *load_icon(gchar *icon_path)
{
	GdkPixbuf *icon = gdk_pixbuf_new_from_file(icon_path, NULL);
	if (icon == NULL) {
		icon = gdk_pixbuf_new_from_file(FALLBACK_ICON, NULL);
		if (icon == NULL) {
			return NULL;
		}	
	}
	return icon;
}

GtkWidget *create_package_button(gchar *package_name, gchar *package_description) {
	GtkWidget *button;
	gchar *package_icon_path = g_strconcat(ICON_DIR, "/", package_name, ".", ICON_EXT, NULL);
	button = gtk_button_new_with_label(package_description);
	gtk_button_set_image(GTK_BUTTON(button), gtk_image_new_from_pixbuf(load_icon(package_icon_path)));

	g_free(package_icon_path);
	return button;
}
	
int main( int argc, char *argv[])
{
	GtkWidget *window;
	GtkWidget *vbox;
	
	GtkWidget *hbox;
	GtkWidget *app_logo;
		
	GtkWidget *labels_vbox;
	GtkWidget *welcome_label;
	GtkWidget *info_label;

	GtkWidget *buttons_vbox;
	GtkWidget *button;
	
	GtkWidget *close_button;
	
	gtk_init(&argc, &argv);

	/* the window */
	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_title(GTK_WINDOW(window), APP_TITLE);
	gtk_window_set_icon(GTK_WINDOW(window), load_icon(APP_ICON));
	gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window), 250, 180);
	
	g_signal_connect(window, "destroy", 
						G_CALLBACK (gtk_main_quit), NULL);
   
	/* the header */
	hbox = gtk_hbox_new(FALSE, SPACING);
	app_logo = gtk_image_new_from_pixbuf(load_icon(APP_LOGO));
    gtk_box_pack_start(GTK_BOX(hbox), app_logo, TRUE, TRUE, 0);
    
    /* the labels vbox */
    labels_vbox = gtk_vbox_new(FALSE, 0);
	gtk_container_add(GTK_CONTAINER(hbox), labels_vbox);
        
    /* welcome label */
    welcome_label = gtk_label_new(NULL);
    gtk_label_set_markup(GTK_LABEL(welcome_label), WELCOME_LABEL_TEXT);
    gtk_box_pack_start(GTK_BOX(labels_vbox), welcome_label, TRUE, TRUE, 0);

	/* info label */
    info_label = gtk_label_new(INFO_LABEL_TEXT);
    gtk_label_set_line_wrap(GTK_LABEL(info_label), TRUE);
  	gtk_box_pack_start(GTK_BOX(labels_vbox), info_label, TRUE, TRUE, 0);

	/* package buttons */
	buttons_vbox = gtk_vbox_new(TRUE, 0);
	button = create_package_button("firefox", "Firefox web browser");
	gtk_box_pack_start(GTK_BOX(buttons_vbox), button, TRUE, TRUE, 0);
	button = create_package_button("seamonkey", "Seamonkey internet suite");
	gtk_box_pack_start(GTK_BOX(buttons_vbox), button, TRUE, TRUE, 0);
	button = create_package_button("opera", "Opera web browser");
	gtk_box_pack_start(GTK_BOX(buttons_vbox), button, TRUE, TRUE, 0);

	/* the close button */
	close_button = gtk_button_new_from_stock(GTK_STOCK_CLOSE);
	g_signal_connect(close_button, "clicked", 
						G_CALLBACK (gtk_main_quit), NULL);
   
	/* put the header, the package buttons and the close button inside a big vbox */
	vbox = gtk_vbox_new(FALSE, SPACING);
	gtk_container_add(GTK_CONTAINER(vbox), hbox);
	gtk_container_add(GTK_CONTAINER(vbox), buttons_vbox);
	gtk_container_add(GTK_CONTAINER(window), vbox);
	gtk_container_add(GTK_CONTAINER(vbox), close_button);
	gtk_widget_show_all(window);
	
	gtk_main();

	return 0;
}