Interfacing Raku to Gnome GTK+

Gnome::Gtk3::AccelGroup

Groups of global keyboard accelerators for an entire Gnome::Gtk3::Window.

Description

A Gnome::Gtk3::AccelGroup represents a group of keyboard accelerators, typically attached to a toplevel Gnome::Gtk3::Window (with Gnome::Gtk3::Window.add-accel-group()). Usually you won’t need to create a Gnome::Gtk3::AccelGroup directly; instead you might whish to use Gnome::Gtk3::Builder together with Gnome::Gio::Action and modules using the Gnome::Gtk3::Actionable role.

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 Gnome::Gtk3::Label.new(:mnemonic). Menu items can have both accelerators and mnemonics, of course.

See Also

Gnome::Gtk3::Window.add-accel-group(), Gnome::Gtk3::AccelMap.change-entry(),

Synopsis

Declaration

unit class Gnome::Gtk3::AccelGroup;
also is Gnome::GObject::Object;

Uml Diagram

Types

enum GtkAccelFlags

Accelerator flags used with connect().

  • GTK-ACCEL-VISIBLE: Accelerator is visible

  • GTK-ACCEL-LOCKED: Accelerator not removable

  • GTK-ACCEL-MASK: Mask

class N-GtkAccelKey

  • UInt $.accel-key: The accelerator keyval

  • UInt $.accel-mods:The accelerator modifiers mask from GdkModifierType to be found in Gnome::Gdk3::Types.

  • UInt $.accel-flags: The accelerator flags

Methods

new

default, no options

Create a new AccelGroup object.

multi method new ( )

:native-object

Create an AccelGroup object using a native object from elsewhere. See also Gnome::N::TopLevelClassSupport.

multi method new ( N-GObject :$native-object! )

:build-id

Create a AccelGroup object using a native object returned from a builder. See also Gnome::GObject::Object.

multi method new ( Str :$build-id! )

activate

Finds the first accelerator in the accel-group that matches $accel-key and $accel-mods, and activates it.

Returns: True if an accelerator was activated and handled this keypress.

Note: It seems that it always returns False altough the callback is called and finishes without errors.

method activate (
  UInt $accel-quark, N-GObject() $acceleratable,
  UInt $accel-key, UInt $accel-mods
  --> Bool
)

  • $accel-quark; the quark for the accelerator name

  • $acceleratable; the Gnome::Gtk3::Object, usually a Gnome::Gtk3::Window, on which to activate the accelerator

  • $accel-key; accelerator keyval from a key event

  • $accel-mods; keyboard state mask from a key event. A mask from GdkModifierType to be found in Gnome::Gdk3::Types.

The $accel-quark can be retrieved as follows where the key sequence of the accelerator is <ctrl>A .

my Gnome::Glib::Quark $quark .= new;
my Str $accel-name = $ag.accelerator-name( GDK_KEY_A, GDK_CONTROL_MASK);
my UInt $accel-quark = $quark.from-string($accel-name);

connect

Installs an accelerator in this group. When accel-group is being activated in response to a call to groups-activate(), the closure will be invoked if the accel-key and accel-mods from groups-activate() match those of this connection.

The signature used for the closure is that of Gnome::Gtk3::AccelGroupActivate.

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

method connect (
  UInt $accel-key, UInt $accel-mods,
  UInt $accel_flags, N-GObject() $closure
)

  • $accel-key; key value of the accelerator

  • $accel-mods; modifier combination of the accelerator. A mask from GdkModifierType to be found in Gnome::Gdk3::Types.

  • $accel_flags; a flag mask to configure this accelerator. A mask from bits of GtkAccelFlags

  • $closure; closure to be executed upon accelerator activation

connect-by-path

Installs an accelerator in this group, using an accelerator path to look up the appropriate key and modifiers (see Gnome::Gtk3::AccelMap.add-entry()).

When the accel-group is being activated in response to a call to groups-activate(), closure will be invoked if the $accel-key and $accel-mods from groups-activate() match the key and modifiers for the path.

The signature used for the closure is that of Gnome::Gtk3::AccelGroupActivate.

Note that accel-path string will be stored in a Gnome::Gtk3::Quark. Therefore, if you pass a static string, you can save some memory by interning it first with g-intern-static-string().

method connect-by-path ( Str $accel_path, N-GObject() $closure )

  • $accel_path; path used for determining key and modifiers

  • $closure; closure to be executed upon accelerator activation

disconnect

Removes an accelerator previously installed through connect().

Returns: True if the closure was found and got disconnected

method disconnect ( N-GObject() $closure --> Bool )
  • $closure; the closure to remove from this accelerator group, or undefined to remove all closures

disconnect-key

Removes an accelerator previously installed through connect().

Returns: True if there was an accelerator which could be removed, False otherwise.

method disconnect-key ( UInt $accel-key, UInt $accel-mods --> Bool )

  • $accel-key; key value of the accelerator

  • $accel-mods; modifier combination of the accelerator. A mask from GdkModifierType to be found in Gnome::Gdk3::Types.

from-accel-closure

Finds the Gnome::Gtk3::AccelGroup to which closure is connected; see connect().

Returns: the Gnome::Gtk3::AccelGroup to which closure is connected, or undefined

method from-accel-closure ( N-GObject() $closure --> N-GObject )
  • $closure; a Gnome::Gtk3::Closure

get-is-locked

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

Returns: True if there are 1 or more locks on the accel-group, False otherwise.

method get-is-locked ( --> Bool )

get-modifier-mask

Gets a mask with bits from enum GdkModifierType found in Gnome::Gdk3::Types representing the mask for this accel-group. For example, modifiers like GDK-CONTROL-MASK, GDK-SHIFT-MASK, etc.

Returns: the modifier mask for this accel group.

method get-modifier-mask ( --> UInt )

groups-activate

Finds the first accelerator in any Gnome::Gtk3::AccelGroup attached to $object that matches $accel-key and $accel-mods, and activates that accelerator.

Returns: True if an accelerator was activated and handled this keypress

method groups-activate (
  N-GObject() $object, UInt $accel-key, UInt $accel-mods
  --> Bool
)

  • $object; the widget, usually a Gnome::Gtk3::Window, on which to activate the accelerator.

  • $accel-key; accelerator keyval from a key event.

  • $accel-mods; keyboard state mask from a key event. A mask from GdkModifierType to be found in Gnome::Gdk3::Types.

accelerator-get-default-mod-mask

Gets the modifier mask.

The modifier mask determines which modifiers are considered significant for keyboard accelerators. See gtk-accelerator-set-default-mod-mask().

Returns: the default accelerator modifier mask. A mask of GdkModifierType to be found in Gnome::Gdk3::Types.

method accelerator-get-default-mod-mask ( --> UInt )

accelerator-get-label

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

Returns: a newly-allocated string representing the accelerator.

method accelerator-get-label (
  UInt $accelerator-key, UInt $accelerator-mods --> Str
)

  • $accelerator-key; accelerator keyval

  • $accelerator-mods; accelerator modifier mask from GdkModifierType to be found in Gnome::Gdk3::Types.

accelerator-name

Converts an accelerator keyval and modifier mask into a string parseable by gtk-accelerator-parse(). For example, if you pass in Gnome::Gtk3::DK-KEY-q and Gnome::Gtk3::DK-CONTROL-MASK, this function returns “q”.

If you need to display accelerators in the user interface, see gtk-accelerator-get-label().

Returns: a newly-allocated accelerator name

method accelerator-name (
  UInt $accelerator-key, UInt $accelerator-mods --> Str
)

  • $accelerator-key; accelerator keyval

  • $accelerator-mods; accelerator modifier mask from GdkModifierType to be found in Gnome::Gdk3::Types.

accelerator-parse

Parses a string representing an accelerator. The format looks like “a” or “F1” or “z” (the last one is for key release).

The parser is fairly liberal and allows lower or upper case, and also abbreviations such as “” and “”. 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 “minus” instead of “-”.

If the parse fails, accelerator-key and accelerator-mods will be set to 0 (zero).

method accelerator-parse ( Str $accelerator --> List )
  • $accelerator; string representing an accelerator

The returned List contains;

  • $accelerator-key; the accelerator keyval, or undefined

  • $accelerator-mods; the accelerator modifier mask from GdkModifierType to be found in Gnome::Gdk3::Types. undefined

Note that many letters are translated to lowercase. So, for example, the string ‘A' will not produce `GDK_KEY_A` but `GDK_KEY_a` for the returned `$accelerator-key`. The resulting behaviour however, will be the same.

accelerator-set-default-mod-mask

Sets the modifiers that will be considered significant for keyboard accelerators. The default mod mask depends on the GDK backend in use, but will typically include Gnome::Gtk3::DK-CONTROL-MASK Gnome::Gtk3::DK-SHIFT-MASK Gnome::Gtk3::DK-MOD1-MASK Gnome::Gtk3::DK-SUPER-MASK Gnome::Gtk3::DK-HYPER-MASK Gnome::Gtk3::DK-META-MASK. In other words, Control, Shift, Alt, Super, Hyper and Meta. Other modifiers will by default be ignored by Gnome::Gtk3::AccelGroup.

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.

method accelerator-set-default-mod-mask ( UInt $default_mod_mask )
  • $default_mod_mask; accelerator modifier mask from GdkModifierType to be found in Gnome::Gdk3::Types.

lock

Locks the given accelerator group.

Locking an acelerator group prevents the accelerators contained within it to be changed during runtime. Refer to Gnome::Gtk3::Map.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.

method lock ( )

unlock

Undoes the last call to lock() on this accel-group.

method unlock ( )

Signals

accel-activate

The accel-activate signal is an implementation detail of Gnome::Gtk3::AccelGroup and not meant to be used by applications.

Returns: True if the accelerator was activated

method handler (
  N-GObject $acceleratable,
  UInt $keyval,
  UInt #`{ GdkModifierType flags from Gnome::Gdk3::Window } $modifier,
  Gnome::Gtk3::AccelGroup :_widget($accel_group),
  Int :$_handler_id,
  N-GObject :$_native-object,
  *%user-options

  --> Bool
);

  • $acceleratable; the object on which the accelerator was activated

  • $keyval; the accelerator keyval

  • $modifier; the modifier combination of the accelerator

  • $accel_group; The instance which registered the signal

  • $_handler-id; The handler id which is returned from the registration

  • $_native-object; The native object provided by the caller wrapped in the Raku object.

  • %user-options; A list of named arguments provided at the register-signal() method

accel-changed

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

Widgets like Gnome::Gtk3::AccelLabel which display an associated accelerator should connect to this signal, and rebuild their visual representation if the accel-closure is theirs.

method handler (
  UInt $keyval,
  UInt #`{ GdkModifierType flags from Gnome::Gdk3::Window } $modifier,
  N-GObject #`{ native Gnome::GObject::Closure } $accel_closure,
  Gnome::Gtk3::AccelGroup :_widget($accel_group),
  Int :$_handle_id,
  *%user-options
);

  • $keyval; the accelerator keyval

  • $modifier; the modifier combination of the accelerator

  • $accel_closure; the Gnome::Gtk3::Closure of the accelerator

  • $accel_group; The instance which registered the signal

  • $_handler-id; The handler id which is returned from the registration

  • $_native-object; The native object provided by the caller wrapped in the Raku object.

  • %user-options; A list of named arguments provided at the register-signal() method