Package com.google.gwt.user.client.ui

Interface HasKeyPreview

@Deprecated
public interface HasKeyPreview

Deprecated.

This interface is no longer implemented by any GWT library. Use Event.addNativePreviewHandler(com.google.gwt.user.client.Event.NativePreviewHandler) instead.

A class that implements this interface receives a preview of keyboard events before they are passed to the focused widget.

See Also:

• KeyCodeEvent

Method Summary

Modifier and Type	Method	Description
boolean	onKeyDownPreview(char key, int modifiers)	Deprecated. Called when a key-down event is received.
boolean	onKeyPressPreview(char key, int modifiers)	Deprecated. Called when a key-press event is received.
boolean	onKeyUpPreview(char key, int modifiers)	Deprecated. Called when a key-up event is received.

Method Details

onKeyDownPreview

boolean onKeyDownPreview(char key,
 int modifiers)

Deprecated.

Called when a key-down event is received.

Parameters:

key - the physical key that was depressed. Constants for this value are defined in this interface with the KEYCODE prefix.

modifiers - the modifier keys pressed at when the event occurred. This value is a combination of the bits defined by KeyboardListener.MODIFIER_SHIFT, KeyboardListener.MODIFIER_CTRL, and KeyboardListener.MODIFIER_ALT.

onKeyPressPreview

boolean onKeyPressPreview(char key,
 int modifiers)

Deprecated.

Called when a key-press event is received.

Parameters:

key - the Unicode character that was generated by the keyboard action.

modifiers - the modifier keys pressed at when the event occurred. This value is a combination of the bits defined by KeyboardListener.MODIFIER_SHIFT, KeyboardListener.MODIFIER_CTRL, and KeyboardListener.MODIFIER_ALT.

onKeyUpPreview

boolean onKeyUpPreview(char key,
 int modifiers)

Deprecated.

Called when a key-up event is received.

Parameters:

key - the physical key that was released. Constants for this value are defined in this interface with the KEYCODE prefix.

modifiers - the modifier keys pressed at when the event occurred. This value is a combination of the bits defined by KeyboardListener.MODIFIER_SHIFT, KeyboardListener.MODIFIER_CTRL, and KeyboardListener.MODIFIER_ALT.