DynamicCallbackFormImplIE8.java

/*
 * Copyright 2008 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 org.rhq.coregui.client.components.upload;

import com.google.gwt.dom.client.Element;

/**
 * Implementation class used by {@link com.google.gwt.user.client.ui.FormPanel}.
 */
public class DynamicCallbackFormImplIE8  extends DynamicCallbackFormImpl {

    @Override
    public native void hookEvents(Element iframe,
                                  DynamicCallbackFormImplHost listener) /*-{
        if (iframe) {
            iframe.onreadystatechange = function() {
                // If there is no __formAction yet, this is a spurious onreadystatechange
                // generated when the iframe is first added to the DOM.
                if (!iframe.__formAction)
                    return;

                if (iframe.readyState == 'complete') {
                    // If the iframe's contentWindow has not navigated to the expected action
                    // url, then it must be an error, so we ignore it.
                    listener.@org.rhq.coregui.client.components.upload.DynamicCallbackFormImplHost::onFrameLoad()();
                }
            };
        }
    }-*/;

    @Override
    public native void unhookEvents(Element iframe) /*-{
        if (iframe)
            iframe.onreadystatechange = null;
    }-*/;

}