com.google.gwt.user.client.ui
Class SimpleCheckBox

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.SimpleCheckBox

All Implemented Interfaces:

IsEditor<LeafValueEditor<java.lang.Boolean>>, HasAllDragAndDropHandlers, HasAllFocusHandlers, HasAllGestureHandlers, HasAllKeyHandlers, HasAllMouseHandlers, HasAllTouchHandlers, HasBlurHandlers, 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<java.lang.Boolean>, HasHandlers, EventListener, TakesValue<java.lang.Boolean>, Focusable, HasEnabled, HasFocus, HasName, HasValue<java.lang.Boolean>, HasVisibility, IsWidget, SourcesClickEvents, SourcesFocusEvents, SourcesKeyboardEvents, SourcesMouseEvents

Direct Known Subclasses:

SimpleRadioButton

public class SimpleCheckBox
extends FocusWidget
implements HasName, HasValue<java.lang.Boolean>, IsEditor<LeafValueEditor<java.lang.Boolean>>

A simple checkbox widget, with no label.

CSS Style Rules

• .gwt-SimpleCheckBox { }
• .gwt-SimpleCheckBox-disabled { Applied when checkbox is disabled }

SimpleCheckBox

public SimpleCheckBox()

Creates a new simple checkbox.

SimpleCheckBox

protected SimpleCheckBox(Element element)

This constructor may be used by subclasses to explicitly use an existing element. This element must be an <input> element whose type is either 'checkbox'.

Parameters:

element - the element to be used

SimpleCheckBox

SimpleCheckBox(Element element,
               java.lang.String styleName)

wrap

public static SimpleCheckBox wrap(Element element)

Creates a SimpleCheckBox widget that wraps an existing <input type='checkbox'> element. This element must already be attached to the document. If the element is removed from the document, you must call RootPanel.detachNow(Widget).

Parameters:

element - the element to be wrapped

addValueChangeHandler

public HandlerRegistration addValueChangeHandler(ValueChangeHandler<java.lang.Boolean> handler)

Description copied from interface: HasValueChangeHandlers

Adds a ValueChangeEvent handler.

Specified by:

addValueChangeHandler in interface HasValueChangeHandlers<java.lang.Boolean>

Parameters:

handler - the handler

Returns:

the registration for the event

asEditor

public LeafValueEditor<java.lang.Boolean> asEditor()

Description copied from interface: IsEditor

Returns the Editor encapsulated by the view object.

Specified by:

asEditor in interface IsEditor<LeafValueEditor<java.lang.Boolean>>

Returns:

an Editor of type E

getFormValue

public java.lang.String getFormValue()

Returns the value property of the input element that backs this widget. This is the value that will be associated with the check box name and submitted to the server if a FormPanel that holds it is submitted and the box is checked.

Don't confuse this with getValue(), which returns true or false if the widget is checked.

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

getValue

public java.lang.Boolean getValue()

Determines whether this check box is currently checked.

Note that this does not return the value property of the checkbox input element wrapped by this widget. For access to that property, see getFormValue()

Specified by:

getValue in interface TakesValue<java.lang.Boolean>

Specified by:

getValue in interface HasValue<java.lang.Boolean>

Returns:

true if the check box is checked, false otherwise. Will not return null

See Also:

TakesValue.setValue(V)

isChecked

@Deprecated
public boolean isChecked()

Deprecated. Use getValue() instead

Determines whether this check box is currently checked.

Returns:

true if the check box is checked

setChecked

@Deprecated
public void setChecked(boolean checked)

Deprecated. Use setValue(Boolean) instead

Checks or unchecks this check box.

Parameters:

checked - true to check the check box

setEnabled

public void setEnabled(boolean enabled)

Description copied from class: FocusWidget

Sets whether this widget is enabled.

Specified by:

setEnabled in interface HasEnabled

Overrides:

setEnabled in class FocusWidget

Parameters:

enabled - true to enable the widget, false to disable it

setFormValue

public void setFormValue(java.lang.String value)

Set the value property on the input element that backs this widget. This is the value that will be associated with the check box's name and submitted to the server if a FormPanel that holds it is submitted and the box is checked.

Don't confuse this with setValue(java.lang.Boolean), which actually checks and unchecks the box.

Parameters:

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

setValue

public void setValue(java.lang.Boolean value)

Checks or unchecks the check box.

Note that this does not set the value property of the checkbox input element wrapped by this widget. For access to that property, see setFormValue(String)

Specified by:

setValue in interface TakesValue<java.lang.Boolean>

Specified by:

setValue in interface HasValue<java.lang.Boolean>

Parameters:

value - true to check, false to uncheck; null value implies false

See Also:

TakesValue.getValue()

setValue

public void setValue(java.lang.Boolean value,
                     boolean fireEvents)

Checks or unchecks the check box, firing ValueChangeEvent if appropriate.

Note that this does not set the value property of the checkbox input element wrapped by this widget. For access to that property, see setFormValue(String)

Specified by:

setValue in interface HasValue<java.lang.Boolean>

Parameters:

value - true to check, false to uncheck; null value implies false

fireEvents - If true, and value has changed, fire a ValueChangeEvent

ensureDomEventHandlers

protected void ensureDomEventHandlers()

onUnload

protected void onUnload()

This method is called when a widget is detached from the browser's document. Overridden because of IE bug that throws away checked state.

Overrides:

onUnload in class Widget