Pinch input manipulator recognizes the pinch gesture from incoming touch events. More...

#include <kanzi/core.ui/input/pinch_manipulator.hpp>

Inheritance diagram for kanzi::PinchManipulator:

Classes
class	FinishedMessageArguments
	Message arguments for pinch gesture finished message. Inherits argument properties from InputManipulator::InputMessageArguments. More...

class	MovedMessageArguments
	Message arguments for moved message sent during pan gesture. Inherits argument properties from InputManipulator::InputMessageArguments. More...

class	StartedMessageArguments
	Message arguments for pinch gesture started message. Inherits argument properties from InputManipulator::InputMessageArguments. More...

Public Member Functions
void	setScaleRecognitionThreshold (float threshold)
	Set the threshold the fingers have to move away from each other before scale is recognized. The default value is 5 screen units. More...

void	setRotationRecognitionThreshold (float threshold)
	Set the threshold the fingers have to rotate around the midpoint before rotation is recognized. The default value is 5 screen units along the circle. More...

Public Member Functions inherited from kanzi::InputManipulator
	InputManipulator (Domain *domain)
	Constructor. More...

virtual	~InputManipulator ()

void	attach (Node &node)
	Attach the input manipulator to the node. Called automatically when manipulator is added to the node. More...

void	detach ()
	Detach the input manipulator. Called automatically when manipulator is removed from the node. More...

void	reset ()
	Reset manipulator. More...

void	cancel ()
	Notify manipulator of touch canceling. More...

State	getState () const
	Get the state of the manipulator. More...

void	setState (State state)
	Set the state of the manipulator. More...

Node *	getAttachedNode () const
	Get the node the input manipulator is attached to. More...

void	requireToFail (InputManipulatorWeakPtr manipulatorToFail)
	Sets the manipulator that is required to fail before this manipulator can succeed. More...

InputManipulatorWeakPtr	getFailManipulator () const
	Gets the fail manipulator. More...

InputManipulator *	getDependManipulator () const
	Gets the depend manipulator. More...

bool	isHandled () const
	Get the change flag of the manipulator. Used internally. More...

void	setHandled (bool handled)
	Set the change flag of the manipulator. Used internally. More...

void	setInputManager (KzuInputManager *inputManager)
	Attach or detach the input manager to the manipulator during recognition. Used internally. More...

KzuInputManager *	getInputManager () const
	Get the attached input manager of the manipulator. Used internally. More...

bool	isAttached () const
	Tells if the input manipulator is attached (has a valid node reference). More...

void	setReferenceNode (NodeWeakPtr referenceNode)
	Override the attached node as the hit test reference node. More...

void	setTouchEventRoutingMode (TouchEventRoutingMode mode)
	Sets the touch event routing mode used by input manager. More...

TouchEventRoutingMode	getTouchEventRoutingMode ()
	Return the current touch event routing mode. More...

void	addHitTestArguments (MessageArguments &message, const KzuInputTouchPoint &touchPoint)
	Add hit test information arguments to the message from the touch point. More...

Public Member Functions inherited from kanzi::Object
	Object (Domain *domain)

virtual	~Object ()

Domain *	getDomain () const
	Returns the domain the object belongs to. More...

KzuTaskScheduler *	getTaskScheduler () const
	Returns the task scheduler of the object. More...

KzuMessageDispatcher *	getMessageDispatcher () const
	Returns the message dispatcher of the object. More...

ResourceManager *	getResourceManager () const
	Returns the resource manager of the object. More...

virtual const Metaclass *	getDynamicMetaclass () const KZ_OVERRIDE
	Returns the metaclass of the dynamic type of the object. More...

AppliedStyleEntry *	applyObjectStyle (kanzi::StyleSharedPtr style)
	Applies a style to an object. More...

void	unapplyObjectStyle (AppliedStyleEntry *appliedStyleEntry)

void	applyObjectStyles ()
	Apply all styles for an object node. More...

void	unapplyObjectStyles ()
	Unapplies and removes all applied styles. More...

Public Member Functions inherited from kanzi::MetaObject
virtual	~MetaObject ()

bool	isTypeOf (const Metaclass *objectType) const
	Determines if the type of this object is the given type or derived from it. More...

Public Member Functions inherited from kanzi::PropertyObject
	PropertyObject ()

virtual	~PropertyObject ()

template<typename DataType >
void	setProperty (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Traits::ParameterType value)
	Sets the local value of a property. More...

void	removeKzbProperties ()

template<typename DataType >
PropertyType< DataType >::Traits::ReturnType	getProperty (const PropertyType< DataType > &propertyType) const
	Returns the current value of a property. More...

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 >
PropertyType< DataType >::Traits::ReturnType	getPropertyBase (const PropertyType< DataType > &propertyType) const
	Returns the current value of a property disregarding modifiers. More...

template<typename DataType >
void	setAbstractProperty (AbstractPropertyType abstractPropertyType, typename PropertyType< DataType >::Traits::ParameterType value)

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

void	setPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)

bool	isPropertyFlagSet (AbstractPropertyType propertyType, uint32_t flag) const

void	clearPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)

bool	hasValue (AbstractPropertyType propertyType) const
	Evaluates whether there are any inputs into the property value. 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...

void	removeLocalValue (AbstractPropertyType propertyType)
	Removes the local value associated with the property. More...

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...

virtual void	onPropertyChanged (AbstractPropertyType propertyType, PropertyNotificationReason reason)
	Virtual function to handle property change notifications. More...

template<typename DataType >
void	addPropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource valueSource, PropertyValuePrecedence precedence, void owner)

template<typename DataType >
void	removePropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource valueSource, void owner)

template<typename DataType >
void	addPropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)

template<typename DataType >
void	removePropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)

void	validatePropertyModifiers (AbstractPropertyType propertyType)

template<typename DataType >
void	addPropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)

template<typename DataType >
void	removePropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)

template<typename DataType >
size_t	getPropertyNotificationHandlerCount (const PropertyType< DataType > &propertyType)
	Gets number of current notification handlers for given property type. More...

Static Public Member Functions
static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()

static PinchManipulatorSharedPtr	create (Domain *domain, string_view="")

Static Public Member Functions inherited from kanzi::Object
static const Metaclass *	getStaticMetaclass ()
	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 Metaclass *	getStaticMetaclass ()
	Returns the metaclass of Object class. More...

static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()
	Default implementation that returns empty editor info. More...

Public Attributes
float	m_scaleThreshold
	Scale threshold. More...

float	m_rotateThreshold
	Rotate threshold. More...

unsigned int	m_touchIdA
	First touch ID. More...

unsigned int	m_touchIdB
	Second touch ID. More...

bool	m_scaling
	Is scaling. More...

bool	m_rotating
	Is rotating. More...

Vector2	m_normalizedReferenceVector
	Reference direction vector for the difference between the touch points. More...

float	m_referenceScale
	Reference scale of the difference between the touch points. More...

Static Public Attributes
static MessageType< StartedMessageArguments >	StartedMessage
	Message type for notifying start of the pinch gesture. More...

static MessageType< MovedMessageArguments >	MovedMessage
	Message type for notifying scale and rotation updates during pinch gesture. More...

static MessageType< FinishedMessageArguments >	FinishedMessage
	Message type for notifying completion of the pinch gesture. More...

Protected Member Functions
	PinchManipulator (Domain *domain)
	Constructor. More...

virtual void	notifyTouchInside (const TouchInfo &touchInfo) KZ_OVERRIDE
	Touch inside implementation for pinch manipulator. More...

virtual void	notifyTouchOutside (const TouchInfo &touchInfo) KZ_OVERRIDE
	Touch outside implementation for pinch manipulator. More...

virtual void	onReset () KZ_OVERRIDE
	Reset implementation for pinch input manipulator. More...

void	trackPinch (const TouchInfo &touchInfo)
	Update the state of the pinch gesture with the new touch event. More...

Protected Member Functions inherited from kanzi::InputManipulator
virtual void	onAttach ()
	Attach function for input manipulators. More...

virtual void	onDetach ()
	Detach function for input manipulators. More...

virtual void	onCancel ()
	Cancel function for input manipulators. More...

virtual void	onFail ()
	Fail function for input manipulators. More...

Protected Member Functions inherited from kanzi::Object
void	initialize ()

void	onCopy (const Object &other)

Protected Member Functions inherited from kanzi::MetaObject
	MetaObject ()

void	initialize ()

Protected Member Functions inherited from kanzi::PropertyObject
void	addPropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource valueSource, PropertyValuePrecedence precedence, void owner)

void	removePropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource valueSource, void owner)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	getTopValueSourceEntry (AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage) const

AbstractPropertyTypeDescriptor::ValueSourceEntry *	getTopValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getTopValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getFinalValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getNonClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSourceEntry *	findLocalValueSourceEntry (AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	constructLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	acquireLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::PropertyStorage *	findPropertyStorage (AbstractPropertyTypeDescriptor &descriptor) const

PropertyStoragePtr	findPropertyStoragePtr (AbstractPropertyTypeDescriptor &descriptor) const
	Gets property storage intrusive pointer that can be used to hold a reference until end of operation. More...

PropertyStoragePtr	constructPropertyStorage (AbstractPropertyTypeDescriptor &descriptor)

PropertyStoragePtr	acquirePropertyStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::ModifierStorage *	acquireModifierStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::ModifierStorage *	findModifierStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::NotificationStorage *	acquireNotificationStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::NotificationStorage *	findNotificationStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor *	findPropertyTypeDescriptorByUnqualifiedNameAndDataType (string_view unqualifiedName, PropertyDataType dataType)

void	validatePropertyModifiersAndNotifyHandlers (PropertyStoragePtr &propertyStorage)

void	copyLocalValue (const AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)
	Copy local value from property storage. More...

PropertyStorageContainer::iterator	beginPropertyStorage ()

PropertyStorageContainer::iterator	endPropertyStorage ()

virtual void	notifyPropertyHandlers (PropertyStoragePtr &propertyStorage, PropertyNotificationReason reason)

void	onCopy (const PropertyObject &other)

Additional Inherited Members
Public Types inherited from kanzi::InputManipulator
enum	State { StateReady, StatePossible, StateBegin, StateChange, StateEnd, StateFail, StateDelayed, StateCanceled }
	Enumeration for possible input manipulator states during touch or mouse input sequence. More...

enum	TouchEventRoutingMode { RoutingBubbling, RoutingTunneling }
	Enumeration for possible touch event routing modes. More...

typedef vector< KzuInputTouchPoint * >	TouchPointsContainer

typedef TouchPointsContainer::const_iterator	TouchPointsConstIterator

Public Types inherited from kanzi::PropertyObject
typedef intrusive_ptr< AbstractPropertyTypeDescriptor::PropertyStorage >	PropertyStoragePtr

typedef vector< PropertyStoragePtr >	PropertyStorageContainer

typedef PropertyStorageContainer::iterator	PropertyStorageIterator

typedef PropertyStorageContainer::const_iterator	PropertyStorageConstIterator

typedef PropertyStorageContainer::reverse_iterator	PropertyStorageReverseIterator

Protected Types inherited from kanzi::Object
typedef vector< AppliedStyleEntry * >	AppliedStyleContainer
	Applied style container. More...

Static Protected Member Functions inherited from kanzi::InputManipulator
static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()

Protected Attributes inherited from kanzi::Object
AppliedStyleContainer	m_appliedStyles
	Listing of applied styles applied to this object. More...

Detailed Description

Pinch input manipulator recognizes the pinch gesture from incoming touch events.

It generates the required messages to implement the logic for objects which react to the pinch gesture. For example, use the pinch input manipulator to zoom in or zoom out a map using the pinch gesture.

See also: ClickManipulator, DragAndDropManipulator, LongPressManipulator, MultiClickManipulator, PanManipulator

Examples:

To receive the pinch update events, add message handler for the MovedMessage message.

First create a handler method:

    void onPinchMoved(PinchManipulator::MovedMessageArguments& /*messageArguments*/)
    {
        // Insert your code to handle the pinch moved event here
    }

Then add a message handler for your node:

        PinchManipulatorSharedPtr pinchManipulator = PinchManipulator::create(domain);
        node->addInputManipulator(pinchManipulator);
        movedMessageSubscription = node->addMessageHandler(PinchManipulator::MovedMessage, bind(&InputManipulatorSnippet::onPinchMoved, this, placeholders::_1));

Constructor & Destructor Documentation

kanzi::PinchManipulator::PinchManipulator ( Domain * domain )

explicitprotected

Constructor.

Member Function Documentation

static PropertyTypeEditorInfoSharedPtr kanzi::PinchManipulator::makeEditorInfo ( )

static

static PinchManipulatorSharedPtr kanzi::PinchManipulator::create	(	Domain *	domain,
		string_view	= `""`
	)

inlinestatic

void kanzi::PinchManipulator::setScaleRecognitionThreshold ( float threshold )

Set the threshold the fingers have to move away from each other before scale is recognized. The default value is 5 screen units.

void kanzi::PinchManipulator::setRotationRecognitionThreshold ( float threshold )

Set the threshold the fingers have to rotate around the midpoint before rotation is recognized. The default value is 5 screen units along the circle.

virtual void kanzi::PinchManipulator::notifyTouchInside ( const TouchInfo & touchInfo )

protectedvirtual

Touch inside implementation for pinch manipulator.

Reimplemented from kanzi::InputManipulator.

virtual void kanzi::PinchManipulator::notifyTouchOutside ( const TouchInfo & touchInfo )

protectedvirtual

Touch outside implementation for pinch manipulator.

Reimplemented from kanzi::InputManipulator.

virtual void kanzi::PinchManipulator::onReset ( )

protectedvirtual

Reset implementation for pinch input manipulator.

Reimplemented from kanzi::InputManipulator.

void kanzi::PinchManipulator::trackPinch ( const TouchInfo & touchInfo )

protected

Update the state of the pinch gesture with the new touch event.

Member Data Documentation

MessageType<StartedMessageArguments> kanzi::PinchManipulator::StartedMessage

static

Message type for notifying start of the pinch gesture.

StartedMessage is generated when touch is pressed or arrives to the attached node area.

MessageType<MovedMessageArguments> kanzi::PinchManipulator::MovedMessage

static

Message type for notifying scale and rotation updates during pinch gesture.

MovedMessage is sent first when the scale or rotation threshold is exceeded and after that when the tracked touches have moved between updates.

MessageType<FinishedMessageArguments> kanzi::PinchManipulator::FinishedMessage

static

Message type for notifying completion of the pinch gesture.

FinishedMessage is sent when the tracked touches are released or the gesture is canceled.

float kanzi::PinchManipulator::m_scaleThreshold

Scale threshold.

float kanzi::PinchManipulator::m_rotateThreshold

Rotate threshold.

unsigned int kanzi::PinchManipulator::m_touchIdA

First touch ID.

unsigned int kanzi::PinchManipulator::m_touchIdB

Second touch ID.

bool kanzi::PinchManipulator::m_scaling

Is scaling.

bool kanzi::PinchManipulator::m_rotating

Is rotating.

Vector2 kanzi::PinchManipulator::m_normalizedReferenceVector

Reference direction vector for the difference between the touch points.

float kanzi::PinchManipulator::m_referenceScale

Reference scale of the difference between the touch points.

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

kanzi/core.ui/input/pinch_manipulator.hpp

Classes

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Protected Member Functions

Additional Inherited Members

Detailed Description

Examples:

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation