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Accelerator Groups

Accelerator Groups — Groups of global keyboard accelerators for an entire GtkWindow

Types and Values

Object Hierarchy

    GObject
    ╰── GtkAccelGroup

Includes

#include <gtk/gtk.h>

Description

A GtkAccelGroup represents a group of keyboard accelerators, typically attached to a toplevel GtkWindow (with gtk_window_add_accel_group()). Usually you won't need to create a GtkAccelGroup directly; instead, when using GtkItemFactory, GTK+ automatically sets up the accelerators for your menus in the item factory's GtkAccelGroup.

Note that accelerators are different from mnemonics. Accelerators are shortcuts for activating a menu item; they appear alongside the menu item they're a shortcut for. For example "Ctrl+Q" might appear alongside the "Quit" menu item. Mnemonics are shortcuts for GUI elements such as text entries or buttons; they appear as underlined characters. See gtk_label_new_with_mnemonic(). Menu items can have both accelerators and mnemonics, of course.

Functions

gtk_accel_group_new ()

GtkAccelGroup *
gtk_accel_group_new (void);

Creates a new GtkAccelGroup.

Parameters

returns

a new GtkAccelGroup object

 

gtk_accel_group_connect ()

void
gtk_accel_group_connect (GtkAccelGroup *accel_group,
                         guint accel_key,
                         GdkModifierType accel_mods,
                         GtkAccelFlags accel_flags,
                         GClosure *closure);

Installs an accelerator in this group. When accel_group is being activated in response to a call to gtk_accel_groups_activate(), closure will be invoked if the accel_key and accel_mods from gtk_accel_groups_activate() match those of this connection.

The signature used for the closure is that of GtkAccelGroupActivate.

Note that, due to implementation details, a single closure can only be connected to one accelerator group.

Parameters

accel_group

the accelerator group to install an accelerator in

 

accel_key

key value of the accelerator

 

accel_mods

modifier combination of the accelerator

 

accel_flags

a flag mask to configure this accelerator

 

closure

closure to be executed upon accelerator activation

 

gtk_accel_group_connect_by_path ()

void
gtk_accel_group_connect_by_path (GtkAccelGroup *accel_group,
                                 const gchar *accel_path,
                                 GClosure *closure);

Installs an accelerator in this group, using an accelerator path to look up the appropriate key and modifiers (see gtk_accel_map_add_entry()). When accel_group is being activated in response to a call to gtk_accel_groups_activate(), closure will be invoked if the accel_key and accel_mods from gtk_accel_groups_activate() match the key and modifiers for the path.

The signature used for the closure is that of GtkAccelGroupActivate.

Note that accel_path string will be stored in a GQuark. Therefore, if you pass a static string, you can save some memory by interning it first with g_intern_static_string().

Parameters

accel_group

the accelerator group to install an accelerator in

 

accel_path

path used for determining key and modifiers.

 

closure

closure to be executed upon accelerator activation

 

GtkAccelGroupActivate ()

gboolean
(*GtkAccelGroupActivate) (GtkAccelGroup *accel_group,
                          GObject *acceleratable,
                          guint keyval,
                          GdkModifierType modifier);

GtkAccelGroupFindFunc ()

gboolean
(*GtkAccelGroupFindFunc) (GtkAccelKey *key,
                          GClosure *closure,
                          gpointer data);

Since: 2.2


gtk_accel_group_disconnect ()

gboolean
gtk_accel_group_disconnect (GtkAccelGroup *accel_group,
                            GClosure *closure);

Removes an accelerator previously installed through gtk_accel_group_connect().

Since 2.20 closure can be NULL.

Parameters

accel_group

the accelerator group to remove an accelerator from

 

closure

the closure to remove from this accelerator group, or NULL to remove all closures.

[allow-none]

returns

TRUE if the closure was found and got disconnected

 

gtk_accel_group_disconnect_key ()

gboolean
gtk_accel_group_disconnect_key (GtkAccelGroup *accel_group,
                                guint accel_key,
                                GdkModifierType accel_mods);

Removes an accelerator previously installed through gtk_accel_group_connect().

Parameters

accel_group

the accelerator group to install an accelerator in

 

accel_key

key value of the accelerator

 

accel_mods

modifier combination of the accelerator

 

returns

TRUE if there was an accelerator which could be removed, FALSE otherwise

 

gtk_accel_group_query ()

GtkAccelGroupEntry *
gtk_accel_group_query (GtkAccelGroup *accel_group,
                       guint accel_key,
                       GdkModifierType accel_mods,
                       guint *n_entries);

Queries an accelerator group for all entries matching accel_key and accel_mods .

Parameters

accel_group

the accelerator group to query

 

accel_key

key value of the accelerator

 

accel_mods

modifier combination of the accelerator

 

n_entries

location to return the number of entries found, or NULL.

[allow-none]

returns

an array of n_entries GtkAccelGroupEntry elements, or NULL. The array is owned by GTK+ and must not be freed.

[allow-none]

gtk_accel_group_activate ()

gboolean
gtk_accel_group_activate (GtkAccelGroup *accel_group,
                          GQuark accel_quark,
                          GObject *acceleratable,
                          guint accel_key,
                          GdkModifierType accel_mods);

Finds the first accelerator in accel_group that matches accel_key and accel_mods , and activates it.

Parameters

accel_group

a GtkAccelGroup

 

accel_quark

the quark for the accelerator name

 

acceleratable

the GObject, usually a GtkWindow, on which to activate the accelerator.

 

accel_key

accelerator keyval from a key event

 

accel_mods

keyboard state mask from a key event

 

Returns

TRUE if an accelerator was activated and handled this keypress


gtk_accel_group_lock ()

void
gtk_accel_group_lock (GtkAccelGroup *accel_group);

Locks the given accelerator group.

Locking an acelerator group prevents the accelerators contained within it to be changed during runtime. Refer to gtk_accel_map_change_entry() about runtime accelerator changes.

If called more than once, accel_group remains locked until gtk_accel_group_unlock() has been called an equivalent number of times.

Parameters

accel_group

a GtkAccelGroup

 

gtk_accel_group_unlock ()

void
gtk_accel_group_unlock (GtkAccelGroup *accel_group);

Undoes the last call to gtk_accel_group_lock() on this accel_group .

Parameters

accel_group

a GtkAccelGroup

 

gtk_accel_group_get_is_locked ()

gboolean
gtk_accel_group_get_is_locked (GtkAccelGroup *accel_group);

Locks are added and removed using gtk_accel_group_lock() and gtk_accel_group_unlock().

Parameters

accel_group

a GtkAccelGroup

 

Returns

TRUE if there are 1 or more locks on the accel_group , FALSE otherwise.

Since: 2.14


gtk_accel_group_from_accel_closure ()

GtkAccelGroup *
gtk_accel_group_from_accel_closure (GClosure *closure);

Finds the GtkAccelGroup to which closure is connected; see gtk_accel_group_connect().

Parameters

closure

a GClosure

 

returns

the GtkAccelGroup to which closure is connected, or NULL.

[transfer none]

gtk_accel_group_get_modifier_mask ()

GdkModifierType
gtk_accel_group_get_modifier_mask (GtkAccelGroup *accel_group);

Gets a GdkModifierType representing the mask for this accel_group . For example, GDK_CONTROL_MASK, GDK_SHIFT_MASK, etc.

Parameters

accel_group

a GtkAccelGroup

 

Returns

the modifier mask for this accel group.

Since: 2.14


gtk_accel_groups_activate ()

gboolean
gtk_accel_groups_activate (GObject *object,
                           guint accel_key,
                           GdkModifierType accel_mods);

Finds the first accelerator in any GtkAccelGroup attached to object that matches accel_key and accel_mods , and activates that accelerator.

Parameters

object

the GObject, usually a GtkWindow, on which to activate the accelerator.

 

accel_key

accelerator keyval from a key event

 

accel_mods

keyboard state mask from a key event

 

Returns

TRUE if an accelerator was activated and handled this keypress


gtk_accel_groups_from_object ()

GSList *
gtk_accel_groups_from_object (GObject *object);

Gets a list of all accel groups which are attached to object .

Parameters

object

a GObject, usually a GtkWindow

 

Returns

a list of all accel groups which are attached to object .

[element-type GtkAccelGroup][transfer none]


gtk_accel_group_find ()

GtkAccelKey *
gtk_accel_group_find (GtkAccelGroup *accel_group,
                      GtkAccelGroupFindFunc find_func,
                      gpointer data);

Finds the first entry in an accelerator group for which find_func returns TRUE and returns its GtkAccelKey.

Parameters

accel_group

a GtkAccelGroup

 

find_func

a function to filter the entries of accel_group with

 

data

data to pass to find_func

 

returns

the key of the first entry passing find_func . The key is owned by GTK+ and must not be freed.

[transfer none]

gtk_accelerator_valid ()

gboolean
gtk_accelerator_valid (guint keyval,
                       GdkModifierType modifiers);

Determines whether a given keyval and modifier mask constitute a valid keyboard accelerator. For example, the GDK_a keyval plus GDK_CONTROL_MASK is valid - this is a "Ctrl+a" accelerator. But, you can't, for instance, use the GDK_Control_L keyval as an accelerator.

Parameters

keyval

a GDK keyval

 

modifiers

modifier mask

 

returns

TRUE if the accelerator is valid

 

gtk_accelerator_parse ()

void
gtk_accelerator_parse (const gchar *accelerator,
                       guint *accelerator_key,
                       GdkModifierType *accelerator_mods);

Parses a string representing an accelerator. The format looks like "<Control>a" or "<Shift><Alt>F1" or "<Release>z" (the last one is for key release). The parser is fairly liberal and allows lower or upper case, and also abbreviations such as "<Ctl>" and "<Ctrl>". Key names are parsed using gdk_keyval_from_name(). For character keys the name is not the symbol, but the lowercase name, e.g. one would use "<Ctrl>minus" instead of "<Ctrl>-".

If the parse fails, accelerator_key and accelerator_mods will be set to 0 (zero).

Parameters

accelerator

string representing an accelerator

 

accelerator_key

return location for accelerator keyval.

[out][allow-none]

accelerator_mods

return location for accelerator modifier mask.

[out][allow-none]

gtk_accelerator_name ()

gchar *
gtk_accelerator_name (guint accelerator_key,
                      GdkModifierType accelerator_mods);

Converts an accelerator keyval and modifier mask into a string parseable by gtk_accelerator_parse(). For example, if you pass in GDK_q and GDK_CONTROL_MASK, this function returns "<Control>q".

If you need to display accelerators in the user interface, see gtk_accelerator_get_label().

Parameters

accelerator_key

accelerator keyval

 

accelerator_mods

accelerator modifier mask

 

Returns

a newly-allocated accelerator name


gtk_accelerator_get_label ()

gchar *
gtk_accelerator_get_label (guint accelerator_key,
                           GdkModifierType accelerator_mods);

Converts an accelerator keyval and modifier mask into a string which can be used to represent the accelerator to the user.

Parameters

accelerator_key

accelerator keyval

 

accelerator_mods

accelerator modifier mask

 

Returns

a newly-allocated string representing the accelerator.

Since: 2.6


gtk_accelerator_set_default_mod_mask ()

void
gtk_accelerator_set_default_mod_mask (GdkModifierType default_mod_mask);

Sets the modifiers that will be considered significant for keyboard accelerators. The default mod mask is GDK_CONTROL_MASK | GDK_SHIFT_MASK | GDK_MOD1_MASK | GDK_SUPER_MASK | GDK_HYPER_MASK | GDK_META_MASK, that is, Control, Shift, Alt, Super, Hyper and Meta. Other modifiers will by default be ignored by GtkAccelGroup. You must include at least the three modifiers Control, Shift and Alt in any value you pass to this function.

The default mod mask should be changed on application startup, before using any accelerator groups.

Parameters

default_mod_mask

accelerator modifier mask

 

gtk_accelerator_get_default_mod_mask ()

guint
gtk_accelerator_get_default_mod_mask (void);

Gets the value set by gtk_accelerator_set_default_mod_mask().

Parameters

returns

the default accelerator modifier mask

 

Types and Values

struct GtkAccelGroup

struct GtkAccelGroup;

An object representing and maintaining a group of accelerators.


gtk_accel_group_ref

#define gtk_accel_group_ref g_object_ref

gtk_accel_group_ref is deprecated and should not be used in newly-written code.

Deprecated equivalent of g_object_ref().

Returns

the accel group that was passed in


gtk_accel_group_unref

#define gtk_accel_group_unref g_object_unref

gtk_accel_group_unref is deprecated and should not be used in newly-written code.

Deprecated equivalent of g_object_unref().


struct GtkAccelKey

struct GtkAccelKey {
  guint           accel_key;
  GdkModifierType accel_mods;
  guint           accel_flags : 16;
};

Property Details

The “is-locked” property

  “is-locked”                gboolean

Is the accel group locked.

Flags: Read

Default value: FALSE


The “modifier-mask” property

  “modifier-mask”            GdkModifierType

Modifier Mask.

Flags: Read

Default value: GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK | GDK_SUPER_MASK | GDK_HYPER_MASK | GDK_META_MASK

Signal Details

The “accel-activate” signal

gboolean
user_function (GtkAccelGroup  *accel_group,
               GObject        *acceleratable,
               guint           keyval,
               GdkModifierType modifier,
               gpointer        user_data)

The accel-activate signal is an implementation detail of GtkAccelGroup and not meant to be used by applications.

Parameters

accel_group

the GtkAccelGroup which received the signal

 

acceleratable

the object on which the accelerator was activated

 

keyval

the accelerator keyval

 

modifier

the modifier combination of the accelerator

 

user_data

user data set when the signal handler was connected.

 

Returns

TRUE if the accelerator was activated

Flags: Has Details


The “accel-changed” signal

void
user_function (GtkAccelGroup  *accel_group,
               guint           keyval,
               GdkModifierType modifier,
               GClosure       *accel_closure,
               gpointer        user_data)

The accel-changed signal is emitted when a GtkAccelGroupEntry is added to or removed from the accel group.

Widgets like GtkAccelLabel which display an associated accelerator should connect to this signal, and rebuild their visual representation if the accel_closure is theirs.

Parameters

accel_group

the GtkAccelGroup which received the signal

 

keyval

the accelerator keyval

 

modifier

the modifier combination of the accelerator

 

accel_closure

the GClosure of the accelerator

 

user_data

user data set when the signal handler was connected.

 

Flags: Has Details

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