org.freemedsoftware.gwt.client.screen.ToolsScreen.java Source code

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Here is the source code for org.freemedsoftware.gwt.client.screen.ToolsScreen.java

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/*
 * $Id$
 *
 * Authors:
 *      Jeff Buchbinder <jeff@freemedsoftware.org>
 *
 * FreeMED Electronic Medical Record and Practice Management System
 * Copyright (C) 1999-2012 FreeMED Software Foundation
 *
 * 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.
 */

package org.freemedsoftware.gwt.client.screen;

import static org.freemedsoftware.gwt.client.i18n.I18nUtil._;

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

import org.freemedsoftware.gwt.client.JsonUtil;
import org.freemedsoftware.gwt.client.ScreenInterface;
import org.freemedsoftware.gwt.client.Util;
import org.freemedsoftware.gwt.client.Util.ProgramMode;
import org.freemedsoftware.gwt.client.i18n.AppConstants;
import org.freemedsoftware.gwt.client.widget.CustomTable;
import org.freemedsoftware.gwt.client.widget.CustomTable.TableRowClickHandler;

import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.URL;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;

public class ToolsScreen extends ScreenInterface {

    public final static String moduleName = "Tools";

    protected CustomTable toolTable;

    private static List<ToolsScreen> toolsScreenList = null;

    // Creates only desired amount of instances if we follow this pattern
    // otherwise we have public constructor as well
    public static ToolsScreen getInstance() {
        ToolsScreen toolsScreen = null;

        if (toolsScreenList == null) {
            toolsScreenList = new ArrayList<ToolsScreen>();
        }
        if (toolsScreenList.size() < AppConstants.MAX_TOOLS_TABS) {
            // creates & returns new next instance of SupportDataScreen
            toolsScreenList.add(toolsScreen = new ToolsScreen());
        } else { // returns last instance of ToolsScreen from list
            toolsScreen = toolsScreenList.get(AppConstants.MAX_TOOLS_TABS - 1);
        }
        return toolsScreen;
    }

    public static boolean removeInstance(ToolsScreen toolsScreen) {
        return toolsScreenList.remove(toolsScreen);
    }

    public ToolsScreen() {
        super(moduleName);
        final HorizontalPanel horizontalPanel = new HorizontalPanel();
        initWidget(horizontalPanel);
        horizontalPanel.setSize("100%", "100%");

        final VerticalPanel verticalPanel = new VerticalPanel();
        horizontalPanel.add(verticalPanel);
        verticalPanel.setSize("100%", "100%");

        final Label pleaseChooseALabel = new Label(_("Please choose a tool."));
        verticalPanel.add(pleaseChooseALabel);
        pleaseChooseALabel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

        toolTable = new CustomTable();
        verticalPanel.add(toolTable);
        toolTable.setAllowSelection(false);
        toolTable.setSize("100%", "100%");
        toolTable.setIndexName("tool_uuid");
        toolTable.addColumn(_("Name"), "tool_name");
        toolTable.addColumn(_("Description"), "tool_desc");
        toolTable.setTableRowClickHandler(new TableRowClickHandler() {
            @Override
            public void handleRowClick(HashMap<String, String> data, int col) {
                ToolsExecutionScreen screen = new ToolsExecutionScreen(data.get("tool_name"),
                        data.get("tool_uuid"));
                Util.spawnTab(data.get("tool_name"), screen);
            }
        });

        // After everything is initialized, start population routine.
        populate();
    }

    public void populate() {
        if (Util.getProgramMode() == ProgramMode.STUBBED) {
            // TODO: handle stubbed
        } else if (Util.getProgramMode() == ProgramMode.JSONRPC) {
            toolTable.showloading(true);
            String[] params = {};
            RequestBuilder builder = new RequestBuilder(RequestBuilder.POST,
                    URL.encode(Util.getJsonRequest("org.freemedsoftware.module.Tools.GetTools", params)));
            try {
                builder.sendRequest(null, new RequestCallback() {
                    public void onError(com.google.gwt.http.client.Request request, Throwable ex) {
                        GWT.log("Exception", ex);
                    }

                    @SuppressWarnings("unchecked")
                    public void onResponseReceived(com.google.gwt.http.client.Request request,
                            com.google.gwt.http.client.Response response) {
                        if (200 == response.getStatusCode()) {
                            HashMap<String, String>[] result = (HashMap<String, String>[]) JsonUtil.shoehornJson(
                                    JSONParser.parseStrict(response.getText()), "HashMap<String,String>[]");
                            if (result != null) {
                                toolTable.loadData(result);
                            } else {
                                toolTable.showloading(false);
                            }
                        } else {
                        }
                    }
                });
            } catch (RequestException e) {
                GWT.log("Exception", e);
            }
        } else {
            // TODO: Make this work with GWT-RPC
        }
    }

    @Override
    public void closeScreen() {
        super.closeScreen();
        removeInstance(this);
    }
}