Menu doesn't display while creating it in GTK+ 3 C - c

Question

Screenshot of the output
i am new with gtk+. while learning to create menus in gtk+ i simply copy paste the following code and when i run it....i don't know what is the problem but only it shows window. it does not show any menus or menu bar... help me if anyone has been through this problem...
#include <gtk/gtk.h>
GdkPixbuf *create_pixbuf(const gchar * filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_file(filename, &error);
if (!pixbuf) {
fprintf(stderr, "%s\n", error->message);
g_error_free(error);
}
return pixbuf;
}
int main(int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *icon;
GtkWidget *vbox;
GtkWidget *menubar;
GtkWidget *fileMenu;
GtkWidget *fileMi;
GtkWidget *quitMi;
GtkWidget *text_view;
GtkWidget *buffer;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "Write Pad");
gtk_window_set_default_size(GTK_WINDOW(window), 500, 400);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
icon = create_pixbuf("Web.png");
gtk_window_set_icon(GTK_WINDOW(window), icon);
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_add(GTK_CONTAINER(window), vbox);
text_view = gtk_text_view_new ();
gtk_box_pack_start (GTK_BOX (vbox), text_view, 1, 1, 0);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
menubar = gtk_menu_bar_new();
fileMenu = gtk_menu_new();
fileMi = gtk_menu_item_new_with_label("File");
quitMi = gtk_menu_item_new_with_label("Quit");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(fileMi), fileMenu);
gtk_menu_shell_append(GTK_MENU_SHELL(fileMenu), quitMi);
gtk_menu_shell_append(GTK_MENU_SHELL(menubar), fileMi);
gtk_box_pack_start(GTK_BOX(vbox), menubar, FALSE, FALSE, 0);
g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(G_OBJECT(quitMi), "activate", G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_show_all(window);
gtk_main();
return 0;
}

Answer 1

There are a few problems with the code. All of the variables you declare use the GtkWidget * type, while the functions create_pixbuf and gtk_text_view_get_buffer return data of the GdkPixbuf * and GtkTextBuffer * types. You also use a deprecated function.
Moreover, you call the menu related functions after the GtkTextView related functions, thereby placing the menu at the bottom of the window.
Here is the working code:
#include <gtk/gtk.h>
GdkPixbuf *
create_pixbuf (const gchar *filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_file (filename, &error);
if (!pixbuf) {
fprintf (stderr, "%s\n", error->message);
g_error_free (error);
}
return pixbuf;
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GdkPixbuf *icon;
GtkWidget *vbox;
GtkWidget *menubar;
GtkWidget *fileMenu;
GtkWidget *fileMi;
GtkWidget *quitMi;
GtkWidget *text_view;
GtkTextBuffer *buffer;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
icon = create_pixbuf ("Web.png");
gtk_window_set_title (GTK_WINDOW (window), "Write Pad");
gtk_window_set_default_size (GTK_WINDOW (window), 500, 400);
gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
gtk_window_set_icon (GTK_WINDOW (window), icon);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
menubar = gtk_menu_bar_new ();
fileMenu = gtk_menu_new ();
fileMi = gtk_menu_item_new_with_label ("File");
quitMi = gtk_menu_item_new_with_label ("Quit");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (fileMi), fileMenu);
gtk_menu_shell_append (GTK_MENU_SHELL (fileMenu), quitMi);
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), fileMi);
gtk_box_pack_start (GTK_BOX (vbox), menubar, FALSE, FALSE, 0);
text_view = gtk_text_view_new ();
gtk_box_pack_start (GTK_BOX (vbox), text_view, TRUE, TRUE, 0);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);
g_signal_connect (G_OBJECT (quitMi), "activate", G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}