Package com.google.gwt.user.client.ui

Class CheckBox

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.ButtonBase
com.google.gwt.user.client.ui.CheckBox
All Implemented Interfaces:
IsEditor<LeafValueEditor<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<Boolean>, HasHandlers, HasDirectionEstimator, HasSafeHtml, EventListener, TakesValue<Boolean>, Focusable, HasDirectionalSafeHtml, HasDirectionalText, HasEnabled, HasFocus, HasHTML, HasName, HasText, HasValue<Boolean>, HasVisibility, HasWordWrap, IsWidget, SourcesClickEvents, SourcesFocusEvents, SourcesKeyboardEvents, SourcesMouseEvents
Direct Known Subclasses:
RadioButton
public class CheckBox extends ButtonBase implements HasName, HasValue<Boolean>, HasWordWrap, HasDirectionalSafeHtml, HasDirectionEstimator, IsEditor<LeafValueEditor<Boolean>>
A standard check box widget. This class also serves as a base class for RadioButton.

Built-in Bidi Text Support

This widget is capable of automatically adjusting its direction according to its content. This feature is controlled by setDirectionEstimator(boolean) or passing a DirectionEstimator parameter to the constructor, and is off by default.

CSS Style Rules

.gwt-CheckBox
the outer element
.gwt-CheckBox-disabled
applied when Checkbox is disabled

Example

public class CheckBoxExample implements EntryPoint {

  @Override
  public void onModuleLoad() {
    // Make a new check box, and select it by default.
    CheckBox cb = new CheckBox("Foo");
    cb.setValue(true);

    // Hook up a handler to find out when it's clicked.
    cb.addClickHandler(new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        boolean checked = ((CheckBox) event.getSource()).getValue();
        Window.alert("It is " + (checked ? "" : "not ") + "checked");
      }
    });

    // Add it to the root panel.
    RootPanel.get().add(cb);
  }
}