GTK入门导读(Menu物件) - Linux

/File/New\", \"N\", NULL, NULL},
{\"

/File/Open\", \"O\", NULL, NULL},
{\"

/File/Save\", \"S\", NULL, NULL},
{\"

/File/Save as\", NULL, NULL, NULL},
{\"

/File/\", NULL, NULL, NULL},
{\"

/File/Quit\", \"Q\", file_quit_cmd_callback, \"OK, I\"ll quit\"},
{\"

/Options/Test\", NULL, NULL, NULL}
};

/* calculate the number of menu_item\"s */
static int nmenu_items = sizeof(menu_items) / sizeof(menu_items[0]);

static int initialize = TRUE;
static GtkMenuFactory *factory = NULL;
static GtkMenuFactory *subfactory[1];
static GHashTable *entry_ht = NULL;

void get_main_menu(GtkWidget ** menubar, GtkAcceleratorTable ** table)
{
if (initialize)
menus_init();

if (menubar)
*menubar = subfactory[0]->widget;
if (table)
*table = subfactory[0]->table;
}

void menus_init(void)
{
if (initialize) {
initialize = FALSE;

factory = gtk_menu_factory_new(GTK_MENU_FACTORY_MENU_BAR);
subfactory[0] = gtk_menu_factory_new(GTK_MENU_FACTORY_MENU_BAR);

gtk_menu_factory_add_subfactory(factory, subfactory[0], \"

\");
menus_create(menu_items, nmenu_items);
}
}

void menus_create(GtkMenuEntry * entries, int nmenu_entries)
{
char *accelerator;
int i;

if (initialize)
menus_init();

if (entry_ht)
for (i = 0; i < nmenu_entries; i++) {
accelerator = g_hash_table_lookup(entry_ht, entries[i].path);
if (accelerator) {
if (accelerator[0] == \"\\0\")
entries[i].accelerator = NULL;
else
entries[i].accelerator = accelerator;
}
}
gtk_menu_factory_add_entries(factory, entries, nmenu_entries);

for (i = 0; i < nmenu_entries; i++)
if (entries[i].widget) {
gtk_signal_connect(GTK_OBJECT(entries[i].widget), \"install_accelerator\",
(GtkSignalFunc) menus_install_accel,
entries[i].path);
gtk_signal_connect(GTK_OBJECT(entries[i].widget), \"remove_accelerator\",
(GtkSignalFunc) menus_remove_accel,
entries[i].path);
}
}

static gint menus_install_accel(GtkWidget * widget, gchar * signal_name, gchar key, gchar modifiers, gchar * path)
{
char accel[64];
char *t1, t2[2];

accel[0] = \"\\0\";
if (modifiers & GDK_CONTROL_MASK)
strcat(accel, \"\");
if (modifiers & GDK_SHIFT_MASK)
strcat(accel, \"\");
if (modifiers & GDK_MOD1_MASK)
strcat(accel, \"\");

t2[0] = key;
t2[1] = \"\\0\";
strcat(accel, t2);

if (entry_ht) {
t1 = g_hash_table_lookup(entry_ht, path);
g_free(t1);
} else
entry_ht = g_hash_table_new(g_string_hash, g_string_equal);

g_hash_table_insert(entry_ht, path, g_strdup(accel));

return TRUE;
}

static void menus_remove_accel(GtkWidget * widget, gchar * signal_name, gchar * path)
{
char *t;

if (entry_ht) {
t = g_hash_table_lookup(entry_ht, path);
g_free(t);

g_hash_table_insert(entry_ht, path, g_strdup(\"\"));
}
}

void menus_set_sensitive(char *path, int sensitive)
{
GtkMenuPath *menu_path;

if (initialize)
menus_init();

menu_path = gtk_menu_factory_find(factory, path);
if (menu_path)
gtk_widget_set_sensitive(menu_path->widget, sensitive);
else
g_warning(\"Unable to set sensitivity for menu which doesn\"t exist: %s\", path);
}

And here\"s the main.h

#ifndef __MAIN_H__
#define __MAIN_H__

#ifdef __cplusplus
extern \"C\" {
#endif /* __cplusplus */

void file_quit_cmd_callback(GtkWidget *widget, gpointer data);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __MAIN_H__ */

And main.c

#include

#include \"main.h\"
#include \"menus.h\"

int main(int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *main_vbox;
GtkWidget *menubar;

GtkAcceleratorTable *accel;

gtk_init(&argc, &argv);

window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_signal_connect(GTK_OBJECT(window), \"destroy\",
GTK_SIGNAL_FUNC(file_quit_cmd_callback),
\"WM destroy\");
gtk_window_set_title(GTK_WINDOW(window), \"Menu Factory\");
gtk_widget_set_usize(GTK_WIDGET(window), 300, 200);

main_vbox = gtk_vbox_new(FALSE, 1);
gtk_container_border_width(GTK_CONTAINER(main_vbox), 1);
gtk_container_add(GTK_CONTAINER(window), main_vbox);
gtk_widget_show(main_vbox);

get_main_menu(&menubar, &accel);
gtk_window_add_accelerator_table(GTK_WINDOW(window), accel);
gtk_box_pack_start(GTK_BOX(main_vbox), menubar, FALSE, TRUE, 0);
gtk_widget_show(menubar);

gtk_widget_show(window);
gtk_main();

return(0);
}

/* This is just to demonstrate how callbacks work when using the
* menufactory. Often, people put all the callbacks from the menus
* in a separate file, and then have them call the appropriate functions
* from there. Keeps it more organized. */
void file_quit_cmd_callback (GtkWidget *widget, gpointer data)
{
g_print (\"%s\\n\", (char *) data);
gtk_exit(0);
}

这里是makefile.

CC = gcc
PROF = -g
C_FLAGS = -Wall $(PROF) -L/usr/local/include -DDEBUG
L_FLAGS = $(PROF) -L/usr/X11R6/lib -L/usr/local/lib
L_POSTFLAGS = -lgtk -lgdk -lglib -lXext -lX11 -lm
PROGNAME = at

O_FILES = menus.o main.o

$(PROGNAME): $(O_FILES)
rm -f $(PROGNAME)
$(CC) $(L_FLAGS) -o $(PROGNAME) $(O_FILES) $(L_POSTFLAGS)

.c.o:
$(CC) -c $(C_FLAGS) $<

clean:
rm -f core *.o $(PROGNAME) nohup.out
distclean: clean
rm -f *~

发布人:netbull 来自:Linux开发指南