edu.nrao.dss.client.widget.explorers.WindowRangeExplorer.java Source code

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Here is the source code for edu.nrao.dss.client.widget.explorers.WindowRangeExplorer.java

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// Copyright (C) 2011 Associated Universities, Inc. Washington DC, USA.
// 
// 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 2 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, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
// 
// Correspondence concerning GBT software should be addressed as follows:
//       GBT Operations
//       National Radio Astronomy Observatory
//       P. O. Box 2
//       Green Bank, WV 24944-0002 USA

package edu.nrao.dss.client.widget.explorers;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import com.extjs.gxt.ui.client.Style.Scroll;
import com.extjs.gxt.ui.client.data.BaseModelData;
import com.extjs.gxt.ui.client.data.BasePagingLoadResult;
import com.extjs.gxt.ui.client.widget.form.CheckBox;
import com.extjs.gxt.ui.client.widget.grid.CellEditor;
import com.extjs.gxt.ui.client.widget.grid.CheckColumnConfig;
import com.extjs.gxt.ui.client.widget.grid.ColumnConfig;
import com.extjs.gxt.ui.client.widget.grid.ColumnModel;
import com.google.gwt.http.client.RequestBuilder;

import edu.nrao.dss.client.data.WindowRangeType;
import edu.nrao.dss.client.util.DynamicHttpProxy;
import edu.nrao.dss.client.widget.PeriodGroupInfoPanel;
import edu.nrao.dss.client.widget.form.DateEditField;
import edu.nrao.dss.client.widget.form.DisplayField;

public class WindowRangeExplorer extends Explorer {

    private int windowId;
    private String sessionHandle;
    private List<ColumnConfig> configs;
    // the parent panel who needs to be updated frequently
    protected PeriodGroupInfoPanel pg;

    public WindowRangeExplorer(int windowId, String sessionHandle) {
        super("/scheduler/windowRanges", "", new WindowRangeType(columnTypes));
        this.windowId = windowId;
        this.sessionHandle = sessionHandle;
        setShowColumnsMenu(false);

        setCreateFilterToolBar(false);
        initLayout(initColumnModel(), true);
        filterByWindow(windowId);
        setHeaderVisible(true);
        setHeading("Window Ranges");
        // try this
        setAutoHeight(true);
        setScrollMode(Scroll.AUTOY);
        getGrid().setAutoHeight(true);
    }

    private ColumnModel initColumnModel() {
        configs = new ArrayList<ColumnConfig>();
        CheckColumnConfig checkColumn;
        for (ColumnType ct : columnTypes) {
            if (ct.getClasz() != Boolean.class) {
                configs.add(new PeriodColConfig(ct.getId(), ct.getName(), ct.getLength(), ct.getClasz()));
            } else {
                checkColumn = new CheckColumnConfig(ct.getId(), ct.getName(), ct.getLength());
                checkColumn.setEditor(new CellEditor(new CheckBox()));
                configs.add(checkColumn);
                checkBoxes.add(checkColumn);
            }
        }
        return new ColumnModel(configs);
    }

    // make sure we pull in only ranges belonging to this window
    private void filterByWindow(int id) {
        String url = getRootURL() + "?filterWindowId=" + Integer.toString(id);
        RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
        DynamicHttpProxy<BasePagingLoadResult<BaseModelData>> proxy = getProxy();
        proxy.setBuilder(builder);
    }

    // override Explorer's loadData so that when it get's called in the parent class,
    // we get ranges for just this window 
    public void loadData() {
        filterByWindow(windowId);
        loader.load(0, getPageSize());
    }

    // make sure newly added ranges belong to this window
    protected void addRecord(HashMap<String, Object> fields) {
        fields.put("window_id", windowId);
        //fields.put("handle", sessionHandle);
        super.addRecord(fields);
    }

    // what gets displayed/edited, and how?
    private static final ColumnType[] columnTypes = {
            new ColumnType("start", "Start", 70, false, DateEditField.class),
            new ColumnType("duration", "Days", 70, false, Integer.class),
            new ColumnType("end", "Last Date", 70, false, DisplayField.class) };

    // who gets updates when changes are made?
    public void registerObservers(PeriodGroupInfoPanel pg) {
        this.pg = pg;
    }

    // reload all the window info when a change gets made to the window range
    public void updateObservers() {
        pg.getPeriodGroup();
    }

}