/** @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;
}
}
}
/** @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.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);
}
}
/** 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);
}
