/*
* Copyright 2010 Traction Software, 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.tractionsoftware.gwt.user.client.ui;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.FocusWidget;
import com.google.gwt.user.client.ui.HasValue;
/**
* Input widget.
*
* <h3>Code Source</h3>
*
* <p>
* This is external code that was copied into the CedarCommon codebase under
* the terms of its license.
* </p>
*
* <blockquote>
* <table border="1" cellpadding="5" cellspacing="0">
* <tbody>
* <tr>
* <td><i>Source:</i></td>
* <td><a href="http://tractionsoftware.github.io/gwt-traction/">Traction Software</a></td>
* </tr>
* <tr>
* <td><i>Date:</i></td>
* <td>July, 2014</td>
* </tr>
* <tr>
* <td><i>Reason:</i></td>
* <td>The official Traction-supplied jar in Maven only supports Java 1.7+, but CedarCommon supports Java 1.6+.</td>
* </tr>
* </tbody>
* </table>
* </blockquote>
*
* @author Andy @ Traction Software
*/
public class InputWidget extends FocusWidget implements HasValue<String> {
private String lastValue = null;
public InputWidget(String type) {
super(DOM.createElement("input"));
getElement().setAttribute("type", type);
// fire a change event on change or blur
addDomHandler(new ChangeHandler() {
@Override
public void onChange(ChangeEvent event) {
fireValueChangeHandler(getValue());
}
}, ChangeEvent.getType());
addBlurHandler(new BlurHandler() {
@Override
public void onBlur(BlurEvent event) {
fireValueChangeHandler(getValue());
}
});
}
@Override
public HandlerRegistration addValueChangeHandler(ValueChangeHandler<String> handler) {
return addHandler(handler, ValueChangeEvent.getType());
}
@Override
public String getValue() {
return DOM.getElementProperty(getElement(), "value");
}
@Override
public void setValue(String value) {
setValue(value, false);
}
@Override
public void setValue(String value, boolean fireEvents) {
if (value == null) value = "";
DOM.setElementProperty(getElement(), "value", value);
if (fireEvents) {
fireValueChangeHandler(value);
}
else {
// we still want to keep track of changes to the value
lastValue = value;
}
}
private void fireValueChangeHandler(String value) {
ValueChangeEvent.fireIfNotEqual(this, lastValue, value);
lastValue = value;
}
}