Add empty rows to the end of related list and list view tables.

[online-glom:gwt-glom.git] / src / main / java / org / glom / web / client / ui / cell / OpenButtonCell.java

/*
 * Copyright (C) 2011 Openismus GmbH
 *
 * This file is part of GWT-Glom.
 *
 * GWT-Glom is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.glom.web.client.ui.cell;

import org.glom.web.client.place.DetailsPlace;
import org.glom.web.client.ui.ListView.Presenter;
import org.glom.web.client.ui.list.ListTable;

import com.google.gwt.cell.client.ButtonCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;

/**
 * Cell renderer for {@link ListTable} open buttons.
 * 
 * @author Ben Konrath <ben@bagu.org>
 * 
 */
public class OpenButtonCell extends ButtonCell {
        private String documentID;
        private String tableName;
        private Presenter presenter;

        public OpenButtonCell(String documentID, String tableName, Presenter presenter) {
                this.documentID = documentID;
                this.tableName = tableName;
                this.presenter = presenter;
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.cell.client.ButtonCell#onEnterKeyDown(com.google.gwt.cell.client.Cell.Context,
         * com.google.gwt.dom.client.Element, java.lang.String, com.google.gwt.dom.client.NativeEvent,
         * com.google.gwt.cell.client.ValueUpdater)
         */
        @Override
        protected void onEnterKeyDown(Context context, Element parent, String value, NativeEvent event,
                        ValueUpdater<String> valueUpdater) {
                super.onEnterKeyDown(context, parent, value, event, valueUpdater);
                presenter.goTo(new DetailsPlace(documentID, tableName, (String) context.getKey()));
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.cell.client.ButtonCell#render(com.google.gwt.cell.client.Cell.Context,
         * com.google.gwt.safehtml.shared.SafeHtml, com.google.gwt.safehtml.shared.SafeHtmlBuilder)
         */
        @Override
        public void render(Context context, SafeHtml data, SafeHtmlBuilder sb) {
                if (data == null)
                        // The value is from an empty row.
                        sb.appendHtmlConstant("&nbsp;");
                else
                        super.render(context, data, sb);
        }

}