com.google.gwt.user.client.ui.ToggleButton Maven / Gradle / Ivy
/*
* Copyright 2007 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.user.client.ui;
import com.google.gwt.editor.client.IsEditor;
import com.google.gwt.editor.client.LeafValueEditor;
import com.google.gwt.editor.client.adapters.TakesValueEditor;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
/**
* A ToggleButton is a stylish stateful button which allows the
* user to toggle between up and down states.
*
*
* 
*
*
* CSS Style Rules
*
* -
* .gwt-ToggleButton-up/down/up-hovering/down-hovering/up-disabled/down-disabled
* {.html-face}
*
*
*
*
Example
{@example com.google.gwt.examples.ToggleButtonExample}
*
*/
public class ToggleButton extends CustomButton implements HasValue, IsEditor> {
private static String STYLENAME_DEFAULT = "gwt-ToggleButton";
private LeafValueEditor editor;
{
setStyleName(STYLENAME_DEFAULT);
}
/**
* Constructor for ToggleButton.
*/
public ToggleButton() {
super();
}
/**
* Constructor for ToggleButton. The supplied image is used to
* construct the default face.
*
* @param upImage image for the default face of the button
*/
public ToggleButton(Image upImage) {
super(upImage);
}
/**
* Constructor for ToggleButton. The supplied image is used to
* construct the default face of the button.
*
* @param upImage image for the default (up) face of the button
* @param handler the click handler
*/
public ToggleButton(Image upImage, ClickHandler handler) {
super(upImage, handler);
}
/**
* Constructor for ToggleButton. The supplied image is used to
* construct the default face of the button.
*
* @param upImage image for the default (up) face of the button
* @param listener the click listener
* @deprecated Use {@link #ToggleButton(Image, ClickHandler)} instead
*/
@Deprecated
public ToggleButton(Image upImage, ClickListener listener) {
super(upImage, listener);
}
/**
* Constructor for ToggleButton.
*
* @param upImage image for the default(up) face of the button
* @param downImage image for the down face of the button
*/
public ToggleButton(Image upImage, Image downImage) {
super(upImage, downImage);
}
/**
* Constructor for ToggleButton.
*
* @param upImage image for the default(up) face of the button
* @param downImage image for the down face of the button
* @param handler the click handler
*/
public ToggleButton(Image upImage, Image downImage, ClickHandler handler) {
super(upImage, downImage, handler);
}
/**
* Constructor for ToggleButton.
*
* @param upImage image for the default(up) face of the button
* @param downImage image for the down face of the button
* @param listener clickListener
* @deprecated Use {@link #ToggleButton(Image, Image, ClickHandler)} instead
*/
@Deprecated
public ToggleButton(Image upImage, Image downImage, ClickListener listener) {
super(upImage, downImage, listener);
}
/**
* Constructor for ToggleButton. The supplied text is used to
* construct the default face of the button.
*
* @param upText the text for the default (up) face of the button.
*/
public ToggleButton(String upText) {
super(upText);
}
/**
* Constructor for ToggleButton. The supplied text is used to
* construct the default face of the button.
*
* @param upText the text for the default (up) face of the button
* @param handler the click handler
*/
public ToggleButton(String upText, ClickHandler handler) {
super(upText, handler);
}
/**
* Constructor for ToggleButton. The supplied text is used to
* construct the default face of the button.
*
* @param upText the text for the default (up) face of the button
* @param listener the click listener
* @deprecated Use {@link #ToggleButton(String, ClickHandler)} instead
*/
@Deprecated
public ToggleButton(String upText, ClickListener listener) {
super(upText, listener);
}
/**
* Constructor for ToggleButton.
*
* @param upText the text for the default (up) face of the button
* @param downText the text for down face of the button
*/
public ToggleButton(String upText, String downText) {
super(upText, downText);
}
/**
* Constructor for ToggleButton.
*
* @param upText the text for the default (up) face of the button
* @param downText the text for down face of the button
* @param handler the click handler
*/
public ToggleButton(String upText, String downText, ClickHandler handler) {
super(upText, downText, handler);
}
public HandlerRegistration addValueChangeHandler(
ValueChangeHandler handler) {
return addHandler(handler, ValueChangeEvent.getType());
}
public LeafValueEditor asEditor() {
if (editor == null) {
editor = TakesValueEditor.of(this);
}
return editor;
}
/**
* Determines whether this button is currently down.
*
* @return true if the button is pressed, false otherwise. Will
* not return null
*/
public Boolean getValue() {
return isDown();
}
@Override
public boolean isDown() {
// Changes access to public.
return super.isDown();
}
/**
* {@inheritDoc} Does not fire {@link ValueChangeEvent}. (If you want the
* event to fire, use {@link #setValue(Boolean, boolean)})
*/
@Override
public void setDown(boolean down) {
// Changes access to public.
super.setDown(down);
}
/**
* Sets whether this button is down.
*
* @param value true to press the button, false otherwise; null value implies
* false
*/
public void setValue(Boolean value) {
setValue(value, false);
}
/**
* Sets whether this button is down, firing {@link ValueChangeEvent} if
* appropriate.
*
* @param value true to press the button, false otherwise; null value implies
* false
* @param fireEvents If true, and value has changed, fire a
* {@link ValueChangeEvent}
*/
public void setValue(Boolean value, boolean fireEvents) {
if (value == null) {
value = Boolean.FALSE;
}
boolean oldValue = fireEvents ? isDown() : false;
setDown(value);
if (fireEvents) {
ValueChangeEvent.fireIfNotEqual(this, oldValue, value);
}
}
@Override
protected void onClick() {
toggleDown();
super.onClick();
ValueChangeEvent.fire(this, isDown());
}
}