com.google.gwt.cell.client.ButtonCell Maven / Gradle / Ivy
/*
* Copyright 2010 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.cell.client;
import static com.google.gwt.dom.client.BrowserEvents.CLICK;
import static com.google.gwt.dom.client.BrowserEvents.KEYDOWN;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.EventTarget;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.text.shared.SafeHtmlRenderer;
import com.google.gwt.text.shared.SimpleSafeHtmlRenderer;
/**
* A {@link Cell} used to render a button.
*/
public class ButtonCell extends AbstractSafeHtmlCell {
/**
* Construct a new ButtonCell that will use a {@link SimpleSafeHtmlRenderer}.
*/
public ButtonCell() {
this(SimpleSafeHtmlRenderer.getInstance());
}
/**
* Construct a new ButtonCell that will use a given {@link SafeHtmlRenderer}.
*
* @param renderer a {@link SafeHtmlRenderer SafeHtmlRenderer} instance
*/
public ButtonCell(SafeHtmlRenderer renderer) {
super(renderer, CLICK, KEYDOWN);
}
@Override
public void onBrowserEvent(Context context, Element parent, String value,
NativeEvent event, ValueUpdater valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
if (CLICK.equals(event.getType())) {
EventTarget eventTarget = event.getEventTarget();
if (!Element.is(eventTarget)) {
return;
}
if (parent.getFirstChildElement().isOrHasChild(Element.as(eventTarget))) {
// Ignore clicks that occur outside of the main element.
onEnterKeyDown(context, parent, value, event, valueUpdater);
}
}
}
@Override
public void render(Context context, SafeHtml data, SafeHtmlBuilder sb) {
sb.appendHtmlConstant("");
}
@Override
protected void onEnterKeyDown(Context context, Element parent, String value,
NativeEvent event, ValueUpdater valueUpdater) {
if (valueUpdater != null) {
valueUpdater.update(value);
}
}
}