aria::binding::ViewModel Class Reference

Base class for view models. More...

#include <view_model.hpp>

Inheritance diagram for aria::binding::ViewModel:

Public Member Functions
	ViewModel ()
virtual	~ViewModel ()
Property< bool > &	is_active ()
	Activation state (Property<bool>).
const Property< bool > &	is_active () const
virtual void	on_activate ()
virtual void	on_deactivate ()
void	activate ()
void	deactivate ()
void	add_child (std::shared_ptr< ViewModel > child)
void	track (Subscription sub)
	Add a subscription that will be released on destruction.
void	add_destroy_hook (std::function< void()> hook)

Protected Member Functions
SubscriptionBag &	bag ()
	Access the subscription bag.

Detailed Description

Base class for view models.

Provides lifecycle, child management, and a subscription bag that auto-cleans up on destruction.

For structured concurrency (auto-cancel of in-flight coroutines on VM destruction), use the ViewModelScope helper from aria/binding/view_model_scope.hpp.

The dtor / activate / deactivate / add_child / add_destroy_hook impls live out-of-line in view_model.cpp so the vtable is emitted exactly once inside the binding library (matters on Windows DLL builds, reduces code size, and speeds compilation of every TU that only uses the interface).

MSVC C4251: enable_shared_from_this<ViewModel> contains a weak_ptr whose layout is guaranteed by the C++ Standard Library ABI. All other STL members have been moved into the Impl. Suppression is safe.

Constructor & Destructor Documentation

ViewModel()

aria::binding::ViewModel::ViewModel

(

)

~ViewModel()

virtual aria::binding::ViewModel::~ViewModel ( )

virtual

Member Function Documentation

is_active() [1/2]

Property< bool > & aria::binding::ViewModel::is_active ( )

nodiscard

Activation state (Property<bool>).

Returns a reference so consumers can call .get(), .set(v), .on_changed(...) etc. as before. The backing store lives in Impl, keeping the DLL interface clean.

is_active() [2/2]

const Property< bool > & aria::binding::ViewModel::is_active ( ) const

nodiscard

on_activate()

virtual void aria::binding::ViewModel::on_activate ( )

inlinevirtual

on_deactivate()

virtual void aria::binding::ViewModel::on_deactivate ( )

inlinevirtual

activate()

void aria::binding::ViewModel::activate

(

)

deactivate()

void aria::binding::ViewModel::deactivate

(

)

add_child()

void aria::binding::ViewModel::add_child

(

std::shared_ptr< ViewModel >

child

)

track()

void aria::binding::ViewModel::track

(

Subscription

sub

)

Add a subscription that will be released on destruction.

add_destroy_hook()

void aria::binding::ViewModel::add_destroy_hook

(

std::function< void()>

hook

)

bag()

SubscriptionBag & aria::binding::ViewModel::bag ( )

nodiscardprotected

Access the subscription bag.

Subclass VMs use this to attach subscriptions that auto-clean on deactivation/destruction.

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The documentation for this class was generated from the following file:

• modules/binding/include/aria/binding/view_model.hpp