Java tutorial
/* * Copyright 2012 Nick Kerr * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.nitrous.gwt.earth.client.demo; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.dom.client.Style.Unit; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.DockLayoutPanel; 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.RootLayoutPanel; import com.google.gwt.user.client.ui.VerticalPanel; import com.nitrous.gwt.earth.client.api.GELayerId; import com.nitrous.gwt.earth.client.api.GEPlugin; import com.nitrous.gwt.earth.client.api.GEPluginReadyListener; import com.nitrous.gwt.earth.client.api.GEVisibility; import com.nitrous.gwt.earth.client.api.GoogleEarth; import com.nitrous.gwt.earth.client.api.GoogleEarthWidget; import com.nitrous.gwt.earth.client.api.KmlUnits; /** * A GWT implementation of the demo found <a href="http://code.google.com/apis/ajax/playground/#show/hide_navigation_controls">here</a>. * * @author nick * */ public class NavigationControlDemo implements EntryPoint { private GoogleEarthWidget earth; public void onModuleLoad() { // Load the Earth API GoogleEarth.loadApi(new Runnable() { @Override public void run() { // start the application onApiLoaded(); } }); } /** * The Google earth API has loaded, start the application */ private void onApiLoaded() { // construct the UI widget earth = new GoogleEarthWidget(); // register a listener to be notified when the earth plug-in has loaded earth.addPluginReadyListener(new GEPluginReadyListener() { public void pluginReady(GEPlugin ge) { // show map content once the plugin has loaded loadMapContent(); } public void pluginInitFailure() { // failure! Window.alert("Failed to initialize Google Earth Plug-in"); } }); Button showButton = new Button("Show"); showButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { visShow(); } }); Button autoShowButton = new Button("Auto Show/Hide"); autoShowButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { visAuto(); } }); Button hideButton = new Button("Hide"); hideButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { visHide(); } }); Button topLeftButton = new Button("TL"); topLeftButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { posTopLeft(); } }); Button topRightButton = new Button("TR"); topRightButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { posTopRight(); } }); Button bottomLeftButton = new Button("BL"); bottomLeftButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { posBottomLeft(); } }); Button bottomRightButton = new Button("BR"); bottomRightButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { posBottomRight(); } }); VerticalPanel topPanel = new VerticalPanel(); topPanel.setWidth("100%"); topPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); HorizontalPanel navLabelPanel = new HorizontalPanel(); navLabelPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); navLabelPanel.add(new Label("Navigation Control Visibility")); topPanel.add(navLabelPanel); HorizontalPanel navButtonPanel = new HorizontalPanel(); navButtonPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); navButtonPanel.add(showButton); navButtonPanel.add(autoShowButton); navButtonPanel.add(hideButton); topPanel.add(navButtonPanel); HorizontalPanel positionLabelPanel = new HorizontalPanel(); positionLabelPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); positionLabelPanel.add(new Label("Position")); topPanel.add(positionLabelPanel); HorizontalPanel topPositionButtonPanel = new HorizontalPanel(); topPositionButtonPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); topPositionButtonPanel.add(topLeftButton); topPositionButtonPanel.add(topRightButton); topPanel.add(topPositionButtonPanel); HorizontalPanel bottomPositionButtonPanel = new HorizontalPanel(); bottomPositionButtonPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); bottomPositionButtonPanel.add(bottomLeftButton); bottomPositionButtonPanel.add(bottomRightButton); topPanel.add(bottomPositionButtonPanel); DockLayoutPanel layout = new DockLayoutPanel(Unit.PX); layout.addNorth(topPanel, 135D); layout.add(earth); RootLayoutPanel.get().add(layout); // begin loading the Google Earth Plug-in earth.init(); } /** * Display content on the map */ private void loadMapContent() { // The GEPlugin is the core class and is a great place to start browsing // the API GEPlugin ge = earth.getGEPlugin(); ge.getWindow().setVisibility(true); // add a navigation control ge.getNavigationControl().setVisibility(GEVisibility.VISIBILITY_AUTO); // add some layers ge.enableLayer(GELayerId.LAYER_BORDERS, true); ge.enableLayer(GELayerId.LAYER_ROADS, true); } // visibility private void visShow() { earth.getGEPlugin().getNavigationControl().setVisibility(GEVisibility.VISIBILITY_SHOW); } private void visAuto() { earth.getGEPlugin().getNavigationControl().setVisibility(GEVisibility.VISIBILITY_AUTO); } private void visHide() { earth.getGEPlugin().getNavigationControl().setVisibility(GEVisibility.VISIBILITY_HIDE); } // position private void posTopLeft() { earth.getGEPlugin().getNavigationControl().getScreenXY().setXUnits(KmlUnits.UNITS_PIXELS); earth.getGEPlugin().getNavigationControl().getScreenXY().setYUnits(KmlUnits.UNITS_INSET_PIXELS); } private void posTopRight() { earth.getGEPlugin().getNavigationControl().getScreenXY().setXUnits(KmlUnits.UNITS_INSET_PIXELS); earth.getGEPlugin().getNavigationControl().getScreenXY().setYUnits(KmlUnits.UNITS_INSET_PIXELS); } private void posBottomLeft() { earth.getGEPlugin().getNavigationControl().getScreenXY().setXUnits(KmlUnits.UNITS_PIXELS); earth.getGEPlugin().getNavigationControl().getScreenXY().setYUnits(KmlUnits.UNITS_PIXELS); } private void posBottomRight() { earth.getGEPlugin().getNavigationControl().getScreenXY().setXUnits(KmlUnits.UNITS_INSET_PIXELS); earth.getGEPlugin().getNavigationControl().getScreenXY().setYUnits(KmlUnits.UNITS_PIXELS); } }