Μια γραμμή εργαλείων δημιουργήθηκε χρησιμοποιώντας XML και GtkBuilder.
Για μια πιο βαθιά ματιά σε αυτό το δείγμα, παρακαλώ μην διστάσετε να κοιτάξετε το γραμμή μενού Vala και/ή τα μαθήματα γραμμή μενού Python.
#include <gtk/gtk.h>
/* Callback function for the "copy" action */
static void
copy_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
g_print ("\"Copy\" activated\n");
}
/* Callback function for the "paste" action */
static void
paste_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
g_print ("\"Paste\" activated\n");
}
/* Callback function for the "shape" action */
static void
shape_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
/* We first gather the value of the GVariant instance with a string type.
* The overall goal here is to see if shape is set to line, triangle, etc,
* and put that value within the variable "answer".
*/
const gchar *answer = g_variant_get_string (parameter, NULL);
g_printf ("Shape is set to %s.\n", answer);
/* Note that we set the state of the action */
g_simple_action_set_state (simple, parameter);
}
/* Callback function in which closes the about_dialog created below */
static void
on_close (GtkDialog *dialog,
gint response_id,
gpointer user_data)
{
gtk_widget_destroy (GTK_WIDGET (dialog));
}
/* Callback function for the about action (see aboutdialog.c example) */
static void
about_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
GtkWidget *about_dialog;
about_dialog = gtk_about_dialog_new ();
const gchar *authors[] = {"GNOME Documentation Team", NULL};
const gchar *documenters[] = {"GNOME Documentation Team", NULL};
/* Fill in the about_dialog with the desired information */
gtk_about_dialog_set_program_name (GTK_ABOUT_DIALOG (about_dialog), "AboutDialog Example");
gtk_about_dialog_set_copyright (GTK_ABOUT_DIALOG (about_dialog), "Copyright \xc2\xa9 2012 GNOME Documentation Team");
gtk_about_dialog_set_authors (GTK_ABOUT_DIALOG (about_dialog), authors);
gtk_about_dialog_set_documenters (GTK_ABOUT_DIALOG (about_dialog), documenters);
gtk_about_dialog_set_website_label (GTK_ABOUT_DIALOG (about_dialog), "GNOME Developer Website");
gtk_about_dialog_set_website (GTK_ABOUT_DIALOG (about_dialog), "http://developer.gnome.org");
/* The "response" signal is emitted when the dialog receives a delete event,
* therefore we connect that signal to the on_close callback function
* created above.
*/
g_signal_connect (GTK_DIALOG (about_dialog), "response",
G_CALLBACK (on_close), NULL);
/* Show the about dialog */
gtk_widget_show (about_dialog);
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *window;
GSimpleAction *copy_action;
GSimpleAction *paste_action;
GSimpleAction *shape_action;
GSimpleAction *about_action;
/* Create a window with a title and a default size */
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "MenuBar Example");
gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);
/* Begin creating the "copy" action.
* Note that it is an action without a state.
*/
copy_action = g_simple_action_new ("copy", NULL);
/* Connected to a callback function */
g_signal_connect (copy_action, "activate", G_CALLBACK (copy_callback),
GTK_WINDOW (window));
/* Added to the window */
g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (copy_action));
/* Begin creating the "paste" action.
* Note that it is an action without a state.
*/
paste_action = g_simple_action_new ("paste", NULL);
/* Connect the action to a callback function */
g_signal_connect (paste_action, "activate", G_CALLBACK (paste_callback),
GTK_WINDOW (window));
/* Add it to the window */
g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (paste_action));
/* Begin creating the "shape" action.
* Note that it is an action with a state.
* First we state that the parameter type of the simple action is a string.
* When using g_variant_type_new, it is appropriate to free the return value
* once you're done with it.
*/
GVariantType *type_string = g_variant_type_new ("s");
/* parameters for the g_simple_action_new_stateful are: (name, parameter type,
* initial state).
*/
shape_action = g_simple_action_new_stateful ("shape", type_string,
g_variant_new_string ("line"));
/* Connect the action to a callback function */
g_signal_connect (shape_action, "activate", G_CALLBACK (shape_callback),
GTK_WINDOW (window));
/* Add it to the window */
g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (shape_action));
g_variant_type_free (type_string);
/* Begin creating the "about" action.
* Note that it is an action without a state.
*/
about_action = g_simple_action_new ("about", NULL);
/* Connect the action to a callback function */
g_signal_connect (about_action, "activate", G_CALLBACK (about_callback),
GTK_WINDOW (window));
/* Add it to the window */
g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (about_action));
gtk_widget_show_all (window);
}
/* Callback function for the "new" action */
static void
new_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
g_print ("You clicked \"New\"\n");
}
/* Callback function for the "quit" action */
static void
quit_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
GApplication *application = user_data;
g_print ("You clicked \"Quit\"\n");
g_application_quit (application);
}
/* Callback function for the "state" action */
static void
state_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
/* The two possibilities in this case for the "answer" variable are either
* "on" or "off".
*/
const gchar *answer = g_variant_get_string (parameter, NULL);
/* We print the information to the user */
g_printf ("State is set to %s.\n", answer);
/* Note that we set the state of the action */
g_simple_action_set_state (simple, parameter);
}
/* Callback function for the "awesome" action */
static void
awesome_callback (GSimpleAction *simple,
GVariant *parameter,
gpointer user_data)
{
GVariant *action_state = g_action_get_state (G_ACTION (simple));
gboolean active = g_variant_get_boolean (action_state);
GVariant *new_state = g_variant_new_boolean (!active);
/* Set the new state for the action.
* (Keeps track of whether it was last checked or unchecked).
*/
g_simple_action_set_state (simple, new_state);
if (active)
g_print ("You unchecked \"Awesome\"\n");
else
g_print ("You checked \"Awesome\"\n");
}
/* Startup function for the menu we are creating in this sample */
static void
startup (GApplication *app,
gpointer user_data)
{
/* Initialize variables */
GSimpleAction *new_action;
GSimpleAction *quit_action;
GSimpleAction *state_action;
GSimpleAction *awesome_action;
GtkBuilder *builder;
GError *error = NULL;
/* Begin creating the "new" action.
* Note that it is an action without a state.
*/
new_action = g_simple_action_new ("new", NULL);
g_signal_connect (new_action, "activate", G_CALLBACK (new_callback), app);
/* It is added to the overall application */
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (new_action));
/* Begin creating the "quit" action.
* Note that it is an action without a state.
*/
quit_action = g_simple_action_new ("quit", NULL);
g_signal_connect (quit_action, "activate", G_CALLBACK (quit_callback), app);
/* It is added to the overall application */
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (quit_action));
/* Begin creating the "state" action.
* Note that it is an action with a state.
*/
GVariantType *type_string2 = g_variant_type_new ("s");
state_action = g_simple_action_new_stateful ("state", type_string2,
g_variant_new_string ("off"));
g_signal_connect (state_action, "activate", G_CALLBACK (state_callback), app);
/* It is added to the overall application */
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (state_action));
g_variant_type_free (type_string2);
/* Begin creating the "awesome" action.
* Note that it is an action with a state.
*/
awesome_action = g_simple_action_new_stateful ("awesome", NULL, g_variant_new_boolean (FALSE));
g_signal_connect (awesome_action, "activate", G_CALLBACK (awesome_callback), app);
/* It is added to the overall application */
g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (awesome_action));
/* A builder to add the User Interface designed with GLADE to the grid: */
builder = gtk_builder_new ();
/* Get the file (if it is there):
* Note: you must make sure that the file is in the current directory for
* this to work. The function used here returns a non-null value within
* our variable "error" if an error is indeed found.
*/
gtk_builder_add_from_file (builder, "menubar.ui", &error);
if (error != NULL) {
g_print ("%s\n", error->message);
g_error_free (error);
}
/* Extract the menubar */
GObject *menubar = gtk_builder_get_object (builder, "menubar");
gtk_application_set_menubar (GTK_APPLICATION (app), G_MENU_MODEL (menubar));
/* Extract the appmenu */
GObject *appmenu = gtk_builder_get_object (builder, "appmenu");
gtk_application_set_app_menu (GTK_APPLICATION (app), G_MENU_MODEL (appmenu));
}
/* Startup function for the application */
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
Σε αυτό το παράδειγμα χρησιμοποιήσαμε τα παρακάτω:
GtkApplication
GtkWindow
GSimpleAction
GtkAboutDialog
GVariantType