/*
* Copyright 2011 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.impl;
import com.google.gwt.dom.client.BrowserEvents;
import com.google.gwt.user.client.Element;
/**
* IE9 implementation of {@link com.google.gwt.user.client.impl.DOMImplStandardBase}.
*/
class DOMImplIE9 extends DOMImplStandardBase {
/**
* IE uses a non-standard way of handling drag events.
*/
@Override
protected void initEventSystem() {
super.initEventSystem();
initEventSystemIE();
}
@Override
protected void sinkBitlessEventImpl(Element elem, String eventTypeName) {
super.sinkBitlessEventImpl(elem, eventTypeName);
if (BrowserEvents.DRAGOVER.equals(eventTypeName)) {
/*
* In IE, we have to sink dragenter with dragover in order to make an
* element a drop target.
*/
super.sinkBitlessEventImpl(elem, BrowserEvents.DRAGENTER);
}
}
private native void initEventSystemIE() /*-{
// In IE, drag events return false instead of calling preventDefault.
@com.google.gwt.user.client.impl.DOMImplStandard::dispatchDragEvent = $entry(function(evt) {
@com.google.gwt.user.client.impl.DOMImplStandard::dispatchEvent.call(this, evt);
return false;
});
}-*/;
}