class Gtk::ShortcutController

Overview

Gtk::ShortcutController is an event controller that manages shortcuts.

Most common shortcuts are using this controller implicitly, e.g. by adding a mnemonic underline to a Gtk::Label, or by installing a key binding using Gtk::WidgetClass#add_binding, or by adding accelerators to global actions using Gtk::Application#accels_for_action=.

But it is possible to create your own shortcut controller, and add shortcuts to it.

Gtk::ShortcutController implements GListModel for querying the shortcuts that have been added to it.

Gtk::ShortcutController as a Gtk::Buildable

Gtk::ShortcutControllers can be creates in ui files to set up shortcuts in the same place as the widgets.

An example of a UI definition fragment with Gtk::ShortcutController:

WARNING ⚠️ The following code is in xml ⚠️

  <object class='Gtk::Button'>
    <child>
      <object class='Gtk::ShortcutController'>
        <property name='scope'>managed</property>
        <child>
          <object class='Gtk::Shortcut'>
            <property name='trigger'>&lt;Control&gt;k</property>
            <property name='action'>activate</property>
          </object>
        </child>
      </object>
    </child>
  </object>

This example creates a Gtk::ActivateAction for triggering the activate signal of the Gtk::Button. See Gtk::ShortcutAction#parse_string for the syntax for other kinds of Gtk::ShortcutAction. See Gtk::ShortcutTrigger#parse_string to learn more about the syntax for triggers.

Included Modules

Defined in:

lib/gi-crystal/src/auto/gtk-4.0/shortcut_controller.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from module Gtk::Buildable

buildable_id : String? buildable_id, to_unsafe to_unsafe

Class methods inherited from module Gtk::Buildable

g_type : UInt64 g_type

Instance methods inherited from module Gio::ListModel

item(position : UInt32) : GObject::Object? item, item_type : UInt64 item_type, items_changed(position : UInt32, removed : UInt32, added : UInt32) : Nil items_changed, items_changed_signal items_changed_signal, n_items : UInt32 n_items, to_unsafe to_unsafe

Class methods inherited from module Gio::ListModel

g_type : UInt64 g_type

Instance methods inherited from class Gtk::EventController

current_event : Gdk::Event? current_event, current_event_device : Gdk::Device? current_event_device, current_event_state : Gdk::ModifierType current_event_state, current_event_time : UInt32 current_event_time, name : String? name, name=(value : String) : String
name=(name : String?) : Nil name=, propagation_limit : Gtk::PropagationLimit propagation_limit, propagation_limit=(limit : Gtk::PropagationLimit) : Nil propagation_limit=, propagation_phase : Gtk::PropagationPhase propagation_phase, propagation_phase=(phase : Gtk::PropagationPhase) : Nil propagation_phase=, reset : Nil reset, static_name=(name : String?) : Nil static_name=, widget : Gtk::Widget widget

Constructor methods inherited from class Gtk::EventController

new
new(*, name : String? = nil, propagation_limit : Gtk::PropagationLimit? = nil, propagation_phase : Gtk::PropagationPhase? = nil, widget : Gtk::Widget? = nil) new

Class methods inherited from class Gtk::EventController

g_type : UInt64 g_type

Instance methods inherited from class GObject::Object

bind_property(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags) : GObject::Binding bind_property, bind_property_full(source_property : String, target : GObject::Object, target_property : String, flags : GObject::BindingFlags, transform_to : GObject::Closure, transform_from : GObject::Closure) : GObject::Binding bind_property_full, data(key : String) : Pointer(Void)? data, finalize finalize, freeze_notify : Nil freeze_notify, getv(names : Enumerable(String), values : Enumerable(_)) : Nil getv, notify(property_name : String) : Nil notify, notify_by_pspec(pspec : GObject::ParamSpec) : Nil notify_by_pspec, notify_signal notify_signal, property(property_name : String, value : _) : Nil property, qdata(quark : UInt32) : Pointer(Void)? qdata, ref_count : UInt32 ref_count, run_dispose : Nil run_dispose, set_data(key : String, data : Pointer(Void)?) : Nil set_data, set_property(property_name : String, value : _) : Nil set_property, steal_data(key : String) : Pointer(Void)? steal_data, steal_qdata(quark : UInt32) : Pointer(Void)? steal_qdata, thaw_notify : Nil thaw_notify, to_unsafe : Pointer(Void) to_unsafe, watch_closure(closure : GObject::Closure) : Nil watch_closure

Constructor methods inherited from class GObject::Object

cast(obj : GObject::Object) : self cast, cast?(obj : GObject::Object) : self? cast?, new(pointer : Pointer(Void), transfer : GICrystal::Transfer)
new new, newv(object_type : UInt64, parameters : Enumerable(GObject::Parameter)) : self newv

Class methods inherited from class GObject::Object

compat_control(what : UInt64, data : Pointer(Void)?) : UInt64 compat_control, g_type : UInt64 g_type, interface_find_property(g_iface : GObject::TypeInterface, property_name : String) : GObject::ParamSpec interface_find_property, interface_list_properties(g_iface : GObject::TypeInterface) : Enumerable(GObject::ParamSpec) interface_list_properties

Constructor Detail

def self.new : self #

Creates a new shortcut controller.


def self.new(*, item_type : UInt64? = nil, mnemonic_modifiers : Gdk::ModifierType? = nil, model : Gio::ListModel? = nil, n_items : UInt32? = nil, name : String? = nil, propagation_limit : Gtk::PropagationLimit? = nil, propagation_phase : Gtk::PropagationPhase? = nil, scope : Gtk::ShortcutScope? = nil, widget : Gtk::Widget? = nil) #

def self.new_for_model(model : Gio::ListModel) : self #

Creates a new shortcut controller that takes its shortcuts from the given list model.

A controller created by this function does not let you add or remove individual shortcuts using the shortcut controller api, but you can change the contents of the model.


Class Method Detail

def self.g_type : UInt64 #

Returns the type id (GType) registered in GLib type system.


Instance Method Detail

def add_shortcut(shortcut : Gtk::Shortcut) : Nil #

Adds @shortcut to the list of shortcuts handled by @self.

If this controller uses an external shortcut list, this function does nothing.


def item_type : UInt64 #

def mnemonic_modifiers : Gdk::ModifierType #

def mnemonic_modifiers=(value : Gdk::ModifierType) : Gdk::ModifierType #

def mnemonics_modifiers : Gdk::ModifierType #

Gets the mnemonics modifiers for when this controller activates its shortcuts.


def mnemonics_modifiers=(modifiers : Gdk::ModifierType) : Nil #

Sets the controller to use the given modifier for mnemonics.

The mnemonics modifiers determines which modifiers need to be pressed to allow activation of shortcuts with mnemonics triggers.

GTK normally uses the Alt modifier for mnemonics, except in Gtk::PopoverMenus, where mnemonics can be triggered without any modifiers. It should be very rarely necessary to change this, and doing so is likely to interfere with other shortcuts.

This value is only relevant for local shortcut controllers. Global and managed shortcut controllers will have their shortcuts activated from other places which have their own modifiers for activating mnemonics.


def model=(value : Gio::ListModel?) : Gio::ListModel? #

def n_items : UInt32 #

def remove_shortcut(shortcut : Gtk::Shortcut) : Nil #

Removes @shortcut from the list of shortcuts handled by @self.

If @shortcut had not been added to @controller or this controller uses an external shortcut list, this function does nothing.


def scope : Gtk::ShortcutScope #

Gets the scope for when this controller activates its shortcuts.

See Gtk::ShortcutController#scope= for details.


def scope=(scope : Gtk::ShortcutScope) : Nil #

Sets the controller to have the given @scope.

The scope allows shortcuts to be activated outside of the normal event propagation. In particular, it allows installing global keyboard shortcuts that can be activated even when a widget does not have focus.

With %GTK_SHORTCUT_SCOPE_LOCAL, shortcuts will only be activated when the widget has focus.