Enable the table selector in the DetailsView.

[online-glom:gwt-glom.git] / src / main / java / org / glom / web / client / activity / DetailsActivity.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.activity;

import java.util.ArrayList;

import org.glom.web.client.ClientFactory;
import org.glom.web.client.OnlineGlomServiceAsync;
import org.glom.web.client.event.TableChangeEvent;
import org.glom.web.client.event.TableChangeEventHandler;
import org.glom.web.client.place.DetailsPlace;
import org.glom.web.client.ui.DetailsView;
import org.glom.web.shared.GlomField;
import org.glom.web.shared.layout.LayoutGroup;
import org.glom.web.shared.layout.LayoutItem;
import org.glom.web.shared.layout.LayoutItemField;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.place.shared.Place;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

/**
 * @author Ben Konrath <ben@bagu.org>
 */
public class DetailsActivity extends AbstractActivity implements DetailsView.Presenter {
        private final String documentID;
        private final String tableName;
        private final String primaryKey;
        private final ClientFactory clientFactory;
        private final DetailsView detailsView;

        public DetailsActivity(DetailsPlace place, ClientFactory clientFactory) {
                this.documentID = place.getDocumentID();
                this.tableName = place.getTableName();
                this.primaryKey = place.getPrimaryKeyValue();
                this.clientFactory = clientFactory;
                detailsView = clientFactory.getDetailsView();
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.activity.shared.Activity#start(com.google.gwt.user.client.ui.AcceptsOneWidget,
         * com.google.gwt.event.shared.EventBus)
         */
        @Override
        public void start(AcceptsOneWidget panel, EventBus eventBus) {
                // register this class as the presenter
                detailsView.setPresenter(this);

                // TODO here's where we should check for database authentication - see ListActivity.start() for how to do this

                // set the change handler for the table selection widget
                eventBus.addHandler(TableChangeEvent.TYPE, new TableChangeEventHandler() {
                        @Override
                        public void onTableChange(final TableChangeEvent event) {
                                goTo(new DetailsPlace(documentID, event.getTableName(), ""));
                        }
                });

                // get the layout for the DetailsView
                AsyncCallback<ArrayList<LayoutGroup>> layoutCallback = new AsyncCallback<ArrayList<LayoutGroup>>() {
                        public void onFailure(Throwable caught) {
                                // FIXME: need to deal with failure
                                System.out.println("AsyncCallback Failed: OnlineGlomService.getDetailsLayout()");
                        }

                        @Override
                        public void onSuccess(ArrayList<LayoutGroup> result) {
                                addLayoutGroups(result);
                        }
                };
                OnlineGlomServiceAsync.Util.getInstance().getDetailsLayout(documentID, tableName, layoutCallback);

                // get the data from the server
                AsyncCallback<GlomField[]> callback = new AsyncCallback<GlomField[]>() {
                        public void onFailure(Throwable caught) {
                                // FIXME: need to deal with failure
                                System.out.println("AsyncCallback Failed: OnlineGlomService.getDetailsData()");
                        }

                        @Override
                        public void onSuccess(GlomField[] result) {
                                // FIXME there's no guarantee that the layout will be ready for this
                                detailsView.setData(result);
                        }
                };
                OnlineGlomServiceAsync.Util.getInstance().getDetailsData(documentID, tableName, primaryKey, callback);

                // indicate that the view is ready to be displayed
                panel.setWidget(detailsView.asWidget());
        }

        private void addLayoutGroups(ArrayList<LayoutGroup> layoutGroups) {
                for (LayoutGroup layoutGroup : layoutGroups) {
                        addLayoutGroup(layoutGroup, "");
                }
        }

        /*
         * This is just a temporary method for creating a basic indented layout without the flowtable/spreadtable that Glom
         * has.
         */
        private void addLayoutGroup(LayoutGroup layoutGroup, String indent) {
                if (layoutGroup == null)
                        return;

                // look at each child item
                ArrayList<LayoutItem> layoutItems = layoutGroup.getItems();
                for (LayoutItem layoutItem : layoutItems) {

                        if (layoutItem == null)
                                continue;

                        String title = layoutItem.getTitle();
                        if (layoutItem instanceof LayoutItemField)
                                detailsView.addLayoutField(indent + title);
                        else if (!title.isEmpty())
                                detailsView.addLayoutGroup(indent + title);

                        // recurse into child groups
                        if (layoutItem instanceof LayoutGroup)
                                addLayoutGroup((LayoutGroup) layoutItem, indent + "-- ");
                }
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.activity.shared.Activity#onCancel()
         */
        @Override
        public void onCancel() {
                detailsView.clear();
        }

        /*
         * (non-Javadoc)
         * 
         * @see com.google.gwt.activity.shared.Activity#onStop()
         */
        @Override
        public void onStop() {
                detailsView.clear();
        }

        /*
         * (non-Javadoc)
         * 
         * @see org.glom.web.client.ui.DetailsView.Presenter#goTo(com.google.gwt.place.shared.Place)
         */
        @Override
        public void goTo(Place place) {
                clientFactory.getPlaceController().goTo(place);
        }

}