MapEditor.java

package org.activityinfo.ui.client.component.report.editor.map;

/*
 * #%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.event.BaseEvent;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.widget.Component;
import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.extjs.gxt.ui.client.widget.layout.AbsoluteData;
import com.extjs.gxt.ui.client.widget.layout.AbsoluteLayout;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Element;
import com.google.inject.Inject;
import org.activityinfo.i18n.shared.I18N;
import org.activityinfo.legacy.client.AsyncMonitor;
import org.activityinfo.legacy.client.Dispatcher;
import org.activityinfo.legacy.client.monitor.MaskingAsyncMonitor;
import org.activityinfo.legacy.shared.command.RenderElement.Format;
import org.activityinfo.legacy.shared.reports.model.MapReportElement;
import org.activityinfo.legacy.shared.reports.model.layers.MapLayer;
import org.activityinfo.ui.client.EventBus;
import org.activityinfo.ui.client.component.report.editor.map.layerOptions.LayerOptionsPanel;
import org.activityinfo.ui.client.page.report.ReportEventBus;
import org.activityinfo.ui.client.page.report.editor.ReportElementEditor;

import java.util.Arrays;
import java.util.List;

public class MapEditor extends ContentPanel implements ReportElementEditor<MapReportElement> {

    private static final int CONTROL_TOP_MARGIN = 10;
    private static final int ZOOM_CONTROL_LEFT_MARGIN = 10;

    private final Dispatcher dispatcher;
    private final ReportEventBus reportEventBus;
    private final EventBus eventBus;

    // Contained widgets
    private MapEditorMapView mapPanel;
    private LayersWidget layersWidget;
    private LayerOptionsPanel optionsPanel;
    private MapReportElement mapReportElement = new MapReportElement();
    private AbsoluteLayout layout;

    @Inject
    public MapEditor(Dispatcher dispatcher, EventBus eventBus) {
        this.dispatcher = dispatcher;
        this.eventBus = eventBus;
        this.reportEventBus = new ReportEventBus(eventBus, this);

        MapResources.INSTANCE.style().ensureInjected();

        initializeComponent();

        createMap();
        createLayersOptionsPanel();
        createLayersWidget();
    }

    protected void initializeComponent() {
        setHeaderVisible(false);
        layout = new AbsoluteLayout();
        setLayout(layout);
    }

    protected void createLayersOptionsPanel() {
        optionsPanel = new LayerOptionsPanel(dispatcher);
        optionsPanel.setVisible(false);

        optionsPanel.addListener(Events.Hide, new Listener<BaseEvent>() {

            @Override
            public void handleEvent(BaseEvent be) {
                mapPanel.setZoomControlOffsetX(ZOOM_CONTROL_LEFT_MARGIN);
            }
        });

        optionsPanel.addListener(Events.Show, new Listener<BaseEvent>() {

            @Override
            public void handleEvent(BaseEvent be) {
                mapPanel.setZoomControlOffsetX(LayerOptionsPanel.WIDTH + ZOOM_CONTROL_LEFT_MARGIN);
            }
        });

        optionsPanel.addValueChangeHandler(new ValueChangeHandler<MapLayer>() {

            @Override
            public void onValueChange(ValueChangeEvent<MapLayer> event) {
                reportEventBus.fireChange();
            }
        });

        add(optionsPanel, new AbsoluteData(0, CONTROL_TOP_MARGIN));
    }

    protected void createLayersWidget() {
        layersWidget = new LayersWidget(dispatcher, eventBus, optionsPanel);

        // positioning is actually only set when setSize() is called below
        add(layersWidget, new AbsoluteData());
    }

    protected void createMap() {

        mapPanel = new MapEditorMapView(dispatcher, eventBus);
        mapPanel.setHeadingText(I18N.CONSTANTS.preview());
        mapPanel.setZoomControlOffsetX(ZOOM_CONTROL_LEFT_MARGIN);

        AbsoluteData layout = new AbsoluteData();
        layout.setLeft(0);
        layout.setTop(0);
        layout.setAnchorSpec("100% 100%");
        add(mapPanel, layout);
    }

    public AsyncMonitor getMapLoadingMonitor() {
        return new MaskingAsyncMonitor(mapPanel, I18N.CONSTANTS.loading());
    }

    @Override
    protected void onRender(Element parent, int pos) {
        super.onRender(parent, pos);
    }

    @Override
    public void setSize(int width, int height) {
        // right align side bar
        layout.setPosition(layersWidget, width - LayersWidget.WIDTH, CONTROL_TOP_MARGIN);

        super.setSize(width, height);
    }

    @Override
    public void bind(MapReportElement model) {
        this.mapReportElement = model;

        layersWidget.bind(model);
        mapPanel.bind(model);
    }

    @Override
    public void disconnect() {
        reportEventBus.disconnect();
        layersWidget.disconnect();
        mapPanel.disconnect();
    }

    @Override
    public MapReportElement getModel() {
        return mapReportElement;
    }

    @Override
    public Component getWidget() {
        return this;
    }

    @Override
    public List<Format> getExportFormats() {
        return Arrays.asList(Format.PowerPoint, Format.Word, Format.PDF, Format.PNG);
    }
}