The InputMethodListener defines the communication interface of Kanzi input methods. More...

#include <kanzi/core.ui/input_method/input_method_listener.hpp>

Inheritance diagram for kanzi::InputMethodListener:

Public Member Functions
void	cancelTextComposition ()
	Tells the input method, which provides the text composition, to cancel the text composition.

void	commitCompositionText ()
	Commits the composition text.

bool	isComposingText () const
	Returns the text composition state of the input method listener.

bool	isInputMethodAvailable (InputMethod &source) const
	Returns whether the input method is available.

void	onCompositionTextCommitted (InputMethod &source)
	The input method source tells the input method listener to add the composition text received by previous calls of onCompositionTextUpdated() into the cached text.

void	onCompositionTextUpdated (InputMethod &source, string_view text)
	The input method source tells the input method listener to update the composition text.

void	onCursorMoved (InputMethod &source, size_t position)
	The input method source tells the input method listener to update the cursor position.

void	onExecuteInputMethodAction (InputMethod &source)
	The input method source tells the input method listener to execute the input method action.

void	onInputMethodAvailable (InputMethod &source, bool available)
	The input method source informs its active input method listener about the available state.

bool	onInputMethodDisconnected (InputMethod &source)
	The input method source tells its active input method listener that it disconnected itself from the input method listener.

void	onInputTypeChanged (InputMethod &source, InputType inputType)
	The input method source tells the input method listener to update its input type.

void	onSelectionChanged (InputMethod &source, size_t start, size_t end)
	The input method source tells the input method listener to update the cursor positions at the start and end of the text selection.

void	onTextAdded (InputMethod &source, size_t position, string_view text)
	The input method source tells the input method listener to add a text to its cached text.

void	onTextChanged (InputMethod &source, string_view text)
	The input method source tells the input method listener to replace its cached text with the content passed in the text argument.

void	onTextCompositionCanceled (InputMethod &source)
	The input method source tells the input method listener to cancel the text composition, and remove the composition text from the content.

void	onTextCompositionStarted (InputMethod &source)
	The input method source tells the input method listener to enter the text composition state at the current cursor position.

void	onTextDeleted (InputMethod &source, size_t start, size_t end)
	The input method source tells the input method listener to remove the text between the start and end positions.

virtual	~InputMethodListener ()
	Destructor.

Input status methods
These methods provide the status of the input to the input methods to which the InputMethodListener is connected.
const TextEditBuffer &	getText () const
	Returns the text buffer that holds edited UTF-8 content.

InputType	getInputType () const
	Returns the input type used by the text input methods.

InputMethodAction	getInputMethodAction () const
	Returns the input method action of the text input methods.

bool	isReadOnly () const
	Returns whether the text of the TextEditBuffer of an InputMethodListener is unaffected by user input.

Protected Member Functions
void	connectInputMethods (Node &attachedNode)
	Connects the input methods to this listener.

void	disconnectInputMethods ()
	Disconnects the input methods from this listener.

	InputMethodListener (Domain *domain)
	Constructor.

bool	isComposingText (InputMethod &inputMethod) const
	Checks whether the inputMethod is in the text composition state.

template<typename Method , typename... Arguments>
void	updateInputMethods (InputMethod *excludeInputMethod, Method method, const Arguments &... arguments)
	Calls a method of each input method with the arguments passed.

Overridable operations
virtual void	onInputMethodAvailableOverride (InputMethod &source, bool available)=0
	To receive a notification about the availability of an input method source, override this method.

virtual bool	onInputMethodDisconnectedOverride (InputMethod &source)=0
	To deactivate an input method listener, implement this method.

virtual bool	onTextAddedOverride (InputMethod &source, size_t position, string_view text)=0
	To add text at a given position in the cached text, implement this method.

virtual bool	onTextChangedOverride (InputMethod &source, string_view text)=0
	To replace the cached text with the text passed as argument, implement this method.

virtual bool	onTextDeletedOverride (InputMethod &source, size_t start, size_t end)=0
	To delete the characters between the start and the end positions from the cached text, implement this method.

virtual bool	onTextCompositionStartedOverride (InputMethod &source)=0
	To make the input method listener enter the text composition state, implement this method.

virtual bool	onCompositionTextUpdatedOverride (InputMethod &source, string_view text)=0
	To update the composition text, implement this method.

virtual bool	onCompositionTextCommittedOverride (InputMethod &source)=0
	To commit the composition text to the cached text, implement this method.

virtual void	onTextCompositionCanceledOverride (InputMethod &source)=0
	To cancel text composition, implement this method.

virtual bool	onCursorMovedOverride (InputMethod &source, size_t position)=0
	To update the cursor position, implement this method.

virtual bool	onSelectionChangedOverride (InputMethod &source, size_t start, size_t end)=0
	To update the text selection, implement this method.

virtual void	onInputTypeChangedOverride (InputMethod &source, InputType inputType)=0
	To update the input type, implement this method.

virtual void	onExecuteInputMethodActionOverride (InputMethod &source)=0
	To execute the input action, implement this method.

Protected Attributes
InputMethodWeakPtr	m_composingInputMethod
	The input method that provides the text composition.

TextEditBuffer	m_editBuffer
	The buffer where the text input is stored.

InputMethodAction	m_inputMethodAction
	The label of the input action.

vector< pair< InputMethodSharedPtr, bool > >	m_inputMethods
	The input method instances with which the input method listener interacts.

InputType	m_inputType
	The input type.

bool	m_isReadOnly
	The read-only state.

Detailed Description

The InputMethodListener defines the communication interface of Kanzi input methods.

Input methods use this interface to update the active client about the changes occurring on the input method. The input method listener implementation must use the InputMethod interface to initiate updates, and to notify the input methods about changes that occur on the client side.

Since: Kanzi 3.9.0

Constructor & Destructor Documentation

◆ ~InputMethodListener()

virtual kanzi::InputMethodListener::~InputMethodListener ( )

virtual

Destructor.

◆ InputMethodListener()

kanzi::InputMethodListener::InputMethodListener ( Domain * domain )

explicitprotected

Constructor.

Member Function Documentation

◆ onInputMethodAvailable()

void kanzi::InputMethodListener::onInputMethodAvailable	(	InputMethod &	source,
		bool	available )

The input method source informs its active input method listener about the available state.

The input method stays connected also when it is temporarily unavailable.

Parameters

source	The input method source that informs its active input method listener about the available state.
available	The available state of the input method.

◆ isInputMethodAvailable()

bool kanzi::InputMethodListener::isInputMethodAvailable ( InputMethod & source ) const

Returns whether the input method is available.

For example, returns whether an on-screen keyboard is visible.

Parameters

source The input method source availability to check.

Returns: If the input method is connected to this input method listener, and it is available, returns true, otherwise returns false.

◆ onInputMethodDisconnected()

bool kanzi::InputMethodListener::onInputMethodDisconnected ( InputMethod & source )

The input method source tells its active input method listener that it disconnected itself from the input method listener.

Parameters

source The input method source that tells its active input method listener that it disconnected.

Returns: If the input method source successfully notifies its active input method listener that it disconnected, returns true, otherwise false.

◆ onTextChanged()

void kanzi::InputMethodListener::onTextChanged	(	InputMethod &	source,
		string_view	text )

The input method source tells the input method listener to replace its cached text with the content passed in the text argument.

Parameters

source	The input method source that tells the input method listener to replace the cached text.
text	The new text to set.

◆ onTextAdded()

void kanzi::InputMethodListener::onTextAdded	(	InputMethod &	source,
		size_t	position,
		string_view	text )

The input method source tells the input method listener to add a text to its cached text.

Parameters

source	The input method source that tells the input method listener to add a text to the cached text.
position	The position where the text is added.
text	The text to append to the cached text.

◆ onTextDeleted()

void kanzi::InputMethodListener::onTextDeleted	(	InputMethod &	source,
		size_t	start,
		size_t	end )

The input method source tells the input method listener to remove the text between the start and end positions.

Parameters

source	The input method source that tells the input method listener to remove the text.
start	The start position of the text to remove.
end	The end position of the text to remove.

◆ isComposingText() [1/2]

bool kanzi::InputMethodListener::isComposingText ( ) const

Returns the text composition state of the input method listener.

Returns: If the input method listener has an input method backend which is in the text composition state, true, otherwise false.

◆ onTextCompositionStarted()

void kanzi::InputMethodListener::onTextCompositionStarted ( InputMethod & source )

The input method source tells the input method listener to enter the text composition state at the current cursor position.

Parameters

source The input method source that tells the input method listener to prepare for receiving composition text.

◆ onCompositionTextUpdated()

void kanzi::InputMethodListener::onCompositionTextUpdated	(	InputMethod &	source,
		string_view	text )

The input method source tells the input method listener to update the composition text.

Parameters

source	The input method source that tells the input method listener to update the composition text.
text	The text to insert into the cached text.

◆ onCompositionTextCommitted()

void kanzi::InputMethodListener::onCompositionTextCommitted ( InputMethod & source )

The input method source tells the input method listener to add the composition text received by previous calls of onCompositionTextUpdated() into the cached text.

Parameters

source The input method source that tells the input method listener to commit the composition text.

◆ onTextCompositionCanceled()

void kanzi::InputMethodListener::onTextCompositionCanceled ( InputMethod & source )

The input method source tells the input method listener to cancel the text composition, and remove the composition text from the content.

Parameters

source The input method source that tells the input method listener to cancel the text composition.

◆ onCursorMoved()

void kanzi::InputMethodListener::onCursorMoved	(	InputMethod &	source,
		size_t	position )

The input method source tells the input method listener to update the cursor position.

Parameters

source	The input method source that tells the input method listener to update the cursor position.
position	The position of the cursor to set.

◆ onSelectionChanged()

void kanzi::InputMethodListener::onSelectionChanged	(	InputMethod &	source,
		size_t	start,
		size_t	end )

The input method source tells the input method listener to update the cursor positions at the start and end of the text selection.

Parameters

source	The input method that tells the input method listener to update the cursor positions.
start	The cursor position at the start of the text selection to set.
end	The cursor position at the end of the text selection to set.

◆ onInputTypeChanged()

void kanzi::InputMethodListener::onInputTypeChanged	(	InputMethod &	source,
		InputType	inputType )

The input method source tells the input method listener to update its input type.

Parameters

source	The input method source that tells the input method listener to update its input type.
inputType	The input type to set.

◆ onExecuteInputMethodAction()

void kanzi::InputMethodListener::onExecuteInputMethodAction ( InputMethod & source )

The input method source tells the input method listener to execute the input method action.

Parameters

source The input method source that tells the input method listener to execute the input method action.

◆ cancelTextComposition()

void kanzi::InputMethodListener::cancelTextComposition ( )

Tells the input method, which provides the text composition, to cancel the text composition.

◆ commitCompositionText()

void kanzi::InputMethodListener::commitCompositionText ( )

Commits the composition text.

◆ getText()

const TextEditBuffer & kanzi::InputMethodListener::getText ( ) const

Returns the text buffer that holds edited UTF-8 content.

Returns: The address of the text buffer.

◆ getInputType()

InputType kanzi::InputMethodListener::getInputType ( ) const

Returns the input type used by the text input methods.

Returns: The input type used by the text input methods.

◆ getInputMethodAction()

InputMethodAction kanzi::InputMethodListener::getInputMethodAction ( ) const

Returns the input method action of the text input methods.

Returns: The input method action of the text input methods.

◆ isReadOnly()

bool kanzi::InputMethodListener::isReadOnly ( ) const

Returns whether the text of the TextEditBuffer of an InputMethodListener is unaffected by user input.

Returns: If the user input does not affect the text of the TextEditBuffer of an InputMethodListener, returns true, otherwise false. Moving the cursor and selecting text is possible also when text editing is disabled.

See also: TextInputManipulator::setReadOnly(), TextInputManipulator::ReadOnlyStateChangedMessage

◆ connectInputMethods()

void kanzi::InputMethodListener::connectInputMethods ( Node & attachedNode )

protected

Connects the input methods to this listener.

◆ disconnectInputMethods()

void kanzi::InputMethodListener::disconnectInputMethods ( )

protected

Disconnects the input methods from this listener.

◆ isComposingText() [2/2]

bool kanzi::InputMethodListener::isComposingText ( InputMethod & inputMethod ) const

protected

Checks whether the inputMethod is in the text composition state.

◆ onInputMethodAvailableOverride()

virtual void kanzi::InputMethodListener::onInputMethodAvailableOverride	(	InputMethod &	source,
		bool	available )

protectedpure virtual

To receive a notification about the availability of an input method source, override this method.

Parameters

source	The input method source whose available state changed.
available	The available state of the input method.

Implemented in kanzi::TextInputManipulator.

◆ onInputMethodDisconnectedOverride()

virtual bool kanzi::InputMethodListener::onInputMethodDisconnectedOverride ( InputMethod & source )

protectedpure virtual

To deactivate an input method listener, implement this method.

Parameters

source The input method source that tells the input method listener to deactivate.

Returns: If the input method listener successfully deactivates, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onTextAddedOverride()

virtual bool kanzi::InputMethodListener::onTextAddedOverride	(	InputMethod &	source,
		size_t	position,
		string_view	text )

protectedpure virtual

To add text at a given position in the cached text, implement this method.

This method is called by the InputMethodListener::onTextAdded() method.

Parameters

source	The input method source that tells the input method listener to add a text to the cached text.
position	The position where to add the text.
text	The text to append to the cached text. Kanzi expects the input method listener to move the cursor to the end of the text added to the cached text.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onTextChangedOverride()

virtual bool kanzi::InputMethodListener::onTextChangedOverride	(	InputMethod &	source,
		string_view	text )

protectedpure virtual

To replace the cached text with the text passed as argument, implement this method.

This method is called by the InputMethodListener::onTextChanged() method.

Parameters

source	The input method source that tells the input method listener to replace the cached text.
text	The text to set.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onTextDeletedOverride()

virtual bool kanzi::InputMethodListener::onTextDeletedOverride	(	InputMethod &	source,
		size_t	start,
		size_t	end )

protectedpure virtual

To delete the characters between the start and the end positions from the cached text, implement this method.

This method is called by the InputMethodListener::onTextDeleted() method.

Parameters

source	The input method source that tells the input method listener to remove the text.
start	The start position of the text to remove.
end	The end position of the text to remove.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onTextCompositionStartedOverride()

virtual bool kanzi::InputMethodListener::onTextCompositionStartedOverride ( InputMethod & source )

protectedpure virtual

To make the input method listener enter the text composition state, implement this method.

This method is called by the InputMethodListener::onTextCompositionStarted() method.

Parameters

source The input method source that tells the input method listener to enter the text composition state.

Returns: If the input method listener enters the text composition state, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onCompositionTextUpdatedOverride()

virtual bool kanzi::InputMethodListener::onCompositionTextUpdatedOverride	(	InputMethod &	source,
		string_view	text )

protectedpure virtual

To update the composition text, implement this method.

This method is called by the InputMethodListener::onCompositionTextUpdated() method.

Parameters

source	The input method source that tells the input method listener to update the composition text.
text	The text to insert into the cached text.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onCompositionTextCommittedOverride()

virtual bool kanzi::InputMethodListener::onCompositionTextCommittedOverride ( InputMethod & source )

protectedpure virtual

To commit the composition text to the cached text, implement this method.

This method is called by the InputMethodListener::onCompositionTextCommitted() method.

Parameters

source The input method source that tells the input method listener to commit the composition text.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onTextCompositionCanceledOverride()

virtual void kanzi::InputMethodListener::onTextCompositionCanceledOverride ( InputMethod & source )

protectedpure virtual

To cancel text composition, implement this method.

This method is called by the InputMethodListener::onTextCompositionCanceled() method.

Parameters

source The input method source that tells the input method listener to cancel text composition.

Implemented in kanzi::TextInputManipulator.

◆ onCursorMovedOverride()

virtual bool kanzi::InputMethodListener::onCursorMovedOverride	(	InputMethod &	source,
		size_t	position )

protectedpure virtual

To update the cursor position, implement this method.

This method is called by the InputMethodListener::onCursorMoved() method.

Parameters

source	The input method source that tells the input method listener to update the cursor position.
position	The position of the cursor to set.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onSelectionChangedOverride()

virtual bool kanzi::InputMethodListener::onSelectionChangedOverride	(	InputMethod &	source,
		size_t	start,
		size_t	end )

protectedpure virtual

To update the text selection, implement this method.

This method is called by the InputMethodListener::onSelectionChanged() method.

Parameters

source	The input method that tells the input method listener to update the cursor positions.
start	The cursor position at the start of the text selection to set.
end	The cursor position at the end of the text selection to set.

Returns: If the operation succeeds, returns true, otherwise false.

Implemented in kanzi::TextInputManipulator.

◆ onInputTypeChangedOverride()

virtual void kanzi::InputMethodListener::onInputTypeChangedOverride	(	InputMethod &	source,
		InputType	inputType )

protectedpure virtual

To update the input type, implement this method.

This method is called by the InputMethodListener::onInputTypeChanged() method.

Parameters

source	The input method that tells the input method listener to update the input type.
inputType	The input type to set.

Implemented in kanzi::TextInputManipulator.

◆ onExecuteInputMethodActionOverride()

virtual void kanzi::InputMethodListener::onExecuteInputMethodActionOverride ( InputMethod & source )

protectedpure virtual

To execute the input action, implement this method.

This method is called by the InputMethodListener::onExecuteInputMethodAction() method.

Parameters

source The input method that tells the input method listener to execute the input action.

Implemented in kanzi::TextInputManipulator.

◆ updateInputMethods()

template<typename Method , typename... Arguments>

void kanzi::InputMethodListener::updateInputMethods	(	InputMethod *	excludeInputMethod,
		Method	method,
		const Arguments &...	arguments )

inlineprotected

Calls a method of each input method with the arguments passed.

Template Parameters

Method	The method type.
Arguments	The argument types.

Parameters

excludeInputMethod	The input method to exclude. The method is not called on this input method.
method	The address of the method to call.
arguments	The arguments to pass to the method.

Member Data Documentation

◆ m_inputMethods

vector<pair<InputMethodSharedPtr, bool> > kanzi::InputMethodListener::m_inputMethods

protected

The input method instances with which the input method listener interacts.

◆ m_composingInputMethod

InputMethodWeakPtr kanzi::InputMethodListener::m_composingInputMethod

protected

The input method that provides the text composition.

◆ m_editBuffer

TextEditBuffer kanzi::InputMethodListener::m_editBuffer

protected

The buffer where the text input is stored.

◆ m_inputMethodAction

InputMethodAction kanzi::InputMethodListener::m_inputMethodAction

protected

The label of the input action.

◆ m_inputType

InputType kanzi::InputMethodListener::m_inputType

protected

The input type.

◆ m_isReadOnly

bool kanzi::InputMethodListener::m_isReadOnly

protected

The read-only state.

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

kanzi/core.ui/input_method/input_method_listener.hpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ~InputMethodListener()

◆ InputMethodListener()

Member Function Documentation

◆ onInputMethodAvailable()

◆ isInputMethodAvailable()

◆ onInputMethodDisconnected()

◆ onTextChanged()

◆ onTextAdded()

◆ onTextDeleted()

◆ isComposingText() [1/2]

◆ onTextCompositionStarted()

◆ onCompositionTextUpdated()

◆ onCompositionTextCommitted()

◆ onTextCompositionCanceled()

◆ onCursorMoved()

◆ onSelectionChanged()

◆ onInputTypeChanged()

◆ onExecuteInputMethodAction()

◆ cancelTextComposition()

◆ commitCompositionText()

◆ getText()

◆ getInputType()

◆ getInputMethodAction()

◆ isReadOnly()

◆ connectInputMethods()

◆ disconnectInputMethods()

◆ isComposingText() [2/2]

◆ onInputMethodAvailableOverride()

◆ onInputMethodDisconnectedOverride()

◆ onTextAddedOverride()

◆ onTextChangedOverride()

◆ onTextDeletedOverride()

◆ onTextCompositionStartedOverride()

◆ onCompositionTextUpdatedOverride()

◆ onCompositionTextCommittedOverride()

◆ onTextCompositionCanceledOverride()

◆ onCursorMovedOverride()

◆ onSelectionChangedOverride()

◆ onInputTypeChangedOverride()

◆ onExecuteInputMethodActionOverride()

◆ updateInputMethods()

Member Data Documentation

◆ m_inputMethods

◆ m_composingInputMethod

◆ m_editBuffer

◆ m_inputMethodAction

◆ m_inputType

◆ m_isReadOnly