gtkmm: Gtk::AccelGroup Class Reference

gtkmm 3.15.4

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Gtk::AccelGroup Class Reference

A Gtk::AccelGroup represents a group of keyboard accelerators, typically attached to a toplevel Gtk::Window (with Gtk::Window::add_accel_group()). More...

`#include <gtkmm/accelgroup.h>`

Inheritance diagram for Gtk::AccelGroup:
[legend]

## Public Member Functions
virtual | ~AccelGroup ()
GtkAccelGroup* | gobj ()
| Provides access to the underlying C GObject. More...
const GtkAccelGroup* | gobj () const
| Provides access to the underlying C GObject. More...
GtkAccelGroup* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
bool | get_is_locked () const
| Locks are added and removed using lock() and unlock(). More...
Gdk::ModifierType | get_modifier_mask () const
| Gets a Gdk::ModifierType representing the mask for this accel_group. More...
void | lock ()
| Locks the given accelerator group. More...
void | unlock ()
| Undoes the last call to lock() on this accel_group. More...
bool | disconnect_key (guint accel_key, Gdk::ModifierType accel_mods)
| Removes an accelerator previously installed through connect(). More...
bool | activate (GQuark accel_quark, const Glib::RefPtr< Glib::Object >& acceleratable, guint accel_key, Gdk::ModifierType accel_mods)
| Finds the first accelerator in accel_group that matches accel_key and accel_mods, and activates it. More...
Glib::SignalProxy3< bool, const Glib::RefPtr < Glib::Object > &, guint, Gdk::ModifierType > | signal_accel_activate ()
Glib::SignalProxy3< void, guint, Gdk::ModifierType, GClosure* > | signal_accel_changed ()
Glib::PropertyProxy_ReadOnly < bool > | property_is_locked () const
| Is the accel group locked. More...
Glib::PropertyProxy_ReadOnly < Gdk::ModifierType > | property_modifier_mask () const
| Modifier Mask. More...

## Static Public Member Functions
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< AccelGroup > | create ()
| Creates a new Gtk::AccelGroup object. More...
static bool | valid (guint keyval, Gdk::ModifierType modifiers)
| Determines whether a given keyval and modifier mask constitute a valid keyboard accelerator. More...
static void | parse (const Glib::ustring& accelerator, guint& accelerator_key, Gdk::ModifierType& accelerator_mods)
| Parse the accelerator string. More...
static Glib::ustring | name (guint accelerator_key, Gdk::ModifierType accelerator_mods)
| Converts an accelerator keyval and modifier mask into a string parseable by parse(). More...
static Glib::ustring | get_label (guint accelerator_key, Gdk::ModifierType accelerator_mods)
| Converts an accelerator keyval and modifier mask into a string which can be used to represent the accelerator to the user. More...
static void | set_default_mod_mask (Gdk::ModifierType default_mod_mask)
| Sets the modifiers that will be considered significant for keyboard accelerators. More...
static Gdk::ModifierType | get_default_mod_mask ()
| See set_default_mod_mask(). More...

## Protected Member Functions
| AccelGroup ()

## Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gtk::AccelGroup > | wrap (GtkAccelGroup* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Detailed Description

A Gtk::AccelGroup represents a group of keyboard accelerators, typically attached to a toplevel Gtk::Window (with Gtk::Window::add_accel_group()).

Usually you won't need to create a Gtk::AccelGroup directly; instead, gtkmm automatically sets up the accelerators for your menus. Note that accelerators are different from mnemonics. Accelerators are shortcuts for activating a menu item; they appear alongside the menu item for which they're a shortcut. 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 the Gtk::Label constructor. Menu items can have both accelerators and mnemonics, of course.

You can use Gtk::Window::get_accel_group() to get an accel group for that window, then use it with other widgets too.

## Constructor & Destructor Documentation

virtual Gtk::AccelGroup::~AccelGroup | ( |  | ) |
| virtual

Gtk::AccelGroup::AccelGroup | ( |  | ) |
| protected

## Member Function Documentation

bool Gtk::AccelGroup::activate | ( | GQuark | accel_quark,
|  | const Glib::RefPtr< Glib::Object > & | acceleratable,
|  | guint | accel_key,
|  | Gdk::ModifierType | accel_mods
| ) |  |

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

Parameters

  accel_quark | The quark for the accelerator name.
  acceleratable | The Object, usually a Gtk::Window, 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.

static Glib::RefPtr<AccelGroup> Gtk::AccelGroup::create | ( |  | ) |
| static

Creates a new Gtk::AccelGroup object.

Returns
  A Glib::RefPtr<> to a newly created Gtk::AccelGroup object.

bool Gtk::AccelGroup::disconnect_key | ( | guint | accel_key,
|  | Gdk::ModifierType | accel_mods
| ) |  |

Removes an accelerator previously installed through connect().

Parameters

  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.

static Gdk::ModifierType Gtk::AccelGroup::get_default_mod_mask | ( |  | ) |
| static

See set_default_mod_mask().

bool Gtk::AccelGroup::get_is_locked | ( |  | ) | const

Locks are added and removed using lock() and unlock().

Since gtkmm 2.14:

Returns
  `true` if there are 1 or more locks on the accel_group, `false` otherwise.

static Glib::ustring Gtk::AccelGroup::get_label | ( | guint | accelerator_key,
|  | Gdk::ModifierType | accelerator_mods
| ) |  |
| static

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

Since gtkmm 2.6:

Parameters

  accelerator_key | Accelerator keyval.
  accelerator_mods | Accelerator modifier mask.

Returns
  A newly-allocated string representing the accelerator.

Gdk::ModifierType Gtk::AccelGroup::get_modifier_mask | ( |  | ) | const

Gets a Gdk::ModifierType representing the mask for this accel_group.

For example, Gdk::CONTROL_MASK, Gdk::SHIFT_MASK, etc.

Since gtkmm 2.14:

Returns
  The modifier mask for this accel group.

static GType Gtk::AccelGroup::get_type | ( |  | ) |
| static

Get the GType for this class, for use with the underlying GObject type system.

GtkAccelGroup* Gtk::AccelGroup::gobj | ( |  | ) |
| inline

Provides access to the underlying C GObject.

const GtkAccelGroup* Gtk::AccelGroup::gobj | ( |  | ) | const
| inline

Provides access to the underlying C GObject.

GtkAccelGroup* Gtk::AccelGroup::gobj_copy | ( |  | ) |

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

void Gtk::AccelGroup::lock | ( |  | ) |

Locks the given accelerator group.

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

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

static Glib::ustring Gtk::AccelGroup::name | ( | guint | accelerator_key,
|  | Gdk::ModifierType | accelerator_mods
| ) |  |
| static

Converts an accelerator keyval and modifier mask into a string parseable by parse().

For example, if you pass in 'q' and Gdk::CONTROL_MASK, it returns "& lt;Control& gt;q".

static void Gtk::AccelGroup::parse | ( | const Glib::ustring & | accelerator,
|  | guint & | accelerator_key,
|  | Gdk::ModifierType& | accelerator_mods
| ) |  |
| static

Parse the accelerator string.

Parameters

  accelerator | See the Gtk::AccelKey constructor for the format.
  accelerator_key | Output argument
  accelerator_mods | Output argument

Glib::PropertyProxy_ReadOnly< bool > Gtk::AccelGroup::property_is_locked | ( |  | ) | const

Is the accel group locked.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

Glib::PropertyProxy_ReadOnly< Gdk::ModifierType > Gtk::AccelGroup::property_modifier_mask | ( |  | ) | const

Modifier Mask.

You rarely need to use properties because there are get_ and set_ methods for almost all of them.

Returns
  A PropertyProxy_ReadOnly that allows you to get the value of the property, or receive notification when the value of the property changes.

static void Gtk::AccelGroup::set_default_mod_mask | ( | Gdk::ModifierType | default_mod_mask | ) |
| static

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, that is, Control, Shift, and Alt. Other modifiers will ignored by default. You must include at least the three default modifiers in any value you pass to this function.

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

Glib::SignalProxy3< bool,const Glib::RefPtr<Glib::Object>&,guint,Gdk::ModifierType > Gtk::AccelGroup::signal_accel_activate | ( |  | ) |

Slot Prototype:
  `bool on_my_accel_activate(const Glib::RefPtr<Glib::Object>& acceleratable, guint keyval, Gdk::ModifierType modifier)`

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

Parameters

  acceleratable | The object on which the accelerator was activated.
  keyval | The accelerator keyval.
  modifier | The modifier combination of the accelerator.

Returns
  `true` if the accelerator was activated.

Glib::SignalProxy3< void,guint,Gdk::ModifierType,GClosure* > Gtk::AccelGroup::signal_accel_changed | ( |  | ) |

Slot Prototype:
  `void on_my_accel_changed(guint keyval, Gdk::ModifierType modifier, GClosure* accel_closure)`

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

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

Parameters

  keyval | The accelerator keyval.
  modifier | The modifier combination of the accelerator.
  accel_closure | The Closure of the accelerator.

void Gtk::AccelGroup::unlock | ( |  | ) |

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

static bool Gtk::AccelGroup::valid | ( | guint | keyval,
|  | Gdk::ModifierType | modifiers
| ) |  |
| static

Determines whether a given keyval and modifier mask constitute a valid keyboard accelerator.

For example, the '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.

## Friends And Related Function Documentation

Glib::RefPtr< Gtk::AccelGroup > wrap | ( | GtkAccelGroup * | object,
|  | bool | take_copy = `false`
| ) |  |
| related

A Glib::wrap() method for this object.

Parameters

  object | The C instance.
  take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns
  A C++ instance that wraps this C instance.