Package com.vaadin.flow.component

Interface KeyNotifier

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbstractNumberField, BigDecimalField, EmailField, IntegerField, NumberField, PasswordField, RichTextEditor, TextArea, TextField

public interface KeyNotifier
extends Serializable

Mixin interface for components that support adding key event listeners to the their root elements.

Since:

1.0

Author:

Vaadin Ltd

Method Summary

Modifier and Type	Method	Description
default Registration	addKeyDownListener(ComponentEventListener<KeyDownEvent> listener)	Adds a keydown listener to this component.
default Registration	addKeyDownListener(Key key, ComponentEventListener<KeyDownEvent> listener, KeyModifier... modifiers)	Adds a keydown listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.
default Registration	addKeyPressListener(ComponentEventListener<KeyPressEvent> listener)	Adds a keypress listener to this component.
default Registration	addKeyPressListener(Key key, ComponentEventListener<KeyPressEvent> listener, KeyModifier... modifiers)	Adds a keypress listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.
default Registration	addKeyUpListener(ComponentEventListener<KeyUpEvent> listener)	Adds a keyup listener to this component.
default Registration	addKeyUpListener(Key key, ComponentEventListener<KeyUpEvent> listener, KeyModifier... modifiers)	Adds a keyup listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.

Method Detail

addKeyDownListener

default Registration addKeyDownListener(ComponentEventListener<KeyDownEvent> listener)

Adds a keydown listener to this component.

Parameters:

listener - the listener to add, not null

Returns:

a handle that can be used for removing the listener

addKeyPressListener

default Registration addKeyPressListener(ComponentEventListener<KeyPressEvent> listener)

Adds a keypress listener to this component.

Parameters:

listener - the listener to add, not null

Returns:

a handle that can be used for removing the listener

addKeyUpListener

default Registration addKeyUpListener(ComponentEventListener<KeyUpEvent> listener)

Adds a keyup listener to this component.

Parameters:

listener - the listener to add, not null

Returns:

a handle that can be used for removing the listener

addKeyDownListener

default Registration addKeyDownListener(Key key,
                                        ComponentEventListener<KeyDownEvent> listener,
                                        KeyModifier... modifiers)

Adds a keydown listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.

See Key for common static instances or use Key.of(String, String...) to get an instance from an arbitrary value.

Parameters:

key - the key to match

listener - the listener to add, not null

modifiers - the optional modifiers to match

Returns:

a handle that can be used for removing the listener

addKeyPressListener

default Registration addKeyPressListener(Key key,
                                         ComponentEventListener<KeyPressEvent> listener,
                                         KeyModifier... modifiers)

Adds a keypress listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.

See Key for common static instances or use Key.of(String, String...) to get an instance from an arbitrary value.

Parameters:

key - the key to match

listener - the listener to add, not null

modifiers - the optional modifiers to match

Returns:

a handle that can be used for removing the listener

addKeyUpListener

default Registration addKeyUpListener(Key key,
                                      ComponentEventListener<KeyUpEvent> listener,
                                      KeyModifier... modifiers)

Adds a keyup listener to this component, which will trigger only if the keys involved in the event match the key and modifiers parameters.

See Key for common static instances or use Key.of(String, String...) to get an instance from an arbitrary value.

Parameters:

key - the key to match

listener - the listener to add, not null

modifiers - the optional modifiers to match

Returns:

a handle that can be used for removing the listener