filterdroplistcell.java

exTreme taglib的使用

/*
 * Copyright 2004 original author or authors.
 *
 * 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.extremecomponents.table.cell;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.table.core.TableConstants;
import org.extremecomponents.table.view.HtmlViewUtils;
import org.extremecomponents.util.ExtremeUtils;
import org.extremecomponents.util.HtmlBuilder;

/**
 * A filter cell that is a droplist
 * 
 * @author Jeff Johnston
 */
public class FilterDroplistCell extends BaseCell {
    private static Log logger = LogFactory.getLog(FilterDroplistCell.class);

    public String html() {
        HtmlBuilder html = new HtmlBuilder();

        if (!column.isFilterable()) {
            html.append("");
        } else {
            List droplist = getFilterDropList();
            html.append(dropListHtml(droplist));
        }

        return html.toString();
    }

    protected List getFilterDropList() {
        List droplist = new ArrayList();

        List list = model.getCollectionOfBeans();

        for (Iterator iter = list.iterator(); iter.hasNext();) {
            Object bean = iter.next();
            try {
                Object obj = PropertyUtils.getProperty(bean, column.getProperty());

                if ((obj != null) && !droplist.contains(obj)) {
                    droplist.add(obj);
                }
            } catch (Exception e) {
                logger.debug("Problems getting the droplist.", e);
            }
        }

        Collections.sort(droplist);

        return droplist;
    }

    protected String dropListHtml(List droplist) {
        HtmlBuilder html = new HtmlBuilder();

        html.td(2).close();

        html.newline();
        html.tabs(2);
        html.select().name(model.getTableHandler().prefixWithTableId() + TableConstants.FILTER + column.getProperty());

        StringBuffer onkeypress = new StringBuffer();
        onkeypress.append(HtmlViewUtils.filterJavaScript(model));
        html.onchange(onkeypress.toString());

        html.close();

        html.newline();
        html.tabs(2);
        html.option().value("").close();
        html.optionEnd();

        Locale locale = model.getTableHandler().getTable().getLocale();

        for (Iterator iter = droplist.iterator(); iter.hasNext();) {
            Object value = iter.next();

            if (column.isDate()) {
                value = ExtremeUtils.formatDate(column.getParse(), column.getFormat(), value, locale);
            }

            html.newline();
            html.tabs(2);
            html.option().value("" + value);

            if (value.equals(column.getValue())) {
                html.append(" selected");
            }

            html.close();
            html.append(value);
            html.optionEnd();
        }

        html.newline();
        html.tabs(2);
        html.selectEnd();

        html.tdEnd();

        return html.toString();
    }
}