Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2010-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.poller.remote.gwt.client; import java.util.HashMap; import java.util.Map; import org.gwtopenmaps.openlayers.client.Bounds; import org.gwtopenmaps.openlayers.client.Icon; import org.gwtopenmaps.openlayers.client.LonLat; import org.gwtopenmaps.openlayers.client.MapOptions; import org.gwtopenmaps.openlayers.client.MapWidget; import org.gwtopenmaps.openlayers.client.Marker; import org.gwtopenmaps.openlayers.client.Pixel; import org.gwtopenmaps.openlayers.client.Projection; import org.gwtopenmaps.openlayers.client.Size; import org.gwtopenmaps.openlayers.client.control.MousePosition; import org.gwtopenmaps.openlayers.client.control.PanZoomBar; import org.gwtopenmaps.openlayers.client.event.MapMoveListener; import org.gwtopenmaps.openlayers.client.event.MapZoomListener; import org.gwtopenmaps.openlayers.client.event.MarkerBrowserEventListener; import org.gwtopenmaps.openlayers.client.layer.Markers; import org.gwtopenmaps.openlayers.client.layer.XYZ; import org.gwtopenmaps.openlayers.client.layer.XYZOptions; import org.gwtopenmaps.openlayers.client.popup.Popup; import org.opennms.features.poller.remote.gwt.client.events.GWTMarkerClickedEvent; import org.opennms.features.poller.remote.gwt.client.events.MapPanelBoundsChangedEvent; import org.opennms.features.poller.remote.gwt.client.utils.BoundsBuilder; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.DoubleClickEvent; import com.google.gwt.event.dom.client.DoubleClickHandler; import com.google.gwt.event.logical.shared.ResizeEvent; import com.google.gwt.event.logical.shared.ResizeHandler; import com.google.gwt.event.shared.HandlerManager; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.SimplePanel; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.Widget; /** * <p>OpenLayersMapPanel class.</p> * * @author ranger * @version $Id: $ * @since 1.8.1 */ public class OpenLayersMapPanel extends Composite implements MapPanel { private class DefaultMarkerClickHandler implements MarkerBrowserEventListener { private GWTMarkerState m_markerState; public DefaultMarkerClickHandler(GWTMarkerState markerState) { setMarkerState(markerState); } public void setMarkerState(GWTMarkerState markerState) { m_markerState = markerState; } public GWTMarkerState getMarkerState() { return m_markerState; } @Override public void onBrowserEvent(final MarkerBrowserEvent markerBrowserEvent) { m_eventBus.fireEvent(new GWTMarkerClickedEvent(getMarkerState())); } } interface OpenLayersMapPanelUiBinder extends UiBinder<Widget, OpenLayersMapPanel> { } private static OpenLayersMapPanelUiBinder uiBinder = GWT.create(OpenLayersMapPanelUiBinder.class); @UiField SimplePanel m_mapHolder; private MapWidget m_mapWidget; private org.gwtopenmaps.openlayers.client.Map m_map; private Markers m_markersLayer; private Map<String, Marker> m_markers = new HashMap<String, Marker>(); private HandlerManager m_eventBus; private static final Projection PROJECTION_SPHERICAL_MERCATOR = new Projection("EPSG:900913"); private static final Projection PROJECTION_LAT_LON = new Projection("EPSG:4326"); /** * <p>Constructor for OpenLayersMapPanel.</p> * * @param eventBus a {@link com.google.gwt.event.shared.HandlerManager} object. */ public OpenLayersMapPanel(final HandlerManager eventBus) { m_eventBus = eventBus; initWidget(uiBinder.createAndBindUi(this)); initializeMap(); m_map.addMapMoveListener(new MapMoveListener() { @Override public void onMapMove(final MapMoveEvent eventObject) { m_eventBus.fireEvent(new MapPanelBoundsChangedEvent(getBounds())); } }); m_map.addMapZoomListener(new MapZoomListener() { @Override public void onMapZoom(final MapZoomEvent eventObject) { m_eventBus.fireEvent(new MapPanelBoundsChangedEvent(getBounds())); } }); } /** {@inheritDoc} */ @Override protected void onLoad() { super.onLoad(); syncMapSizeWithParent(); } /** * <p>initializeMap</p> */ private void initializeMap() { final MapOptions mo = new MapOptions(); mo.setProjection(PROJECTION_SPHERICAL_MERCATOR.getProjectionCode()); mo.setDisplayProjection(PROJECTION_LAT_LON); mo.setMaxExtent( new Bounds(-180, -90, 180, 90).transform(PROJECTION_LAT_LON, PROJECTION_SPHERICAL_MERCATOR)); m_mapWidget = new MapWidget("100%", "100%", mo); m_mapHolder.add(m_mapWidget); m_map = m_mapWidget.getMap(); m_map.addControl(new PanZoomBar()); m_map.addControl(new MousePosition()); m_map.zoomTo(2); initializeImageError(); XYZOptions xyzOptions = new XYZOptions(); xyzOptions.setSphericalMercator(true); xyzOptions.setAttribution(getAttribution()); XYZ x = new XYZ("OpenStreetMap", getLayerUrl(), xyzOptions); x.setIsBaseLayer(true); x.setIsVisible(true); m_map.addLayer(x); m_markersLayer = new Markers("Remote Pollers"); m_markersLayer.setIsVisible(true); m_markersLayer.setIsBaseLayer(false); m_map.addLayer(m_markersLayer); /* final LayerSwitcher switcher = new LayerSwitcher(); m_map.addControl(switcher); */ m_map.zoomToMaxExtent(); Window.addResizeHandler(new ResizeHandler() { @Override public void onResize(ResizeEvent event) { syncMapSizeWithParent(); } }); } private static native void initializeImageError() /*-{ $wnd.OpenLayers.Util.onImageLoadError = function() { this.style.display = ""; this.src = "images/nodata.png"; }; }-*/; /** {@inheritDoc} */ @Override public void showLocationDetails(String name, String htmlTitle, String htmlContent) { final Marker marker = getMarker(name); if (marker != null) { m_map.setCenter(marker.getLonLat()); final VerticalPanel panel = new VerticalPanel(); panel.add(new Label(htmlTitle)); panel.add(new HTML(htmlContent)); Popup p = new Popup(name, marker.getLonLat(), new Size(300, 300), panel.toString(), true); // p.setAutoSize(true); p.getJSObject().setProperty("autoSize", true); m_map.addPopupExclusive(p); } } private Marker createMarker(final GWTMarkerState marker) { final LonLat lonLat = toLonLat(marker.getLatLng()); final Icon icon = createIcon(marker); final Marker m = new Marker(lonLat, icon); m.addBrowserEventListener("click", new DefaultMarkerClickHandler(marker)); return m; } private Icon createIcon(final GWTMarkerState marker) { return new Icon(marker.getImageURL(), new Size(32, 32), new Pixel(-16, -32)); } /** * <p>getBounds</p> * * @return a {@link org.opennms.features.poller.remote.gwt.client.GWTBounds} object. */ @Override public GWTBounds getBounds() { try { return toGWTBounds(m_map.getExtent()); } catch (final Exception e) { return new GWTBounds(-180, -90, 180, 90); } } /** {@inheritDoc} */ @Override public void setBounds(final GWTBounds b) { m_map.zoomToExtent(toBounds(b)); } private static LonLat toLonLat(final GWTLatLng latLng) { final LonLat ll = new LonLat(latLng.getLongitude(), latLng.getLatitude()); ll.transform(PROJECTION_LAT_LON.getProjectionCode(), PROJECTION_SPHERICAL_MERCATOR.getProjectionCode()); return ll; } private static GWTBounds toGWTBounds(final Bounds fromBounds) { if (fromBounds == null) { return new GWTBounds(-180, -90, 180, 90); } final Bounds bounds = fromBounds.transform(PROJECTION_SPHERICAL_MERCATOR, PROJECTION_LAT_LON); BoundsBuilder bldr = new BoundsBuilder(); bldr.extend(Math.max(-90, bounds.getLowerLeftY()), Math.max(-180, bounds.getLowerLeftX())); bldr.extend(Math.min(90, bounds.getUpperRightY()), Math.min(180, bounds.getUpperRightX())); return bldr.getBounds(); } private static Bounds toBounds(final GWTBounds bounds) { Bounds b = null; if (bounds == null) { b = new Bounds(-180, -90, 180, 90); } else { final GWTLatLng nec = bounds.getNorthEastCorner(); final GWTLatLng swc = bounds.getSouthWestCorner(); b = new Bounds(swc.getLongitude(), swc.getLatitude(), nec.getLongitude(), nec.getLatitude()); } return b.transform(PROJECTION_LAT_LON, PROJECTION_SPHERICAL_MERCATOR); } private void syncMapSizeWithParent() { m_map.updateSize(); } /** {@inheritDoc} */ @Override public void placeMarker(final GWTMarkerState marker) { Marker m = getMarker(marker.getName()); if (m == null) { m = createMarker(marker); m_markers.put(marker.getName(), m); } updateMarker(m, marker); } private void updateMarker(final Marker m, final GWTMarkerState marker) { if (marker.isVisible()) { m.setImageUrl(marker.getImageURL()); m_markersLayer.addMarker(m); } else { m_markersLayer.removeMarker(m); } } private Marker getMarker(final String name) { return m_markers.get(name); } private native String getLayerUrl() /*-{ return $wnd.openlayersUrl; }-*/; private native String getAttribution() /*-{ return $wnd.openlayersAttribution; }-*/; /** * <p>getWidget</p> * * @return a {@link com.google.gwt.user.client.ui.Widget} object. */ @Override public Widget getWidget() { return this; } /** {@inheritDoc} */ public HandlerRegistration addDoubleClickHandler(DoubleClickHandler handler) { return addDomHandler(handler, DoubleClickEvent.getType()); } /** {@inheritDoc} */ public HandlerRegistration addClickHandler(ClickHandler handler) { return addDomHandler(handler, ClickEvent.getType()); } }