Gio::SimpleAction Class Reference

SimpleAction - A simple Action implementation. More...

`#include <giomm/simpleaction.h>`

Inheritance diagram for Gio::SimpleAction:
[legend]

## Public Member Functions

| SimpleAction (SimpleAction&& src) noexcept
SimpleAction& | operator= (SimpleAction&& src) noexcept
| ~SimpleAction () noexcept override
GSimpleAction* | gobj ()
| Provides access to the underlying C GObject. More...
const GSimpleAction* | gobj () const
| Provides access to the underlying C GObject. More...
GSimpleAction* | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
void | set_enabled (bool enabled=true)
| Sets the action as enabled or not. More...
void | set_state (const Glib::VariantBase& value)
| Sets the state of the action. More...
void | set_state_hint (const Glib::VariantBase& state_hint)
| Sets the state hint for the action. More...
Glib::PropertyProxy< bool > | property_enabled ()
| If action is currently enabled. More...
Glib::PropertyProxy_ReadOnly< bool > | property_enabled () const
| If action is currently enabled. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_name () const
| The name of the action. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantType > | property_parameter_type () const
| The type of the parameter that must be given when activating the action. More...
Glib::PropertyProxy< Glib::VariantBase > | property_state ()
| The state of the action, or `nullptr` if the action is stateless. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantBase > | property_state () const
| The state of the action, or `nullptr` if the action is stateless. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantType > | property_state_type () const
| The VariantType of the state that the action has, or `nullptr` if the action is stateless. More...
Glib::SignalProxy< void, const Glib::VariantBase& > | signal_activate ()
Glib::SignalProxy< void, const Glib::VariantBase& > | signal_change_state ()
Public Member Functions inherited from Glib::Object
| Object (const Object&)=delete
Object& | operator= (const Object&)=delete
| Object (Object&& src) noexcept
Object& | operator= (Object&& src) noexcept
void* | get_data (const QueryQuark& key)
void | set_data (const Quark& key, void* data)
void | set_data (const Quark& key, void* data, DestroyNotify notify)
void | remove_data (const QueryQuark& quark)
void* | steal_data (const QueryQuark& quark)
Public Member Functions inherited from Glib::ObjectBase
| ObjectBase (const ObjectBase&)=delete
ObjectBase& | operator= (const ObjectBase&)=delete
void | set_property_value (const Glib::ustring& property_name, const Glib::ValueBase& value)
| You probably want to use a specific property_*() accessor method instead. More...
void | get_property_value (const Glib::ustring& property_name, Glib::ValueBase& value) const
| You probably want to use a specific property_*() accessor method instead. More...
template<class PropertyType >
void | set_property (const Glib::ustring& property_name, const PropertyType& value)
| You probably want to use a specific property_*() accessor method instead. More...
template<class PropertyType >
void | get_property (const Glib::ustring& property_name, PropertyType& value) const
| You probably want to use a specific property_*() accessor method instead. More...
void | connect_property_changed (const Glib::ustring& property_name, const sigc::slot< void >& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
void | connect_property_changed (const Glib::ustring& property_name, sigc::slot< void >&& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
sigc::connection | connect_property_changed_with_return (const Glib::ustring& property_name, const sigc::slot< void >& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
sigc::connection | connect_property_changed_with_return (const Glib::ustring& property_name, sigc::slot< void >&& slot)
| You can use the signal_changed() signal of the property proxy instead. More...
void | freeze_notify ()
| Increases the freeze count on object. More...
void | thaw_notify ()
| Reverts the effect of a previous call to freeze_notify(). More...
virtual void | reference () const
| Increment the reference count for this object. More...
virtual void | unreference () const
| Decrement the reference count for this object. More...
GObject* | gobj ()
| Provides access to the underlying C GObject. More...
const GObject* | gobj () const
| Provides access to the underlying C GObject. More...
GObject* | gobj_copy () const
| Give a ref-ed copy to someone. Use for direct struct access. More...
Public Member Functions inherited from sigc::trackable
| trackable () noexcept
| trackable (const trackable &src) noexcept
| trackable (trackable &&src)
| ~trackable ()
void | add_destroy_notify_callback (void *data, func_destroy_notify func) const
void | notify_callbacks ()
trackable & | operator= (const trackable &src)
trackable & | operator= (trackable &&src)
void | remove_destroy_notify_callback (void *data) const
Public Member Functions inherited from Gio::Action
| Action (Action&& src) noexcept
Action& | operator= (Action&& src) noexcept
| ~Action () noexcept override
GAction* | gobj ()
| Provides access to the underlying C GObject. More...
const GAction* | gobj () const
| Provides access to the underlying C GObject. More...
Glib::ustring | get_name () const
| Queries the name of action. More...
Glib::VariantType | get_parameter_type () const
| Queries the type of the parameter that must be given when activating action. More...
Glib::VariantType | get_state_type () const
| Queries the type of the state of action. More...
template<typename T_Value >
void | get_state_hint (T_Value& value) const
| Requests a hint about the valid range of values for the state of the action. More...
Glib::VariantBase | get_state_hint_variant () const
| Requests a hint about the valid range of values for the state of action. More...
bool | get_enabled () const
| Checks if action is currently enabled. More...
template<typename T_Value >
void | change_state (const T_Value& value)
| Request for the state of action to be changed to value, assuming that the action has the expected state type. More...
template<typename T_Value >
void | change_state (const Glib::Variant< T_Value >& value)
void | change_state_variant (const Glib::VariantBase& value)
| Request for the state of action to be changed to value. More...
void | change_state (const Glib::VariantBase& value)
| Request for the state of action to be changed to value. More...
template<typename T_Value >
void | get_state (T_Value& value) const
| Queries the current state of the action. More...
Glib::VariantBase | get_state_variant () const
| Queries the current state of action. More...
void | activate ()
| Activates the action. More...
template<typename T_Value >
void | activate (const T_Value& parameter)
| Activates the action. More...
template<typename T_Value >
void | activate (const Glib::Variant< T_Value >& parameter)
void | activate_variant (const Glib::VariantBase& parameter)
| Activates the action. More...
void | activate (const Glib::VariantBase& parameter)
| Activates the action. More...
template<typename T_Value >
Glib::ustring | print_detailed_name (const T_Value& target_value)
| Formats a detailed action name from the action's action_name and target_value. More...
Glib::PropertyProxy_ReadOnly< bool > | property_enabled () const
| If action is currently enabled. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring > | property_name () const
| The name of the action. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantType > | property_parameter_type () const
| The type of the parameter that must be given when activating the action. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantBase > | property_state () const
| The state of the action, or `nullptr` if the action is stateless. More...
Glib::PropertyProxy_ReadOnly< Glib::VariantType > | property_state_type () const
| The VariantType of the state that the action has, or `nullptr` if the action is stateless. More...
virtual Glib::ustring | get_name_vfunc () const
virtual Glib::VariantType | get_parameter_type_vfunc () const
virtual Glib::VariantType | get_state_type_vfunc () const
virtual Glib::VariantBase | get_state_hint_vfunc () const
virtual bool | get_enabled_vfunc () const
virtual Glib::VariantBase | get_state_vfunc () const
virtual void | change_state_vfunc (const Glib::VariantBase& value)
virtual void | activate_vfunc (const Glib::VariantBase& parameter)
Public Member Functions inherited from Glib::Interface
| Interface ()
| A Default constructor. More...
| Interface (Interface&& src) noexcept
Interface& | operator= (Interface&& src) noexcept
| Interface (const Glib::Interface_Class& interface_class)
| Called by constructors of derived classes. More...
| Interface (GObject* castitem)
| Called by constructors of derived classes. More...
| ~Interface () noexcept override
| Interface (const Interface&)=delete
Interface& | operator= (const Interface&)=delete
GObject* | gobj ()
const GObject* | gobj () const

## 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< SimpleAction > | create (const Glib::ustring& name)
static Glib::RefPtr< SimpleAction > | create (const Glib::ustring& name, const Glib::VariantType& parameter_type)
| Creates a new action. More...
static Glib::RefPtr< SimpleAction > | create (const Glib::ustring& name, const Glib::VariantType& parameter_type, const Glib::VariantBase& state)
| Creates a new stateful action. More...
static Glib::RefPtr< SimpleAction > | create (const Glib::ustring& name, const Glib::VariantBase& state)
| Creates a new stateful action. More...
static Glib::RefPtr< SimpleAction > | create_bool (const Glib::ustring& name, bool state=false)
| Creates a new boolean stateful action. More...
static Glib::RefPtr< SimpleAction > | create_radio_string (const Glib::ustring& name, const Glib::ustring& initial_state)
| Creates a new radio action with a string-based target value. More...
static Glib::RefPtr< SimpleAction > | create_radio_integer (const Glib::ustring& name, gint32 initial_state)
| Creates a new radio action with an integer-based target value. More...
Static Public Member Functions inherited from Gio::Action
static void | add_interface (GType gtype_implementer)
static GType | get_type ()
| Get the GType for this class, for use with the underlying GObject type system. More...
static bool | name_is_valid (const Glib::ustring& action_name)
| Checks if action_name is valid. More...
template<typename T_Value >
static void | parse_detailed_name (const Glib::ustring& detailed_name, Glib::ustring& action_name, T_Value& target_value)
| Parses a detailed action name into its separate name and target components. More...
static void | parse_detailed_name_variant (const Glib::ustring& detailed_name, Glib::ustring& action_name, Glib::VariantBase& target_value)
| Parses a detailed action name into its separate name and target components. More...
static Glib::ustring | print_detailed_name_variant (const Glib::ustring& action_name, const Glib::VariantBase& target_value)
| Formats a detailed action name from action_name and target_value. More...

## Protected Member Functions

| SimpleAction (const Glib::ustring& name)
| Creates a new action. More...
| SimpleAction (const Glib::ustring& name, const Glib::VariantBase& state)
| Creates a new stateful action. More...
| SimpleAction (const Glib::ustring& name, const Glib::VariantType& parameter_type)
| SimpleAction (const Glib::ustring& name, const Glib::VariantType& parameter_type, const Glib::VariantBase& state)
Protected Member Functions inherited from Glib::Object
| Object ()
| Object (const Glib::ConstructParams& construct_params)
| Object (GObject* castitem)
| ~Object () noexcept override
Protected Member Functions inherited from Glib::ObjectBase
| ObjectBase ()
| This default constructor is called implicitly from the constructor of user-derived classes, even if, for instance, Gtk::Button calls a different ObjectBase constructor. More...
| ObjectBase (const char* custom_type_name)
| A derived constructor always overrides this choice. More...
| ObjectBase (const std::type_info& custom_type_info)
| This constructor is a special feature to allow creation of derived types on the fly, without having to use g_object_new() manually. More...
| ObjectBase (ObjectBase&& src) noexcept
ObjectBase& | operator= (ObjectBase&& src) noexcept
virtual | ~ObjectBase () noexcept=0
void | initialize (GObject* castitem)
void | initialize_move (GObject* castitem, Glib::ObjectBase* previous_wrapper)
Protected Member Functions inherited from Gio::Action
| Action ()
| You should derive from this class to use it. More...

## Related Functions

(Note that these are not member functions.)
Glib::RefPtr< Gio::SimpleAction > | wrap (GSimpleAction* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...
Related Functions inherited from Glib::Object
Glib::RefPtr< Glib::Object > | wrap (GObject* object, bool take_copy=false)
Related Functions inherited from Gio::Action
Glib::RefPtr< Gio::Action > | wrap (GAction* object, bool take_copy=false)
| A Glib::wrap() method for this object. More...

## Additional Inherited Members

Public Types inherited from Glib::Object
using | DestroyNotify = void(*)(gpointer data)
Public Types inherited from sigc::trackable
typedef internal::func_destroy_notify | func_destroy_notify

## Detailed Description

SimpleAction - A simple Action implementation.

A SimpleAction is the obvious simple implementation of the Action interface. This is the easiest way to create an action for purposes of adding it to a SimpleActionGroup.

See also Gtk::Action.

Since glibmm 2.32:

## Constructor & Destructor Documentation

Gio::SimpleAction::SimpleAction | ( | SimpleAction&& | src | ) |

noexcept

Gio::SimpleAction::~SimpleAction | ( |  | ) |

override noexcept

Gio::SimpleAction::SimpleAction | ( | const Glib::ustring& | name | ) |

explicit protected

Creates a new action.

The created action is stateless.

Parameters

  name | The name of the action.

Gio::SimpleAction::SimpleAction | ( | const Glib::ustring& | name,
|  | const Glib::VariantBase& | state
| ) |  |

protected

Creates a new stateful action.

state is the initial state of the action. All future state values must have the same VariantType as the initial state.

Parameters

  name | The name of the action.
  state | The initial state of the action.

Gio::SimpleAction::SimpleAction | ( | const Glib::ustring& | name,
|  | const Glib::VariantType& | parameter_type
| ) |  |

explicit protected

Gio::SimpleAction::SimpleAction | ( | const Glib::ustring& | name,
|  | const Glib::VariantType& | parameter_type,
|  | const Glib::VariantBase& | state
| ) |  |

explicit protected

## Member Function Documentation

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create | ( | const Glib::ustring& | name | ) |

static

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create | ( | const Glib::ustring& | name,
|  | const Glib::VariantType& | parameter_type
| ) |  |

static

Creates a new action.

The created action is stateless. See g_simple_action_new_stateful() to create an action that has state.

Since glibmm 2.28:

Parameters

  name | The name of the action.
  parameter_type | The type of parameter that will be passed to handlers for the SimpleAction::signal_activate() signal, or `nullptr` for no parameter.

Returns
  A new SimpleAction.

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create | ( | const Glib::ustring& | name,
|  | const Glib::VariantType& | parameter_type,
|  | const Glib::VariantBase& | state
| ) |  |

static

Creates a new stateful action.

All future state values must have the same VariantType as the initial state.

If the state Variant is floating, it is consumed.

Since glibmm 2.28:

Parameters

  name | The name of the action.
  parameter_type | The type of the parameter that will be passed to handlers for the SimpleAction::signal_activate() signal, or `nullptr` for no parameter.
  state | The initial state of the action.

Returns
  A new SimpleAction.

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create | ( | const Glib::ustring& | name,
|  | const Glib::VariantBase& | state
| ) |  |

static

Creates a new stateful action.

state is the initial state of the action. All future state values must have the same VariantType as the initial state.

Since glibmm 2.38:

Parameters

  name | The name of the action.
  state | The initial state of the action.

Returns
  A new SimpleAction.

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create_bool | ( | const Glib::ustring& | name,
|  | bool | state = `false`
| ) |  |

static

Creates a new boolean stateful action.

state is the initial state of the action. All future state values must also be bool.

Since glibmm 2.38:

Parameters

  name | The name of the action.
  state | The initial state of the action.

Returns
  A new SimpleAction.

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create_radio_integer | ( | const Glib::ustring& | name,
|  | gint32 | initial_state
| ) |  |

static

Creates a new radio action with an integer-based target value.

Since glibmm 2.38:

Parameters

  name | The name of the action.
  initial_state | The initial state of the action.

Returns
  A new SimpleAction.

static Glib::RefPtr<SimpleAction> Gio::SimpleAction::create_radio_string | ( | const Glib::ustring& | name,
|  | const Glib::ustring& | initial_state
| ) |  |

static

Creates a new radio action with a string-based target value.

Since glibmm 2.38:

Parameters

  name | The name of the action.
  initial_state | The initial state of the action.

Returns
  A new SimpleAction.

static GType Gio::SimpleAction::get_type | ( |  | ) |

static

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

GSimpleAction* Gio::SimpleAction::gobj | ( |  | ) |

inline

Provides access to the underlying C GObject.

const GSimpleAction* Gio::SimpleAction::gobj | ( |  | ) | const

inline

Provides access to the underlying C GObject.

GSimpleAction* Gio::SimpleAction::gobj_copy | ( |  | ) |

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

SimpleAction& Gio::SimpleAction::operator= | ( | SimpleAction&& | src | ) |

noexcept

Glib::PropertyProxy< bool > Gio::SimpleAction::property_enabled | ( |  | ) |

If action is currently enabled.

If the action is disabled then calls to g_action_activate() and g_action_change_state() have no effect.

Since glibmm 2.28:

Default value: `true`

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

Glib::PropertyProxy_ReadOnly< bool > Gio::SimpleAction::property_enabled | ( |  | ) | const

If action is currently enabled.

If the action is disabled then calls to g_action_activate() and g_action_change_state() have no effect.

Since glibmm 2.28:

Default value: `true`

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< Glib::ustring > Gio::SimpleAction::property_name | ( |  | ) | const

The name of the action.

This is mostly meaningful for identifying the action once it has been added to a SimpleActionGroup.

Since glibmm 2.28:

Default value: ""

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< Glib::VariantType > Gio::SimpleAction::property_parameter_type | ( |  | ) | const

The type of the parameter that must be given when activating the action.

Since glibmm 2.28:

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< Glib::VariantBase > Gio::SimpleAction::property_state | ( |  | ) |

The state of the action, or `nullptr` if the action is stateless.

Since glibmm 2.28:

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

Glib::PropertyProxy_ReadOnly< Glib::VariantBase > Gio::SimpleAction::property_state | ( |  | ) | const

The state of the action, or `nullptr` if the action is stateless.

Since glibmm 2.28:

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< Glib::VariantType > Gio::SimpleAction::property_state_type | ( |  | ) | const

The VariantType of the state that the action has, or `nullptr` if the action is stateless.

Since glibmm 2.28:

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

void Gio::SimpleAction::set_enabled | ( | bool | enabled = `true` | ) |

Sets the action as enabled or not.

An action must be enabled in order to be activated or in order to have its state changed from outside callers.

This should only be called by the implementor of the action. Users of the action should not attempt to modify its enabled flag.

Since glibmm 2.28:

Parameters

  enabled | Whether the action is enabled.

void Gio::SimpleAction::set_state | ( | const Glib::VariantBase& | value | ) |

Sets the state of the action.

This directly updates the 'state' property to the given value.

This should only be called by the implementor of the action. Users of the action should not attempt to directly modify the 'state' property. Instead, they should call g_action_change_state() to request the change.

If the value GVariant is floating, it is consumed.

Since glibmm 2.30:

Parameters

  value | The new Variant for the state.

void Gio::SimpleAction::set_state_hint | ( | const Glib::VariantBase& | state_hint | ) |

Sets the state hint for the action.

See g_action_get_state_hint() for more information about action state hints.

Since glibmm 2.44:

Parameters

  state_hint | A Variant representing the state hint.

Glib::SignalProxy< void,const Glib::VariantBase& > Gio::SimpleAction::signal_activate | ( |  | ) |

Slot Prototype:
  `void on_my_activate(const Glib::VariantBase& parameter)`

Flags: Run Last, Must Collect

Indicates that the action was just activated.

parameter will always be of the expected type, i.e. the parameter type specified when the action was created. If an incorrect type is given when activating the action, this signal is not emitted.

Since GLib 2.40, if no handler is connected to this signal then the default behaviour for boolean-stated actions with a `nullptr` parameter type is to toggle them via the SimpleAction::signal_change_state() signal. For stateful actions where the state type is equal to the parameter type, the default is to forward them directly to SimpleAction::signal_change_state(). This should allow almost all users of SimpleAction to connect only one handler or the other.

Since glibmm 2.28:

Parameters

  parameter | The parameter to the activation, or `nullptr` if it has no parameter.

Glib::SignalProxy< void,const Glib::VariantBase& > Gio::SimpleAction::signal_change_state | ( |  | ) |

Slot Prototype:
  `void on_my_change_state(const Glib::VariantBase& value)`

Flags: Run Last, Must Collect

Indicates that the action just received a request to change its state.

value will always be of the correct state type, i.e. the type of the initial state passed to g_simple_action_new_stateful(). If an incorrect type is given when requesting to change the state, this signal is not emitted.

If no handler is connected to this signal then the default behaviour is to call g_simple_action_set_state() to set the state to the requested value. If you connect a signal handler then no default action is taken. If the state should change then you must call g_simple_action_set_state() from the handler.

An example of a 'change-state' handler:

[C example ellipted]

The handler need not set the state to the requested value. It could set it to any value at all, or take some other action.

Since glibmm 2.30:

Parameters

  value | The requested value for the state.

## Friends And Related Function Documentation

Glib::RefPtr< Gio::SimpleAction > wrap | ( | GSimpleAction * | 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.