AdminColumnRenderer.java example

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activityinfo-master
package org.activityinfo.ui.client.page.entry.column;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.widget.grid.ColumnData;
import com.extjs.gxt.ui.client.widget.grid.Grid;
import com.extjs.gxt.ui.client.widget.grid.GridCellRenderer;
import com.google.common.collect.Sets;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import org.activityinfo.legacy.shared.model.AdminEntityDTO;
import org.activityinfo.legacy.shared.model.AdminLevelDTO;
import org.activityinfo.legacy.shared.model.AdminLevelPredicates;
import org.activityinfo.legacy.shared.model.SiteDTO;

import java.util.List;
import java.util.Set;

/**
 * Renders the site's admin membership as a single cell, with a maximum of three
 * rows, with a quick tip for the rest.
 */
public class AdminColumnRenderer implements GridCellRenderer<ModelData> {

    private List<AdminLevelDTO> levels;

    // reused to avoid reallocing for each row
    private Set<String> seen = Sets.newHashSet();

    public AdminColumnRenderer(List<AdminLevelDTO> levels) {
        super();
        this.levels = AdminLevelPredicates.breadthFirstSort(levels);
    }

    @Override
    public Object render(ModelData model,
                         String property,
                         ColumnData config,
                         int rowIndex,
                         int colIndex,
                         ListStore<ModelData> store,
                         Grid<ModelData> grid) {
        if (model instanceof SiteDTO) {
            return render((SiteDTO) model);
        } else {
            return "";
        }
    }

    private Object render(SiteDTO model) {

        StringBuilder qtip = new StringBuilder();
        SafeHtmlBuilder summary = new SafeHtmlBuilder();

        // we use this set to keep track of names that we've added
        // to the summary to avoid duplication that is common between
        // territories, zones de sante, provinces and districts, etc
        seen.clear();

        int summaryLines = 0;

        for (AdminLevelDTO level : levels) {
            AdminEntityDTO entity = model.getAdminEntity(level.getId());

            if (entity != null) {
                String name = entity.getName();
                if (qtip.length() > 0) {
                    qtip.append("<br>");
                }
                qtip.append(level.getName()).append(": ").append(name);
                if (summaryLines < 3 && !seen.contains(name)) {
                    if (summaryLines > 0) {
                        summary.appendHtmlConstant("<br/>");
                    }
                    summary.appendEscaped(name);
                    seen.add(name);
                    summaryLines++;
                }
            }
        }
        // return summary.toSafeHtml().asString();
        return ColumnTemplates.INSTANCE.adminCell(qtip.toString(), summary.toSafeHtml()).asString();
    }
}