AutoDirectionHandler (Google Web Toolkit Javadoc)

java.lang.Object
- com.google.gwt.i18n.client.AutoDirectionHandler

All Implemented Interfaces:

KeyUpHandler, EventHandler, HasDirectionEstimator
```
public class AutoDirectionHandler
extends java.lang.Object
implements KeyUpHandler, HasDirectionEstimator
```
Utility class for handling auto-direction adjustment. This class is useful for automatically adjusting the direction of an object that takes text input, while the text is being entered.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static interface AutoDirectionHandler.Target
The interface an object must implement in order to add an AutoDirectionHandler to it.

Nested Classes
Modifier and Type	Class and Description
`static interface`	`AutoDirectionHandler.Target` The interface an object must implement in order to add an AutoDirectionHandler to it.

Method Summary

Methods
Modifier and Type	Method and Description
`static AutoDirectionHandler`	`addTo(AutoDirectionHandler.Target target)` Operates like `addTo(Target, DirectionEstimator)`, but always uses a default DirectionEstimator, `WordCountDirectionEstimator`.
`static AutoDirectionHandler`	`addTo(AutoDirectionHandler.Target target, boolean enabled)` Operates like `addTo(Target, DirectionEstimator)`, but uses a default DirectionEstimator, `WordCountDirectionEstimator` if `enabled`, or else a null DirectionEstimator, which means disabling direction estimation.
`static AutoDirectionHandler`	`addTo(AutoDirectionHandler.Target target, DirectionEstimator directionEstimator)` Adds auto-direction adjustment to a given object: - Creates an AutoDirectionHandler.
`DirectionEstimator`	`getDirectionEstimator()` Returns the DirectionEstimator object.
`void`	`onKeyUp(KeyUpEvent event)` Automatically adjusts hasDirection's direction on KeyUpEvent events.
`void`	`refreshDirection()` Adjusts target's direction according to the estimated direction of the text it supplies.
`void`	`setDirectionEstimator(boolean enabled)` Toggles direction estimation on (using a default estimator) and off.
`void`	`setDirectionEstimator(DirectionEstimator directionEstimator)` Sets the DirectionEstimator object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - addTo
```
public static AutoDirectionHandler addTo(AutoDirectionHandler.Target target)
```
    Operates like addTo(Target, DirectionEstimator), but always uses a default DirectionEstimator, WordCountDirectionEstimator.
    
    Parameters:
    target - Object whose direction should be automatically adjusted on relevant events.
    
    Returns:
    AutoDirectionHandler An instance of AutoDirectionHandler for the given object.
  - addTo
```
public static AutoDirectionHandler addTo(AutoDirectionHandler.Target target,
                         boolean enabled)
```
    Operates like addTo(Target, DirectionEstimator), but uses a default DirectionEstimator, WordCountDirectionEstimator if enabled, or else a null DirectionEstimator, which means disabling direction estimation.
    
    Parameters:
    target - Object whose direction should be automatically adjusted on relevant events.
    enabled - Whether the handler is enabled upon creation.
    
    Returns:
    AutoDirectionHandler An instance of AutoDirectionHandler for the given object.
  - addTo
```
public static AutoDirectionHandler addTo(AutoDirectionHandler.Target target,
                         DirectionEstimator directionEstimator)
```
    Adds auto-direction adjustment to a given object: - Creates an AutoDirectionHandler. - Initializes it with the given DirectionEstimator. - Adds it as an event handler for the relevant events on the given object. - Returns the AutoDirectionHandler, so its setAutoDir() method can be called when the object's text changes by means other than the handled events.
    
    Parameters:
    target - Object whose direction should be automatically adjusted on relevant events.
    directionEstimator - A DirectionEstimator object used for direction estimation (use null to disable direction estimation).
    
    Returns:
    AutoDirectionHandler An instance of AutoDirectionHandler for the given object.
  - getDirectionEstimator
```
public DirectionEstimator getDirectionEstimator()
```
    Returns the DirectionEstimator object.
    
    Specified by:
    
    getDirectionEstimator in interface HasDirectionEstimator
  - onKeyUp
```
public void onKeyUp(KeyUpEvent event)
```
    Automatically adjusts hasDirection's direction on KeyUpEvent events. Implementation of KeyUpHandler interface method.
    
    Specified by:
    
    onKeyUp in interface KeyUpHandler
    
    Parameters:
    event - the KeyUpEvent that was fired
  - refreshDirection
```
public void refreshDirection()
```
    Adjusts target's direction according to the estimated direction of the text it supplies.
  - setDirectionEstimator
```
public void setDirectionEstimator(boolean enabled)
```
    Toggles direction estimation on (using a default estimator) and off.
    
    Specified by:
    
    setDirectionEstimator in interface HasDirectionEstimator
    
    Parameters:
    enabled - Whether to enable direction estimation. If true, sets the DirectionEstimator object to a default DirectionEstimator.
  - setDirectionEstimator
```
public void setDirectionEstimator(DirectionEstimator directionEstimator)
```
    Sets the DirectionEstimator object.
    
    Specified by:
    
    setDirectionEstimator in interface HasDirectionEstimator
    
    Parameters:
    directionEstimator - The DirectionEstimator to be set. null means turning off direction estimation.

Class AutoDirectionHandler

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

addTo

addTo

addTo

getDirectionEstimator

onKeyUp

refreshDirection

setDirectionEstimator

setDirectionEstimator