Kanzi  3.9.5
Kanzi Engine API
kanzi::Action Class Referenceabstract

Actions are small operations that Kanzi executes when the trigger event that contains that action occurs and the trigger conditions are met. More...

#include <kanzi/core.ui/action/action.hpp>

Inheritance diagram for kanzi::Action:
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Public Member Functions

void attach (Trigger *trigger)
 Attaches an Action to a Trigger. More...
 
ActionSharedPtr copy () const
 
void detach ()
 Detaches the Action from the Trigger. More...
 
TriggergetTrigger () const
 Returns the pointer to a Trigger to which an Action is attached. More...
 
void invoke ()
 Invokes the Action. More...
 
- Public Member Functions inherited from kanzi::ActionBase
string getName () const
 Returns the name of the action. More...
 
- Public Member Functions inherited from kanzi::Object
AppliedStyleEntrySharedPtr applyObjectStyle (kanzi::StyleSharedPtr style)
 Applies a style to an object. More...
 
void applyObjectStyles ()
 Apply all styles for an object node. More...
 
DomaingetDomain () const
 Returns the domain the object belongs to. More...
 
const MetaclassgetDynamicMetaclass () const override
 Returns the metaclass of the dynamic type of the object. More...
 
MainLoopSchedulergetMainLoopScheduler () const
 Returns the MainLoopScheduler instance of the associated Domain. More...
 
detail::MessageDispatcher * getMessageDispatcher () const
 Returns the message dispatcher of the object. More...
 
ResourceManagergetResourceManager () const
 Returns the resource manager of the object. More...
 
ScriptingContextSharedPtr getScriptingContext () const
 Gets the scripting context of the object. More...
 
 Object (Domain *domain)
 
void setScriptingContext (ScriptingContextSharedPtr context)
 Sets the scripting context of the object. More...
 
void unapplyObjectStyle (AppliedStyleEntrySharedPtr appliedStyleEntry)
 
void unapplyObjectStyles ()
 Unapplies and removes all applied styles. More...
 
 ~Object () override
 
- Public Member Functions inherited from kanzi::MetaObject
bool isTypeOf (const Metaclass *objectType) const
 Determines if the type of this object is the given type or derived from it. More...
 
virtual ~MetaObject ()
 
- Public Member Functions inherited from kanzi::PropertyObject
template<typename DataType >
void addPropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)
 
template<typename DataType >
void addPropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)
 
template<typename DataType >
void addPropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource *valueSource, PropertyValuePrecedence precedence, void *ownerPointer)
 
template<typename DataType >
void addPropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource *valueSource, PropertyValuePrecedence precedence, AbstractPropertyTypeDescriptor::ValueSourceOwner *owner)
 
PropertyStorageContainer::iterator beginPropertyStorage ()
 Returns the begin iterator to the internal property storage container. More...
 
PropertyStorageContainer::const_iterator beginPropertyStorage () const
 Returns the begin iterator to the internal property storage container. More...
 
void clearPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)
 
void copyLocalValue (const PropertyObject &other, AbstractPropertyType propertyType)
 Copies local value of single property from another object. More...
 
void copyLocalValues (const PropertyObject &other)
 Copies all local values from another object. More...
 
PropertyStorageContainer::iterator endPropertyStorage ()
 Returns the end iterator to the internal property storage container. More...
 
PropertyStorageContainer::const_iterator endPropertyStorage () const
 Returns the end iterator to the internal property storage container. More...
 
template<typename DataType >
PropertyType< DataType >::Traits::ReturnType getAbstractProperty (AbstractPropertyType abstractPropertyType) const
 
template<typename DataType >
PropertyType< DataType >::Traits::ReturnType getAbstractPropertyBase (AbstractPropertyType abstractPropertyType) const
 
template<typename DataType >
optional< typename PropertyType< DataType >::Traits::ReturnType > getOptionalAbstractProperty (AbstractPropertyType abstractPropertyType) const
 
template<typename DataType >
optional< typename PropertyType< DataType >::Traits::ReturnType > getOptionalProperty (const PropertyType< DataType > &propertyType) const
 Evaluates the property value in the same way as the overload above but does not default to the value in property metadata if there are no inputs to the property value. More...
 
template<typename DataType >
optional< typename PropertyType< DataType >::Traits::ReturnType > getOptionalPropertyBase (const PropertyType< DataType > &propertyType) const
 Returns the current value of a property disregarding modifiers, but does not default to the value in property metadata if there are no inputs to the property value. More...
 
template<typename DataType >
PropertyType< DataType >::Traits::ReturnType getProperty (const PropertyType< DataType > &propertyType) const
 Returns the current value of a property type. More...
 
template<typename DataType >
PropertyType< DataType >::Traits::ReturnType getPropertyBase (const PropertyType< DataType > &propertyType) const
 Returns the current value of a property disregarding modifiers. More...
 
template<typename DataType >
size_t getPropertyNotificationHandlerCount (const PropertyType< DataType > &propertyType) const
 Gets number of current notification handlers for given property type. More...
 
bool hasBaseValue (AbstractPropertyType propertyType) const
 Evaluates whether there are any inputs into the property value, disregarding modifiers. More...
 
bool hasLocalValue (AbstractPropertyType propertyType) const
 Evaluates whether there is a local value set for the property. More...
 
bool hasNonClassValue (AbstractPropertyType propertyType) const
 Evaluates whether there is a value of any precedence higher than class default value set for the property. More...
 
bool hasValue (AbstractPropertyType propertyType) const
 Evaluates whether there are any inputs into the property value. More...
 
bool isPropertyFlagSet (AbstractPropertyType propertyType, uint32_t flag) const
 
virtual void onPropertyChanged (AbstractPropertyType propertyType, PropertyNotificationReason reason)
 Virtual function to handle property change notifications. More...
 
 PropertyObject ()
 
void removeKzbProperties (flat_set< AbstractPropertyType > *keepProperties)
 Remove all KZB properties that are not included in a given set. More...
 
void removeKzbProperties ()
 Remove all KZB properties. More...
 
template<typename DataType >
void removeLocalPropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource *valueSource, void *ownerPointer)
 
void removeLocalValue (AbstractPropertyType propertyType)
 Removes the local value associated with the property. More...
 
template<typename DataType >
void removePropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)
 
template<typename DataType >
void removePropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)
 
template<typename DataType >
void removePropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource *valueSource, void *ownerPointer)
 
template<typename DataType >
void setAbstractProperty (AbstractPropertyType abstractPropertyType, typename PropertyType< DataType >::Traits::ParameterType value)
 
template<typename DataType >
void setProperty (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Traits::ParameterType value)
 Sets the local value of a property type. More...
 
void setPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)
 
void validatePropertyModifiers (AbstractPropertyType propertyType)
 
virtual ~PropertyObject ()
 

Static Public Member Functions

static PropertyTypeEditorInfoSharedPtr makeEditorInfo ()
 Provides the Kanzi Studio editor metadata for the SetPropertyAction. More...
 
- Static Public Member Functions inherited from kanzi::ActionBase
static ActionBaseSharedPtr loadAction (Domain *domain, KzbFile &kzbFile, KzbMemoryParser &parser)
 Loads an ActionBase from a kzb file. More...
 
static PropertyTypeEditorInfoSharedPtr makeEditorInfo ()
 Provides the Kanzi Studio editor metadata for the ActionBase. More...
 
template<typename TAction >
static shared_ptr< TAction > loadAction (Domain *domain, KzbFile &kzbFile, KzbMemoryParser &parser)
 Loads an TAction from a kzb file. More...
 
- Static Public Member Functions inherited from kanzi::Object
static const MetaclassgetStaticMetaclass ()
 Returns the metaclass of Object class. More...
 
static PropertyTypeEditorInfoSharedPtr makeEditorInfo ()
 Default implementation that returns empty editor info. More...
 
- Static Public Member Functions inherited from kanzi::MetaObject
static const MetaclassgetStaticMetaclass ()
 Returns the metaclass of Object class. More...
 
static PropertyTypeEditorInfoSharedPtr makeEditorInfo ()
 Default implementation that returns empty editor info. More...
 

Protected Member Functions

 Action (Domain *domain, string_view name)
 Constructor. More...
 
virtual ActionSharedPtr clone () const =0
 Overridable function for copying an Action. More...
 
virtual void onDelayedInvoke ()
 Callback called by Kanzi when the action is invoked by trigger with delay, after the delay duration expires. More...
 
virtual void onInvoke ()
 Callback called by Kanzi when the action is invoked by its trigger without delay. More...
 
virtual void onPrepareDelayedInvoke ()
 Callback called by Kanzi when the action is invoked by its trigger with delay. More...
 
virtual void onUnprepareDelayedInvoke ()
 Kanzi calls this callback when an action is invoked by trigger with delay, after onDelayedInvoke() callback, or when it cancels a delayed execution. More...
 
- Protected Member Functions inherited from kanzi::ActionBase
 ActionBase (Domain *domain, string_view name)
 Constructor. More...
 
virtual void load (KzbFile &, KzbMemoryParser &parser)
 Overridable function for loading an action from a kzb file. More...
 
virtual void onAttach ()
 Overridable method called during attach. More...
 
virtual void onDetach ()
 Overridable method called during detach. More...
 
- Protected Member Functions inherited from kanzi::Object
void initialize ()
 
void onCopy (const Object &other)
 
- Protected Member Functions inherited from kanzi::MetaObject
void initialize ()
 
 MetaObject ()
 
- Protected Member Functions inherited from kanzi::PropertyObject
AbstractPropertyTypeDescriptor::ValueSourceEntryacquireLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor, PropertyStoragePtr &propertyStorage)
 Acquires a local value source entry that is free for the assignment of a value. More...
 
AbstractPropertyTypeDescriptor::ModifierStorageacquireModifierStorage (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)
 
AbstractPropertyTypeDescriptor::NotificationStorageacquireNotificationStorage (AbstractPropertyTypeDescriptor &descriptor)
 
PropertyStoragePtr acquirePropertyStorage (AbstractPropertyTypeDescriptor &descriptor)
 
void addPropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource *valueSource, PropertyValuePrecedence precedence, void *ownerPointer)
 Internally adds a property value source. More...
 
void addPropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource *valueSource, PropertyValuePrecedence precedence, AbstractPropertyTypeDescriptor::ValueSourceOwner *owner)
 Internally adds a property value source. More...
 
AbstractPropertyTypeDescriptor::ValueSourceEntryconstructLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)
 
PropertyStoragePtr constructPropertyStorage (AbstractPropertyTypeDescriptor &descriptor)
 
void copyLocalValue (const AbstractPropertyTypeDescriptor::PropertyStorage &otherPropertyStorage)
 Copy local value from property storage. More...
 
AbstractPropertyTypeDescriptor::ModifierStoragefindModifierStorage (AbstractPropertyTypeDescriptor &descriptor)
 
AbstractPropertyTypeDescriptor::NotificationStoragefindNotificationStorage (AbstractPropertyTypeDescriptor &descriptor) const
 
AbstractPropertyTypeDescriptor::PropertyStoragefindPropertyStorage (AbstractPropertyTypeDescriptor &descriptor) const
 Gets the property storage for given property type descriptor. More...
 
PropertyStoragePtr findPropertyStoragePtr (AbstractPropertyTypeDescriptor &descriptor) const
 Gets property storage intrusive pointer which you can use to hold a reference until the end of the operation. More...
 
AbstractPropertyTypeDescriptorfindPropertyTypeDescriptorByNameAndDataType (string_view name, PropertyDataType dataType) const
 Finds a property type descriptor by name and data type. More...
 
AbstractPropertyTypeDescriptorfindPropertyTypeDescriptorByQualifiedNameAndDataType (string_view qualifiedName, PropertyDataType dataType) const
 Like findPropertyTypeDescriptorByNameAndDataType, but only searches by matching with qualified names. More...
 
AbstractPropertyTypeDescriptorfindPropertyTypeDescriptorByUnqualifiedNameAndDataType (string_view unqualifiedName, PropertyDataType dataType) const
 Like findPropertyTypeDescriptorByNameAndDataType, but only searches by matching with unqualified names. More...
 
AbstractPropertyTypeDescriptor::ValueSourcegetClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const
 
AbstractPropertyTypeDescriptor::ValueSourcegetFinalValueSource (AbstractPropertyTypeDescriptor &descriptor) const
 
AbstractPropertyTypeDescriptor::ValueSourcegetNonClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const
 
AbstractPropertyTypeDescriptor::ValueSourcegetTopValueSource (AbstractPropertyTypeDescriptor &descriptor) const
 Gets the top-level value source for a given property descriptor. More...
 
virtual void notifyPropertyHandlers (PropertyStoragePtr &propertyStorage, PropertyNotificationReason reason)
 
void onCopy (const PropertyObject &other)
 
void removeLocalValue (AbstractPropertyTypeDescriptor &descriptor, PropertyStoragePtr &propertyStorage)
 Removes a local value from the given property storage. More...
 
void removePropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource *valueSource, void *owner)
 Removes a property value source. More...
 
void validatePropertyModifiersAndNotifyHandlers (PropertyStoragePtr &propertyStorage)
 

Properties

static PropertyType< int > DelayProperty
 Delays all invocations of an action by the amount in milliseconds. More...
 
chrono::milliseconds getDelay () const
 Returns the delay in milliseconds that Kanzi waits before it invokes an action. More...
 
void setDelay (chrono::milliseconds delay)
 Sets the delay in milliseconds that Kanzi waits before it invokes an action. More...
 

Additional Inherited Members

- Public Types inherited from kanzi::PropertyObject
typedef PropertyStorageContainer::const_iterator PropertyStorageConstIterator
 
typedef vector< PropertyStoragePtrPropertyStorageContainer
 
typedef PropertyStorageContainer::iterator PropertyStorageIterator
 
typedef intrusive_ptr< AbstractPropertyTypeDescriptor::PropertyStoragePropertyStoragePtr
 
typedef PropertyStorageContainer::reverse_iterator PropertyStorageReverseIterator
 
- Protected Types inherited from kanzi::Object
typedef vector< AppliedStyleEntrySharedPtrAppliedStyleContainer
 Applied style container. More...
 
- Protected Attributes inherited from kanzi::Object
AppliedStyleContainer m_appliedStyles
 Listing of applied styles applied to this object. More...
 

Detailed Description

Actions are small operations that Kanzi executes when the trigger event that contains that action occurs and the trigger conditions are met.

Action is the base class for actions. For example, if you want to perform a simple operation, such as set a value of a property, you can use a trigger with the SetPropertyAction action.

Kanzi provides a number of built-in action classes, such as SetPropertyAction that you can use to set the value of a property of a target node, and DispatchMessageAction that you can use to dispatch a message of specified type to a specified target. However, Kanzi also enables you to define your own actions by deriving from the Action class.

When you want to create an action that receives arguments of its triggering message or properties of a node, derive that action from the ForwardingAction class, which provides generic functionality for this purpose.

You can delay the invocation of an action by the amount of time that you set in the DelayProperty.

Examples

To create a custom action class:

class SetVisibilityAction;
typedef shared_ptr<SetVisibilityAction> SetVisibilityActionSharedPtr;
// A sample action class that sets the Node::VisibleProperty in the host node based on the value of its own ValueProperty.
class SetVisibilityAction : public Action
{
public:
// Declare properties.
static PropertyType<bool> ValueProperty;
// Register the class and its properties.
KZ_METACLASS_BEGIN(SetVisibilityAction, Action, "ActionSnippet.SetVisibilityAction")
// Define constructor and create functions.
explicit SetVisibilityAction(Domain* domain, string_view name) :
Action(domain, name)
{
}
static SetVisibilityActionSharedPtr create(Domain* domain, string_view name)
{
return make_shared<SetVisibilityAction>(domain, name);
}
// Implement makeEditorInfo() to register metadata with Kanzi Studio.
{
metadata.displayName = "Set Visibility";
metadata.tooltip = "Sets the visibility of the host node.";
));
}
protected:
// Implement clone() override.
// Kanzi calls this function on the action instance loaded inside a prefab,
// to create a copy that it attaches to the host trigger.
ActionSharedPtr clone() const override
{
// Create an instance of SetVisibilityAction.
auto action = make_shared<SetVisibilityAction>(getDomain(), getName());
// Copy to the action the required data.
action->onCopy(*this);
return action;
}
// Implement onCopy(). You call this function from the clone() implementation, to copy the required data from a prefab instance to the copy.
void onCopy(const SetVisibilityAction& other)
{
// Call base class implementation.
// Copy any additional data.
}
// In onInvoke() override, implement the behavior of the action when Kanzi executes the action without a delay.
void onInvoke() override
{
// Get the value of the action's ValueProperty.
bool value = getProperty(ValueProperty);
// Apply to the trigger's host.
getTrigger()->getNode()->setProperty(Node::VisibleProperty, value);
}
// In onPrepareDelayedInvoke() override, implement preparations for the delayed execution of the action.
void onPrepareDelayedInvoke() override
{
// Call base class implementation.
// Cache the current value of the ValueProperty.
m_cachedValueProperty = getProperty(ValueProperty);
}
// In onPrepareDelayedInvoke() override, implement the delayed execution behavior, that is when the delay duration has expired.
void onDelayedInvoke() override
{
// Apply the cached value of the ValueProperty to the host of the trigger.
getTrigger()->getNode()->setProperty(Node::VisibleProperty, m_cachedValueProperty);
// Call the base class implementation.
}
// In onUnprepareDelayedInvoke() override, implement rollback for any prepations made in onPrepareDelayedInvoke().
// Kanzi calls this callback when an action is invoked by trigger with delay, after onDelayedInvoke() callback, or when it cancels a delayed execution.
// An example of cancellation of delayed execution is when you detach the action before the execution is done.
void onUnprepareDelayedInvoke() override
{
// Call the base class implementation.
}
private:
bool m_cachedValueProperty = false;
};

Constructor & Destructor Documentation

◆ Action()

kanzi::Action::Action ( Domain domain,
string_view  name 
)
explicitprotected

Constructor.

Parameters
domainPointer to the domain.
nameName for the action.

Member Function Documentation

◆ getDelay()

chrono::milliseconds kanzi::Action::getDelay ( ) const
inline

Returns the delay in milliseconds that Kanzi waits before it invokes an action.

You can set the delay in the DelayProperty.

Returns
Delay for the action in milliseconds.

◆ setDelay()

void kanzi::Action::setDelay ( chrono::milliseconds  delay)
inline

Sets the delay in milliseconds that Kanzi waits before it invokes an action.

Parameters
delayThe delay in milliseconds for invoking the action.

◆ makeEditorInfo()

static PropertyTypeEditorInfoSharedPtr kanzi::Action::makeEditorInfo ( )
static

Provides the Kanzi Studio editor metadata for the SetPropertyAction.

Returns
Shared pointer to the created PropertyTypeEditorInfo instance.

◆ invoke()

void kanzi::Action::invoke ( )

Invokes the Action.

◆ copy()

ActionSharedPtr kanzi::Action::copy ( ) const
Returns
Shared pointer to the created Action instance.

◆ getTrigger()

Trigger* kanzi::Action::getTrigger ( ) const

Returns the pointer to a Trigger to which an Action is attached.

Returns
The pointer to the Trigger.

◆ attach()

void kanzi::Action::attach ( Trigger trigger)

Attaches an Action to a Trigger.

Parameters
triggerPointer to the Trigger to which you want to attach the Action.

◆ detach()

void kanzi::Action::detach ( )

Detaches the Action from the Trigger.

◆ clone()

virtual ActionSharedPtr kanzi::Action::clone ( ) const
protectedpure virtual

Overridable function for copying an Action.

Implementations must call onCopy() on the new instances.

Implemented in kanzi::DispatchMessageAction, kanzi::SetPropertyAction, kanzi::WriteLogAction, kanzi::MoveFocusAction, and kanzi::TrySetFocusAction.

◆ onInvoke()

virtual void kanzi::Action::onInvoke ( )
protectedvirtual

Callback called by Kanzi when the action is invoked by its trigger without delay.

Use this to execute an action without delay.

Reimplemented in kanzi::ForwardingAction, kanzi::DispatchMessageAction, kanzi::SetPropertyAction, kanzi::WriteLogAction, kanzi::MoveFocusAction, and kanzi::TrySetFocusAction.

◆ onPrepareDelayedInvoke()

virtual void kanzi::Action::onPrepareDelayedInvoke ( )
protectedvirtual

Callback called by Kanzi when the action is invoked by its trigger with delay.

Use this to prepare for delayed execution.

Reimplemented in kanzi::ForwardingAction, kanzi::DispatchMessageAction, and kanzi::SetPropertyAction.

◆ onDelayedInvoke()

virtual void kanzi::Action::onDelayedInvoke ( )
protectedvirtual

Callback called by Kanzi when the action is invoked by trigger with delay, after the delay duration expires.

Use this to execute an action with delay.

Reimplemented in kanzi::DispatchMessageAction, kanzi::SetPropertyAction, kanzi::WriteLogAction, kanzi::MoveFocusAction, and kanzi::TrySetFocusAction.

◆ onUnprepareDelayedInvoke()

virtual void kanzi::Action::onUnprepareDelayedInvoke ( )
protectedvirtual

Kanzi calls this callback when an action is invoked by trigger with delay, after onDelayedInvoke() callback, or when it cancels a delayed execution.

An example of cancellation of delayed execution is when you detach the action before the execution is done. Use this function to roll back any preparations made for a delayed execution.

Member Data Documentation

◆ DelayProperty

PropertyType<int> kanzi::Action::DelayProperty
static

Delays all invocations of an action by the amount in milliseconds.

The default value is 0.

See also
setDelay(), getDelay()

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