Completely rewritten project

28 files changed, 1719 insertions, 0 deletions

diff --git a/src/org/traccar/web/Traccar.gwt.xml b/src/org/traccar/web/Traccar.gwt.xml
new file mode 100644
index 0000000..0081372
--- /dev/null
+++ b/src/org/traccar/web/Traccar.gwt.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.5.0//EN"
+  "http://google-web-toolkit.googlecode.com/svn/tags/2.5.0/distro-source/core/src/gwt-module.dtd">
+
+<module rename-to='traccar'>
+
+  <inherits name='com.google.gwt.user.User'/>
+  <inherits name='com.sencha.gxt.ui.GXT'/>
+  <inherits name='org.gwtopenmaps.openlayers.OpenLayers' />
+
+  <entry-point class='org.traccar.web.client.Traccar'/>
+
+  <source path='client'/>
+  <source path='shared'/>
+
+</module>
diff --git a/src/org/traccar/web/client/Application.java b/src/org/traccar/web/client/Application.java
new file mode 100644
index 0000000..9b14d42
--- /dev/null
+++ b/src/org/traccar/web/client/Application.java
@@ -0,0 +1,98 @@
+package org.traccar.web.client;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.traccar.web.client.controller.ArchiveController;
+import org.traccar.web.client.controller.DeviceController;
+import org.traccar.web.client.controller.MapController;
+import org.traccar.web.client.model.DataService;
+import org.traccar.web.client.model.DataServiceAsync;
+import org.traccar.web.client.view.ApplicationView;
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.user.client.ui.RootPanel;
+
+public class Application {
+
+    private static final DataServiceAsync dataService = GWT.create(DataService.class);
+
+    public static DataServiceAsync getDataService() {
+        return dataService;
+    }
+
+    private final DeviceController deviceController;
+    private final MapController mapController;
+    private final ArchiveController archiveController;
+
+    private ApplicationView view;
+
+    public Application() {
+        deviceController = new DeviceController(deviceHandler);
+        mapController = new MapController();
+        archiveController = new ArchiveController(archiveHanlder);
+
+        view = new ApplicationView(
+                deviceController.getView(), mapController.getView(), archiveController.getView());
+    }
+
+    public void run() {
+        RootPanel.get().add(view);
+
+        deviceController.run();
+        mapController.run();
+        archiveController.run();
+    }
+
+    private Map<Long, Device> devices = new HashMap<Long, Device>();
+
+    private DeviceController.DeviceHandler deviceHandler = new DeviceController.DeviceHandler() {
+
+        @Override
+        public void onLoad(List<Device> devices) {
+            Application.this.devices.clear();
+            for (Device device : devices) {
+                Application.this.devices.put(device.getId(), device);
+            }
+        }
+
+        @Override
+        public void onSelected(Device device) {
+            mapController.select(device);
+        }
+
+        @Override
+        public void onAdd(Device device) {
+            devices.put(device.getId(), device);
+            archiveController.updateDevices(devices.values());
+            mapController.update();
+        }
+
+        @Override
+        public void onUpdate(Device device) {
+            devices.put(device.getId(), device);
+            archiveController.updateDevices(devices.values());
+        }
+
+        @Override
+        public void onRemove(Device device) {
+            devices.remove(device.getId());
+            archiveController.updateDevices(devices.values());
+            mapController.update();
+        }
+
+    };
+
+    private ArchiveController.ArchiveHandler archiveHanlder = new ArchiveController.ArchiveHandler() {
+
+        @Override
+        public void onSelected(Position position) {
+            // TODO select something on map?
+        }
+
+    };
+
+}
diff --git a/src/org/traccar/web/client/Traccar.java b/src/org/traccar/web/client/Traccar.java
new file mode 100644
index 0000000..5d56d40
--- /dev/null
+++ b/src/org/traccar/web/client/Traccar.java
@@ -0,0 +1,19 @@
+package org.traccar.web.client;
+
+import org.traccar.web.client.controller.LoginController;
+
+import com.google.gwt.core.client.EntryPoint;
+
+public class Traccar implements EntryPoint, LoginController.LoginHandler {
+
+    @Override
+    public void onModuleLoad() {
+        new LoginController().login(this);
+    }
+
+    @Override
+    public void onLogin() {
+        new Application().run();
+    }
+
+}
diff --git a/src/org/traccar/web/client/controller/ArchiveController.java b/src/org/traccar/web/client/controller/ArchiveController.java
new file mode 100644
index 0000000..598a744
--- /dev/null
+++ b/src/org/traccar/web/client/controller/ArchiveController.java
@@ -0,0 +1,44 @@
+package org.traccar.web.client.controller;
+
+import java.util.Collection;
+
+import org.traccar.web.client.view.ArchiveView;
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+
+import com.sencha.gxt.widget.core.client.ContentPanel;
+
+public class ArchiveController implements ContentController, ArchiveView.ArchiveHandler {
+
+    public interface ArchiveHandler {
+        public void onSelected(Position position);
+    }
+
+    private ArchiveHandler archiveHandler;
+
+    private ArchiveView archiveView;
+
+    public ArchiveController(ArchiveHandler archiveHandler) {
+        this.archiveHandler = archiveHandler;
+        archiveView = new ArchiveView(this);
+    }
+
+    @Override
+    public ContentPanel getView() {
+        return archiveView.getView();
+    }
+
+    @Override
+    public void run() {
+    }
+
+    public void updateDevices(Collection<Device> devices) {
+
+    }
+
+    @Override
+    public void onSelected(Position position) {
+        archiveHandler.onSelected(position);
+    }
+
+}
diff --git a/src/org/traccar/web/client/controller/ContentController.java b/src/org/traccar/web/client/controller/ContentController.java
new file mode 100644
index 0000000..7e8d677
--- /dev/null
+++ b/src/org/traccar/web/client/controller/ContentController.java
@@ -0,0 +1,11 @@
+package org.traccar.web.client.controller;
+
+import com.sencha.gxt.widget.core.client.ContentPanel;
+
+public interface ContentController {
+
+    public ContentPanel getView();
+
+    public void run();
+
+}
diff --git a/src/org/traccar/web/client/controller/DeviceController.java b/src/org/traccar/web/client/controller/DeviceController.java
new file mode 100644
index 0000000..b24c205
--- /dev/null
+++ b/src/org/traccar/web/client/controller/DeviceController.java
@@ -0,0 +1,109 @@
+package org.traccar.web.client.controller;
+
+import java.util.List;
+
+import org.traccar.web.client.Application;
+import org.traccar.web.client.model.BaseAsyncCallback;
+import org.traccar.web.client.view.DeviceDialog;
+import org.traccar.web.client.view.DeviceView;
+import org.traccar.web.shared.model.Device;
+
+import com.sencha.gxt.widget.core.client.ContentPanel;
+import com.sencha.gxt.widget.core.client.Dialog.PredefinedButton;
+import com.sencha.gxt.widget.core.client.box.ConfirmMessageBox;
+import com.sencha.gxt.widget.core.client.event.HideEvent;
+import com.sencha.gxt.widget.core.client.event.HideEvent.HideHandler;
+
+public class DeviceController implements ContentController, DeviceView.DeviceHandler {
+
+    public interface DeviceHandler {
+        public void onLoad(List<Device> devices);
+        public void onSelected(Device device);
+        public void onAdd(Device device);
+        public void onUpdate(Device device);
+        public void onRemove(Device device);
+    }
+
+    private DeviceHandler deviceHandler;
+
+    private DeviceView deviceView;
+
+    public DeviceController(DeviceHandler deviceHandler) {
+        this.deviceHandler = deviceHandler;
+        deviceView = new DeviceView(this);
+    }
+
+    @Override
+    public ContentPanel getView() {
+        return deviceView.getView();
+    }
+
+    @Override
+    public void run() {
+        Application.getDataService().getDevices(new BaseAsyncCallback<List<Device>>() {
+            @Override
+            public void onSuccess(List<Device> result) {
+                deviceView.load(result);
+                deviceHandler.onLoad(result);
+            }
+        });
+    }
+
+    @Override
+    public void onSelected(Device device) {
+        deviceHandler.onSelected(device);
+    }
+
+    @Override
+    public void onAdd() {
+        new DeviceDialog(new Device(), new DeviceDialog.DeviceHandler() {
+            @Override
+            public void onSave(Device device) {
+                Application.getDataService().addDevice(device, new BaseAsyncCallback<Device>() {
+                    @Override
+                    public void onSuccess(Device result) {
+                        deviceView.add(result);
+                        deviceHandler.onAdd(result);
+                    }
+                });
+            }
+        }).show();
+    }
+
+    @Override
+    public void onEdit(Device device) {
+        new DeviceDialog(new Device(device), new DeviceDialog.DeviceHandler() {
+            @Override
+            public void onSave(Device device) {
+                Application.getDataService().updateDevice(device, new BaseAsyncCallback<Device>() {
+                    @Override
+                    public void onSuccess(Device result) {
+                        deviceView.update(result);
+                        deviceHandler.onUpdate(result);
+                    }
+                });
+            }
+        }).show();
+    }
+
+    @Override
+    public void onRemove(final Device device) {
+        final ConfirmMessageBox dialog = new ConfirmMessageBox("Confirm", "Are you sure you want remove device?");
+        dialog.addHideHandler(new HideHandler() {
+            @Override
+            public void onHide(HideEvent event) {
+                if (dialog.getHideButton() == dialog.getButtonById(PredefinedButton.YES.name())) {
+                    Application.getDataService().removeDevice(device, new BaseAsyncCallback<Device>() {
+                        @Override
+                        public void onSuccess(Device result) {
+                            deviceView.remove(device);
+                            deviceHandler.onRemove(device);
+                        }
+                    });
+                }
+            }
+        });
+        dialog.show();
+    }
+
+}
diff --git a/src/org/traccar/web/client/controller/LoginController.java b/src/org/traccar/web/client/controller/LoginController.java
new file mode 100644
index 0000000..ceda85c
--- /dev/null
+++ b/src/org/traccar/web/client/controller/LoginController.java
@@ -0,0 +1,81 @@
+package org.traccar.web.client.controller;
+
+import org.traccar.web.client.Application;
+import org.traccar.web.client.model.BaseAsyncCallback;
+import org.traccar.web.client.view.LoginDialog;
+
+import com.sencha.gxt.widget.core.client.box.AlertMessageBox;
+
+public class LoginController implements LoginDialog.LoginHandler {
+
+    private LoginDialog dialog;
+
+    public interface LoginHandler {
+        public void onLogin();
+    }
+
+    private LoginHandler loginHandler;
+
+    public void login(final LoginHandler loginHandler) {
+        this.loginHandler = loginHandler;
+
+        Application.getDataService().authenticated(new BaseAsyncCallback<Boolean>() {
+            @Override
+            public void onSuccess(Boolean result) {
+                if (result) {
+                    loginHandler.onLogin();
+                } else {
+                    dialog = new LoginDialog(LoginController.this);
+                    dialog.show();
+                }
+            }
+        });
+    }
+
+    private boolean validate(String login, String password) {
+        if (login == null || login.isEmpty() || password == null || password.isEmpty()) {
+            new AlertMessageBox("Error", "User name and password must not be empty").show();
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void onLogin(String login, String password) {
+        if (validate(login, password)) {
+            Application.getDataService().authenticate(login, password, new BaseAsyncCallback<Boolean>() {
+                @Override
+                public void onSuccess(Boolean result) {
+                    if (result) {
+                        if (loginHandler != null) {
+                            dialog.hide();
+                            loginHandler.onLogin();
+                        }
+                    } else {
+                        new AlertMessageBox("Error", "User name or password is invalid").show();
+                    }
+                }
+            });
+        }
+    }
+
+    @Override
+    public void onRegister(String login, String password) {
+        if (validate(login, password)) {
+            Application.getDataService().register(login, password, new BaseAsyncCallback<Boolean>() {
+                @Override
+                public void onSuccess(Boolean result) {
+                    if (result) {
+                        if (loginHandler != null) {
+                            dialog.hide();
+                            loginHandler.onLogin();
+                        }
+                    } else {
+                        new AlertMessageBox("Error", "Registration error").show();
+                    }
+                }
+            });
+        }
+    }
+
+}
diff --git a/src/org/traccar/web/client/controller/MapController.java b/src/org/traccar/web/client/controller/MapController.java
new file mode 100644
index 0000000..5a53cf2
--- /dev/null
+++ b/src/org/traccar/web/client/controller/MapController.java
@@ -0,0 +1,56 @@
+package org.traccar.web.client.controller;
+
+import org.traccar.web.client.view.MapView;
+import org.traccar.web.shared.model.Device;
+
+import com.google.gwt.user.client.Timer;
+import com.sencha.gxt.widget.core.client.ContentPanel;
+
+public class MapController implements ContentController {
+
+    private static final int UPDATE_INTERVAL = 10000;
+
+    private MapView mapView;
+
+    public MapController() {
+        mapView = new MapView();
+    }
+
+    @Override
+    public ContentPanel getView() {
+        return mapView.getView();
+    }
+
+    private Timer updateTimer;
+
+    @Override
+    public void run() {
+        updateTimer = new Timer() {
+            @Override
+            public void run() {
+                update();
+            }
+        };
+        update();
+    }
+
+    public void update() {
+        updateTimer.cancel();
+        /*Application.getDataService().getLatestPositions(new AsyncCallback<List<Position>>() {
+            @Override
+            public void onSuccess(List<Position> result) {
+                mapView.showPositions(result);
+                updateTimer.schedule(UPDATE_INTERVAL);
+            }
+            @Override
+            public void onFailure(Throwable caught) {
+                updateTimer.schedule(UPDATE_INTERVAL);
+            }
+        });*/
+    }
+
+    public void select(Device device) {
+        mapView.select(device, true);
+    }
+
+}
diff --git a/src/org/traccar/web/client/model/BaseAsyncCallback.java b/src/org/traccar/web/client/model/BaseAsyncCallback.java
new file mode 100644
index 0000000..2cc8741
--- /dev/null
+++ b/src/org/traccar/web/client/model/BaseAsyncCallback.java
@@ -0,0 +1,17 @@
+package org.traccar.web.client.model;
+
+import com.google.gwt.user.client.rpc.AsyncCallback;
+import com.sencha.gxt.widget.core.client.box.AlertMessageBox;
+
+public class BaseAsyncCallback<T> implements AsyncCallback<T> {
+
+    @Override
+    public void onFailure(Throwable caught) {
+        new AlertMessageBox("Error", "Remote procedure call error").show();
+    }
+
+    @Override
+    public void onSuccess(T result) {
+    }
+
+}
diff --git a/src/org/traccar/web/client/model/DataService.java b/src/org/traccar/web/client/model/DataService.java
new file mode 100644
index 0000000..d8d7152
--- /dev/null
+++ b/src/org/traccar/web/client/model/DataService.java
@@ -0,0 +1,33 @@
+package org.traccar.web.client.model;
+
+import java.util.Date;
+import java.util.List;
+
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+
+import com.google.gwt.user.client.rpc.RemoteService;
+import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
+
+@RemoteServiceRelativePath("dataService")
+public interface DataService extends RemoteService {
+
+    boolean authenticated();
+
+    boolean authenticate(String login, String password);
+
+    boolean register(String login, String password);
+
+    List<Device> getDevices();
+
+    Device addDevice(Device device);
+
+    Device updateDevice(Device device);
+
+    Device removeDevice(Device device);
+
+    List<Position> getPositions(Device device, Date from, Date to);
+
+    List<Position> getLatestPositions();
+
+}
diff --git a/src/org/traccar/web/client/model/DataServiceAsync.java b/src/org/traccar/web/client/model/DataServiceAsync.java
new file mode 100644
index 0000000..357beb5
--- /dev/null
+++ b/src/org/traccar/web/client/model/DataServiceAsync.java
@@ -0,0 +1,31 @@
+package org.traccar.web.client.model;
+
+import java.util.Date;
+import java.util.List;
+
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+
+import com.google.gwt.user.client.rpc.AsyncCallback;
+
+public interface DataServiceAsync {
+
+    void authenticate(String login, String password, AsyncCallback<Boolean> callback);
+
+    void authenticated(AsyncCallback<Boolean> callback);
+
+    void register(String login, String password, AsyncCallback<Boolean> callback);
+
+    void getDevices(AsyncCallback<List<Device>> callback);
+
+    void addDevice(Device device, AsyncCallback<Device> callback);
+
+    void updateDevice(Device device, AsyncCallback<Device> callback);
+
+    void removeDevice(Device device, AsyncCallback<Device> callback);
+
+    void getLatestPositions(AsyncCallback<List<Position>> callback);
+
+    void getPositions(Device device, Date from, Date to, AsyncCallback<List<Position>> callback);
+
+}
diff --git a/src/org/traccar/web/client/model/DeviceProperties.java b/src/org/traccar/web/client/model/DeviceProperties.java
new file mode 100644
index 0000000..2c56ff6
--- /dev/null
+++ b/src/org/traccar/web/client/model/DeviceProperties.java
@@ -0,0 +1,17 @@
+package org.traccar.web.client.model;
+
+import org.traccar.web.shared.model.Device;
+
+import com.sencha.gxt.core.client.ValueProvider;
+import com.sencha.gxt.data.shared.ModelKeyProvider;
+import com.sencha.gxt.data.shared.PropertyAccess;
+
+public interface DeviceProperties extends PropertyAccess<Device> {
+
+    ModelKeyProvider<Device> id();
+
+    ValueProvider<Device, String> uniqueId();
+
+    ValueProvider<Device, String> name();
+
+}
diff --git a/src/org/traccar/web/client/model/PositionProperties.java b/src/org/traccar/web/client/model/PositionProperties.java
new file mode 100644
index 0000000..111614a
--- /dev/null
+++ b/src/org/traccar/web/client/model/PositionProperties.java
@@ -0,0 +1,33 @@
+package org.traccar.web.client.model;
+
+import java.util.Date;
+
+import org.traccar.web.shared.model.Position;
+
+import com.sencha.gxt.core.client.ValueProvider;
+import com.sencha.gxt.data.shared.ModelKeyProvider;
+import com.sencha.gxt.data.shared.PropertyAccess;
+
+public interface PositionProperties extends PropertyAccess<Position> {
+
+    ModelKeyProvider<Position> id();
+
+    ValueProvider<Position, Date> time();
+
+    ValueProvider<Position, Boolean> valid();
+
+    ValueProvider<Position, Double> latitude();
+
+    ValueProvider<Position, Double> longitude();
+
+    ValueProvider<Position, Double> altitude();
+
+    ValueProvider<Position, Double> speed();
+
+    ValueProvider<Position, Double> course();
+
+    ValueProvider<Position, Double> power();
+
+    ValueProvider<Position, String> address();
+
+}
diff --git a/src/org/traccar/web/client/view/ApplicationView.java b/src/org/traccar/web/client/view/ApplicationView.java
new file mode 100644
index 0000000..bff8854
--- /dev/null
+++ b/src/org/traccar/web/client/view/ApplicationView.java
@@ -0,0 +1,33 @@
+package org.traccar.web.client.view;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.Widget;
+import com.sencha.gxt.widget.core.client.ContentPanel;
+
+public class ApplicationView extends Composite {
+
+    private static ApplicationViewUiBinder uiBinder = GWT.create(ApplicationViewUiBinder.class);
+
+    interface ApplicationViewUiBinder extends UiBinder<Widget, ApplicationView> {
+    }
+
+    @UiField(provided = true)
+    ContentPanel devicePanel;
+
+    @UiField(provided = true)
+    ContentPanel mapPanel;
+
+    @UiField(provided = true)
+    ContentPanel archivePanel;
+
+    public ApplicationView(ContentPanel deviceView, ContentPanel mapView, ContentPanel archiveView) {
+        devicePanel = deviceView;
+        mapPanel = mapView;
+        archivePanel = archiveView;
+        initWidget(uiBinder.createAndBindUi(this));
+    }
+
+}
diff --git a/src/org/traccar/web/client/view/ApplicationView.ui.xml b/src/org/traccar/web/client/view/ApplicationView.ui.xml
new file mode 100644
index 0000000..2faae1e
--- /dev/null
+++ b/src/org/traccar/web/client/view/ApplicationView.ui.xml
@@ -0,0 +1,42 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder
+    xmlns:ui="urn:ui:com.google.gwt.uibinder"
+    xmlns:g="urn:import:com.google.gwt.user.client.ui"
+    xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
+    xmlns:gxt="urn:import:com.sencha.gxt.widget.core.client">
+
+  <ui:with type="com.sencha.gxt.core.client.util.Margins" field="westMargins">
+    <ui:attributes top="5" right="5" bottom="0" left="5" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.core.client.util.Margins" field="centerMargins">
+    <ui:attributes top="5" right="5" bottom="0" left="0" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.core.client.util.Margins" field="southMargins">
+    <ui:attributes top="5" right="5" bottom="5" left="5" />
+  </ui:with>
+ 
+  <ui:with type="com.sencha.gxt.widget.core.client.container.BorderLayoutContainer.BorderLayoutData" field="westData">
+    <ui:attributes size="0.15" maxSize="2147483647" margins="{westMargins}" split="true" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.widget.core.client.container.MarginData" field="centerData">
+    <ui:attributes margins="{centerMargins}" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.widget.core.client.container.BorderLayoutContainer.BorderLayoutData" field="southData">
+    <ui:attributes size="0.25" maxSize="2147483647" margins="{southMargins}" split="true" />
+  </ui:with>
+
+  <container:Viewport>
+    <container:BorderLayoutContainer>
+      <container:west layoutData="{westData}">
+        <gxt:ContentPanel ui:field="devicePanel" />
+      </container:west>
+      <container:center layoutData="{centerData}">
+        <gxt:ContentPanel ui:field="mapPanel" />
+      </container:center>
+      <container:south layoutData="{southData}">
+        <gxt:ContentPanel ui:field="archivePanel" />
+      </container:south>
+    </container:BorderLayoutContainer>
+  </container:Viewport>
+
+</ui:UiBinder>
diff --git a/src/org/traccar/web/client/view/ArchiveView.java b/src/org/traccar/web/client/view/ArchiveView.java
new file mode 100644
index 0000000..79621ba
--- /dev/null
+++ b/src/org/traccar/web/client/view/ArchiveView.java
@@ -0,0 +1,79 @@
+package org.traccar.web.client.view;
+
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.traccar.web.client.model.PositionProperties;
+import org.traccar.web.shared.model.Position;
+
+import com.google.gwt.cell.client.DateCell;
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.i18n.client.DateTimeFormat;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.Widget;
+import com.sencha.gxt.data.shared.ListStore;
+import com.sencha.gxt.widget.core.client.ContentPanel;
+import com.sencha.gxt.widget.core.client.grid.ColumnConfig;
+import com.sencha.gxt.widget.core.client.grid.ColumnModel;
+import com.sencha.gxt.widget.core.client.grid.Grid;
+
+public class ArchiveView extends Composite {
+
+    private static ArchiveViewUiBinder uiBinder = GWT.create(ArchiveViewUiBinder.class);
+
+    interface ArchiveViewUiBinder extends UiBinder<Widget, ArchiveView> {
+    }
+
+    public interface ArchiveHandler {
+        public void onSelected(Position position);
+    }
+
+    private ArchiveHandler archiveHandler;
+
+    @UiField
+    ContentPanel contentPanel;
+
+    public ContentPanel getView() {
+        return contentPanel;
+    }
+
+    @UiField(provided = true)
+    ColumnModel<Position> columnModel;
+
+    @UiField(provided = true)
+    ListStore<Position> store;
+
+    @UiField
+    Grid<Position> grid;
+
+    public ArchiveView(ArchiveHandler archiveHandler) {
+        this.archiveHandler = archiveHandler;
+
+        PositionProperties positionProperties = GWT.create(PositionProperties.class);
+
+        List<ColumnConfig<Position, ?>> columnConfigList = new LinkedList<ColumnConfig<Position, ?>>();
+
+        columnConfigList.add(new ColumnConfig<Position, Boolean>(positionProperties.valid(), 0, "Valid"));
+
+        ColumnConfig<Position, Date> columnConfig = new ColumnConfig<Position, Date>(positionProperties.time(), 0, "Time");
+        columnConfig.setCell(new DateCell(DateTimeFormat.getFormat("yyyy-MM-dd HH:mm:ss")));
+        columnConfigList.add(columnConfig);
+
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.latitude(), 0, "Latitude"));
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.longitude(), 0, "Longitude"));
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.altitude(), 0, "Altitude"));
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.speed(), 0, "Speed"));
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.course(), 0, "Course"));
+        columnConfigList.add(new ColumnConfig<Position, Double>(positionProperties.power(), 0, "Power"));
+
+        columnModel = new ColumnModel<Position>(columnConfigList);
+
+        store = new ListStore<Position>(positionProperties.id());
+
+        uiBinder.createAndBindUi(this);
+    }
+
+}
diff --git a/src/org/traccar/web/client/view/ArchiveView.ui.xml b/src/org/traccar/web/client/view/ArchiveView.ui.xml
new file mode 100644
index 0000000..370eb02
--- /dev/null
+++ b/src/org/traccar/web/client/view/ArchiveView.ui.xml
@@ -0,0 +1,60 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder
+    xmlns:ui="urn:ui:com.google.gwt.uibinder"
+    xmlns:g="urn:import:com.google.gwt.user.client.ui"
+    xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
+    xmlns:gxt="urn:import:com.sencha.gxt.widget.core.client"
+    xmlns:toolbar="urn:import:com.sencha.gxt.widget.core.client.toolbar"
+    xmlns:grid="urn:import:com.sencha.gxt.widget.core.client.grid"
+    xmlns:button="urn:import:com.sencha.gxt.widget.core.client.button"
+    xmlns:form="urn:import:com.sencha.gxt.widget.core.client.form">
+
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="toolBarRowData">
+    <ui:attributes width="1" height="-1" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="layoutData">
+    <ui:attributes width="1" height="1" />
+  </ui:with>
+
+  <ui:with type="com.sencha.gxt.data.shared.ListStore" field="store" />
+  <ui:with type="com.sencha.gxt.widget.core.client.grid.ColumnModel" field="columnModel" />
+
+  <ui:with type="com.sencha.gxt.widget.core.client.grid.GridView" field="view">
+    <ui:attributes stripeRows="true" autoFill="true" />
+  </ui:with>
+
+  <gxt:ContentPanel ui:field="contentPanel" headingText="Archive">
+    <container:VerticalLayoutContainer>
+
+      <container:child layoutData="{toolBarRowData}">
+        <toolbar:ToolBar>
+
+          <toolbar:LabelToolItem label="Device:" />
+          <form:TimeField /> <!-- put combobox here -->
+          <toolbar:SeparatorToolItem />
+
+          <toolbar:LabelToolItem label="From:" />
+          <form:DateField width="125" />
+          <toolbar:LabelToolItem width="5" />
+          <form:TimeField width="75" />
+          <toolbar:SeparatorToolItem />
+
+          <toolbar:LabelToolItem label="To:" />
+          <form:DateField width="125" />
+          <toolbar:LabelToolItem width="5" />
+          <form:TimeField width="75" />
+          <toolbar:SeparatorToolItem />
+          
+          <button:TextButton ui:field="loadButton" text="Load" />
+        
+        </toolbar:ToolBar>
+      </container:child>
+      
+      <container:child layoutData="{layoutData}">
+        <grid:Grid ui:field="grid" store="{store}" cm="{columnModel}" view="{view}" />
+      </container:child>
+
+    </container:VerticalLayoutContainer>
+  </gxt:ContentPanel>
+
+</ui:UiBinder>
diff --git a/src/org/traccar/web/client/view/DeviceDialog.java b/src/org/traccar/web/client/view/DeviceDialog.java
new file mode 100644
index 0000000..891dd4e
--- /dev/null
+++ b/src/org/traccar/web/client/view/DeviceDialog.java
@@ -0,0 +1,69 @@
+package org.traccar.web.client.view;
+
+import org.traccar.web.shared.model.Device;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.editor.client.Editor;
+import com.google.gwt.editor.client.SimpleBeanEditorDriver;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.uibinder.client.UiHandler;
+import com.google.gwt.user.client.ui.Widget;
+import com.sencha.gxt.widget.core.client.Window;
+import com.sencha.gxt.widget.core.client.event.SelectEvent;
+import com.sencha.gxt.widget.core.client.form.TextField;
+
+public class DeviceDialog implements Editor<Device> {
+
+    private static DeviceDialogUiBinder uiBinder = GWT.create(DeviceDialogUiBinder.class);
+
+    interface DeviceDialogUiBinder extends UiBinder<Widget, DeviceDialog> {
+    }
+
+    private DeviceDriver driver = GWT.create(DeviceDriver.class);
+
+    interface DeviceDriver extends SimpleBeanEditorDriver<Device, DeviceDialog> {
+    }
+
+    public interface DeviceHandler {
+        public void onSave(Device device);
+    }
+
+    private DeviceHandler deviceHandler;
+
+    @UiField
+    Window window;
+
+    @UiField
+    TextField name;
+
+    @UiField
+    TextField uniqueId;
+
+    public DeviceDialog(Device device, DeviceHandler deviceHandler) {
+        this.deviceHandler = deviceHandler;
+        uiBinder.createAndBindUi(this);
+        driver.initialize(this);
+        driver.edit(device);
+    }
+
+    public void show() {
+        window.show();
+    }
+
+    public void hide() {
+        window.hide();
+    }
+
+    @UiHandler("saveButton")
+    public void onLoginClicked(SelectEvent event) {
+        window.hide();
+        deviceHandler.onSave(driver.flush());
+    }
+
+    @UiHandler("cancelButton")
+    public void onRegisterClicked(SelectEvent event) {
+        window.hide();
+    }
+
+}
diff --git a/src/org/traccar/web/client/view/DeviceDialog.ui.xml b/src/org/traccar/web/client/view/DeviceDialog.ui.xml
new file mode 100644
index 0000000..4f7ccc5
--- /dev/null
+++ b/src/org/traccar/web/client/view/DeviceDialog.ui.xml
@@ -0,0 +1,40 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder
+    xmlns:ui="urn:ui:com.google.gwt.uibinder"
+    xmlns:g="urn:import:com.google.gwt.user.client.ui"
+    xmlns:gxt="urn:import:com.sencha.gxt.widget.core.client"
+  	xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
+  	xmlns:form="urn:import:com.sencha.gxt.widget.core.client.form"
+  	xmlns:button="urn:import:com.sencha.gxt.widget.core.client.button">
+
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="verticalLayoutData">
+    <ui:attributes width="1" height="-1" />
+  </ui:with>
+ 
+  <gxt:Window ui:field="window" pixelSize="300, 130" modal="true" headingText="Device" focusWidget="{saveButton}">
+    <container:VerticalLayoutContainer>
+      <container:child layoutData="{verticalLayoutData}">
+        <form:FieldLabel text="Name">
+          <form:widget>
+            <form:TextField ui:field="name" />
+          </form:widget>
+        </form:FieldLabel>
+      </container:child>
+      <container:child layoutData="{verticalLayoutData}">
+        <form:FieldLabel text="Unique Identifier">
+          <form:widget>
+            <form:TextField ui:field="uniqueId" />
+          </form:widget>
+        </form:FieldLabel>
+      </container:child>
+    </container:VerticalLayoutContainer>
+      
+    <gxt:button>
+      <button:TextButton ui:field="saveButton" text="Save" />
+    </gxt:button>
+    <gxt:button>
+      <button:TextButton ui:field="cancelButton" text="Cancel" />
+    </gxt:button>
+  </gxt:Window>
+
+</ui:UiBinder>
diff --git a/src/org/traccar/web/client/view/DeviceView.java b/src/org/traccar/web/client/view/DeviceView.java
new file mode 100644
index 0000000..157973e
--- /dev/null
+++ b/src/org/traccar/web/client/view/DeviceView.java
@@ -0,0 +1,128 @@
+package org.traccar.web.client.view;
+
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.traccar.web.client.model.DeviceProperties;
+import org.traccar.web.shared.model.Device;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.uibinder.client.UiHandler;
+import com.google.gwt.user.client.ui.Composite;
+import com.google.gwt.user.client.ui.Widget;
+import com.sencha.gxt.core.client.Style.SelectionMode;
+import com.sencha.gxt.data.shared.ListStore;
+import com.sencha.gxt.widget.core.client.ContentPanel;
+import com.sencha.gxt.widget.core.client.button.TextButton;
+import com.sencha.gxt.widget.core.client.event.SelectEvent;
+import com.sencha.gxt.widget.core.client.grid.ColumnConfig;
+import com.sencha.gxt.widget.core.client.grid.ColumnModel;
+import com.sencha.gxt.widget.core.client.grid.Grid;
+import com.sencha.gxt.widget.core.client.selection.SelectionChangedEvent;
+
+public class DeviceView extends Composite implements SelectionChangedEvent.SelectionChangedHandler<Device> {
+
+    private static DeviceViewUiBinder uiBinder = GWT.create(DeviceViewUiBinder.class);
+
+    interface DeviceViewUiBinder extends UiBinder<Widget, DeviceView> {
+    }
+
+    public interface DeviceHandler {
+        public void onSelected(Device device);
+        public void onAdd();
+        public void onEdit(Device device);
+        public void onRemove(Device device);
+    }
+
+    private DeviceHandler deviceHandler;
+
+    @UiField
+    ContentPanel contentPanel;
+
+    public ContentPanel getView() {
+        return contentPanel;
+    }
+
+    @UiField
+    TextButton addButton;
+
+    @UiField
+    TextButton editButton;
+
+    @UiField
+    TextButton removeButton;
+
+    @UiField(provided = true)
+    ColumnModel<Device> columnModel;
+
+    @UiField(provided = true)
+    ListStore<Device> store;
+
+    @UiField
+    Grid<Device> grid;
+
+    public DeviceView(DeviceHandler deviceHandler) {
+        this.deviceHandler = deviceHandler;
+
+        DeviceProperties deviceProperties = GWT.create(DeviceProperties.class);
+
+        List<ColumnConfig<Device, ?>> columnConfigList = new LinkedList<ColumnConfig<Device, ?>>();
+        columnConfigList.add(new ColumnConfig<Device, String>(deviceProperties.name(), 0, "Name"));
+        columnConfigList.add(new ColumnConfig<Device, String>(deviceProperties.uniqueId(), 0, "Unique Identifier"));
+        columnModel = new ColumnModel<Device>(columnConfigList);
+
+        store = new ListStore<Device>(deviceProperties.id());
+
+        uiBinder.createAndBindUi(this);
+
+        grid.getSelectionModel().addSelectionChangedHandler(this);
+        grid.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
+    }
+
+    @Override
+    public void onSelectionChanged(SelectionChangedEvent<Device> event) {
+        editButton.setEnabled(!event.getSelection().isEmpty());
+        removeButton.setEnabled(!event.getSelection().isEmpty());
+
+        if (event.getSelection().isEmpty()) {
+            deviceHandler.onSelected(null);
+        } else {
+            deviceHandler.onSelected(event.getSelection().get(0));
+        }
+    }
+
+    public void load(Collection<Device> devices) {
+        store.addAll(devices);
+    }
+
+    @UiHandler("addButton")
+    public void onAddClicked(SelectEvent event) {
+        deviceHandler.onAdd();
+    }
+
+    public void add(Device device) {
+        store.add(store.size(), device);
+    }
+
+    @UiHandler("editButton")
+    public void onEditClicked(SelectEvent event) {
+        deviceHandler.onEdit(grid.getSelectionModel().getSelectedItem());
+    }
+
+    public void update(Device device) {
+        store.update(device);
+    }
+
+    @UiHandler("removeButton")
+    public void onRemoveClicked(SelectEvent event) {
+        deviceHandler.onRemove(grid.getSelectionModel().getSelectedItem());
+    }
+
+    public void remove(Device device) {
+        store.remove(device);
+    }
+
+}
diff --git a/src/org/traccar/web/client/view/DeviceView.ui.xml b/src/org/traccar/web/client/view/DeviceView.ui.xml
new file mode 100644
index 0000000..d9988d5
--- /dev/null
+++ b/src/org/traccar/web/client/view/DeviceView.ui.xml
@@ -0,0 +1,46 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder
+    xmlns:ui="urn:ui:com.google.gwt.uibinder"
+    xmlns:g="urn:import:com.google.gwt.user.client.ui"
+    xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
+    xmlns:gxt="urn:import:com.sencha.gxt.widget.core.client"
+    xmlns:toolbar="urn:import:com.sencha.gxt.widget.core.client.toolbar"
+    xmlns:grid="urn:import:com.sencha.gxt.widget.core.client.grid"
+    xmlns:button="urn:import:com.sencha.gxt.widget.core.client.button">
+
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="toolBarRowData">
+    <ui:attributes width="1" height="-1" />
+  </ui:with>
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="layoutData">
+    <ui:attributes width="1" height="1" />
+  </ui:with>
+  
+  <ui:with type="com.sencha.gxt.data.shared.ListStore" field="store" />
+  <ui:with type="com.sencha.gxt.widget.core.client.grid.ColumnModel" field="columnModel" />
+  
+  <ui:with type="com.sencha.gxt.widget.core.client.grid.GridView" field="view">
+    <ui:attributes stripeRows="true" autoFill="true" />
+  </ui:with>
+
+  <gxt:ContentPanel ui:field="contentPanel" headingText="Devices">
+    <container:VerticalLayoutContainer>
+
+      <container:child layoutData="{toolBarRowData}">
+        <toolbar:ToolBar>
+          <button:TextButton ui:field="addButton" text="Add" />
+          <button:TextButton ui:field="editButton" text="Edit" enabled="false" />
+          <button:TextButton ui:field="removeButton" text="Remove" enabled="false" />
+          <toolbar:FillToolItem />
+          <toolbar:SeparatorToolItem />
+          <button:TextButton ui:field="settingsButton" text="Settings" enabled="false" />
+        </toolbar:ToolBar>
+      </container:child>
+      
+      <container:child layoutData="{layoutData}">
+        <grid:Grid ui:field="grid" store="{store}" cm="{columnModel}" view="{view}" />
+      </container:child>
+
+    </container:VerticalLayoutContainer>
+  </gxt:ContentPanel>
+
+</ui:UiBinder>
diff --git a/src/org/traccar/web/client/view/LoginDialog.java b/src/org/traccar/web/client/view/LoginDialog.java
new file mode 100644
index 0000000..4447417
--- /dev/null
+++ b/src/org/traccar/web/client/view/LoginDialog.java
@@ -0,0 +1,59 @@
+package org.traccar.web.client.view;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.uibinder.client.UiBinder;
+import com.google.gwt.uibinder.client.UiField;
+import com.google.gwt.uibinder.client.UiHandler;
+import com.google.gwt.user.client.ui.Widget;
+import com.sencha.gxt.widget.core.client.Window;
+import com.sencha.gxt.widget.core.client.event.SelectEvent;
+import com.sencha.gxt.widget.core.client.form.PasswordField;
+import com.sencha.gxt.widget.core.client.form.TextField;
+
+public class LoginDialog {
+
+    private static LoginDialogUiBinder uiBinder = GWT.create(LoginDialogUiBinder.class);
+
+    interface LoginDialogUiBinder extends UiBinder<Widget, LoginDialog> {
+    }
+
+    public interface LoginHandler {
+        public void onLogin(String login, String password);
+        public void onRegister(String login, String password);
+    }
+
+    private LoginHandler loginHandler;
+
+    @UiField
+    Window window;
+
+    @UiField
+    TextField login;
+
+    @UiField
+    PasswordField password;
+
+    public LoginDialog(LoginHandler loginHandler) {
+        this.loginHandler = loginHandler;
+        uiBinder.createAndBindUi(this);
+    }
+
+    public void show() {
+        window.show();
+    }
+
+    public void hide() {
+        window.hide();
+    }
+
+    @UiHandler("loginButton")
+    public void onLoginClicked(SelectEvent event) {
+        loginHandler.onLogin(login.getText(), password.getText());
+    }
+
+    @UiHandler("registerButton")
+    public void onRegisterClicked(SelectEvent event) {
+        loginHandler.onRegister(login.getText(), password.getText());
+    }
+
+}
diff --git a/src/org/traccar/web/client/view/LoginDialog.ui.xml b/src/org/traccar/web/client/view/LoginDialog.ui.xml
new file mode 100644
index 0000000..8c31b30
--- /dev/null
+++ b/src/org/traccar/web/client/view/LoginDialog.ui.xml
@@ -0,0 +1,40 @@
+<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
+<ui:UiBinder
+    xmlns:ui="urn:ui:com.google.gwt.uibinder"
+    xmlns:g="urn:import:com.google.gwt.user.client.ui"
+    xmlns:gxt="urn:import:com.sencha.gxt.widget.core.client"
+  	xmlns:container="urn:import:com.sencha.gxt.widget.core.client.container"
+  	xmlns:form="urn:import:com.sencha.gxt.widget.core.client.form"
+  	xmlns:button="urn:import:com.sencha.gxt.widget.core.client.button">
+
+  <ui:with type="com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData" field="verticalLayoutData">
+    <ui:attributes width="1" height="-1" />
+  </ui:with>
+ 
+  <gxt:Window ui:field="window" pixelSize="300, 130" modal="true" closable="false" headingText="Authentication" focusWidget="{loginButton}">
+    <container:VerticalLayoutContainer>
+      <container:child layoutData="{verticalLayoutData}">
+        <form:FieldLabel text="User">
+          <form:widget>
+            <form:TextField ui:field="login" />
+          </form:widget>
+        </form:FieldLabel>
+      </container:child>
+      <container:child layoutData="{verticalLayoutData}">
+        <form:FieldLabel text="Password">
+          <form:widget>
+            <form:PasswordField ui:field="password" />
+          </form:widget>
+        </form:FieldLabel>
+      </container:child>
+    </container:VerticalLayoutContainer>
+      
+    <gxt:button>
+      <button:TextButton ui:field="loginButton" text="Login" />
+    </gxt:button>
+    <gxt:button>
+      <button:TextButton ui:field="registerButton" text="Register" />
+    </gxt:button>
+  </gxt:Window>
+
+</ui:UiBinder>
diff --git a/src/org/traccar/web/client/view/MapView.java b/src/org/traccar/web/client/view/MapView.java
new file mode 100644
index 0000000..af38c44
--- /dev/null
+++ b/src/org/traccar/web/client/view/MapView.java
@@ -0,0 +1,149 @@
+package org.traccar.web.client.view;
+
+import java.util.AbstractMap;
+import java.util.HashMap;
+import java.util.List;
+
+import org.gwtopenmaps.openlayers.client.Icon;
+import org.gwtopenmaps.openlayers.client.LonLat;
+import org.gwtopenmaps.openlayers.client.Map;
+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.ScaleLine;
+import org.gwtopenmaps.openlayers.client.layer.Markers;
+import org.gwtopenmaps.openlayers.client.layer.OSM;
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.event.logical.shared.ResizeEvent;
+import com.google.gwt.event.logical.shared.ResizeHandler;
+import com.google.gwt.user.client.Command;
+import com.sencha.gxt.widget.core.client.ContentPanel;
+
+class MarkerIconFactory {
+
+    private static final Size iconSize = new Size(21, 25);
+    private static final Pixel iconOffset = new Pixel(-10.5f, -25.0f);
+
+    private static final String iconUrl = "http://www.openlayers.org/api/img/";
+    private static final String iconRed = iconUrl + "marker.png";
+    private static final String iconBlue = iconUrl + "marker-blue.png";
+    private static final String iconGreen = iconUrl + "marker-green.png";
+    private static final String iconGold = iconUrl + "marker-gold.png";
+
+    public static Icon getLocationIcon() {
+        return new Icon(iconRed, iconSize, iconOffset);
+    }
+
+    public static Icon getSelectedLocationIcon() {
+        return new Icon(iconGreen, iconSize, iconOffset);
+    }
+
+    public static Icon getArchiveIcon() {
+        return new Icon(iconBlue, iconSize, iconOffset);
+    }
+
+    public static Icon getSelectedArchiveIcon() {
+        return new Icon(iconGold, iconSize, iconOffset);
+    }
+
+}
+
+public class MapView {
+
+    private ContentPanel contentPanel;
+
+    public ContentPanel getView() {
+        return contentPanel;
+    }
+
+    private MapWidget mapWidget;
+    private Map map;
+    private Markers markerLayer;
+
+    private LonLat createPoint(double longitude, double latitude) {
+        LonLat point = new LonLat(longitude, latitude);
+        point.transform(new Projection("EPSG:4326").getProjectionCode(), map.getProjection());
+        return point;
+    }
+
+    public MapView() {
+        contentPanel = new ContentPanel();
+        contentPanel.setHeadingText("Map");
+
+        MapOptions defaultMapOptions = new MapOptions();
+        defaultMapOptions.setNumZoomLevels(16);
+
+        mapWidget = new MapWidget("100%", "100%", defaultMapOptions);
+        map = mapWidget.getMap();
+
+        OSM mapLayer = OSM.Mapnik("Mapnik");
+        mapLayer.setIsBaseLayer(true);
+
+        markerLayer = new Markers("Markers");
+
+        map.addLayer(mapLayer);
+        map.addLayer(markerLayer);
+        map.addControl(new ScaleLine());
+        map.setCenter(createPoint(30, 60), 1);
+
+        contentPanel.add(mapWidget);
+
+        // Update map size
+        contentPanel.addResizeHandler(new ResizeHandler() {
+            @Override
+            public void onResize(ResizeEvent event) {
+                Scheduler.get().scheduleDeferred(new Command() {
+                    @Override
+                    public void execute() {
+                        map.updateSize();
+                    }
+                });
+            }
+        });
+    }
+
+    private AbstractMap<Long, Marker> markerMap = new HashMap<Long, Marker>();
+    private Device selectedDevice;
+
+    public void showPositions(List<Position> positions) {
+        markerMap.clear();
+        markerLayer.clearMarkers();
+        for (Position position : positions) {
+            Marker marker = new Marker(
+                    createPoint(position.getLongitude(), position.getLatitude()), MarkerIconFactory.getLocationIcon());
+            markerMap.put(position.getDevice().getId(), marker);
+            markerLayer.addMarker(marker);
+        }
+        if (selectedDevice != null) {
+            select(selectedDevice, false);
+        }
+    }
+
+    private void changeMarkerIcon(Marker marker, Icon icon) {
+        Marker newMarker = new Marker(marker.getLonLat(), icon);
+        markerLayer.removeMarker(marker);
+        markerLayer.addMarker(newMarker);
+    }
+
+    public void select(Device device, boolean center) {
+        if (selectedDevice != null) {
+            changeMarkerIcon(markerMap.get(selectedDevice.getId()), MarkerIconFactory.getLocationIcon());
+            selectedDevice = null;
+        }
+        if (device != null && markerMap.containsKey(device.getId())) {
+            Marker marker = markerMap.get(device.getId());
+            if (center) {
+                map.panTo(marker.getLonLat());
+            }
+            changeMarkerIcon(marker, MarkerIconFactory.getSelectedLocationIcon());
+            selectedDevice = device;
+        }
+    }
+
+}
diff --git a/src/org/traccar/web/server/model/DataServiceImpl.java b/src/org/traccar/web/server/model/DataServiceImpl.java
new file mode 100644
index 0000000..cfcc622
--- /dev/null
+++ b/src/org/traccar/web/server/model/DataServiceImpl.java
@@ -0,0 +1,172 @@
+package org.traccar.web.server.model;
+
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.persistence.EntityManager;
+import javax.persistence.Persistence;
+import javax.persistence.TypedQuery;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpSession;
+
+import org.traccar.web.client.model.DataService;
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+import org.traccar.web.shared.model.User;
+
+import com.google.gwt.user.server.rpc.RemoteServiceServlet;
+
+public class DataServiceImpl extends RemoteServiceServlet implements DataService {
+
+    private static final long serialVersionUID = 1;
+
+    private static final String PERSISTENCE_DATASTORE = "java:/DefaultDS";
+    private static final String PERSISTENCE_UNIT_DEBUG = "debug";
+    private static final String PERSISTENCE_UNIT_RELEASE = "release";
+    private static final String ATTRIBUTE_USER = "user";
+
+    private EntityManager entityManager;
+
+    @Override
+    public void init() throws ServletException {
+        super.init();
+
+        String persistenceUnit;
+        try {
+            Context context = new InitialContext();
+            context.lookup(PERSISTENCE_DATASTORE);
+            persistenceUnit = PERSISTENCE_UNIT_RELEASE;
+        } catch (NamingException e) {
+            persistenceUnit = PERSISTENCE_UNIT_DEBUG;
+        }
+
+        entityManager = Persistence.createEntityManagerFactory(persistenceUnit).createEntityManager();
+    }
+
+    @Override
+    public void destroy() {
+        entityManager.close();
+        super.destroy();
+    }
+
+    private void setUser(User user) {
+        HttpSession session = getThreadLocalRequest().getSession();
+        session.setAttribute(ATTRIBUTE_USER, user);
+    }
+
+    private User getUser() {
+        HttpSession session = getThreadLocalRequest().getSession();
+        return (User) session.getAttribute(ATTRIBUTE_USER);
+    }
+
+    @Override
+    public boolean authenticated() {
+        return (getUser() != null);
+    }
+
+    @Override
+    public boolean authenticate(String login, String password) {
+        TypedQuery<User> query = entityManager.createQuery(
+                "SELECT x FROM User x WHERE x.login = :login", User.class);
+        query.setParameter("login", login);
+        List<User> results = query.getResultList();
+
+        if (!results.isEmpty() && password.equals(results.get(0).getPassword())) {
+            setUser(results.get(0));
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public boolean register(String login, String password) {
+        User user = new User();
+        user.setLogin(login);
+        user.setPassword(password);
+        entityManager.getTransaction().begin();
+        try {
+            entityManager.persist(user);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        setUser(user);
+        return true;
+    }
+
+    @Override
+    public List<Device> getDevices() {
+        User user = getUser();
+        List<Device> devices = new LinkedList<Device>();
+        devices.addAll(user.getDevices());
+        return devices;
+    }
+
+    @Override
+    public Device addDevice(Device device) {
+        User user = getUser();
+        entityManager.getTransaction().begin();
+        try {
+            entityManager.persist(device);
+            user.getDevices().add(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public Device updateDevice(Device device) {
+        entityManager.getTransaction().begin();
+        try {
+            device = entityManager.merge(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public Device removeDevice(Device device) {
+        User user = getUser();
+        entityManager.getTransaction().begin();
+        try {
+            device = entityManager.merge(device);
+            user.getDevices().remove(device);
+            entityManager.remove(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public List<Position> getPositions(Device device, Date from, Date to) {
+        List<Position> positions = new LinkedList<Position>();
+        TypedQuery<Position> query = entityManager.createQuery(
+                "SELECT x FROM Position x WHERE x.device = :device AND x.time BETWEEN :from AND :to", Position.class);
+        query.setParameter("device", device);
+        query.setParameter("from", from);
+        query.setParameter("to", to);
+        positions.addAll(query.getResultList());
+        return positions;
+    }
+
+    @Override
+    public List<Position> getLatestPositions() {
+        List<Position> positions = new LinkedList<Position>();
+        User user = getUser();
+        if (!user.getDevices().isEmpty()) {
+            TypedQuery<Position> query = entityManager.createQuery(
+                    "SELECT x FROM Position x WHERE (x.device, x.time) IN (" +
+                            "SELECT y.device, MAX(y.time) FROM Position y WHERE y.device IN :devices GROUP BY y.device)", Position.class);
+            query.setParameter("devices", user.getDevices());
+            positions.addAll(query.getResultList());
+        }
+        return positions;
+    }
+
+}
diff --git a/src/org/traccar/web/shared/model/Device.java b/src/org/traccar/web/shared/model/Device.java
new file mode 100644
index 0000000..8ae67c3
--- /dev/null
+++ b/src/org/traccar/web/shared/model/Device.java
@@ -0,0 +1,56 @@
+package org.traccar.web.shared.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "devices")
+public class Device implements Serializable {
+
+    private static final long serialVersionUID = 1;
+
+    public Device() {
+    }
+
+    public Device(Device device) {
+        id = device.id;
+        uniqueId = device.uniqueId;
+        name = device.name;
+    }
+
+    @Id
+    @GeneratedValue
+    private long id;
+
+    public long getId() {
+        return id;
+    }
+
+    @Column(unique = true)
+    private String uniqueId;
+
+    public void setUniqueId(String uniqueId) {
+        this.uniqueId = uniqueId;
+    }
+
+    public String getUniqueId() {
+        return uniqueId;
+    }
+
+    @Column(unique = true)
+    private String name;
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}
diff --git a/src/org/traccar/web/shared/model/Position.java b/src/org/traccar/web/shared/model/Position.java
new file mode 100644
index 0000000..1382730
--- /dev/null
+++ b/src/org/traccar/web/shared/model/Position.java
@@ -0,0 +1,115 @@
+package org.traccar.web.shared.model;
+
+import java.io.Serializable;
+import java.util.Date;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+
+import org.hibernate.annotations.Index;
+
+@Entity
+@Table(name = "positions")
+public class Position implements Serializable, Cloneable {
+
+    private static final long serialVersionUID = 1;
+
+    public Position() {
+    }
+
+    public Position(Position position) {
+        id = position.id;
+        device = position.device;
+        time = position.time;
+        valid = position.valid;
+        latitude = position.latitude;
+        longitude = position.longitude;
+        altitude = position.altitude;
+        speed = position.speed;
+        course = position.course;
+        power = position.power;
+        address = position.address;
+        other = position.other;
+    }
+
+    @Id
+    @GeneratedValue
+    private long id;
+
+    public long getId() {
+        return id;
+    }
+
+    @ManyToOne
+    @Index(name = "positionsIndex")
+    private Device device;
+
+    public Device getDevice() {
+        return device;
+    }
+
+    @Index(name = "positionsIndex")
+    private Date time;
+
+    public Date getTime() {
+        return time;
+    }
+
+    private boolean valid;
+
+    public boolean getValid() {
+        return valid;
+    }
+
+    private double latitude;
+
+    public double getLatitude() {
+        return latitude;
+    }
+
+    private double longitude;
+
+    public double getLongitude() {
+        return longitude;
+    }
+
+    private double altitude;
+
+    public double getAltitude() {
+        return altitude;
+    }
+
+    private double speed;
+
+    public double getSpeed() {
+        return speed;
+    }
+
+    private double course;
+
+    public double getCourse() {
+        return course;
+    }
+
+    private double power;
+
+    public double getPower() {
+        return power;
+    }
+
+    private String address;
+
+    public String getAddress() {
+        return address;
+    }
+
+    private String other;
+
+    public String getOther() {
+        return other;
+    }
+
+}
diff --git a/src/org/traccar/web/shared/model/User.java b/src/org/traccar/web/shared/model/User.java
new file mode 100644
index 0000000..9064f19
--- /dev/null
+++ b/src/org/traccar/web/shared/model/User.java
@@ -0,0 +1,65 @@
+package org.traccar.web.shared.model;
+
+import java.io.Serializable;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+
+@Entity
+@Table(name="users")
+public class User implements Serializable, Cloneable {
+
+    private static final long serialVersionUID = 1;
+
+    public User() {
+    }
+
+    public User(User user) {
+        id = user.id;
+        login = user.login;
+        password = user.password;
+    }
+
+    @Id
+    @GeneratedValue
+    private long id;
+
+    public long getId() {
+        return id;
+    }
+
+    @Column(unique = true)
+    private String login;
+
+    public void setLogin(String login) {
+        this.login = login;
+    }
+
+    public String getLogin() {
+        return login;
+    }
+
+    private String password;
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    @OneToMany
+    private List<Device> devices = new LinkedList<Device>();
+
+    public List<Device> getDevices() {
+        return devices;
+    }
+
+}