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gtk2/gtk/gtkmain.c
Owen Taylor 3724a591d8 Fix some unused variables. 
Tue Oct 21 16:12:51 2003  Owen Taylor  <otaylor@redhat.com>

        * demos/gtk-demo/menus.c (do_menus): Fix some unused
        variables.

        * gtk/gtkmain.c (_gtk_get_lc_ctype): Fix an unused
        variable warning
2003-10-23 03:20:54 +00:00

2429 lines
60 KiB
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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "gdkconfig.h"
#include <locale.h>
#ifdef HAVE_BIND_TEXTDOMAIN_CODESET
#include <libintl.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gmodule.h>
#ifdef G_OS_UNIX
#include <unistd.h>
#include <sys/types.h> /* For uid_t, gid_t */
#endif
#ifdef G_OS_WIN32
#define STRICT
#include <windows.h>
#undef STRICT
#endif
#include <pango/pango-utils.h> /* For pango_split_file_list */
#include "config.h"
#include "gtkintl.h"
#include "gtkaccelmap.h"
#include "gtkbox.h"
#include "gtkdnd.h"
#include "gtkversion.h"
#include "gtkmain.h"
#include "gtkrc.h"
#include "gtkselection.h"
#include "gtksettings.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtkprivate.h"
#include "gtkdebug.h"
/* Private type definitions
*/
typedef struct _GtkInitFunction GtkInitFunction;
typedef struct _GtkQuitFunction GtkQuitFunction;
typedef struct _GtkClosure GtkClosure;
typedef struct _GtkKeySnooperData GtkKeySnooperData;
typedef struct _GtkModuleInfo GtkModuleInfo;
struct _GtkInitFunction
{
GtkFunction function;
gpointer data;
};
struct _GtkQuitFunction
{
guint id;
guint main_level;
GtkCallbackMarshal marshal;
GtkFunction function;
gpointer data;
GtkDestroyNotify destroy;
};
struct _GtkClosure
{
GtkCallbackMarshal marshal;
gpointer data;
GtkDestroyNotify destroy;
};
struct _GtkKeySnooperData
{
GtkKeySnoopFunc func;
gpointer func_data;
guint id;
};
struct _GtkModuleInfo
{
GtkModuleInitFunc init_func;
GtkModuleDisplayInitFunc display_init_func;
};
static gint gtk_quit_invoke_function (GtkQuitFunction *quitf);
static void gtk_quit_destroy (GtkQuitFunction *quitf);
static gint gtk_invoke_key_snoopers (GtkWidget *grab_widget,
GdkEvent *event);
static void gtk_destroy_closure (gpointer data);
static gboolean gtk_invoke_idle_timeout (gpointer data);
static void gtk_invoke_input (gpointer data,
gint source,
GdkInputCondition condition);
#if 0
static void gtk_error (gchar *str);
static void gtk_warning (gchar *str);
static void gtk_message (gchar *str);
static void gtk_print (gchar *str);
#endif
static GtkWindowGroup *gtk_main_get_window_group (GtkWidget *widget);
const guint gtk_major_version = GTK_MAJOR_VERSION;
const guint gtk_minor_version = GTK_MINOR_VERSION;
const guint gtk_micro_version = GTK_MICRO_VERSION;
const guint gtk_binary_age = GTK_BINARY_AGE;
const guint gtk_interface_age = GTK_INTERFACE_AGE;
static GSList *gtk_modules;
/* Saved argc,argv for delayed module initialization
*/
static gint gtk_argc = 0;
static gchar **gtk_argv = NULL;
static guint gtk_main_loop_level = 0;
static gint gtk_initialized = FALSE;
static GList *current_events = NULL;
static GSList *main_loops = NULL; /* stack of currently executing main loops */
static GList *init_functions = NULL; /* A list of init functions.
*/
static GList *quit_functions = NULL; /* A list of quit functions.
*/
static GMemChunk *quit_mem_chunk = NULL;
static GSList *key_snoopers = NULL;
guint gtk_debug_flags = 0; /* Global GTK debug flag */
#ifdef G_ENABLE_DEBUG
static const GDebugKey gtk_debug_keys[] = {
{"misc", GTK_DEBUG_MISC},
{"plugsocket", GTK_DEBUG_PLUGSOCKET},
{"text", GTK_DEBUG_TEXT},
{"tree", GTK_DEBUG_TREE},
{"updates", GTK_DEBUG_UPDATES},
{"keybindings", GTK_DEBUG_KEYBINDINGS},
{"multihead", GTK_DEBUG_MULTIHEAD}
};
static const guint gtk_ndebug_keys = sizeof (gtk_debug_keys) / sizeof (GDebugKey);
#endif /* G_ENABLE_DEBUG */
gchar*
gtk_check_version (guint required_major,
guint required_minor,
guint required_micro)
{
gint gtk_effective_micro = 100 * GTK_MINOR_VERSION + GTK_MICRO_VERSION;
gint required_effective_micro = 100 * required_minor + required_micro;
if (required_major > GTK_MAJOR_VERSION)
return "Gtk+ version too old (major mismatch)";
if (required_major < GTK_MAJOR_VERSION)
return "Gtk+ version too new (major mismatch)";
if (required_effective_micro < gtk_effective_micro - GTK_BINARY_AGE)
return "Gtk+ version too new (micro mismatch)";
if (required_effective_micro > gtk_effective_micro)
return "Gtk+ version too old (micro mismatch)";
return NULL;
}
/* This checks to see if the process is running suid or sgid
* at the current time. If so, we don't allow GTK+ to be initialized.
* This is meant to be a mild check - we only error out if we
* can prove the programmer is doing something wrong, not if
* they could be doing something wrong. For this reason, we
* don't use issetugid() on BSD or prctl (PR_GET_DUMPABLE).
*/
static gboolean
check_setugid (void)
{
/* this isn't at all relevant on MS Windows and doesn't compile ... --hb */
#ifndef G_OS_WIN32
uid_t ruid, euid, suid; /* Real, effective and saved user ID's */
gid_t rgid, egid, sgid; /* Real, effective and saved group ID's */
#ifdef HAVE_GETRESUID
/* These aren't in the header files, so we prototype them here.
*/
int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
if (getresuid (&ruid, &euid, &suid) != 0 ||
getresgid (&rgid, &egid, &sgid) != 0)
#endif /* HAVE_GETRESUID */
{
suid = ruid = getuid ();
sgid = rgid = getgid ();
euid = geteuid ();
egid = getegid ();
}
if (ruid != euid || ruid != suid ||
rgid != egid || rgid != sgid)
{
g_warning ("This process is currently running setuid or setgid.\n"
"This is not a supported use of GTK+. You must create a helper\n"
"program instead. For further details, see:\n\n"
" http://www.gtk.org/setuid.html\n\n"
"Refusing to initialize GTK+.");
exit (1);
}
#endif
return TRUE;
}
#ifdef G_OS_WIN32
G_WIN32_DLLMAIN_FOR_DLL_NAME(static, dll_name)
const gchar *
_gtk_get_libdir (void)
{
static char *gtk_libdir = NULL;
if (gtk_libdir == NULL)
gtk_libdir = g_win32_get_package_installation_subdirectory
(GETTEXT_PACKAGE, dll_name, "lib");
return gtk_libdir;
}
const gchar *
_gtk_get_localedir (void)
{
static char *gtk_localedir = NULL;
if (gtk_localedir == NULL)
gtk_localedir = g_win32_get_package_installation_subdirectory
(GETTEXT_PACKAGE, dll_name, "lib\\locale");
return gtk_localedir;
}
const gchar *
_gtk_get_sysconfdir (void)
{
static char *gtk_sysconfdir = NULL;
if (gtk_sysconfdir == NULL)
gtk_sysconfdir = g_win32_get_package_installation_subdirectory
(GETTEXT_PACKAGE, dll_name, "etc");
return gtk_sysconfdir;
}
const gchar *
_gtk_get_data_prefix (void)
{
static char *gtk_data_prefix = NULL;
if (gtk_data_prefix == NULL)
gtk_data_prefix = g_win32_get_package_installation_directory
(GETTEXT_PACKAGE, dll_name);
return gtk_data_prefix;
}
#endif /* G_OS_WIN32 */
static gchar **
get_module_path (void)
{
const gchar *module_path_env;
const gchar *exe_prefix;
const gchar *home_dir;
gchar *home_gtk_dir = NULL;
gchar *module_path;
gchar *default_dir;
static gchar **result = NULL;
if (result)
return result;
home_dir = g_get_home_dir();
if (home_dir)
home_gtk_dir = g_build_filename (home_dir, ".gtk-2.0", NULL);
module_path_env = g_getenv ("GTK_PATH");
exe_prefix = g_getenv ("GTK_EXE_PREFIX");
if (exe_prefix)
default_dir = g_build_filename (exe_prefix, "lib", "gtk-2.0", NULL);
else
default_dir = g_build_filename (GTK_LIBDIR, "gtk-2.0", NULL);
if (module_path_env && home_gtk_dir)
module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
module_path_env, home_gtk_dir, default_dir, NULL);
else if (module_path_env)
module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
module_path_env, default_dir, NULL);
else if (home_gtk_dir)
module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
home_gtk_dir, default_dir, NULL);
else
module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
default_dir, NULL);
g_free (home_gtk_dir);
g_free (default_dir);
result = pango_split_file_list (module_path);
g_free (module_path);
return result;
}
/**
* _gtk_get_module_path:
* @type: the type of the module, for instance 'modules', 'engines', immodules'
*
* Determines the search path for a particular type of module.
*
* Return value: the search path for the module type. Free with g_strfreev().
**/
gchar **
_gtk_get_module_path (const gchar *type)
{
gchar **paths = get_module_path();
gchar **path;
gchar **result;
gint count = 0;
for (path = paths; *path; path++)
count++;
result = g_new (gchar *, count * 4 + 1);
count = 0;
for (path = get_module_path (); *path; path++)
{
gint use_version, use_host;
for (use_version = TRUE; use_version >= FALSE; use_version--)
for (use_host = TRUE; use_host >= FALSE; use_host--)
{
gchar *tmp_dir;
if (use_version && use_host)
tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, GTK_HOST, type, NULL);
else if (use_version)
tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, type, NULL);
else if (use_host)
tmp_dir = g_build_filename (*path, GTK_HOST, type, NULL);
else
tmp_dir = g_build_filename (*path, type, NULL);
result[count++] = tmp_dir;
}
}
result[count++] = NULL;
return result;
}
/* Like g_module_path, but use .la as the suffix
*/
static gchar*
module_build_la_path (const gchar *directory,
const gchar *module_name)
{
gchar *filename;
gchar *result;
if (strncmp (module_name, "lib", 3) == 0)
filename = (gchar *)module_name;
else
filename = g_strconcat ("lib", module_name, ".la", NULL);
if (directory && *directory)
result = g_build_filename (directory, filename, NULL);
else
result = g_strdup (filename);
if (filename != module_name)
g_free (filename);
return result;
}
/**
* _gtk_find_module:
* @name: the name of the module
* @type: the type of the module, for instance 'modules', 'engines', immodules'
*
* Looks for a dynamically loadable module named @name of type @type in the
* standard GTK+ module search path.
*
* Return value: the pathname to the found module, or %NULL if it wasn't found.
* Free with g_free().
**/
gchar *
_gtk_find_module (const gchar *name,
const gchar *type)
{
gchar **paths;
gchar **path;
gchar *module_name = NULL;
if (g_path_is_absolute (name))
return g_strdup (name);
paths = _gtk_get_module_path (type);
for (path = paths; *path; path++)
{
gchar *tmp_name;
tmp_name = g_module_build_path (*path, name);
if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
{
module_name = tmp_name;
goto found;
}
g_free(tmp_name);
tmp_name = module_build_la_path (*path, name);
if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
{
module_name = tmp_name;
goto found;
}
g_free(tmp_name);
}
found:
g_strfreev (paths);
return module_name;
}
static GModule *
find_module (const gchar *name)
{
GModule *module;
gchar *module_name;
module_name = _gtk_find_module (name, "modules");
if (!module_name)
{
/* As last resort, try loading without an absolute path (using system
* library path)
*/
module_name = g_module_build_path (NULL, name);
}
module = g_module_open (module_name, G_MODULE_BIND_LAZY);
g_free(module_name);
return module;
}
static GSList *
load_module (GSList *module_list,
const gchar *name)
{
GtkModuleInitFunc modinit_func = NULL;
GtkModuleInfo *info;
GModule *module = NULL;
if (g_module_supported ())
{
module = find_module (name);
if (module &&
g_module_symbol (module, "gtk_module_init", (gpointer *) &modinit_func) &&
modinit_func)
{
if (!g_slist_find (module_list, (gconstpointer) modinit_func))
{
g_module_make_resident (module);
info = g_new (GtkModuleInfo, 1);
info->init_func = modinit_func;
g_module_symbol (module, "gtk_module_display_init",
(gpointer *) &info->display_init_func);
module_list = g_slist_prepend (module_list, info);
}
else
{
g_module_close (module);
module = NULL;
}
}
}
if (!modinit_func)
{
g_message ("Failed to load module \"%s\": %s",
module ? g_module_name (module) : name,
g_module_error ());
if (module)
g_module_close (module);
}
return module_list;
}
static GSList *
load_modules (const char *module_str)
{
gchar **module_names = pango_split_file_list (module_str);
GSList *module_list = NULL;
gint i;
for (i = 0; module_names[i]; i++)
module_list = load_module (module_list, module_names[i]);
module_list = g_slist_reverse (module_list);
g_strfreev (module_names);
return module_list;
}
static gboolean do_setlocale = TRUE;
/**
* gtk_disable_setlocale:
*
* Prevents gtk_init() and gtk_init_check() from automatically
* calling <literal>setlocale (LC_ALL, "")</literal>. You would
* want to use this function if you wanted to set the locale for
* your program to something other than the user's locale, or if
* you wanted to set different values for different locale categories.
*
* Most programs should not need to call this function.
**/
void
gtk_disable_setlocale (void)
{
if (gtk_initialized)
g_warning ("gtk_disable_setlocale() must be called before gtk_init()");
do_setlocale = FALSE;
}
#undef gtk_init_check
static void
default_display_notify_cb (GdkDisplayManager *display_manager)
{
GSList *slist;
/* Initialize non-multihead-aware modules when the
* default display is first set to a non-NULL value.
*/
static gboolean initialized = FALSE;
if (!gdk_display_get_default () || initialized)
return;
initialized = TRUE;
for (slist = gtk_modules; slist; slist = slist->next)
{
if (slist->data)
{
GtkModuleInfo *info = slist->data;
if (!info->display_init_func)
info->init_func (&gtk_argc, &gtk_argv);
}
}
}
static void
display_opened_cb (GdkDisplayManager *display_manager,
GdkDisplay *display)
{
GSList *slist;
for (slist = gtk_modules; slist; slist = slist->next)
{
if (slist->data)
{
GtkModuleInfo *info = slist->data;
if (info->display_init_func)
info->display_init_func (display);
}
}
}
/**
* gdk_parse_args:
* @argc: a pointer to the number of command line arguments.
* @argv: a pointer to the array of command line arguments.
*
* Parses command line arguments, and initializes global
* attributes of GTK+, but does not actually open a connection
* to a display. (See gdk_display_open(), gdk_get_display_arg_name())
*
* Any arguments used by GTK or GDK are removed from the array and
* @argc and @argv are updated accordingly.
*
* You shouldn't call this function explicitely if you are using
* gtk_init(), or gtk_init_check().
*
* Return value: %TRUE if initialization succeeded, otherwise %FALSE.
**/
gboolean
gtk_parse_args (int *argc,
char ***argv)
{
GString *gtk_modules_string = NULL;
GSList *slist;
GdkDisplayManager *display_manager;
const gchar *env_string;
if (gtk_initialized)
return TRUE;
if (!check_setugid ())
return FALSE;
#if 0
g_set_error_handler (gtk_error);
g_set_warning_handler (gtk_warning);
g_set_message_handler (gtk_message);
g_set_print_handler (gtk_print);
#endif
if (do_setlocale)
{
if (!setlocale (LC_ALL, ""))
g_warning ("Locale not supported by C library.\n\tUsing the fallback 'C' locale.");
}
gdk_parse_args (argc, argv);
gdk_event_handler_set ((GdkEventFunc)gtk_main_do_event, NULL, NULL);
#ifdef G_ENABLE_DEBUG
env_string = g_getenv ("GTK_DEBUG");
if (env_string != NULL)
{
gtk_debug_flags = g_parse_debug_string (env_string,
gtk_debug_keys,
gtk_ndebug_keys);
env_string = NULL;
}
#endif /* G_ENABLE_DEBUG */
env_string = g_getenv ("GTK_MODULES");
if (env_string)
gtk_modules_string = g_string_new (env_string);
if (argc && argv)
{
gint i, j, k;
for (i = 1; i < *argc;)
{
if (strcmp ("--gtk-module", (*argv)[i]) == 0 ||
strncmp ("--gtk-module=", (*argv)[i], 13) == 0)
{
gchar *module_name = (*argv)[i] + 12;
if (*module_name == '=')
module_name++;
else if (i + 1 < *argc)
{
(*argv)[i] = NULL;
i += 1;
module_name = (*argv)[i];
}
(*argv)[i] = NULL;
if (module_name && *module_name)
{
if (gtk_modules_string)
g_string_append_c (gtk_modules_string, G_SEARCHPATH_SEPARATOR);
else
gtk_modules_string = g_string_new (NULL);
g_string_append (gtk_modules_string, module_name);
}
}
else if (strcmp ("--g-fatal-warnings", (*argv)[i]) == 0)
{
GLogLevelFlags fatal_mask;
fatal_mask = g_log_set_always_fatal (G_LOG_FATAL_MASK);
fatal_mask |= G_LOG_LEVEL_WARNING | G_LOG_LEVEL_CRITICAL;
g_log_set_always_fatal (fatal_mask);
(*argv)[i] = NULL;
}
#ifdef G_ENABLE_DEBUG
else if ((strcmp ("--gtk-debug", (*argv)[i]) == 0) ||
(strncmp ("--gtk-debug=", (*argv)[i], 12) == 0))
{
gchar *equal_pos = strchr ((*argv)[i], '=');
if (equal_pos != NULL)
{
gtk_debug_flags |= g_parse_debug_string (equal_pos+1,
gtk_debug_keys,
gtk_ndebug_keys);
}
else if ((i + 1) < *argc && (*argv)[i + 1])
{
gtk_debug_flags |= g_parse_debug_string ((*argv)[i+1],
gtk_debug_keys,
gtk_ndebug_keys);
(*argv)[i] = NULL;
i += 1;
}
(*argv)[i] = NULL;
}
else if ((strcmp ("--gtk-no-debug", (*argv)[i]) == 0) ||
(strncmp ("--gtk-no-debug=", (*argv)[i], 15) == 0))
{
gchar *equal_pos = strchr ((*argv)[i], '=');
if (equal_pos != NULL)
{
gtk_debug_flags &= ~g_parse_debug_string (equal_pos+1,
gtk_debug_keys,
gtk_ndebug_keys);
}
else if ((i + 1) < *argc && (*argv)[i + 1])
{
gtk_debug_flags &= ~g_parse_debug_string ((*argv)[i+1],
gtk_debug_keys,
gtk_ndebug_keys);
(*argv)[i] = NULL;
i += 1;
}
(*argv)[i] = NULL;
}
#endif /* G_ENABLE_DEBUG */
i += 1;
}
for (i = 1; i < *argc; i++)
{
for (k = i; k < *argc; k++)
if ((*argv)[k] != NULL)
break;
if (k > i)
{
k -= i;
for (j = i + k; j < *argc; j++)
(*argv)[j-k] = (*argv)[j];
*argc -= k;
}
}
gtk_argv = g_malloc ((gtk_argc + 1) * sizeof (char*));
for (i = 0; i < gtk_argc; i++)
gtk_argv[i] = g_strdup ((*argv)[i]);
gtk_argv[gtk_argc] = NULL;
}
if (gtk_debug_flags & GTK_DEBUG_UPDATES)
gdk_window_set_debug_updates (TRUE);
/* load gtk modules */
if (gtk_modules_string)
{
gtk_modules = load_modules (gtk_modules_string->str);
g_string_free (gtk_modules_string, TRUE);
}
#ifdef ENABLE_NLS
bindtextdomain (GETTEXT_PACKAGE, GTK_LOCALEDIR);
# ifdef HAVE_BIND_TEXTDOMAIN_CODESET
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
# endif
#endif
{
/* Translate to default:RTL if you want your widgets
* to be RTL, otherwise translate to default:LTR.
* Do *not* translate it to "predefinito:LTR", if it
* it isn't default:LTR or default:RTL it will not work
*/
char *e = _("default:LTR");
if (strcmp (e, "default:RTL")==0) {
gtk_widget_set_default_direction (GTK_TEXT_DIR_RTL);
} else if (strcmp (e, "default:LTR")) {
g_warning ("Whoever translated default:LTR did so wrongly.\n");
}
}
gtk_type_init (0);
_gtk_accel_map_init ();
_gtk_rc_init ();
/* Set the 'initialized' flag.
*/
gtk_initialized = TRUE;
display_manager = gdk_display_manager_get ();
g_signal_connect (display_manager, "notify::default-display",
G_CALLBACK (default_display_notify_cb), NULL);
g_signal_connect (display_manager, "display-opened",
G_CALLBACK (display_opened_cb), NULL);
/* initialize multhead aware gtk modules; for other modules,
* we wait until we have a display open;
*/
for (slist = gtk_modules; slist; slist = slist->next)
{
if (slist->data)
{
GtkModuleInfo *info = slist->data;
if (info->display_init_func)
info->init_func (argc, argv);
}
}
return TRUE;
}
#undef gtk_init_check
/**
* gtk_init_check:
* @argc: Address of the <parameter>argc</parameter> parameter of your
* main() function. Changed if any arguments were handled.
* @argv: Address of the <parameter>argv</parameter> parameter of main().
* Any parameters understood by gtk_init() are stripped before return.
*
* This function does the same work as gtk_init() with only
* a single change: It does not terminate the program if the GUI can't be
* initialized. Instead it returns %FALSE on failure.
*
* This way the application can fall back to some other means of communication
* with the user - for example a curses or command line interface.
*
* Return value: %TRUE if the GUI has been successfully initialized,
* %FALSE otherwise.
**/
gboolean
gtk_init_check (int *argc,
char ***argv)
{
if (!gtk_parse_args (argc, argv))
return FALSE;
return gdk_display_open_default_libgtk_only () != NULL;
}
#undef gtk_init
/**
* gtk_init:
* @argc: Address of the <parameter>argc</parameter> parameter of your
* main() function. Changed if any arguments were handled.
* @argv: Address of the <parameter>argv</parameter> parameter of main().
* Any parameters understood by gtk_init() are stripped before return.
*
* Call this function before using any other GTK+ functions in your GUI
* applications. It will initialize everything needed to operate the
* toolkit and parses some standard command line options. @argc and
* @argv are adjusted accordingly so your own code will
* never see those standard arguments.
*
* <note><para>
* This function will terminate your program if it was unable to initialize
* the GUI for some reason. If you want your program to fall back to a
* textual interface you want to call gtk_init_check() instead.
* </para></note>
**/
void
gtk_init (int *argc, char ***argv)
{
if (!gtk_init_check (argc, argv))
{
const char *display_name_arg = gdk_get_display_arg_name ();
g_warning ("cannot open display: %s", display_name_arg ? display_name_arg : " ");
exit (1);
}
}
#ifdef G_PLATFORM_WIN32
static void
check_sizeof_GtkWindow (size_t sizeof_GtkWindow)
{
if (sizeof_GtkWindow != sizeof (GtkWindow))
g_error ("Incompatible build!\n"
"The code using GTK+ thinks GtkWindow is of different\n"
"size than it actually is in this build of GTK+.\n"
"On Windows, this probably means that you have compiled\n"
"your code with gcc without the -fnative-struct\n"
"(or -mms-bitfields) switch, or that you are using\n"
"an unsupported compiler.");
}
/* In GTK+ 2.0 the GtkWindow struct actually is the same size in
* gcc-compiled code on Win32 whether compiled with -fnative-struct or
* not. Unfortunately this wan't noticed until after GTK+ 2.0.1. So,
* from GTK+ 2.0.2 on, check some other struct, too, where the use of
* -fnative-struct still matters. GtkBox is one such.
*/
static void
check_sizeof_GtkBox (size_t sizeof_GtkBox)
{
if (sizeof_GtkBox != sizeof (GtkBox))
g_error ("Incompatible build!\n"
"The code using GTK+ thinks GtkBox is of different\n"
"size than it actually is in this build of GTK+.\n"
"On Windows, this probably means that you have compiled\n"
"your code with gcc without the -fnative-struct\n"
"(or -mms-bitfields) switch, or that you are using\n"
"an unsupported compiler.");
}
/* These two functions might get more checks added later, thus pass
* in the number of extra args.
*/
void
gtk_init_abi_check (int *argc, char ***argv, int num_checks, size_t sizeof_GtkWindow, size_t sizeof_GtkBox)
{
check_sizeof_GtkWindow (sizeof_GtkWindow);
if (num_checks >= 2)
check_sizeof_GtkBox (sizeof_GtkBox);
gtk_init (argc, argv);
}
gboolean
gtk_init_check_abi_check (int *argc, char ***argv, int num_checks, size_t sizeof_GtkWindow, size_t sizeof_GtkBox)
{
check_sizeof_GtkWindow (sizeof_GtkWindow);
if (num_checks >= 2)
check_sizeof_GtkBox (sizeof_GtkBox);
return gtk_init_check (argc, argv);
}
#endif
void
gtk_exit (gint errorcode)
{
exit (errorcode);
}
/**
* gtk_set_locale:
*
* Initializes internationalization support for GTK+. gtk_init()
* automatically does this, so there is typically no point
* in calling this function.
*
* If you are calling this function because you changed the locale
* after GTK+ is was initialized, then calling this function
* may help a bit. (Note, however, that changing the locale
* after GTK+ is initialized may produce inconsistent results and
* is not really supported.)
*
* In detail - sets the current locale according to the
* program environment. This is the same as calling the C library function
* <literal>setlocale (LC_ALL, "")</literal> but also takes care of the
* locale specific setup of the windowing system used by GDK.
*
* Returns: a string corresponding to the locale set, typically in the
* form lang_COUNTRY, where lang is an ISO-639 language code, and
* COUNTRY is an ISO-3166 country code. On Unix, this form matches the
* result of the setlocale(); it is also used on other machines, such as
* Windows, where the C library returns a different result. The string is
* owned by GTK+ and should not be modified or freed.
**/
gchar *
gtk_set_locale (void)
{
return gdk_set_locale ();
}
/**
* _gtk_get_lc_ctype:
*
* Return the Unix-style locale string for the language currently in
* effect. On Unix systems, this is the return value from
* <literal>setlocale(LC_CTYPE, NULL)</literal>, and the user can
* affect this through the environment variables LC_ALL, LC_CTYPE or
* LANG (checked in that order). The locale strings typically is in
* the form lang_COUNTRY, where lang is an ISO-639 language code, and
* COUNTRY is an ISO-3166 country code. For instance, sv_FI for
* Swedish as written in Finland or pt_BR for Portuguese as written in
* Brazil.
*
* On Windows, the C library doesn't use any such environment
* variables, and setting them won't affect the behaviour of functions
* like ctime(). The user sets the locale through the Regional Options
* in the Control Panel. The C library (in the setlocale() function)
* does not use country and language codes, but country and language
* names spelled out in English.
* However, this function does check the above environment
* variables, and does return a Unix-style locale string based on
* either said environment variables or the thread's current locale.
*
* Return value: a dynamically allocated string, free with g_free().
*/
gchar *
_gtk_get_lc_ctype (void)
{
#ifdef G_OS_WIN32
/* Somebody might try to set the locale for this process using the
* LANG or LC_ environment variables. The Microsoft C library
* doesn't know anything about them. You set the locale in the
* Control Panel. Setting these env vars won't have any affect on
* locale-dependent C library functions like ctime(). But just for
* kicks, do obey LC_ALL, LC_CTYPE and LANG in GTK. (This also makes
* it easier to test GTK and Pango in various default languages, you
* don't have to clickety-click in the Control Panel, you can simply
* start the program with LC_ALL=something on the command line.)
*/
gchar *p;
p = getenv ("LC_ALL");
if (p != NULL)
return g_strdup (p);
p = getenv ("LC_CTYPE");
if (p != NULL)
return g_strdup (p);
p = getenv ("LANG");
if (p != NULL)
return g_strdup (p);
return g_win32_getlocale ();
#else
return g_strdup (setlocale (LC_CTYPE, NULL));
#endif
}
/**
* gtk_get_default_language:
*
* Returns the #PangoLanguage for the default language currently in
* effect. (Note that this can change over the life of an
* application.) The default language is derived from the current
* locale. It determines, for example, whether GTK+ uses the
* right-to-left or left-to-right text direction. See
* _gtk_get_lc_ctype() for notes on behaviour on Windows.
*
* Return value: the default language as a #PangoLanguage, must not be
* freed
**/
PangoLanguage *
gtk_get_default_language (void)
{
gchar *lang;
PangoLanguage *result;
gchar *p;
lang = _gtk_get_lc_ctype ();
p = strchr (lang, '.');
if (p)
*p = '\0';
p = strchr (lang, '@');
if (p)
*p = '\0';
result = pango_language_from_string (lang);
g_free (lang);
return result;
}
void
gtk_main (void)
{
GList *tmp_list;
GList *functions;
GtkInitFunction *init;
GMainLoop *loop;
gtk_main_loop_level++;
loop = g_main_loop_new (NULL, TRUE);
main_loops = g_slist_prepend (main_loops, loop);
tmp_list = functions = init_functions;
init_functions = NULL;
while (tmp_list)
{
init = tmp_list->data;
tmp_list = tmp_list->next;
(* init->function) (init->data);
g_free (init);
}
g_list_free (functions);
if (g_main_loop_is_running (main_loops->data))
{
GDK_THREADS_LEAVE ();
g_main_loop_run (loop);
GDK_THREADS_ENTER ();
gdk_flush ();
}
if (quit_functions)
{
GList *reinvoke_list = NULL;
GtkQuitFunction *quitf;
while (quit_functions)
{
quitf = quit_functions->data;
tmp_list = quit_functions;
quit_functions = g_list_remove_link (quit_functions, quit_functions);
g_list_free_1 (tmp_list);
if ((quitf->main_level && quitf->main_level != gtk_main_loop_level) ||
gtk_quit_invoke_function (quitf))
{
reinvoke_list = g_list_prepend (reinvoke_list, quitf);
}
else
{
gtk_quit_destroy (quitf);
}
}
if (reinvoke_list)
{
GList *work;
work = g_list_last (reinvoke_list);
if (quit_functions)
quit_functions->prev = work;
work->next = quit_functions;
quit_functions = work;
}
gdk_flush ();
}
main_loops = g_slist_remove (main_loops, loop);
g_main_loop_unref (loop);
gtk_main_loop_level--;
}
guint
gtk_main_level (void)
{
return gtk_main_loop_level;
}
void
gtk_main_quit (void)
{
g_return_if_fail (main_loops != NULL);
g_main_loop_quit (main_loops->data);
}
gint
gtk_events_pending (void)
{
gboolean result;
GDK_THREADS_LEAVE ();
result = g_main_context_pending (NULL);
GDK_THREADS_ENTER ();
return result;
}
gboolean
gtk_main_iteration (void)
{
GDK_THREADS_LEAVE ();
g_main_context_iteration (NULL, TRUE);
GDK_THREADS_ENTER ();
if (main_loops)
return !g_main_loop_is_running (main_loops->data);
else
return TRUE;
}
gboolean
gtk_main_iteration_do (gboolean blocking)
{
GDK_THREADS_LEAVE ();
g_main_context_iteration (NULL, blocking);
GDK_THREADS_ENTER ();
if (main_loops)
return !g_main_loop_is_running (main_loops->data);
else
return TRUE;
}
/* private libgtk to libgdk interfaces
*/
gboolean gdk_pointer_grab_info_libgtk_only (GdkDisplay *display,
GdkWindow **grab_window,
gboolean *owner_events);
gboolean gdk_keyboard_grab_info_libgtk_only (GdkDisplay *display,
GdkWindow **grab_window,
gboolean *owner_events);
static void
rewrite_events_translate (GdkWindow *old_window,
GdkWindow *new_window,
gdouble *x,
gdouble *y)
{
gint old_origin_x, old_origin_y;
gint new_origin_x, new_origin_y;
gdk_window_get_origin (old_window, &old_origin_x, &old_origin_y);
gdk_window_get_origin (new_window, &new_origin_x, &new_origin_y);
*x += old_origin_x - new_origin_x;
*y += old_origin_y - new_origin_y;
}
static GdkEvent *
rewrite_event_for_window (GdkEvent *event,
GdkWindow *new_window)
{
event = gdk_event_copy (event);
switch (event->type)
{
case GDK_SCROLL:
rewrite_events_translate (event->any.window,
new_window,
&event->scroll.x, &event->scroll.y);
break;
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
rewrite_events_translate (event->any.window,
new_window,
&event->button.x, &event->button.y);
break;
case GDK_MOTION_NOTIFY:
rewrite_events_translate (event->any.window,
new_window,
&event->motion.x, &event->motion.y);
break;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
break;
default:
return event;
}
g_object_unref (event->any.window);
event->any.window = g_object_ref (new_window);
return event;
}
/* If there is a pointer or keyboard grab in effect with owner_events = TRUE,
* then what X11 does is deliver the event normally if it was going to this
* client, otherwise, delivers it in terms of the grab window. This function
* rewrites events to the effect that events going to the same window group
* are delivered normally, otherwise, the event is delivered in terms of the
* grab window.
*/
static GdkEvent *
rewrite_event_for_grabs (GdkEvent *event)
{
GdkWindow *grab_window;
GtkWidget *event_widget, *grab_widget;
gboolean owner_events;
GdkDisplay *display;
switch (event->type)
{
case GDK_SCROLL:
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
case GDK_MOTION_NOTIFY:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
display = gdk_drawable_get_display (event->proximity.window);
if (!gdk_pointer_grab_info_libgtk_only (display, &grab_window, &owner_events) ||
!owner_events)
return NULL;
break;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
display = gdk_drawable_get_display (event->key.window);
if (!gdk_keyboard_grab_info_libgtk_only (display, &grab_window, &owner_events) ||
!owner_events)
return NULL;
break;
default:
return NULL;
}
event_widget = gtk_get_event_widget (event);
gdk_window_get_user_data (grab_window, (void**) &grab_widget);
if (grab_widget &&
gtk_main_get_window_group (grab_widget) != gtk_main_get_window_group (event_widget))
return rewrite_event_for_window (event, grab_window);
else
return NULL;
}
void
gtk_main_do_event (GdkEvent *event)
{
GtkWidget *event_widget;
GtkWidget *grab_widget;
GtkWindowGroup *window_group;
GdkEvent *next_event;
GdkEvent *rewritten_event = NULL;
GList *tmp_list;
/* If there are any events pending then get the next one.
*/
next_event = gdk_event_peek ();
/* Try to compress enter/leave notify events. These event
* pairs occur when the mouse is dragged quickly across
* a window with many buttons (or through a menu). Instead
* of highlighting and de-highlighting each widget that
* is crossed it is better to simply de-highlight the widget
* which contained the mouse initially and highlight the
* widget which ends up containing the mouse.
*/
if (next_event)
if (((event->type == GDK_ENTER_NOTIFY) ||
(event->type == GDK_LEAVE_NOTIFY)) &&
((next_event->type == GDK_ENTER_NOTIFY) ||
(next_event->type == GDK_LEAVE_NOTIFY)) &&
(next_event->type != event->type) &&
(next_event->any.window == event->any.window))
{
/* Throw both the peeked copy and the queued copy away
*/
gdk_event_free (next_event);
next_event = gdk_event_get ();
gdk_event_free (next_event);
return;
}
if (next_event)
gdk_event_free (next_event);
if (event->type == GDK_SETTING)
{
_gtk_settings_handle_event (&event->setting);
return;
}
/* Find the widget which got the event. We store the widget
* in the user_data field of GdkWindow's.
* Ignore the event if we don't have a widget for it, except
* for GDK_PROPERTY_NOTIFY events which are handled specialy.
* Though this happens rarely, bogus events can occour
* for e.g. destroyed GdkWindows.
*/
event_widget = gtk_get_event_widget (event);
if (!event_widget)
{
/* To handle selection INCR transactions, we select
* PropertyNotify events on the requestor window and create
* a corresponding (fake) GdkWindow so that events get
* here. There won't be a widget though, so we have to handle
* them specially
*/
if (event->type == GDK_PROPERTY_NOTIFY)
_gtk_selection_incr_event (event->any.window,
&event->property);
return;
}
/* If pointer or keyboard grabs are in effect, munge the events
* so that each window group looks like a separate app.
*/
rewritten_event = rewrite_event_for_grabs (event);
if (rewritten_event)
{
event = rewritten_event;
event_widget = gtk_get_event_widget (event);
}
window_group = gtk_main_get_window_group (event_widget);
/* Push the event onto a stack of current events for
* gtk_current_event_get().
*/
current_events = g_list_prepend (current_events, event);
/* If there is a grab in effect...
*/
if (window_group->grabs)
{
grab_widget = window_group->grabs->data;
/* If the grab widget is an ancestor of the event widget
* then we send the event to the original event widget.
* This is the key to implementing modality.
*/
if (GTK_WIDGET_IS_SENSITIVE (event_widget) &&
gtk_widget_is_ancestor (event_widget, grab_widget))
grab_widget = event_widget;
}
else
{
grab_widget = event_widget;
}
/* Not all events get sent to the grabbing widget.
* The delete, destroy, expose, focus change and resize
* events still get sent to the event widget because
* 1) these events have no meaning for the grabbing widget
* and 2) redirecting these events to the grabbing widget
* could cause the display to be messed up.
*
* Drag events are also not redirected, since it isn't
* clear what the semantics of that would be.
*/
switch (event->type)
{
case GDK_NOTHING:
break;
case GDK_DELETE:
g_object_ref (event_widget);
if ((!window_group->grabs || gtk_widget_get_toplevel (window_group->grabs->data) == event_widget) &&
!gtk_widget_event (event_widget, event))
gtk_widget_destroy (event_widget);
g_object_unref (event_widget);
break;
case GDK_DESTROY:
/* Unexpected GDK_DESTROY from the outside, ignore for
* child windows, handle like a GDK_DELETE for toplevels
*/
if (!event_widget->parent)
{
g_object_ref (event_widget);
if (!gtk_widget_event (event_widget, event) &&
GTK_WIDGET_REALIZED (event_widget))
gtk_widget_destroy (event_widget);
g_object_unref (event_widget);
}
break;
case GDK_EXPOSE:
if (event->any.window && GTK_WIDGET_DOUBLE_BUFFERED (event_widget))
{
gdk_window_begin_paint_region (event->any.window, event->expose.region);
gtk_widget_send_expose (event_widget, event);
gdk_window_end_paint (event->any.window);
}
else
gtk_widget_send_expose (event_widget, event);
break;
case GDK_PROPERTY_NOTIFY:
case GDK_NO_EXPOSE:
case GDK_FOCUS_CHANGE:
case GDK_CONFIGURE:
case GDK_MAP:
case GDK_UNMAP:
case GDK_SELECTION_CLEAR:
case GDK_SELECTION_REQUEST:
case GDK_SELECTION_NOTIFY:
case GDK_CLIENT_EVENT:
case GDK_VISIBILITY_NOTIFY:
case GDK_WINDOW_STATE:
gtk_widget_event (event_widget, event);
break;
case GDK_SCROLL:
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
gtk_propagate_event (grab_widget, event);
break;
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
if (key_snoopers)
{
if (gtk_invoke_key_snoopers (grab_widget, event))
break;
}
/* else fall through */
case GDK_MOTION_NOTIFY:
case GDK_BUTTON_RELEASE:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
gtk_propagate_event (grab_widget, event);
break;
case GDK_ENTER_NOTIFY:
if (GTK_WIDGET_IS_SENSITIVE (grab_widget))
{
g_object_ref (event_widget);
gtk_widget_event (grab_widget, event);
if (event_widget == grab_widget)
GTK_PRIVATE_SET_FLAG (event_widget, GTK_LEAVE_PENDING);
g_object_unref (event_widget);
}
break;
case GDK_LEAVE_NOTIFY:
if (GTK_WIDGET_LEAVE_PENDING (event_widget))
{
GTK_PRIVATE_UNSET_FLAG (event_widget, GTK_LEAVE_PENDING);
gtk_widget_event (event_widget, event);
}
else if (GTK_WIDGET_IS_SENSITIVE (grab_widget))
gtk_widget_event (grab_widget, event);
break;
case GDK_DRAG_STATUS:
case GDK_DROP_FINISHED:
_gtk_drag_source_handle_event (event_widget, event);
break;
case GDK_DRAG_ENTER:
case GDK_DRAG_LEAVE:
case GDK_DRAG_MOTION:
case GDK_DROP_START:
_gtk_drag_dest_handle_event (event_widget, event);
break;
default:
g_assert_not_reached ();
break;
}
tmp_list = current_events;
current_events = g_list_remove_link (current_events, tmp_list);
g_list_free_1 (tmp_list);
if (rewritten_event)
gdk_event_free (rewritten_event);
}
gboolean
gtk_true (void)
{
return TRUE;
}
gboolean
gtk_false (void)
{
return FALSE;
}
static GtkWindowGroup *
gtk_main_get_window_group (GtkWidget *widget)
{
GtkWidget *toplevel = NULL;
if (widget)
toplevel = gtk_widget_get_toplevel (widget);
if (toplevel && GTK_IS_WINDOW (toplevel))
return _gtk_window_get_group (GTK_WINDOW (toplevel));
else
return _gtk_window_get_group (NULL);
}
typedef struct
{
GtkWidget *old_grab_widget;
GtkWidget *new_grab_widget;
} GrabNotifyInfo;
static gboolean
check_is_grabbed (GtkWidget *widget,
GtkWidget *grab_widget)
{
if (grab_widget)
return !(widget == grab_widget || gtk_widget_is_ancestor (widget, grab_widget));
else
return FALSE;
}
static void
gtk_grab_notify_foreach (GtkWidget *child,
gpointer data)
{
GrabNotifyInfo *info = data;
gboolean was_grabbed = check_is_grabbed (child, info->old_grab_widget);
gboolean is_grabbed = check_is_grabbed (child, info->new_grab_widget);
if (was_grabbed != is_grabbed)
{
g_object_ref (child);
g_signal_emit_by_name (child, "grab_notify", was_grabbed);
if (GTK_IS_CONTAINER (child))
gtk_container_foreach (GTK_CONTAINER (child), gtk_grab_notify_foreach, info);
g_object_unref (child);
}
}
static void
gtk_grab_notify (GtkWindowGroup *group,
GtkWidget *grab_widget,
gboolean was_grabbed)
{
GList *toplevels;
GrabNotifyInfo info;
if (was_grabbed)
{
info.old_grab_widget = grab_widget;
info.new_grab_widget = group->grabs ? group->grabs->data : NULL;
}
else
{
info.old_grab_widget = (group->grabs && group->grabs->next) ? group->grabs->next->data : NULL;
info.new_grab_widget = grab_widget;
}
g_object_ref (group);
g_object_ref (grab_widget);
toplevels = gtk_window_list_toplevels ();
g_list_foreach (toplevels, (GFunc)g_object_ref, NULL);
while (toplevels)
{
GtkWindow *toplevel = toplevels->data;
toplevels = g_list_delete_link (toplevels, toplevels);
if (group == _gtk_window_get_group (toplevel))
gtk_container_foreach (GTK_CONTAINER (toplevel), gtk_grab_notify_foreach, &info);
g_object_unref (toplevel);
}
g_object_unref (group);
g_object_unref (grab_widget);
}
void
gtk_grab_add (GtkWidget *widget)
{
GtkWindowGroup *group;
gboolean was_grabbed;
g_return_if_fail (widget != NULL);
if (!GTK_WIDGET_HAS_GRAB (widget) && GTK_WIDGET_IS_SENSITIVE (widget))
{
GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_GRAB);
group = gtk_main_get_window_group (widget);
was_grabbed = (group->grabs != NULL);
g_object_ref (widget);
group->grabs = g_slist_prepend (group->grabs, widget);
gtk_grab_notify (group, widget, FALSE);
}
}
GtkWidget*
gtk_grab_get_current (void)
{
GtkWindowGroup *group;
group = gtk_main_get_window_group (NULL);
if (group->grabs)
return GTK_WIDGET (group->grabs->data);
return NULL;
}
void
gtk_grab_remove (GtkWidget *widget)
{
GtkWindowGroup *group;
g_return_if_fail (widget != NULL);
if (GTK_WIDGET_HAS_GRAB (widget))
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_GRAB);
group = gtk_main_get_window_group (widget);
group->grabs = g_slist_remove (group->grabs, widget);
g_object_unref (widget);
gtk_grab_notify (group, widget, TRUE);
}
}
void
gtk_init_add (GtkFunction function,
gpointer data)
{
GtkInitFunction *init;
init = g_new (GtkInitFunction, 1);
init->function = function;
init->data = data;
init_functions = g_list_prepend (init_functions, init);
}
guint
gtk_key_snooper_install (GtkKeySnoopFunc snooper,
gpointer func_data)
{
GtkKeySnooperData *data;
static guint snooper_id = 1;
g_return_val_if_fail (snooper != NULL, 0);
data = g_new (GtkKeySnooperData, 1);
data->func = snooper;
data->func_data = func_data;
data->id = snooper_id++;
key_snoopers = g_slist_prepend (key_snoopers, data);
return data->id;
}
void
gtk_key_snooper_remove (guint snooper_id)
{
GtkKeySnooperData *data = NULL;
GSList *slist;
slist = key_snoopers;
while (slist)
{
data = slist->data;
if (data->id == snooper_id)
break;
slist = slist->next;
data = NULL;
}
if (data)
key_snoopers = g_slist_remove (key_snoopers, data);
}
static gint
gtk_invoke_key_snoopers (GtkWidget *grab_widget,
GdkEvent *event)
{
GSList *slist;
gint return_val = FALSE;
slist = key_snoopers;
while (slist && !return_val)
{
GtkKeySnooperData *data;
data = slist->data;
slist = slist->next;
return_val = (*data->func) (grab_widget, (GdkEventKey*) event, data->func_data);
}
return return_val;
}
guint
gtk_quit_add_full (guint main_level,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
static guint quit_id = 1;
GtkQuitFunction *quitf;
g_return_val_if_fail ((function != NULL) || (marshal != NULL), 0);
if (!quit_mem_chunk)
quit_mem_chunk = g_mem_chunk_new ("quit mem chunk", sizeof (GtkQuitFunction),
512, G_ALLOC_AND_FREE);
quitf = g_chunk_new (GtkQuitFunction, quit_mem_chunk);
quitf->id = quit_id++;
quitf->main_level = main_level;
quitf->function = function;
quitf->marshal = marshal;
quitf->data = data;
quitf->destroy = destroy;
quit_functions = g_list_prepend (quit_functions, quitf);
return quitf->id;
}
static void
gtk_quit_destroy (GtkQuitFunction *quitf)
{
if (quitf->destroy)
quitf->destroy (quitf->data);
g_mem_chunk_free (quit_mem_chunk, quitf);
}
static gint
gtk_quit_destructor (GtkObject **object_p)
{
if (*object_p)
gtk_object_destroy (*object_p);
g_free (object_p);
return FALSE;
}
void
gtk_quit_add_destroy (guint main_level,
GtkObject *object)
{
GtkObject **object_p;
g_return_if_fail (main_level > 0);
g_return_if_fail (GTK_IS_OBJECT (object));
object_p = g_new (GtkObject*, 1);
*object_p = object;
g_signal_connect (object,
"destroy",
G_CALLBACK (gtk_widget_destroyed),
object_p);
gtk_quit_add (main_level, (GtkFunction) gtk_quit_destructor, object_p);
}
guint
gtk_quit_add (guint main_level,
GtkFunction function,
gpointer data)
{
return gtk_quit_add_full (main_level, function, NULL, data, NULL);
}
void
gtk_quit_remove (guint id)
{
GtkQuitFunction *quitf;
GList *tmp_list;
tmp_list = quit_functions;
while (tmp_list)
{
quitf = tmp_list->data;
if (quitf->id == id)
{
quit_functions = g_list_remove_link (quit_functions, tmp_list);
g_list_free (tmp_list);
gtk_quit_destroy (quitf);
return;
}
tmp_list = tmp_list->next;
}
}
void
gtk_quit_remove_by_data (gpointer data)
{
GtkQuitFunction *quitf;
GList *tmp_list;
tmp_list = quit_functions;
while (tmp_list)
{
quitf = tmp_list->data;
if (quitf->data == data)
{
quit_functions = g_list_remove_link (quit_functions, tmp_list);
g_list_free (tmp_list);
gtk_quit_destroy (quitf);
return;
}
tmp_list = tmp_list->next;
}
}
guint
gtk_timeout_add_full (guint32 interval,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
if (marshal)
{
GtkClosure *closure;
closure = g_new (GtkClosure, 1);
closure->marshal = marshal;
closure->data = data;
closure->destroy = destroy;
return g_timeout_add_full (0, interval,
gtk_invoke_idle_timeout,
closure,
gtk_destroy_closure);
}
else
return g_timeout_add_full (0, interval, function, data, destroy);
}
guint
gtk_timeout_add (guint32 interval,
GtkFunction function,
gpointer data)
{
return g_timeout_add_full (0, interval, function, data, NULL);
}
void
gtk_timeout_remove (guint tag)
{
g_source_remove (tag);
}
guint
gtk_idle_add_full (gint priority,
GtkFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
if (marshal)
{
GtkClosure *closure;
closure = g_new (GtkClosure, 1);
closure->marshal = marshal;
closure->data = data;
closure->destroy = destroy;
return g_idle_add_full (priority,
gtk_invoke_idle_timeout,
closure,
gtk_destroy_closure);
}
else
return g_idle_add_full (priority, function, data, destroy);
}
guint
gtk_idle_add (GtkFunction function,
gpointer data)
{
return g_idle_add_full (G_PRIORITY_DEFAULT_IDLE, function, data, NULL);
}
guint
gtk_idle_add_priority (gint priority,
GtkFunction function,
gpointer data)
{
return g_idle_add_full (priority, function, data, NULL);
}
void
gtk_idle_remove (guint tag)
{
g_source_remove (tag);
}
void
gtk_idle_remove_by_data (gpointer data)
{
if (!g_idle_remove_by_data (data))
g_warning ("gtk_idle_remove_by_data(%p): no such idle", data);
}
guint
gtk_input_add_full (gint source,
GdkInputCondition condition,
GdkInputFunction function,
GtkCallbackMarshal marshal,
gpointer data,
GtkDestroyNotify destroy)
{
if (marshal)
{
GtkClosure *closure;
closure = g_new (GtkClosure, 1);
closure->marshal = marshal;
closure->data = data;
closure->destroy = destroy;
return gdk_input_add_full (source,
condition,
(GdkInputFunction) gtk_invoke_input,
closure,
(GdkDestroyNotify) gtk_destroy_closure);
}
else
return gdk_input_add_full (source, condition, function, data, destroy);
}
void
gtk_input_remove (guint tag)
{
g_source_remove (tag);
}
static void
gtk_destroy_closure (gpointer data)
{
GtkClosure *closure = data;
if (closure->destroy)
(closure->destroy) (closure->data);
g_free (closure);
}
static gboolean
gtk_invoke_idle_timeout (gpointer data)
{
GtkClosure *closure = data;
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = G_TYPE_BOOLEAN;
args[0].d.pointer_data = &ret_val;
closure->marshal (NULL, closure->data, 0, args);
return ret_val;
}
static void
gtk_invoke_input (gpointer data,
gint source,
GdkInputCondition condition)
{
GtkClosure *closure = data;
GtkArg args[3];
args[0].type = G_TYPE_INT;
args[0].name = NULL;
GTK_VALUE_INT (args[0]) = source;
args[1].type = GDK_TYPE_INPUT_CONDITION;
args[1].name = NULL;
GTK_VALUE_FLAGS (args[1]) = condition;
args[2].type = G_TYPE_NONE;
args[2].name = NULL;
closure->marshal (NULL, closure->data, 2, args);
}
/**
* gtk_get_current_event:
*
* Obtains a copy of the event currently being processed by GTK+. For
* example, if you get a "clicked" signal from #GtkButton, the current
* event will be the #GdkEventButton that triggered the "clicked"
* signal. The returned event must be freed with gdk_event_free().
* If there is no current event, the function returns %NULL.
*
* Return value: a copy of the current event, or %NULL if no current event.
**/
GdkEvent*
gtk_get_current_event (void)
{
if (current_events)
return gdk_event_copy (current_events->data);
else
return NULL;
}
/**
* gtk_get_current_event_time:
*
* If there is a current event and it has a timestamp, return that
* timestamp, otherwise return %GDK_CURRENT_TIME.
*
* Return value: the timestamp from the current event, or %GDK_CURRENT_TIME.
**/
guint32
gtk_get_current_event_time (void)
{
if (current_events)
return gdk_event_get_time (current_events->data);
else
return GDK_CURRENT_TIME;
}
/**
* gtk_get_current_event_state:
* @state: a location to store the state of the current event
*
* If there is a current event and it has a state field, place
* that state field in @state and return %TRUE, otherwise return
* %FALSE.
*
* Return value: %TRUE if there was a current event and it had a state field
**/
gboolean
gtk_get_current_event_state (GdkModifierType *state)
{
g_return_val_if_fail (state != NULL, FALSE);
if (current_events)
return gdk_event_get_state (current_events->data, state);
else
{
*state = 0;
return FALSE;
}
}
/**
* gtk_get_event_widget:
* @event: a #GdkEvent
*
* If @event is %NULL or the event was not associated with any widget,
* returns %NULL, otherwise returns the widget that received the event
* originally.
*
* Return value: the widget that originally received @event, or %NULL
**/
GtkWidget*
gtk_get_event_widget (GdkEvent *event)
{
GtkWidget *widget;
widget = NULL;
if (event && event->any.window)
gdk_window_get_user_data (event->any.window, (void**) &widget);
return widget;
}
static gint
gtk_quit_invoke_function (GtkQuitFunction *quitf)
{
if (!quitf->marshal)
return quitf->function (quitf->data);
else
{
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = G_TYPE_BOOLEAN;
args[0].d.pointer_data = &ret_val;
((GtkCallbackMarshal) quitf->marshal) (NULL,
quitf->data,
0, args);
return ret_val;
}
}
/**
* gtk_propagate_event:
* @widget: a #GtkWidget
* @event: an event
*
* Sends an event to a widget, propagating the event to parent widgets
* if the event remains unhandled. Events received by GTK+ from GDK
* normally begin in gtk_main_do_event(). Depending on the type of
* event, existence of modal dialogs, grabs, etc., the event may be
* propagated; if so, this function is used. gtk_propagate_event()
* calls gtk_widget_event() on each widget it decides to send the
* event to. So gtk_widget_event() is the lowest-level function; it
* simply emits the "event" and possibly an event-specific signal on a
* widget. gtk_propagate_event() is a bit higher-level, and
* gtk_main_do_event() is the highest level.
*
* All that said, you most likely don't want to use any of these
* functions; synthesizing events is rarely needed. Consider asking on
* the mailing list for better ways to achieve your goals. For
* example, use gdk_window_invalidate_rect() or
* gtk_widget_queue_draw() instead of making up expose events.
*
**/
void
gtk_propagate_event (GtkWidget *widget,
GdkEvent *event)
{
gint handled_event;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (event != NULL);
handled_event = FALSE;
g_object_ref (widget);
if ((event->type == GDK_KEY_PRESS) ||
(event->type == GDK_KEY_RELEASE))
{
/* Only send key events within Window widgets to the Window
* The Window widget will in turn pass the
* key event on to the currently focused widget
* for that window.
*/
GtkWidget *window;
window = gtk_widget_get_toplevel (widget);
if (window && GTK_IS_WINDOW (window))
{
/* If there is a grab within the window, give the grab widget
* a first crack at the key event
*/
if (widget != window && GTK_WIDGET_HAS_GRAB (widget))
handled_event = gtk_widget_event (widget, event);
if (!handled_event)
{
window = gtk_widget_get_toplevel (widget);
if (window && GTK_IS_WINDOW (window))
{
if (GTK_WIDGET_IS_SENSITIVE (window))
gtk_widget_event (window, event);
}
}
handled_event = TRUE; /* don't send to widget */
}
}
/* Other events get propagated up the widget tree
* so that parents can see the button and motion
* events of the children.
*/
if (!handled_event)
{
while (TRUE)
{
GtkWidget *tmp;
handled_event = !GTK_WIDGET_IS_SENSITIVE (widget) || gtk_widget_event (widget, event);
tmp = widget->parent;
g_object_unref (widget);
widget = tmp;
if (!handled_event && widget)
g_object_ref (widget);
else
break;
}
}
else
g_object_unref (widget);
}
#if 0
static void
gtk_error (gchar *str)
{
gtk_print (str);
}
static void
gtk_warning (gchar *str)
{
gtk_print (str);
}
static void
gtk_message (gchar *str)
{
gtk_print (str);
}
static void
gtk_print (gchar *str)
{
static GtkWidget *window = NULL;
static GtkWidget *text;
static int level = 0;
GtkWidget *box1;
GtkWidget *box2;
GtkWidget *table;
GtkWidget *hscrollbar;
GtkWidget *vscrollbar;
GtkWidget *separator;
GtkWidget *button;
if (level > 0)
{
fputs (str, stdout);
fflush (stdout);
return;
}
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_signal_connect (GTK_OBJECT (window), "destroy",
(GtkSignalFunc) gtk_widget_destroyed,
&window);
gtk_window_set_title (GTK_WINDOW (window), "Messages");
box1 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), box1);
gtk_widget_show (box1);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
gtk_widget_show (box2);
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
gtk_widget_show (table);
text = gtk_text_new (NULL, NULL);
gtk_text_set_editable (GTK_TEXT (text), FALSE);
gtk_table_attach_defaults (GTK_TABLE (table), text, 0, 1, 0, 1);
gtk_widget_show (text);
gtk_widget_realize (text);
hscrollbar = gtk_hscrollbar_new (GTK_TEXT (text)->hadj);
gtk_table_attach (GTK_TABLE (table), hscrollbar, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (hscrollbar);
vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (vscrollbar);
separator = gtk_hseparator_new ();
gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
gtk_widget_show (separator);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
gtk_widget_show (box2);
button = gtk_button_new_with_label ("close");
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_hide,
GTK_OBJECT (window));
gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_widget_grab_default (button);
gtk_widget_show (button);
}
level += 1;
gtk_text_insert (GTK_TEXT (text), NULL, NULL, NULL, str, -1);
level -= 1;
if (!GTK_WIDGET_VISIBLE (window))
gtk_widget_show (window);
}
#endif
gboolean
_gtk_boolean_handled_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gboolean continue_emission;
gboolean signal_handled;
signal_handled = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, signal_handled);
continue_emission = !signal_handled;
return continue_emission;
}
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