com.google.gwt.user.client.ui

## Class KeyboardListenerAdapter

- java.lang.Object
- - com.google.gwt.user.client.ui.KeyboardListenerAdapter

- All Implemented Interfaces:
    KeyboardListener, java.util.EventListener

  Deprecated.
  use `KeyDownHandler`, `KeyUpHandler` and/or `KeyPressHandler` instead

      @Deprecated
      public class KeyboardListenerAdapter
      extends java.lang.Object
      implements KeyboardListener

  An adapter to simplify keyboard event listeners that do not need all events defined on the KeyboardListener interface.

- - ### Field Summary

    - ### Fields inherited from interface com.google.gwt.user.client.ui.KeyboardListener

      `KEY_ALT, KEY_BACKSPACE, KEY_CTRL, KEY_DELETE, KEY_DOWN, KEY_END, KEY_ENTER, KEY_ESCAPE, KEY_HOME, KEY_LEFT, KEY_PAGEDOWN, KEY_PAGEUP, KEY_RIGHT, KEY_SHIFT, KEY_TAB, KEY_UP, MODIFIER_ALT, MODIFIER_CTRL, MODIFIER_META, MODIFIER_SHIFT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `KeyboardListenerAdapter()` Deprecated.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `onKeyDown(Widget sender, char keyCode, int modifiers)` Deprecated. Fired when the user depresses a physical key.
    `void` | `onKeyPress(Widget sender, char keyCode, int modifiers)` Deprecated. Fired when a keyboard action generates a character.
    `void` | `onKeyUp(Widget sender, char keyCode, int modifiers)` Deprecated. Fired when the user releases a physical key.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### KeyboardListenerAdapter

          public KeyboardListenerAdapter()

      Deprecated.

  - ### Method Detail

    - #### onKeyDown

          public void onKeyDown(Widget sender,
                       char keyCode,
                       int modifiers)

      Deprecated.
      Description copied from interface: `KeyboardListener`
      Fired when the user depresses a physical key.
      Specified by:
        `onKeyDown` in interface `KeyboardListener`
      Parameters:
        `sender` - the widget that was focused when the event occurred.
        `keyCode` - the physical key that was depressed. Constants for this value are defined in this interface with the KEY 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`

    - #### onKeyPress

          public void onKeyPress(Widget sender,
                        char keyCode,
                        int modifiers)

      Deprecated.
      Description copied from interface: `KeyboardListener`
      Fired when a keyboard action generates a character. This occurs after onKeyDown and onKeyUp are fired for the physical key that was pressed.

      It should be noted that many browsers do not generate keypress events for non-printing keyCode values, such as `KeyboardListener.KEY_ENTER` or arrow keys. These keyCodes can be reliably captured either with `KeyboardListener.onKeyDown(Widget, char, int)` or `KeyboardListener.onKeyUp(Widget, char, int)`.

      Specified by:
        `onKeyPress` in interface `KeyboardListener`
      Parameters:
        `sender` - the widget that was focused when the event occurred.
        `keyCode` - 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`

    - #### onKeyUp

          public void onKeyUp(Widget sender,
                     char keyCode,
                     int modifiers)

      Deprecated.
      Description copied from interface: `KeyboardListener`
      Fired when the user releases a physical key.
      Specified by:
        `onKeyUp` in interface `KeyboardListener`
      Parameters:
        `sender` - the widget that was focused when the event occurred.
        `keyCode` - the physical key that was released. Constants for this value are defined in this interface with the KEY 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`