com.google.gwt.user.client.ui.Button Maven / Gradle / Ivy
/*
* Copyright 2006 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.dom.client.ButtonElement;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.safehtml.shared.SafeHtml;
/**
* A standard push-button widget.
*
*
* 
*
*
* CSS Style Rules
*
* - .gwt-Button
* - the outer element
*
*
*
*
Example
* {@example com.google.gwt.examples.ButtonExample}
*
*/
public class Button extends ButtonBase {
/**
* Creates a Button widget that wraps an existing <button> element.
*
* This element must already be attached to the document. If the element is
* removed from the document, you must call
* {@link RootPanel#detachNow(Widget)}.
*
* @param element the element to be wrapped
*/
public static Button wrap(com.google.gwt.dom.client.Element element) {
// Assert that the element is attached.
assert Document.get().getBody().isOrHasChild(element);
Button button = new Button(element);
// Mark it attached and remember it for cleanup.
button.onAttach();
RootPanel.detachOnWindowClose(button);
return button;
}
/**
* Creates a button with no caption.
*/
public Button() {
super(Document.get().createPushButtonElement());
setStyleName("gwt-Button");
}
/**
* Creates a button with the given HTML caption.
*
* @param html the HTML caption
*/
public Button(SafeHtml html) {
this(html.asString());
}
/**
* Creates a button with the given HTML caption.
*
* @param html the HTML caption
*/
public Button(String html) {
this();
setHTML(html);
}
/**
* Creates a button with the given HTML caption and click listener.
*
* @param html the HTML caption
* @param listener the click listener
* @deprecated Use {@link Button#Button(String, ClickHandler)} instead
*/
@Deprecated
public Button(String html, ClickListener listener) {
this(html);
addClickListener(listener);
}
/**
* Creates a button with the given HTML caption and click listener.
*
* @param html the html caption
* @param handler the click handler
*/
public Button(SafeHtml html, ClickHandler handler) {
this(html.asString(), handler);
}
/**
* Creates a button with the given HTML caption and click listener.
*
* @param html the HTML caption
* @param handler the click handler
*/
public Button(String html, ClickHandler handler) {
this(html);
addClickHandler(handler);
}
/**
* This constructor may be used by subclasses to explicitly use an existing
* element. This element must be a <button> element.
*
* @param element the element to be used
*/
protected Button(com.google.gwt.dom.client.Element element) {
super(element. cast());
ButtonElement.as(element);
}
/**
* Programmatic equivalent of the user clicking the button.
*/
public void click() {
getButtonElement().click();
}
/**
* Get the underlying button element.
*
* @return the {@link ButtonElement}
*/
protected ButtonElement getButtonElement() {
return getElement().cast();
}
}