/*
* Copyright 2000-2016 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.v7.client.renderers;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.ui.Image;
import com.vaadin.v7.client.widget.grid.RendererCellReference;
/**
* A renderer that renders an image into a cell. Click handlers can be added to
* the renderer, invoked every time any of the images rendered by that rendered
* is clicked.
*
* @since 7.4
* @author Vaadin Ltd
*/
public class ImageRenderer extends ClickableRenderer<String, Image> {
public static final String TRANSPARENT_GIF_1PX = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7";
@Override
public Image createWidget() {
Image image = GWT.create(Image.class);
image.addClickHandler(this);
return image;
}
@Override
public void render(RendererCellReference cell, String url, Image image) {
if (url == null) {
image.setUrl(TRANSPARENT_GIF_1PX);
} else {
image.setUrl(url);
}
}
}