com.retech.reader.web.client.labs.LabsIconDecoratorCell.java Source code

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Here is the source code for com.retech.reader.web.client.labs.LabsIconDecoratorCell.java

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/*
 * Copyright 2012 Goodow.com
 * 
 * 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.retech.reader.web.client.labs;

import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.BrowserEvents;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.safehtml.client.SafeHtmlTemplates;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.ui.AbstractImagePrototype;

public class LabsIconDecoratorCell extends AbstractCell<LabsIconDecorator> {

    public interface Delegate<ImageAndHyperlink> {
        void execute(ImageAndHyperlink object);
    }

    interface Template extends SafeHtmlTemplates {

        @SafeHtmlTemplates.Template("<div class='{2}'>{0}<span>{1}</span></div>")
        SafeHtml put(SafeHtml num, SafeHtml url, String style);
    }

    private static Template template = GWT.create(Template.class);
    private Delegate<LabsIconDecorator> delegate;

    public LabsIconDecoratorCell(final Delegate<LabsIconDecorator> delegate) {
        super(BrowserEvents.CLICK);
        this.delegate = delegate;
    }

    @Override
    public void onBrowserEvent(final com.google.gwt.cell.client.Cell.Context context, final Element parent,
            final LabsIconDecorator value, final NativeEvent event,
            final ValueUpdater<LabsIconDecorator> valueUpdater) {
        super.onBrowserEvent(context, parent, value, event, valueUpdater);
        boolean isClick = event.getType().equals(BrowserEvents.CLICK);
        if (isClick) {
            onEnterKeyDown(context, parent, value, event, valueUpdater);
        }
    }

    @Override
    public void render(final com.google.gwt.cell.client.Cell.Context context, final LabsIconDecorator value,
            final SafeHtmlBuilder sb) {
        if (value == null) {
            return;
        }
        SafeHtml image = AbstractImagePrototype.create(value.getImage()).getSafeHtml();
        SafeHtml link = SafeHtmlUtils.fromTrustedString(value.getTitle());
        sb.append(template.put(image, link, LabsResources.css().cellItemLeftDiv()));

    }

    @Override
    protected void onEnterKeyDown(final com.google.gwt.cell.client.Cell.Context context, final Element parent,
            final LabsIconDecorator value, final NativeEvent event,
            final ValueUpdater<LabsIconDecorator> valueUpdater) {
        if (value != null) {
            delegate.execute(value);
        }
    }
}