ValueBoxBase (Google Web Toolkit Javadoc)

java.lang.Object
- com.google.gwt.user.client.ui.UIObject
- - com.google.gwt.user.client.ui.Widget
  - - com.google.gwt.user.client.ui.FocusWidget
    - - com.google.gwt.user.client.ui.ValueBoxBase<T>

Type Parameters:
T - the value type

All Implemented Interfaces:

IsEditor<ValueBoxEditor<T>>, HasAllDragAndDropHandlers, HasAllFocusHandlers, HasAllGestureHandlers, HasAllKeyHandlers, HasAllMouseHandlers, HasAllTouchHandlers, HasBlurHandlers, HasChangeHandlers, HasClickHandlers, HasDoubleClickHandlers, HasDragEndHandlers, HasDragEnterHandlers, HasDragHandlers, HasDragLeaveHandlers, HasDragOverHandlers, HasDragStartHandlers, HasDropHandlers, HasFocusHandlers, HasGestureChangeHandlers, HasGestureEndHandlers, HasGestureStartHandlers, HasKeyDownHandlers, HasKeyPressHandlers, HasKeyUpHandlers, HasMouseDownHandlers, HasMouseMoveHandlers, HasMouseOutHandlers, HasMouseOverHandlers, HasMouseUpHandlers, HasMouseWheelHandlers, HasTouchCancelHandlers, HasTouchEndHandlers, HasTouchMoveHandlers, HasTouchStartHandlers, HasAttachHandlers, HasValueChangeHandlers<T>, HasHandlers, AutoDirectionHandler.Target, HasDirection, HasDirectionEstimator, EventListener, TakesValue<T>, Focusable, HasEnabled, HasFocus, HasName, HasText, HasValue<T>, HasVisibility, IsWidget, SourcesClickEvents, SourcesFocusEvents, SourcesKeyboardEvents, SourcesMouseEvents

Direct Known Subclasses:

TextBoxBase, ValueBox
```
public class ValueBoxBase<T>
extends FocusWidget
implements HasChangeHandlers, HasName, HasDirectionEstimator, HasValue<T>, AutoDirectionHandler.Target, IsEditor<ValueBoxEditor<T>>
```
Abstract base class for all text entry widgets.
Use in UiBinder Templates

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class ValueBoxBase.TextAlignment
Alignment values for setAlignment(com.google.gwt.user.client.ui.ValueBoxBase.TextAlignment).
- Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
  UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled
- Nested classes/interfaces inherited from interface com.google.gwt.i18n.client.HasDirection
  HasDirection.Direction

Nested Classes
Modifier and Type	Class and Description
`static class`	`ValueBoxBase.TextAlignment` Alignment values for `setAlignment(com.google.gwt.user.client.ui.ValueBoxBase.TextAlignment)`.

Field Summary
- Fields inherited from class com.google.gwt.user.client.ui.Widget
  eventsToSink
- Fields inherited from class com.google.gwt.user.client.ui.UIObject
  DEBUG_ID_PREFIX, MISSING_ELEMENT_ERROR, SETELEMENT_TWICE_ERROR

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`ValueBoxBase(Element elem, Renderer<T> renderer, Parser<T> parser)` Creates a value box that wraps the given browser element handle.

Method Summary

Methods
Modifier and Type	Method and Description
`HandlerRegistration`	`addChangeHandler(ChangeHandler handler)` Adds a `ChangeEvent` handler.
`HandlerRegistration`	`addValueChangeHandler(ValueChangeHandler<T> handler)` Adds a `ValueChangeEvent` handler.
`ValueBoxEditor<T>`	`asEditor()` Returns an Editor that is backed by the ValueBoxBase.
`void`	`cancelKey()` If a keyboard event is currently being handled on this text box, calling this method will suppress it.
`int`	`getCursorPos()` Gets the current position of the cursor (this also serves as the beginning of the text selection).
`HasDirection.Direction`	`getDirection()` Gets the directionality of the widget.
`DirectionEstimator`	`getDirectionEstimator()` Gets the direction estimation model of the auto-dir handler.
`protected com.google.gwt.user.client.ui.impl.TextBoxImpl`	`getImpl()`
`java.lang.String`	`getName()` Gets the widget's name.
`java.lang.String`	`getSelectedText()` Gets the text currently selected within this text box.
`int`	`getSelectionLength()` Gets the length of the current text selection.
`java.lang.String`	`getText()` Gets this object's text.
`T`	`getValue()` Return the parsed value, or null if the field is empty or parsing fails.
`T`	`getValueOrThrow()` Return the parsed value, or null if the field is empty.
`boolean`	`isReadOnly()` Determines whether or not the widget is read-only.
`void`	`onBrowserEvent(Event event)` Fired whenever a browser event is received.
`protected void`	`onLoad()` This method is called immediately after a widget becomes attached to the browser's document.
`void`	`removeChangeListener(ChangeListener listener)` Deprecated. Use the `HandlerRegistration.removeHandler()` method on the object returned by `addChangeHandler(com.google.gwt.event.dom.client.ChangeHandler)` instead
`void`	`selectAll()` Selects all of the text in the box.
`void`	`setAlignment(ValueBoxBase.TextAlignment align)`
`void`	`setCursorPos(int pos)` Sets the cursor position.
`void`	`setDirection(HasDirection.Direction direction)` Sets the directionality for a widget.
`void`	`setDirectionEstimator(boolean enabled)` Toggles on / off direction estimation.
`void`	`setDirectionEstimator(DirectionEstimator directionEstimator)` Sets the direction estimation model of the auto-dir handler.
`void`	`setKey(char key)` Deprecated. this method only works in IE and should not have been added to the API
`void`	`setName(java.lang.String name)` Sets the widget's name.
`void`	`setReadOnly(boolean readOnly)` Turns read-only mode on or off.
`void`	`setSelectionRange(int pos, int length)` Sets the range of text to be selected.
`void`	`setText(java.lang.String text)` Sets this object's text.
`void`	`setValue(T value)` Sets this object's value without firing any events.
`void`	`setValue(T value, boolean fireEvents)` Sets this object's value.

Methods inherited from class com.google.gwt.user.client.ui.FocusWidget
addBlurHandler, addClickHandler, addClickListener, addDoubleClickHandler, addDragEndHandler, addDragEnterHandler, addDragHandler, addDragLeaveHandler, addDragOverHandler, addDragStartHandler, addDropHandler, addFocusHandler, addFocusListener, addGestureChangeHandler, addGestureEndHandler, addGestureStartHandler, addKeyboardListener, addKeyDownHandler, addKeyPressHandler, addKeyUpHandler, addMouseDownHandler, addMouseListener, addMouseMoveHandler, addMouseOutHandler, addMouseOverHandler, addMouseUpHandler, addMouseWheelHandler, addMouseWheelListener, addTouchCancelHandler, addTouchEndHandler, addTouchMoveHandler, addTouchStartHandler, getFocusImpl, getTabIndex, isEnabled, onAttach, removeClickListener, removeFocusListener, removeKeyboardListener, removeMouseListener, removeMouseWheelListener, setAccessKey, setEnabled, setFocus, setTabIndex

Methods inherited from class com.google.gwt.user.client.ui.Widget
addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, ensureHandlers, fireEvent, getHandlerCount, getHandlerManager, getLayoutData, getParent, isAttached, isOrWasAttached, onDetach, onUnload, removeFromParent, replaceElement, setLayoutData, setParent, sinkEvents, unsinkEvents

Methods inherited from class com.google.gwt.user.client.ui.UIObject
addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, resolvePotentialElement, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString

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

Methods inherited from interface com.google.gwt.event.dom.client.HasKeyUpHandlers
addKeyUpHandler

Methods inherited from interface com.google.gwt.event.shared.HasHandlers
fireEvent

- Constructor Detail
  - ValueBoxBase
```
protected ValueBoxBase(Element elem,
            Renderer<T> renderer,
            Parser<T> parser)
```
    Creates a value box that wraps the given browser element handle. This is only used by subclasses.
    
    Parameters:
    elem - the browser element to wrap
- Method Detail
  - addChangeHandler
```
public HandlerRegistration addChangeHandler(ChangeHandler handler)
```
    Description copied from interface: HasChangeHandlers
    
    Adds a ChangeEvent handler.
    
    Specified by:
    
    addChangeHandler in interface HasChangeHandlers
    
    Parameters:
    handler - the change handler
    
    Returns:
    HandlerRegistration used to remove this handler
  - addValueChangeHandler
```
public HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler)
```
    Description copied from interface: HasValueChangeHandlers
    
    Adds a ValueChangeEvent handler.
    
    Specified by:
    
    addValueChangeHandler in interface HasValueChangeHandlers<T>
    
    Parameters:
    handler - the handler
    
    Returns:
    the registration for the event
  - asEditor
```
public ValueBoxEditor<T> asEditor()
```
    Returns an Editor that is backed by the ValueBoxBase. The default implementation returns ValueBoxEditor.of(ValueBoxBase). Subclasses may override this method to provide custom error-handling when using the Editor framework.
    
    Specified by:
    
    asEditor in interface IsEditor<ValueBoxEditor<T>>
    
    Returns:
    an Editor of type E
  - cancelKey
```
public void cancelKey()
```
    If a keyboard event is currently being handled on this text box, calling this method will suppress it. This allows listeners to easily filter keyboard input.
  - getCursorPos
```
public int getCursorPos()
```
    Gets the current position of the cursor (this also serves as the beginning of the text selection).
    
    Returns:
    the cursor's position
  - getDirection
```
public HasDirection.Direction getDirection()
```
    Description copied from interface: HasDirection
    
    Gets the directionality of the widget.
    
    Specified by:
    
    getDirection in interface HasDirection
    
    Returns:
    RTL if the directionality is right-to-left, LTR if the directionality is left-to-right, or DEFAULT if the directionality is not explicitly specified
  - getDirectionEstimator
```
public DirectionEstimator getDirectionEstimator()
```
    Gets the direction estimation model of the auto-dir handler.
    
    Specified by:
    
    getDirectionEstimator in interface HasDirectionEstimator
  - getName
```
public java.lang.String getName()
```
    Description copied from interface: HasName
    
    Gets the widget's name.
    
    Specified by:
    
    getName in interface HasName
    
    Returns:
    the widget's name
  - getSelectedText
```
public java.lang.String getSelectedText()
```
    Gets the text currently selected within this text box.
    
    Returns:
    the selected text, or an empty string if none is selected
  - getSelectionLength
```
public int getSelectionLength()
```
    Gets the length of the current text selection.
    
    Returns:
    the text selection length
  - getText
```
public java.lang.String getText()
```
    Description copied from interface: HasText
    
    Gets this object's text.
    
    Specified by:
    
    getText in interface HasText
    
    Returns:
    the object's text
  - getValue
```
public T getValue()
```
    Return the parsed value, or null if the field is empty or parsing fails.
    
    Specified by:
    
    getValue in interface TakesValue<T>
    
    Specified by:
    
    getValue in interface HasValue<T>
    
    Returns:
    the object's value
    See Also:
    TakesValue.setValue(V)
  - getValueOrThrow
```
public T getValueOrThrow()
                  throws java.text.ParseException
```
    Return the parsed value, or null if the field is empty.
    
    Throws:
    
    java.text.ParseException - if the value cannot be parsed
  - isReadOnly
```
public boolean isReadOnly()
```
    Determines whether or not the widget is read-only.
    
    Returns:
    true if the widget is currently read-only, false if the widget is currently editable
  - onBrowserEvent
```
public void onBrowserEvent(Event event)
```
    Description copied from interface: EventListener
    
    Fired whenever a browser event is received.
    
    Specified by:
    
    onBrowserEvent in interface EventListener
    
    Overrides:
    
    onBrowserEvent in class Widget
    
    Parameters:
    event - the event received
  - removeChangeListener
```
@Deprecated
public void removeChangeListener(ChangeListener listener)
```
    Deprecated. Use the HandlerRegistration.removeHandler() method on the object returned by addChangeHandler(com.google.gwt.event.dom.client.ChangeHandler) instead
  - selectAll
```
public void selectAll()
```
    Selects all of the text in the box. This will only work when the widget is attached to the document and not hidden.
  - setAlignment
```
public void setAlignment(ValueBoxBase.TextAlignment align)
```
  - setCursorPos
```
public void setCursorPos(int pos)
```
    Sets the cursor position. This will only work when the widget is attached to the document and not hidden.
    
    Parameters:
    pos - the new cursor position
  - setDirection
```
public void setDirection(HasDirection.Direction direction)
```
    Description copied from interface: HasDirection
    
    Sets the directionality for a widget.
    
    Specified by:
    
    setDirection in interface HasDirection
    
    Parameters:
    direction - RTL if the directionality should be set to right-to-left, LTR if the directionality should be set to left-to-right DEFAULT if the directionality should not be explicitly set
  - setDirectionEstimator
```
public void setDirectionEstimator(boolean enabled)
```
    Toggles on / off direction estimation.
    
    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 direction estimation model of the auto-dir handler.
    
    Specified by:
    
    setDirectionEstimator in interface HasDirectionEstimator
    
    Parameters:
    directionEstimator - The DirectionEstimator to be set. null means turning off direction estimation.
  - setKey
```
@Deprecated
public void setKey(char key)
```
    Deprecated. this method only works in IE and should not have been added to the API
    
    If a keyboard event is currently being handled by the text box, this method replaces the unicode character or key code associated with it. This allows listeners to easily filter keyboard input.
    
    Parameters:
    key - the new key value
  - setName
```
public void setName(java.lang.String name)
```
    Description copied from interface: HasName
    
    Sets the widget's name.
    
    Specified by:
    
    setName in interface HasName
    
    Parameters:
    name - the widget's new name
  - setReadOnly
```
public void setReadOnly(boolean readOnly)
```
    Turns read-only mode on or off.
    
    Parameters:
    readOnly - if true, the widget becomes read-only; if false the widget becomes editable
  - setSelectionRange
```
public void setSelectionRange(int pos,
                     int length)
```
    Sets the range of text to be selected. This will only work when the widget is attached to the document and not hidden.
    
    Parameters:
    pos - the position of the first character to be selected
    length - the number of characters to be selected
  - setText
```
public void setText(java.lang.String text)
```
    Sets this object's text. Note that some browsers will manipulate the text before adding it to the widget. For example, most browsers will strip all \r from the text, except IE which will add a \r before each \n. Use getText() to get the text directly from the widget.
    
    Specified by:
    
    setText in interface HasText
    
    Parameters:
    text - the object's new text
  - setValue
```
public void setValue(T value)
```
    Description copied from interface: HasValue
    
    Sets this object's value without firing any events. This should be identical to calling setValue(value, false).
    It is acceptable to fail assertions or throw (documented) unchecked exceptions in response to bad values.
    Widgets must accept null as a valid value. By convention, setting a widget to null clears value, calling getValue() on a cleared widget returns null. Widgets that can not be cleared (e.g. CheckBox) must find another valid meaning for null input.
    
    Specified by:
    
    setValue in interface TakesValue<T>
    
    Specified by:
    
    setValue in interface HasValue<T>
    
    Parameters:
    value - the object's new value
    See Also:
    TakesValue.getValue()
  - setValue
```
public void setValue(T value,
            boolean fireEvents)
```
    Description copied from interface: HasValue
    
    Sets this object's value. Fires ValueChangeEvent when fireEvents is true and the new value does not equal the existing value.
    It is acceptable to fail assertions or throw (documented) unchecked exceptions in response to bad values.
    
    Specified by:
    
    setValue in interface HasValue<T>
    
    Parameters:
    value - the object's new value
    fireEvents - fire events if true and value is new
  - getImpl
```
protected com.google.gwt.user.client.ui.impl.TextBoxImpl getImpl()
```
  - onLoad
```
protected void onLoad()
```
    Description copied from class: Widget
    
    This method is called immediately after a widget becomes attached to the browser's document.
    
    Overrides:
    
    onLoad in class Widget

Class ValueBoxBase<T>

Use in UiBinder Templates

Nested Class Summary

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject

Nested classes/interfaces inherited from interface com.google.gwt.i18n.client.HasDirection

Field Summary

Fields inherited from class com.google.gwt.user.client.ui.Widget

Fields inherited from class com.google.gwt.user.client.ui.UIObject

Constructor Summary

Method Summary

Methods inherited from class com.google.gwt.user.client.ui.FocusWidget

Methods inherited from class com.google.gwt.user.client.ui.Widget

Methods inherited from class com.google.gwt.user.client.ui.UIObject

Methods inherited from class java.lang.Object

Methods inherited from interface com.google.gwt.event.dom.client.HasKeyUpHandlers

Methods inherited from interface com.google.gwt.event.shared.HasHandlers

Constructor Detail

ValueBoxBase

Method Detail

addChangeHandler

addValueChangeHandler

asEditor

cancelKey

getCursorPos

getDirection

getDirectionEstimator

getName

getSelectedText

getSelectionLength

getText

getValue

getValueOrThrow

isReadOnly

onBrowserEvent

removeChangeListener

selectAll

setAlignment

setCursorPos

setDirection

setDirectionEstimator

setDirectionEstimator

setKey

setName

setReadOnly

setSelectionRange

setText

setValue

setValue

getImpl

onLoad