/**
* MapActionDemoScreen.java
*
* Copyright � 1998-2011 Research In Motion Limited
*
* 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.
*
* Note: For the sake of simplicity, this sample application may not leverage
* resource bundles and resource strings. However, it is STRONGLY recommended
* that application developers make use of the localization features available
* within the BlackBerry development platform to ensure a seamless application
* experience across a variety of languages and geographies. For more information
* on localizing your application, please refer to the BlackBerry Java Development
* Environment Development Guide associated with this release.
*/
package com.rim.samples.device.mapactiondemo;
import net.rim.device.api.command.Command;
import net.rim.device.api.command.CommandHandler;
import net.rim.device.api.command.ReadOnlyCommandMetadata;
import net.rim.device.api.lbs.maps.MapConstants;
import net.rim.device.api.lbs.maps.MapDimensions;
import net.rim.device.api.lbs.maps.MapFactory;
import net.rim.device.api.lbs.maps.model.MapPoint;
import net.rim.device.api.lbs.maps.ui.MapAction;
import net.rim.device.api.lbs.maps.ui.RichMapField;
import net.rim.device.api.system.Characters;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.Touchscreen;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.Menu;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.input.InputSettings;
import net.rim.device.api.ui.input.TouchscreenSettings;
import net.rim.device.api.util.StringProvider;
/**
* MainScreen class for the MapActionDemo. Menu items allow map panning and/or
* zooming to be disabled or enabled.
*/
public class MapActionDemoScreen extends MainScreen implements
FieldChangeListener {
private final LabelField _latField;
private final LabelField _lonField;
private final LabelField _zoomField;
private final RichMapField _map;
private final RestrictedMapAction _restrictedMapAction;
/**
* Creates a new MapActionDemoScreen object
*/
public MapActionDemoScreen() {
super(Screen.DEFAULT_CLOSE | Screen.DEFAULT_MENU
| Manager.NO_VERTICAL_SCROLL);
setTitle("Map Action Demo");
// Activate pinch gesturing
if (Touchscreen.isSupported()) {
final InputSettings is = TouchscreenSettings.createEmptySet();
is.set(TouchscreenSettings.DETECT_PINCH, 1);
this.addInputSettings(is);
}
_map = MapFactory.getInstance().generateRichMapField();
_map.getMapField()
.setDimensions(
new MapDimensions(Display.getWidth(), Display
.getHeight() - 130));
// Register for field updates (when the center and zoom changes)
_map.getMapField().addChangeListener(this);
// Change the MapAction class the MapField uses
_restrictedMapAction = new RestrictedMapAction();
_map.getMapField().setAction(_restrictedMapAction);
// Disable shared mode
_map.getAction().disableOperationMode(MapConstants.MODE_SHARED_FOCUS);
// Label fields to show the user location info
_latField = new LabelField("Latitude: ");
_lonField = new LabelField("Longitude: ");
_zoomField = new LabelField("Zoom: ");
add(_map);
add(_latField);
add(_lonField);
add(_zoomField);
}
/**
* @see net.rim.device.api.ui.container.MainScreen#makeMenu(Menu, int)
*/
protected void makeMenu(final Menu menu, final int instance) {
final StringBuffer buffer = new StringBuffer();
if (_restrictedMapAction.isZoomingAllowed()) {
buffer.append(Characters.CHECK_MARK).append(' ');
}
buffer.append("Allow Zooming");
final MenuItem zoomItem =
new MenuItem(new StringProvider(buffer.toString()), 0x230010, 0);
zoomItem.setCommand(new Command(new CommandHandler() {
/**
* @see net.rim.device.api.command.CommandHandler#execute(ReadOnlyCommandMetadata,
* Object)
*/
public void execute(final ReadOnlyCommandMetadata metadata,
final Object context) {
_restrictedMapAction.toggleZooming();
}
}));
menu.add(zoomItem);
// Reset buffer
buffer.setLength(0);
if (_restrictedMapAction.isPanningAllowed()) {
buffer.append(Characters.CHECK_MARK).append(' ');
}
buffer.append("Allow Panning");
final MenuItem setCenterItem =
new MenuItem(new StringProvider(buffer.toString()), 0x230020, 1);
setCenterItem.setCommand(new Command(new CommandHandler() {
/**
* @see net.rim.device.api.command.CommandHandler#execute(ReadOnlyCommandMetadata,
* Object)
*/
public void execute(final ReadOnlyCommandMetadata metadata,
final Object context) {
_restrictedMapAction.togglePanning();
}
}));
menu.add(setCenterItem);
}
/**
* @see net.rim.device.api.ui.Screen#onUiEngineAttached(boolean)
*/
protected void onUiEngineAttached(final boolean attached) {
super.onUiEngineAttached(attached);
if (attached) {
// Set the location of the map to some random
// location and set zoom to 5 (this zoom level
// will be overriden by this application's
// RestrictedMapAction class).
_map.getMapField().getAction().setCenterAndZoom(new MapPoint(0, 0),
5);
}
}
/**
* @see net.rim.device.api.ui.Screen#onClose()
*/
public boolean onClose() {
try {
// Properly clean up any resources used
_map.close();
} catch (final Exception e) {
}
return super.onClose();
}
/**
* @see net.rim.device.api.ui.FieldChangeListener#fieldChanged(Field, int)
*/
public void fieldChanged(final Field field, final int context) {
if (field == _map.getMapField()) {
// Get the map's current dimensions
final MapDimensions dim = _map.getMapField().getDimensions();
switch (context) {
case MapAction.ACTION_CENTER_CHANGE:
_latField.setText("Latitude: " + dim.getCenter().getLat());
_lonField.setText("Longitude: " + dim.getCenter().getLon());
break;
case MapAction.ACTION_ZOOM_CHANGE:
_zoomField.setText("Zoom Level: " + dim.getZoom());
break;
}
}
}
}