1. Development of The Menu System
KwangWoo Choi
Department of Physics
Kangwon National University
Steps for the menu system
1. Show a window
2. Start the menu widget
3. Enter the menu entry
4. Set the action to the menu item
5. Make menu bar and show it
6. Reshow a whole window

2. Show A Window Start The Menu Widget
Make a 640x480 window with its title of “Bifurcation Plotter.”
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_set_usize( GTK_WIDGET (window), 640, 480);
gtk_window_set_title(GTK_WINDOW (window), "Bifurcation Plotter");
Start The Menu Widget
menu = gtk_menu_new();

3. Set Root and Child Menu Items
Set the root menu and show it.
/* Set the menu item */
plot_menu = gtk_menu_item_new_with_label("Plot");
root_menu = gtk_menu_item_new_with_label("Setting");
/* Show the menu item */
gtk_widget_show(plot_menu);
gtk_widget_show(root_menu);
Set the child menu and set the action to the menu item.
/* Set the child menu */
menu_items = gtk_menu_item_new_with_label("Set Parameters");
gtk_menu_append(GTK_MENU (menu), menu_items);
/* Set the action to the menu item (e.g. menuitem_response)*/
gtk_signal_connect (GTK_OBJECT(menu_items), "activate", GTK_SIGNAL_FUNC(menuitem_response), (gpointer) g_strdup(buf));

4. Set Root and Child Menu Items
Define the action.
static void menuitem_response (GtkWidget *widget, gchar *string) {
printf("%s\n", string); }
Running screen of
“Bifurcation Plotter”