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gtk2/gtk/gtkmain.c

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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 "config.h"
#include <glib.h>
#include "gdkconfig.h"
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h> /* For uid_t, gid_t */
#ifdef G_OS_WIN32
#define STRICT
#include <windows.h>
#undef STRICT
#endif
#include "gtkintl.h"
#include "gtkaccelmap.h"
#include "gtkbox.h"
#include "gtkclipboard.h"
#include "gtkdnd.h"
#include "gtkversion.h"
#include "gtkmain.h"
#include "gtkmodules.h"
#include "gtkrc.h"
#include "gtkrecentmanager.h"
#include "gtkselection.h"
#include "gtksettings.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtktooltip.h"
#include "gtkdebug.h"
#include "gtkmenu.h"
#include "gdk/gdkkeysyms.h"
#include "gdk/gdkprivate.h" /* for GDK_WINDOW_DESTROYED */
#ifdef G_OS_WIN32
static HMODULE gtk_dll;
BOOL WINAPI
DllMain (HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
gtk_dll = (HMODULE) hinstDLL;
break;
}
return TRUE;
}
/* These here before inclusion of gtkprivate.h so that the original
* GTK_LIBDIR and GTK_LOCALEDIR definitions are seen. Yeah, this is a
* bit sucky.
*/
const gchar *
_gtk_get_libdir (void)
{
static char *gtk_libdir = NULL;
if (gtk_libdir == NULL)
{
gchar *root = g_win32_get_package_installation_directory_of_module (gtk_dll);
gchar *slash = strrchr (root, '\\');
if (g_ascii_strcasecmp (slash + 1, ".libs") == 0)
gtk_libdir = GTK_LIBDIR;
else
gtk_libdir = g_build_filename (root, "lib", NULL);
g_free (root);
}
return gtk_libdir;
}
const gchar *
_gtk_get_localedir (void)
{
static char *gtk_localedir = NULL;
if (gtk_localedir == NULL)
{
const gchar *p;
gchar *root, *temp;
/* GTK_LOCALEDIR ends in either /lib/locale or
* /share/locale. Scan for that slash.
*/
p = GTK_LOCALEDIR + strlen (GTK_LOCALEDIR);
while (*--p != '/')
;
while (*--p != '/')
;
root = g_win32_get_package_installation_directory_of_module (gtk_dll);
temp = g_build_filename (root, p, NULL);
g_free (root);
/* gtk_localedir is passed to bindtextdomain() which isn't
* UTF-8-aware.
*/
gtk_localedir = g_win32_locale_filename_from_utf8 (temp);
g_free (temp);
}
return gtk_localedir;
}
#endif
#include "gtkprivate.h"
/* Private type definitions
*/
typedef struct _GtkInitFunction GtkInitFunction;
typedef struct _GtkQuitFunction GtkQuitFunction;
typedef struct _GtkKeySnooperData GtkKeySnooperData;
struct _GtkInitFunction
{
GtkFunction function;
gpointer data;
};
struct _GtkQuitFunction
{
guint id;
guint main_level;
GtkCallbackMarshal marshal;
GtkFunction function;
gpointer data;
GDestroyNotify destroy;
};
struct _GtkKeySnooperData
{
GtkKeySnoopFunc func;
gpointer func_data;
guint id;
};
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 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 guint gtk_main_loop_level = 0;
static gint pre_initialized = FALSE;
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 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},
{"modules", GTK_DEBUG_MODULES},
{"geometry", GTK_DEBUG_GEOMETRY},
{"icontheme", GTK_DEBUG_ICONTHEME},
{"printing", GTK_DEBUG_PRINTING},
{"builder", GTK_DEBUG_BUILDER},
{"size-request", GTK_DEBUG_SIZE_REQUEST},
};
#endif /* G_ENABLE_DEBUG */
/**
* gtk_check_version:
* @required_major: the required major version.
* @required_minor: the required minor version.
* @required_micro: the required micro version.
*
* Checks that the GTK+ library in use is compatible with the
* given version. Generally you would pass in the constants
* #GTK_MAJOR_VERSION, #GTK_MINOR_VERSION, #GTK_MICRO_VERSION
* as the three arguments to this function; that produces
* a check that the library in use is compatible with
* the version of GTK+ the application or module was compiled
* against.
*
* Compatibility is defined by two things: first the version
* of the running library is newer than the version
* @required_major.required_minor.@required_micro. Second
* the running library must be binary compatible with the
* version @required_major.required_minor.@required_micro
* (same major version.)
*
* This function is primarily for GTK+ modules; the module
* can call this function to check that it wasn't loaded
* into an incompatible version of GTK+. However, such a
* a check isn't completely reliable, since the module may be
* linked against an old version of GTK+ and calling the
* old version of gtk_check_version(), but still get loaded
* into an application using a newer version of GTK+.
*
* Return value: %NULL if the GTK+ library is compatible with the
* given version, or a string describing the version mismatch.
* The returned string is owned by GTK+ and should not be modified
* or freed.
**/
const 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
const gchar *
_gtk_get_datadir (void)
{
static char *gtk_datadir = NULL;
if (gtk_datadir == NULL)
{
gchar *root = g_win32_get_package_installation_directory_of_module (gtk_dll);
gtk_datadir = g_build_filename (root, "share", NULL);
g_free (root);
}
return gtk_datadir;
}
const gchar *
_gtk_get_sysconfdir (void)
{
static char *gtk_sysconfdir = NULL;
if (gtk_sysconfdir == NULL)
{
gchar *root = g_win32_get_package_installation_directory_of_module (gtk_dll);
gtk_sysconfdir = g_build_filename (root, "etc", NULL);
g_free (root);
}
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_of_module (gtk_dll);
return gtk_data_prefix;
}
#endif /* G_OS_WIN32 */
static gboolean do_setlocale = TRUE;
/**
* gtk_disable_setlocale:
*
* Prevents gtk_init(), gtk_init_check(), gtk_init_with_args() and
* gtk_parse_args() 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 (pre_initialized)
g_warning ("gtk_disable_setlocale() must be called before gtk_init()");
do_setlocale = FALSE;
}
#ifdef G_PLATFORM_WIN32
#undef gtk_init_check
#endif
static GString *gtk_modules_string = NULL;
static gboolean g_fatal_warnings = FALSE;
#ifdef G_ENABLE_DEBUG
static gboolean
gtk_arg_debug_cb (const char *key, const char *value, gpointer user_data)
{
gtk_debug_flags |= g_parse_debug_string (value,
gtk_debug_keys,
G_N_ELEMENTS (gtk_debug_keys));
return TRUE;
}
static gboolean
gtk_arg_no_debug_cb (const char *key, const char *value, gpointer user_data)
{
gtk_debug_flags &= ~g_parse_debug_string (value,
gtk_debug_keys,
G_N_ELEMENTS (gtk_debug_keys));
return TRUE;
}
#endif /* G_ENABLE_DEBUG */
static gboolean
gtk_arg_module_cb (const char *key, const char *value, gpointer user_data)
{
if (value && *value)
{
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, value);
}
return TRUE;
}
static const GOptionEntry gtk_args[] = {
{ "gtk-module", 0, 0, G_OPTION_ARG_CALLBACK, gtk_arg_module_cb,
/* Description of --gtk-module=MODULES in --help output */ N_("Load additional GTK+ modules"),
/* Placeholder in --gtk-module=MODULES in --help output */ N_("MODULES") },
{ "g-fatal-warnings", 0, 0, G_OPTION_ARG_NONE, &g_fatal_warnings,
/* Description of --g-fatal-warnings in --help output */ N_("Make all warnings fatal"), NULL },
#ifdef G_ENABLE_DEBUG
{ "gtk-debug", 0, 0, G_OPTION_ARG_CALLBACK, gtk_arg_debug_cb,
/* Description of --gtk-debug=FLAGS in --help output */ N_("GTK+ debugging flags to set"),
/* Placeholder in --gtk-debug=FLAGS in --help output */ N_("FLAGS") },
{ "gtk-no-debug", 0, 0, G_OPTION_ARG_CALLBACK, gtk_arg_no_debug_cb,
/* Description of --gtk-no-debug=FLAGS in --help output */ N_("GTK+ debugging flags to unset"),
/* Placeholder in --gtk-no-debug=FLAGS in --help output */ N_("FLAGS") },
#endif
{ NULL }
};
#ifdef G_OS_WIN32
static char *iso639_to_check = NULL;
static char *iso3166_to_check = NULL;
static char *script_to_check = NULL;
static gboolean setlocale_called = FALSE;
static BOOL CALLBACK
enum_locale_proc (LPTSTR locale)
{
LCID lcid;
char iso639[10];
char iso3166[10];
char *endptr;
lcid = strtoul (locale, &endptr, 16);
if (*endptr == '\0' &&
GetLocaleInfo (lcid, LOCALE_SISO639LANGNAME, iso639, sizeof (iso639)) &&
GetLocaleInfo (lcid, LOCALE_SISO3166CTRYNAME, iso3166, sizeof (iso3166)))
{
if (strcmp (iso639, iso639_to_check) == 0 &&
((iso3166_to_check != NULL &&
strcmp (iso3166, iso3166_to_check) == 0) ||
(iso3166_to_check == NULL &&
SUBLANGID (LANGIDFROMLCID (lcid)) == SUBLANG_DEFAULT)))
{
char language[100], country[100];
char locale[300];
if (script_to_check != NULL)
{
/* If lcid is the "other" script for this language,
* return TRUE, i.e. continue looking.
*/
if (strcmp (script_to_check, "Latn") == 0)
{
switch (LANGIDFROMLCID (lcid))
{
case MAKELANGID (LANG_AZERI, SUBLANG_AZERI_CYRILLIC):
return TRUE;
case MAKELANGID (LANG_UZBEK, SUBLANG_UZBEK_CYRILLIC):
return TRUE;
case MAKELANGID (LANG_SERBIAN, SUBLANG_SERBIAN_CYRILLIC):
return TRUE;
case MAKELANGID (LANG_SERBIAN, 0x07):
/* Serbian in Bosnia and Herzegovina, Cyrillic */
return TRUE;
}
}
else if (strcmp (script_to_check, "Cyrl") == 0)
{
switch (LANGIDFROMLCID (lcid))
{
case MAKELANGID (LANG_AZERI, SUBLANG_AZERI_LATIN):
return TRUE;
case MAKELANGID (LANG_UZBEK, SUBLANG_UZBEK_LATIN):
return TRUE;
case MAKELANGID (LANG_SERBIAN, SUBLANG_SERBIAN_LATIN):
return TRUE;
case MAKELANGID (LANG_SERBIAN, 0x06):
/* Serbian in Bosnia and Herzegovina, Latin */
return TRUE;
}
}
}
SetThreadLocale (lcid);
if (GetLocaleInfo (lcid, LOCALE_SENGLANGUAGE, language, sizeof (language)) &&
GetLocaleInfo (lcid, LOCALE_SENGCOUNTRY, country, sizeof (country)))
{
strcpy (locale, language);
strcat (locale, "_");
strcat (locale, country);
if (setlocale (LC_ALL, locale) != NULL)
setlocale_called = TRUE;
}
return FALSE;
}
}
return TRUE;
}
#endif
static void
setlocale_initialization (void)
{
static gboolean initialized = FALSE;
if (initialized)
return;
initialized = TRUE;
if (do_setlocale)
{
#ifdef G_OS_WIN32
/* If some of the POSIXish environment variables are set, set
* the Win32 thread locale correspondingly.
*/
char *p = getenv ("LC_ALL");
if (p == NULL)
p = getenv ("LANG");
if (p != NULL)
{
p = g_strdup (p);
if (strcmp (p, "C") == 0)
SetThreadLocale (LOCALE_SYSTEM_DEFAULT);
else
{
/* Check if one of the supported locales match the
* environment variable. If so, use that locale.
*/
iso639_to_check = p;
iso3166_to_check = strchr (iso639_to_check, '_');
if (iso3166_to_check != NULL)
{
*iso3166_to_check++ = '\0';
script_to_check = strchr (iso3166_to_check, '@');
if (script_to_check != NULL)
*script_to_check++ = '\0';
/* Handle special cases. */
/* The standard code for Serbia and Montenegro was
* "CS", but MSFT uses for some reason "SP". By now
* (October 2006), SP has split into two, "RS" and
* "ME", but don't bother trying to handle those
* yet. Do handle the even older "YU", though.
*/
if (strcmp (iso3166_to_check, "CS") == 0 ||
strcmp (iso3166_to_check, "YU") == 0)
iso3166_to_check = "SP";
}
else
{
script_to_check = strchr (iso639_to_check, '@');
if (script_to_check != NULL)
*script_to_check++ = '\0';
/* LANG_SERBIAN == LANG_CROATIAN, recognize just "sr" */
if (strcmp (iso639_to_check, "sr") == 0)
iso3166_to_check = "SP";
}
EnumSystemLocales (enum_locale_proc, LCID_SUPPORTED);
}
g_free (p);
}
if (!setlocale_called)
setlocale (LC_ALL, "");
#else
if (!setlocale (LC_ALL, ""))
g_warning ("Locale not supported by C library.\n\tUsing the fallback 'C' locale.");
#endif
}
}
static void
check_mixed_deps (void)
{
GModule *module;
gpointer func;
module = g_module_open (NULL, 0);
if (g_module_symbol (module, "gtk_progress_get_type", &func))
{
g_error ("GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported");
}
g_module_close (module);
}
static void
do_pre_parse_initialization (int *argc,
char ***argv)
{
const gchar *env_string;
if (pre_initialized)
return;
pre_initialized = TRUE;
check_mixed_deps ();
gdk_pre_parse_libgtk_only ();
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,
G_N_ELEMENTS (gtk_debug_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);
}
static void
gettext_initialization (void)
{
setlocale_initialization ();
#ifdef ENABLE_NLS
bindtextdomain (GETTEXT_PACKAGE, GTK_LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE "-properties", GTK_LOCALEDIR);
# ifdef HAVE_BIND_TEXTDOMAIN_CODESET
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
bind_textdomain_codeset (GETTEXT_PACKAGE "-properties", "UTF-8");
# endif
#endif
}
static void
do_post_parse_initialization (int *argc,
char ***argv)
{
if (gtk_initialized)
return;
gettext_initialization ();
#ifdef SIGPIPE
signal (SIGPIPE, SIG_IGN);
#endif
if (g_fatal_warnings)
{
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);
}
if (gtk_debug_flags & GTK_DEBUG_UPDATES)
gdk_window_set_debug_updates (TRUE);
{
/* 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");
}
/* do what the call to gtk_type_init() used to do */
g_type_init ();
_gtk_accel_map_init ();
_gtk_rc_init ();
/* Set the 'initialized' flag.
*/
gtk_initialized = TRUE;
/* load gtk modules */
if (gtk_modules_string)
{
_gtk_modules_init (argc, argv, gtk_modules_string->str);
g_string_free (gtk_modules_string, TRUE);
}
else
{
_gtk_modules_init (argc, argv, NULL);
}
}
typedef struct
{
gboolean open_default_display;
} OptionGroupInfo;
static gboolean
pre_parse_hook (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error)
{
do_pre_parse_initialization (NULL, NULL);
return TRUE;
}
static gboolean
post_parse_hook (GOptionContext *context,
GOptionGroup *group,
gpointer data,
GError **error)
{
OptionGroupInfo *info = data;
do_post_parse_initialization (NULL, NULL);
if (info->open_default_display)
{
if (gdk_display_open_default_libgtk_only () == NULL)
{
const char *display_name = gdk_get_display_arg_name ();
g_set_error (error,
G_OPTION_ERROR,
G_OPTION_ERROR_FAILED,
_("Cannot open display: %s"),
display_name ? display_name : "" );
return FALSE;
}
}
return TRUE;
}
/**
* gtk_get_option_group:
* @open_default_display: whether to open the default display
* when parsing the commandline arguments
*
* Returns a #GOptionGroup for the commandline arguments recognized
* by GTK+ and GDK. You should add this group to your #GOptionContext
* with g_option_context_add_group(), if you are using
* g_option_context_parse() to parse your commandline arguments.
*
* Returns: a #GOptionGroup for the commandline arguments recognized
* by GTK+
*
* Since: 2.6
*/
GOptionGroup *
gtk_get_option_group (gboolean open_default_display)
{
GOptionGroup *group;
OptionGroupInfo *info;
gettext_initialization ();
info = g_new0 (OptionGroupInfo, 1);
info->open_default_display = open_default_display;
group = g_option_group_new ("gtk", _("GTK+ Options"), _("Show GTK+ Options"), info, g_free);
g_option_group_set_parse_hooks (group, pre_parse_hook, post_parse_hook);
gdk_add_option_entries_libgtk_only (group);
g_option_group_add_entries (group, gtk_args);
g_option_group_set_translation_domain (group, GETTEXT_PACKAGE);
return group;
}
/**
* gtk_init_with_args:
* @argc: a pointer to the number of command line arguments.
* @argv: a pointer to the array of command line arguments.
* @parameter_string: a string which is displayed in
* the first line of <option>--help</option> output, after
* <literal><replaceable>programname</replaceable> [OPTION...]</literal>
* @entries: a %NULL-terminated array of #GOptionEntry<!-- -->s
* describing the options of your program
* @translation_domain: a translation domain to use for translating
* the <option>--help</option> output for the options in @entries
* with gettext(), or %NULL
* @error: a return location for errors
*
* This function does the same work as gtk_init_check().
* Additionally, it allows you to add your own commandline options,
* and it automatically generates nicely formatted
* <option>--help</option> output. Note that your program will
* be terminated after writing out the help output.
*
* Returns: %TRUE if the GUI has been successfully initialized,
* %FALSE otherwise.
*
* Since: 2.6
*/
gboolean
gtk_init_with_args (gint *argc,
gchar ***argv,
const gchar *parameter_string,
const GOptionEntry *entries,
const gchar *translation_domain,
GError **error)
{
GOptionContext *context;
GOptionGroup *gtk_group;
gboolean retval;
if (gtk_initialized)
return gdk_display_open_default_libgtk_only () != NULL;
gettext_initialization ();
if (!check_setugid ())
return FALSE;
gtk_group = gtk_get_option_group (TRUE);
context = g_option_context_new (parameter_string);
g_option_context_add_group (context, gtk_group);
if (entries)
g_option_context_add_main_entries (context, entries, translation_domain);
retval = g_option_context_parse (context, argc, argv, error);
g_option_context_free (context);
return retval;
}
/**
* gtk_parse_args:
* @argc: (inout): a pointer to the number of command line arguments.
* @argv: (array) (inout): 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)
{
GOptionContext *option_context;
GOptionGroup *gtk_group;
GError *error = NULL;
if (gtk_initialized)
return TRUE;
gettext_initialization ();
if (!check_setugid ())
return FALSE;
option_context = g_option_context_new (NULL);
g_option_context_set_ignore_unknown_options (option_context, TRUE);
g_option_context_set_help_enabled (option_context, FALSE);
gtk_group = gtk_get_option_group (FALSE);
g_option_context_set_main_group (option_context, gtk_group);
if (!g_option_context_parse (option_context, argc, argv, &error))
{
g_warning ("%s", error->message);
g_error_free (error);
}
g_option_context_free (option_context);
return TRUE;
}
#ifdef G_PLATFORM_WIN32
#undef gtk_init_check
#endif
/**
* gtk_init_check:
* @argc: (inout): Address of the <parameter>argc</parameter> parameter of your
* main() function. Changed if any arguments were handled.
* @argv: (array length=argc) (inout) (allow-none): 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;
}
#ifdef G_PLATFORM_WIN32
#undef gtk_init
#endif
/**
* gtk_init:
* @argc: (inout): Address of the <parameter>argc</parameter> parameter of your
* main() function. Changed if any arguments were handled.
* @argv: (array length=argc) (inout) (allow-none): 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 that there are some alternative ways to initialize GTK+:
* if you are calling gtk_parse_args(), gtk_init_check(),
* gtk_init_with_args() or g_option_context_parse() with
* the option group returned by gtk_get_option_group(), you
* <emphasis>don't</emphasis> have to call gtk_init().
*
* <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>
*
* <note><para>
* Since 2.18, GTK+ calls <literal>signal (SIGPIPE, SIG_IGN)</literal>
* during initialization, to ignore SIGPIPE signals, since these are
* almost never wanted in graphical applications. If you do need to
* handle SIGPIPE for some reason, reset the handler after gtk_init(),
* but notice that other libraries (e.g. libdbus or gvfs) might do
* similar things.
* </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 ();
if (display_name_arg == NULL)
display_name_arg = getenv("DISPLAY");
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 -mms-bitfields switch,\n"
"or that you are using 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 -mms-bitfields switch,\n"
"or that you are using 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
/**
* 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.
*
* This function is equivalent to pango_language_get_default(). See
* that function for details.
*
* Return value: the default language as a #PangoLanguage, must not be
* freed
**/
PangoLanguage *
gtk_get_default_language (void)
{
return pango_language_get_default ();
}
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--;
if (gtk_main_loop_level == 0)
{
/* Try storing all clipboard data we have */
_gtk_clipboard_store_all ();
/* Synchronize the recent manager singleton */
_gtk_recent_manager_sync ();
}
}
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);
}
gboolean
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_device_grab_info_libgtk_only (GdkDisplay *display,
GdkDevice *device,
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;
gpointer grab_widget_ptr;
gboolean owner_events;
GdkDisplay *display;
GdkDevice *device;
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:
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
display = gdk_drawable_get_display (event->any.window);
device = gdk_event_get_device (event);
if (!gdk_device_grab_info_libgtk_only (display, device, &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, &grab_widget_ptr);
grab_widget = grab_widget_ptr;
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 = NULL;
GtkWindowGroup *window_group;
GdkEvent *rewritten_event = NULL;
GdkDevice *device;
GList *tmp_list;
if (event->type == GDK_SETTING)
{
_gtk_settings_handle_event (&event->setting);
return;
}
if (event->type == GDK_OWNER_CHANGE)
{
_gtk_clipboard_handle_event (&event->owner_change);
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);
device = gdk_event_get_device (event);
/* check whether there is a (device) grab in effect...
*/
if (device)
grab_widget = gtk_window_group_get_current_device_grab (window_group, device);
if (!grab_widget && 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 (!grab_widget ||
(gtk_widget_is_sensitive (event_widget) &&
gtk_widget_is_ancestor (event_widget, grab_widget)))
grab_widget = event_widget;
/* If the widget receiving events is actually blocked by another device GTK+ grab */
if (device &&
_gtk_window_group_widget_is_blocked_for_device (window_group, grab_widget, device))
{
if (rewritten_event)
gdk_event_free (rewritten_event);
return;
}
/* Push the event onto a stack of current events for
* gtk_current_event_get().
*/
current_events = g_list_prepend (current_events, event);
/* 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_get_realized (event_widget))
gtk_widget_destroy (event_widget);
g_object_unref (event_widget);
}
break;
case GDK_EXPOSE:
if (event->any.window && gtk_widget_get_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
{
/* The app may paint with a previously allocated cairo_t,
which will draw directly to the window. We can't catch cairo
drap operatoins to automatically flush the window, thus we
need to explicitly flush any outstanding moves or double
buffering */
gdk_window_flush (event->any.window);
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:
case GDK_GRAB_BROKEN:
case GDK_DAMAGE:
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;
}
/* Catch alt press to enable auto-mnemonics;
* menus are handled elsewhere
*/
if ((event->key.keyval == GDK_Alt_L || event->key.keyval == GDK_Alt_R) &&
!GTK_IS_MENU_SHELL (grab_widget))
{
gboolean auto_mnemonics;
g_object_get (gtk_widget_get_settings (grab_widget),
"gtk-auto-mnemonics", &auto_mnemonics, NULL);
if (auto_mnemonics)
{
gboolean mnemonics_visible;
GtkWidget *window;
mnemonics_visible = (event->type == GDK_KEY_PRESS);
window = gtk_widget_get_toplevel (grab_widget);
if (GTK_IS_WINDOW (window))
gtk_window_set_mnemonics_visible (GTK_WINDOW (window), mnemonics_visible);
}
}
/* 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:
_gtk_widget_set_device_window (event_widget,
gdk_event_get_device (event),
event->any.window);
if (gtk_widget_is_sensitive (grab_widget))
gtk_widget_event (grab_widget, event);
break;
case GDK_LEAVE_NOTIFY:
_gtk_widget_set_device_window (event_widget,
gdk_event_get_device (event),
NULL);
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;
}
if (event->type == GDK_ENTER_NOTIFY
|| event->type == GDK_LEAVE_NOTIFY
|| event->type == GDK_BUTTON_PRESS
|| event->type == GDK_2BUTTON_PRESS
|| event->type == GDK_3BUTTON_PRESS
|| event->type == GDK_KEY_PRESS
|| event->type == GDK_DRAG_ENTER
|| event->type == GDK_GRAB_BROKEN
|| event->type == GDK_MOTION_NOTIFY
|| event->type == GDK_SCROLL)
{
_gtk_tooltip_handle_event (event);
}
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 (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;
gboolean was_grabbed;
gboolean is_grabbed;
gboolean from_grab;
GList *notified_windows;
GdkDevice *device;
} GrabNotifyInfo;
static void
synth_crossing_for_grab_notify (GtkWidget *from,
GtkWidget *to,
GrabNotifyInfo *info,
GList *devices,
GdkCrossingMode mode)
{
while (devices)
{
GdkDevice *device = devices->data;
GdkWindow *from_window, *to_window;
/* Do not propagate events more than once to
* the same windows if non-multidevice aware.
*/
if (!from)
from_window = NULL;
else
{
from_window = _gtk_widget_get_device_window (from, device);
if (from_window &&
!gdk_window_get_support_multidevice (from_window) &&
g_list_find (info->notified_windows, from_window))
from_window = NULL;
}
if (!to)
to_window = NULL;
else
{
to_window = _gtk_widget_get_device_window (to, device);
if (to_window &&
!gdk_window_get_support_multidevice (to_window) &&
g_list_find (info->notified_windows, to_window))
to_window = NULL;
}
if (from_window || to_window)
{
_gtk_widget_synthesize_crossing ((from_window) ? from : NULL,
(to_window) ? to : NULL,
device, mode);
if (from_window)
info->notified_windows = g_list_prepend (info->notified_windows, from_window);
if (to_window)
info->notified_windows = g_list_prepend (info->notified_windows, to_window);
}
devices = devices->next;
}
}
static void
gtk_grab_notify_foreach (GtkWidget *child,
gpointer data)
{
GrabNotifyInfo *info = data;
gboolean was_grabbed, is_grabbed, was_shadowed, is_shadowed;
GList *devices;
was_grabbed = info->was_grabbed;
is_grabbed = info->is_grabbed;
info->was_grabbed = info->was_grabbed || (child == info->old_grab_widget);
info->is_grabbed = info->is_grabbed || (child == info->new_grab_widget);
was_shadowed = info->old_grab_widget && !info->was_grabbed;
is_shadowed = info->new_grab_widget && !info->is_grabbed;
g_object_ref (child);
if ((was_shadowed || is_shadowed) && GTK_IS_CONTAINER (child))
gtk_container_forall (GTK_CONTAINER (child), gtk_grab_notify_foreach, info);
if (info->device &&
_gtk_widget_get_device_window (child, info->device))
{
/* Device specified and is on widget */
devices = g_list_prepend (NULL, info->device);
}
else
devices = _gtk_widget_list_devices (child);
if (is_shadowed)
{
GTK_PRIVATE_SET_FLAG (child, GTK_SHADOWED);
if (!was_shadowed && devices &&
gtk_widget_is_sensitive (child))
synth_crossing_for_grab_notify (child, info->new_grab_widget,
info, devices,
GDK_CROSSING_GTK_GRAB);
}
else
{
GTK_PRIVATE_UNSET_FLAG (child, GTK_SHADOWED);
if (was_shadowed && devices &&
gtk_widget_is_sensitive (child))
synth_crossing_for_grab_notify (info->old_grab_widget, child,
info, devices,
info->from_grab ? GDK_CROSSING_GTK_GRAB :
GDK_CROSSING_GTK_UNGRAB);
}
if (was_shadowed != is_shadowed)
_gtk_widget_grab_notify (child, was_shadowed);
g_object_unref (child);
g_list_free (devices);
info->was_grabbed = was_grabbed;
info->is_grabbed = is_grabbed;
}
static void
gtk_grab_notify (GtkWindowGroup *group,
GdkDevice *device,
GtkWidget *old_grab_widget,
GtkWidget *new_grab_widget,
gboolean from_grab)
{
GList *toplevels;
GrabNotifyInfo info = { 0 };
if (old_grab_widget == new_grab_widget)
return;
info.old_grab_widget = old_grab_widget;
info.new_grab_widget = new_grab_widget;
info.from_grab = from_grab;
info.device = device;
g_object_ref (group);
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);
info.was_grabbed = FALSE;
info.is_grabbed = FALSE;
if (group == gtk_window_get_group (toplevel))
gtk_grab_notify_foreach (GTK_WIDGET (toplevel), &info);
g_object_unref (toplevel);
}
g_list_free (info.notified_windows);
g_object_unref (group);
}
void
gtk_grab_add (GtkWidget *widget)
{
GtkWindowGroup *group;
GtkWidget *old_grab_widget;
g_return_if_fail (widget != NULL);
if (!gtk_widget_has_grab (widget) && gtk_widget_is_sensitive (widget))
{
_gtk_widget_set_has_grab (widget, TRUE);
group = gtk_main_get_window_group (widget);
if (group->grabs)
old_grab_widget = (GtkWidget *)group->grabs->data;
else
old_grab_widget = NULL;
g_object_ref (widget);
group->grabs = g_slist_prepend (group->grabs, widget);
gtk_grab_notify (group, NULL, old_grab_widget, widget, TRUE);
}
}
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;
GtkWidget *new_grab_widget;
g_return_if_fail (widget != NULL);
if (gtk_widget_has_grab (widget))
{
_gtk_widget_set_has_grab (widget, FALSE);
group = gtk_main_get_window_group (widget);
group->grabs = g_slist_remove (group->grabs, widget);
if (group->grabs)
new_grab_widget = (GtkWidget *)group->grabs->data;
else
new_grab_widget = NULL;
gtk_grab_notify (group, NULL, widget, new_grab_widget, FALSE);
g_object_unref (widget);
}
}
/**
* gtk_device_grab_add:
* @widget: a #GtkWidget
* @device: a #GtkDevice to grab on.
* @block_others: %TRUE to prevent other devices to interact with @widget.
*
* Adds a GTK+ grab on @device, so all the events on @device and its
* associated pointer or keyboard (if any) are delivered to @widget.
* If the @block_others parameter is %TRUE, any other devices will be
* unable to interact with @widget during the grab.
*
* Since: 3.0
**/
void
gtk_device_grab_add (GtkWidget *widget,
GdkDevice *device,
gboolean block_others)
{
GtkWindowGroup *group;
GtkWidget *old_grab_widget;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GDK_IS_DEVICE (device));
group = gtk_main_get_window_group (widget);
old_grab_widget = gtk_window_group_get_current_device_grab (group, device);
if (old_grab_widget != widget)
_gtk_window_group_add_device_grab (group, widget, device, block_others);
gtk_grab_notify (group, device, old_grab_widget, widget, TRUE);
}
/**
* gtk_device_grab_remove:
* @widget: a #GtkWidget
* @device: a #GdkDevice
*
* Removes a device grab from the given widget. You have to pair calls
* to gtk_device_grab_add() and gtk_device_grab_remove().
*
* Since: 3.0
**/
void
gtk_device_grab_remove (GtkWidget *widget,
GdkDevice *device)
{
GtkWindowGroup *group;
GtkWidget *new_grab_widget;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GDK_IS_DEVICE (device));
group = gtk_main_get_window_group (widget);
_gtk_window_group_remove_device_grab (group, widget, device);
new_grab_widget = gtk_window_group_get_current_device_grab (group, device);
gtk_grab_notify (group, device, widget, new_grab_widget, FALSE);
}
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);
g_free (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,
GDestroyNotify destroy)
{
static guint quit_id = 1;
GtkQuitFunction *quitf;
g_return_val_if_fail ((function != NULL) || (marshal != NULL), 0);
quitf = g_slice_new (GtkQuitFunction);
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_slice_free (GtkQuitFunction, 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;
}
}
/**
* 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_current_event_device:
*
* If there is a current event and it has a device, return that
* device, otherwise return %NULL.
*
* Returns: a #GdkDevice, or %NULL
**/
GdkDevice *
gtk_get_current_event_device (void)
{
if (current_events)
return gdk_event_get_device (current_events->data);
else
return NULL;
}
/**
* 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;
gpointer widget_ptr;
widget = NULL;
if (event && event->any.window &&
(event->type == GDK_DESTROY || !GDK_WINDOW_DESTROYED (event->any.window)))
{
gdk_window_get_user_data (event->any.window, &widget_ptr);
widget = widget_ptr;
}
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 (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 (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;
/* Scroll events are special cased here because it
* feels wrong when scrolling a GtkViewport, say,
* to have children of the viewport eat the scroll
* event
*/
if (!gtk_widget_is_sensitive (widget))
handled_event = event->type != GDK_SCROLL;
else
handled_event = 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);
}
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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