/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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.vaadin.client.ui;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.vaadin.client.BrowserInfo;
/**
* A image based implementation of {@link Icon}.
* <p>
* The image is loaded from the given URL ( {@link #setUri(String)}) and
* displayed in full.
* </p>
*
* @author Vaadin Ltd
*/
public class ImageIcon extends Icon {
public static final String CLASSNAME = "v-icon";
public ImageIcon() {
setElement(DOM.createImg());
setStyleName(CLASSNAME);
}
@Override
public void setUri(final String imageUrl) {
/*
* Start sinking onload events, widgets responsibility to react. We must
* do this BEFORE we set src as IE fires the event immediately if the
* image is found in cache (#2592).
*/
sinkEvents(Event.ONLOAD);
if (BrowserInfo.get().isIE()) {
// apply src later for IE, to ensure onload is fired
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
@Override
public void execute() {
DOM.setElementProperty(getElement(), "src", imageUrl);
}
});
}
DOM.setElementProperty(getElement(), "src", imageUrl);
}
@Override
public void setAlternateText(String alternateText) {
getElement().setAttribute("alt",
alternateText == null ? "" : alternateText);
}
@Override
public String getUri() {
return DOM.getElementProperty(getElement(), "src");
}
}