Base class for Activity classes. More...

#include <kanzi/ui/node/concept/activity/activity_concept.hpp>

Inheritance diagram for kanzi::ActivityConcept:

Classes
class	ActivityInternalMessageArguments
	Class for all the internal Activity messages that do not require any message arguments. More...

class	ActivityMessageArguments
	Message arguments that hold the name of the Activity included in the message. More...

class	StartActivationInternalMessageArguments
	Message arguments for the StartActivationInternalMessage. More...

class	StatusChangedInternalMessageArguments
	Message arguments for internal Activity messages related to Activity status changes. More...

class	StatusChangedMessageArguments
	Message arguments for the StatusChangedMessage. More...

Public Types
enum	Status { Status::Active, Status::Inactive, Status::Activating, Status::Deactivating }
	Defines possible states of an Activity. More...

Public Member Functions
void	cancelWaitBeforeFocus ()
	Makes an Activity no longer wait for any pending activations. More...

virtual bool	collectActivatingDescendantActivities ()=0
	Returns whether any Activities are activating in the descendant Activity Hosts whose parent Activity this Activity is. More...

virtual void	enableFocusGain (bool enable)=0
	Enables an overlay scope Activity to gain focus automatically when activated. More...

virtual void	enableFocusRecovery (bool enable)=0
	Enables Kanzi to automatically recover focus when an overlay scope Activity is deactivated. More...

virtual void	enableInput (bool enable)=0
	Enables input handling for an Activity that is an overlay-type focus scope. More...

virtual Node *	getNode ()=0
	Gets the underlying Node object. More...

virtual const Node *	getNode () const =0
	Gets the underlying Node object. More...

virtual ActivityConcept *	getParentActivity ()=0
	Returns the parent Activity. More...

optional< string >	getPathToActivity (ActivityConcept *activity) const
	Returns a path from this Activity to a given Activity, if that Activity is a descendant node of this Activity. More...

virtual bool	isAutoClosingBecauseFocusMove () const =0
	Returns whether an Activity is deactivating because it is an auto-closing overlay scope and focus moves below it. More...

bool	isWaitingActivationsBeforeFocus () const
	Returns whether an Activity is waiting for its descendant Activities to activate before Kanzi applies the focus policy to the activated Activity. More...

bool	isWaitingForActivation (ActivityConcept *activity) const
	Returns whether an Activity is waiting for the activation of a given Activity. More...

virtual void	notifyPendingActivationBeforeFocusFinished (string_view activityName)=0
	Notifies the Activity that a descencant Activity, for whose activation this Activity waited, finished activating. More...

virtual void	restoreLastFocusedNode ()=0
	Restores the focus to a child node of this Activity, if this Activity: More...

virtual void	setLastFocusedNodePath ()=0
	Sets the last focused node path of this Activity to the currently focused child node, if the Activity: More...

virtual void	tryRestoreLastFocusedPathCompletely (const Node *candidateChild)=0
	Tries to recursively restore the last focused node path in this and each ancestor Activity. More...

virtual	~ActivityConcept ()=default
	Destructor. More...

Static Public Member Functions
template<typename Type >
static bool	isActivity (const Type &object)
	Returns whether an object is an Activity. More...

static bool	isActivityMetaclass (const Metaclass *metaclass)
	Checks whether the given Metaclass is an ActivityConcept metaclass or contains it as a mixin metaclass. More...

static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()

Static Public Attributes
static NodeWeakPtr	s_activationTargetActivity
	The Activity that is the activation target. More...

Properties
static PropertyType< Status >	StatusProperty
	Specifies the status of this Activity. More...

static PropertyType< float >	DummyStateManagerProperty
	Lack of a queuing mechanism for incoming messages from an Activity Host can cause Kanzi to enter a recursive call in the setProperty(). More...

static PropertyType< bool >	ActivatedByActivationModifierProperty
	Specifies whether the activation of an Activity is requested by modifier bindings callbacks of an ApplyAction of a DataTrigger. More...

static PropertyType< bool >	SaveLastFocusedNodeProperty
	Indicates whether to serialize the last focused child node of a focus scope Activity and restore the focus on deserialization. More...

Messages
static MessageType< StatusChangedMessageArguments >	StatusChangedMessage
	Subscribe to this message to receive notifications when the ActivityConcept::Status of this Activity changes. More...

static MessageType< ActivityMessageArguments >	ActivityActivatingMessage
	Subscribe to this message to receive notifications when this Activity is in the activating state. More...

static MessageType< ActivityMessageArguments >	ActivityActivatedMessage
	Subscribe to this message to receive notifications when this Activity is activated. More...

static MessageType< ActivityMessageArguments >	ActivityDeactivatingMessage
	Subscribe to this message to receive notifications when this Activity is in the deactivating state. More...

static MessageType< ActivityMessageArguments >	ActivityDeactivatedMessage
	Subscribe to this message to receive notifications when this Activity is deactivated. More...

Internal Messages
static MessageType< StartActivationInternalMessageArguments >	StartActivationInternalMessage
	Internal message sent by an Activity Host to the Activity to initialize the resources of the Activity. More...

static MessageType< ActivityInternalMessageArguments >	StartDeactivationInternalMessage
	Internal message sent by an Activity Host to the Activity to deactivate the Activity. More...

static MessageType< StatusChangedInternalMessageArguments >	ReadyForActivationAnimationInternalMessage
	Internal message sent by the Activity to its parent Activity Host when the Activity has finished initializing its resources. More...

static MessageType< ActivityInternalMessageArguments >	StartParallelActivatingAnimationInternalMessage
	Internal message sent by an Activity Host to the Activity to start the parallel activation animation of the Activity. More...

static MessageType< StatusChangedInternalMessageArguments >	FinishedParallelActivatingAnimationInternalMessage
	Internal message sent by the Activity to its parent Activity Host when the Activity has finished the parallel activation animation of the Activity. More...

static MessageType< ActivityInternalMessageArguments >	StartExclusiveActivatingAnimationInternalMessage
	Internal message sent by an Activity Host to the Activity to start the exclusive activation animation of the Activity. More...

static MessageType< ActivityInternalMessageArguments >	StartExclusiveDeactivatingAnimationInternalMessage
	Internal message sent by an Activity Host to the Activity to start the exclusive deactivation animation of the Activity. More...

static MessageType< StatusChangedInternalMessageArguments >	FinishedExclusiveDeactivatingAnimationInternalMessage
	Internal message sent by the Activity to its parent Activity Host when the Activity has finished the exclusive deactivation animation of the Activity. More...

static MessageType< ActivityInternalMessageArguments >	StartParallelDeactivatingAnimationInternalMessage
	Internal message sent by an Activity Host to the Activity to start the parallel deactivation animation of the Activity. More...

static MessageType< StatusChangedInternalMessageArguments >	FinishedParallelDeactivatingAnimationInternalMessage
	Internal message sent by the Activity to its parent Activity Host when the Activity has finished the parallel deactivation animation of the Activity. More...

Protected Attributes
vector< string >	m_pendingActivationsBeforeFocus
	The paths of the activating Activities that this Activity is waiting to be activated. More...

Detailed Description

Base class for Activity classes.

This class defines common types, properties, and messages for Activity classes.

See also: Activity2D, Activity3D

Member Enumeration Documentation

enum kanzi::ActivityConcept::Status

strong

Defines possible states of an Activity.

Activity Host nodes can activate and deactivate their child Activities. This enumeration defines the possible states of an Activity during the the process of activation and deactivation. You can use this functionality to react to changes in Activity status in your application code and in Kanzi Studio.

See also: Activity, StatusProperty

Enumerator
Active	The Activity is active. In an Exclusive Activity Host only one child Activity can be in the Active state at a time. In a Parallel Activity Host more than one Activity can be in the Active state at the same time, therefore any Activity can be in any state.
Inactive	The Activity is inactive. Inactive Activities do not show their content.
Activating	The Activity is transitioning into the active state. In an Exclusive Activity Host while one Activity is in Activating state, another Activity can be in the Deactivating state at the same time. In a Parallel Activity Host more than one Activity can be in the Active state at the same time, therefore any Activity can be in any state.
Deactivating	The Activity is transitioning into the inactive state. In an Exclusive Activity Host while one Activity is in Deactivating state, another Activity can at the same time be in the Activating state. In a Parallel Activity Host more than one Activity can be in the Active state at the same time, therefore any Activity can be in any state.

Constructor & Destructor Documentation

virtual kanzi::ActivityConcept::~ActivityConcept ( )

virtualdefault

Destructor.

Member Function Documentation

static PropertyTypeEditorInfoSharedPtr kanzi::ActivityConcept::makeEditorInfo ( )

static

virtual Node* kanzi::ActivityConcept::getNode ( )

pure virtual

Gets the underlying Node object.

Returns: The underlying Node object pointer.

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual const Node* kanzi::ActivityConcept::getNode ( ) const

pure virtual

Gets the underlying Node object.

Returns: The underlying Node object pointer.

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::restoreLastFocusedNode ( )

pure virtual

Restores the focus to a child node of this Activity, if this Activity:

Is a focus scope node
Has serialized the last focused node
The serialized last focused node is a focusable node and is not an Activity

If Kanzi successfully restores the focus, it clears the value of the Kanzi internal property FocusScopeCore::LastFocusedNodePathProperty.

Since: Kanzi 3.9.2. Moved the function declaration and definition from ActivityElement to ActivityConcept and to ActivityConceptImpl.

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::setLastFocusedNodePath ( )

pure virtual

Sets the last focused node path of this Activity to the currently focused child node, if the Activity:

Is a focus scope node
Has ActivityConcept::SaveLastFocusedNodeProperty set to true

Since: Kanzi 3.9.2. Moved the function declaration and definition from ActivityElement to ActivityConcept and to ActivityConceptImpl.

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::tryRestoreLastFocusedPathCompletely ( const Node * candidateChild )

pure virtual

Tries to recursively restore the last focused node path in this and each ancestor Activity.

Parameters

candidateChild The child Activity where the last focused node path of this Activity is pointing, in order for the restoring to succeed.

Since: Kanzi 3.9.2

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual ActivityConcept* kanzi::ActivityConcept::getParentActivity ( )

pure virtual

Returns the parent Activity.

Returns: The parent Activity. If this Activity is the top-most Activity in the Activity tree, returns nullptr.

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual bool kanzi::ActivityConcept::collectActivatingDescendantActivities ( )

pure virtual

Returns whether any Activities are activating in the descendant Activity Hosts whose parent Activity this Activity is.

Returns: If there is at least one activating descendant Activity, true, otherwise false.

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::notifyPendingActivationBeforeFocusFinished ( string_view activityName )

pure virtual

Notifies the Activity that a descencant Activity, for whose activation this Activity waited, finished activating.

Parameters

activityName Name of the Activity that activated.

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

optional<string> kanzi::ActivityConcept::getPathToActivity ( ActivityConcept * activity ) const

Returns a path from this Activity to a given Activity, if that Activity is a descendant node of this Activity.

Returns: If activity is a descendant node of this Activity, returns the path from this Activity to activity. If activity is not a descendant node of this Activity, returns nullopt.

Since: Kanzi 3.9.4

bool kanzi::ActivityConcept::isWaitingForActivation ( ActivityConcept * activity ) const

Returns whether an Activity is waiting for the activation of a given Activity.

Returns: If the Activity is waiting for the activation of activity, true, otherwise false.

Since: Kanzi 3.9.4

bool kanzi::ActivityConcept::isWaitingActivationsBeforeFocus ( ) const

Returns whether an Activity is waiting for its descendant Activities to activate before Kanzi applies the focus policy to the activated Activity.

Returns: If an Activity is waiting for descendant Activities to activate before Kanzi applies the focus policy to the activated Activity, true, otherwise false.

See also: ExclusiveActivityHostConcept::ExclusiveActivityHostFocusingPolicy, ParallelActivityHostConcept::ParallelActivityHostFocusingPolicy

Since: Kanzi 3.9.4

void kanzi::ActivityConcept::cancelWaitBeforeFocus ( )

Makes an Activity no longer wait for any pending activations.

Call this function when the Activity is no longer the activation target or when the Activity is able to restore the last-focused node and no longer needs to wait for any other Activity to finish activation.

See also: ActivityConcept::s_activationTargetActivity

Since: Kanzi 3.9.4

virtual void kanzi::ActivityConcept::enableFocusRecovery ( bool enable )

pure virtual

Enables Kanzi to automatically recover focus when an overlay scope Activity is deactivated.

To make an Activity an overlay scope, set its FocusManager::FocusScopeTypeProperty to FocusScopeType::Modal, FocusScopeType::Modeless, FocusScopeType::AutoClosingModal, or FocusScopeType::AutoClosingModeless.

Parameters

enable To enable automatic focus recovery by setting focus to another overlay when an overlay Activity is deactivated, set to true. To disable automatic focus recovery when an overlay Activity is deactivated, set to false.

See also: FocusManager, OverlayScope

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::enableFocusGain ( bool enable )

pure virtual

Enables an overlay scope Activity to gain focus automatically when activated.

To make an Activity an overlay scope, set its FocusManager::FocusScopeTypeProperty to FocusScopeType::Modal, FocusScopeType::Modeless, FocusScopeType::AutoClosingModal, or FocusScopeType::AutoClosingModeless.

Parameters

enable To enable automatic focus gain when an overlay scope Activity is activated, set to true. To disable automatic focus gain when an overlay scope Activity is activated, set to false.

See also: FocusManager, OverlayScope

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual void kanzi::ActivityConcept::enableInput ( bool enable )

pure virtual

Enables input handling for an Activity that is an overlay-type focus scope.

To make an Activity an overlay-type focus scope, set its FocusManager::FocusScopeTypeProperty to FocusScopeType::Modal, FocusScopeType::Modeless, FocusScopeType::AutoClosingModal, or FocusScopeType::AutoClosingModeless.

Parameters

enable To enable input handling, set to true. To disable input handling, set to false.

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

virtual bool kanzi::ActivityConcept::isAutoClosingBecauseFocusMove ( ) const

pure virtual

Returns whether an Activity is deactivating because it is an auto-closing overlay scope and focus moves below it.

To make an Activity an auto-closing overlay scope, set its FocusManager::FocusScopeTypeProperty to FocusScopeType::AutoClosingModal or FocusScopeType::AutoClosingModeless.

Returns: If an Activity is deactivating because it is an auto-closing overlay scope and focus moves below it, true, otherwise false.

See also: FocusManager, OverlayScope

Since: Kanzi 3.9.4

Implemented in kanzi::ActivityConceptImpl< TBaseClass, TDerivedClass >, kanzi::ActivityConceptImpl< ContentLayout2D, Activity2D >, and kanzi::ActivityConceptImpl< ContentLayout3D, Activity3D >.

template<typename Type >

static bool kanzi::ActivityConcept::isActivity ( const Type & object )

inlinestatic

Returns whether an object is an Activity.

Parameters

object Object for which you want to check whether it is an Activity.

Returns: If the object is an Activity, returns true, otherwise false.

Since: Kanzi 3.9.2

static bool kanzi::ActivityConcept::isActivityMetaclass ( const Metaclass * metaclass )

inlinestatic

Checks whether the given Metaclass is an ActivityConcept metaclass or contains it as a mixin metaclass.

Parameters

metaclass The metaclass to check.

Returns: If the given metaclass is an ActivityConcept metaclass or contains it as a mixin metaclass, returns true, otherwise false.

Since: Kanzi 3.9.3

Member Data Documentation

PropertyType<Status> kanzi::ActivityConcept::StatusProperty

static

Specifies the status of this Activity.

PropertyType<float> kanzi::ActivityConcept::DummyStateManagerProperty

static

Lack of a queuing mechanism for incoming messages from an Activity Host can cause Kanzi to enter a recursive call in the setProperty().

A temporary solution to this is the DummyStateManagerProperty that Kanzi sets in states with different values, and adds an any-to-any transition with the duration of 1 millisecond.

PropertyType<bool> kanzi::ActivityConcept::ActivatedByActivationModifierProperty

static

Specifies whether the activation of an Activity is requested by modifier bindings callbacks of an ApplyAction of a DataTrigger.

Kanzi uses this property internally to disable serialization and deserialization of the activation status for such Activities.

Since: Kanzi 3.9.0

PropertyType<bool> kanzi::ActivityConcept::SaveLastFocusedNodeProperty

static

Indicates whether to serialize the last focused child node of a focus scope Activity and restore the focus on deserialization.

If an Activity is a focus scope, add and set this property to True when you want to save and restore the focus from a serialized Activity and its focus scope.

Since: Kanzi 3.9.0

MessageType<StatusChangedMessageArguments> kanzi::ActivityConcept::StatusChangedMessage

static

Subscribe to this message to receive notifications when the ActivityConcept::Status of this Activity changes.

MessageType<ActivityMessageArguments> kanzi::ActivityConcept::ActivityActivatingMessage

static

Subscribe to this message to receive notifications when this Activity is in the activating state.

Since: Kanzi 3.9.1.

MessageType<ActivityMessageArguments> kanzi::ActivityConcept::ActivityActivatedMessage

static

Subscribe to this message to receive notifications when this Activity is activated.

Since: Kanzi 3.9.1.

MessageType<ActivityMessageArguments> kanzi::ActivityConcept::ActivityDeactivatingMessage

static

Subscribe to this message to receive notifications when this Activity is in the deactivating state.

Since: Kanzi 3.9.1.

MessageType<ActivityMessageArguments> kanzi::ActivityConcept::ActivityDeactivatedMessage

static

Subscribe to this message to receive notifications when this Activity is deactivated.

Since: Kanzi 3.9.1.

MessageType<StartActivationInternalMessageArguments> kanzi::ActivityConcept::StartActivationInternalMessage

static

Internal message sent by an Activity Host to the Activity to initialize the resources of the Activity.

MessageType<ActivityInternalMessageArguments> kanzi::ActivityConcept::StartDeactivationInternalMessage

static

Internal message sent by an Activity Host to the Activity to deactivate the Activity.

Since: Kanzi 3.9.1. Renamed DeactivateInternalMessage to StartDeactivationInternalMessage.

MessageType<StatusChangedInternalMessageArguments> kanzi::ActivityConcept::ReadyForActivationAnimationInternalMessage

static

Internal message sent by the Activity to its parent Activity Host when the Activity has finished initializing its resources.

MessageType<ActivityInternalMessageArguments> kanzi::ActivityConcept::StartParallelActivatingAnimationInternalMessage

static

Internal message sent by an Activity Host to the Activity to start the parallel activation animation of the Activity.

MessageType<StatusChangedInternalMessageArguments> kanzi::ActivityConcept::FinishedParallelActivatingAnimationInternalMessage

static

Internal message sent by the Activity to its parent Activity Host when the Activity has finished the parallel activation animation of the Activity.

MessageType<ActivityInternalMessageArguments> kanzi::ActivityConcept::StartExclusiveActivatingAnimationInternalMessage

static

Internal message sent by an Activity Host to the Activity to start the exclusive activation animation of the Activity.

MessageType<ActivityInternalMessageArguments> kanzi::ActivityConcept::StartExclusiveDeactivatingAnimationInternalMessage

static

Internal message sent by an Activity Host to the Activity to start the exclusive deactivation animation of the Activity.

MessageType<StatusChangedInternalMessageArguments> kanzi::ActivityConcept::FinishedExclusiveDeactivatingAnimationInternalMessage

static

Internal message sent by the Activity to its parent Activity Host when the Activity has finished the exclusive deactivation animation of the Activity.

MessageType<ActivityInternalMessageArguments> kanzi::ActivityConcept::StartParallelDeactivatingAnimationInternalMessage

static

Internal message sent by an Activity Host to the Activity to start the parallel deactivation animation of the Activity.

MessageType<StatusChangedInternalMessageArguments> kanzi::ActivityConcept::FinishedParallelDeactivatingAnimationInternalMessage

static

Internal message sent by the Activity to its parent Activity Host when the Activity has finished the parallel deactivation animation of the Activity.

NodeWeakPtr kanzi::ActivityConcept::s_activationTargetActivity

static

The Activity that is the activation target.

Kanzi waits for descendant Activities to activate until the last-focused node of the activating Activity tree finishes loading. After that Kanzi applies the focusing policy of the activation target. The activation target is the Activity that the application logic specifically requests to be activated. Any other Activities that Kanzi activates as a side effect are not activation target Activities and Kanzi does not consider their focusing policy this time.

vector<string> kanzi::ActivityConcept::m_pendingActivationsBeforeFocus

protected

The paths of the activating Activities that this Activity is waiting to be activated.

Since: Kanzi 3.9.4

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

kanzi/ui/node/concept/activity/activity_concept.hpp

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation