private void RefreshLocationStatuses()
{
// Handles first cases where no location is found.
GeoPositionStatus locStatus = Model.Core.DeviceLocationStatus;
// Location service is disabled or unavailable.
if (locStatus == GeoPositionStatus.Disabled)
{
LocationWarning = "This device's location services are disabled or not working.";
}
// Location service is OK but no data was found.
else if (locStatus == GeoPositionStatus.NoData)
{
LocationWarning = "Location services are enabled but gave no data so far.";
}
else if (locStatus == GeoPositionStatus.Initializing)
{
LocationWarning = null;
}
if (locStatus != GeoPositionStatus.Ready)
{
LocationStatus = "Status: " + locStatus.ToString();
LocationAccuracyStatus = null;
return;
}
// Location service is OK and data should be here.
GeoCoordinate loc = Model.Core.DeviceLocation;
// Data is not valid.
if (loc == null || loc.IsUnknown)
{
LocationWarning = "Location services are enabled but only gave invalid data so far.";
LocationStatus = "Status: " + locStatus.ToString();
return;
}
// Data is valid.
bool isPoorAccuracy = loc.HorizontalAccuracy >= MaxGoodLocationAccuracy;
LocationStatus = loc.ToZonePoint().ToString(GeoCoordinateUnit.DegreesMinutes);
LocationAccuracyStatus = String.Format("Accuracy: {0:0.00}m ({1})",
loc.HorizontalAccuracy,
isPoorAccuracy ? "POOR" : "OK");
// Shows a warning for low accuracy.
if (isPoorAccuracy)
{
LocationWarning = "Very low accuracy. Try looking for clear sky.";
}
else
{
LocationWarning = null;
}
}
// <summary>
// Creates an instance of GeoCoordinateWatcherInternal with the specified desired accuracy
// </summary>
public GeoCoordinateWatcherInternal(GeoPositionAccuracy desiredAccuracy)
{
//
// Create the native location object on a worker thread, so that it exists
// in a multithreaded apartment.
//
ThreadPool.QueueUserWorkItem(new WaitCallback(this.CreateHandler), desiredAccuracy);
Utility.Trace("GeoCoordinateWatcherInternal.ctor:" +
" desiredAccuracy: " + desiredAccuracy.ToString() +
" m_latLongRegistered: " + m_latLongRegistered.ToString() +
" m_civicAddrRegistered: " + m_civicAddrRegistered.ToString() +
" m_latLongStatus: " + m_latLongStatus.ToString() +
" m_curStatus: " + m_curStatus.ToString());
}
/// <summary>
/// This is where the application responds to new status information. In this case, it simply
/// displays the location information. If emulation is enabled and the status is Ready, a
/// new thread is launched for position emulation. This mimics the behaviour of the live data,
/// where location data doesn't arrive until the LocationService status is Ready.
/// </summary>
/// <param name="status"></param>
void StatusChanged(GeoPositionStatus status)
{
// Display the current status
statusTextBlock.Text = status.ToString();
// If emulation is being used and the status is Ready, start the position emulation thread
if (status == GeoPositionStatus.Ready && useEmulation)
{
positionEmulationThread = new Thread(StartPositionEmulation);
positionEmulationThread.Start();
}
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.Black);
spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend);
spriteBatch.DrawString(spriteFont, currentState.ToString(), new Vector2(0, 0), Color.White);
if (SavedGeoCoord != null && CurrentGeoCoord != null)
{
spriteBatch.DrawString(spriteFont,
string.Format("Distance: {0:0.00}meters, {1:0.00}feet\n" +
"Speed: {2:0.00}meters/s, {3:0.00}km/h, {4:0.00}mph",
distance,
distance * 3.2808399,
CurrentGeoCoord.Location.Speed,
CurrentGeoCoord.Location.Speed * 3.6,
CurrentGeoCoord.Location.Speed * 3.6 * 0.621371192),
new Vector2(0, 480), Color.White);
if (buttonToggleNorthUp.Text == "Toggle: North up")
{
// North up mode
spriteBatch.Draw(texCircle,
new Vector2((graphics.PreferredBackBufferWidth - texCircle.Width) / 2, graphics.PreferredBackBufferHeight - texCircle.Height - 10),
Color.White);
spriteBatch.Draw(texArrow, new Rectangle((graphics.PreferredBackBufferWidth) / 2, graphics.PreferredBackBufferHeight - texCircle.Height / 2 - 10, texCircle.Width, texCircle.Height),
null, Color.White,
(float)DegreeToRadian(CurrentGeoCoord.Location.Course), // Your current movement direction
new Vector2(128, 128), SpriteEffects.None, 0);
spriteBatch.Draw(texSpot, new Rectangle((graphics.PreferredBackBufferWidth) / 2, graphics.PreferredBackBufferHeight - texCircle.Height / 2 - 10, texCircle.Width, texCircle.Height),
null, Color.White,
(float)DegreeToRadian(bearing), // In what direction your saved location is related to your current location
new Vector2(128, 128), SpriteEffects.None, 0);
}
else
{
// Your direction up mode
// Every thing is the same as above except the all angles are being shifted by (-curGeoCoord.Location.Course),
// so that your movement direction is always pointing up
spriteBatch.Draw(texCircle, new Rectangle((graphics.PreferredBackBufferWidth) / 2, graphics.PreferredBackBufferHeight - texCircle.Height / 2 - 10, texCircle.Width, texCircle.Height),
null, Color.White,
-(float)DegreeToRadian(CurrentGeoCoord.Location.Course), new Vector2(128, 128), SpriteEffects.None, 0);
spriteBatch.Draw(texArrow, new Rectangle((graphics.PreferredBackBufferWidth) / 2, graphics.PreferredBackBufferHeight - texCircle.Height / 2 - 10, texCircle.Width, texCircle.Height),
null, Color.White,
0,
new Vector2(128, 128), SpriteEffects.None, 0);
spriteBatch.Draw(texSpot, new Rectangle((graphics.PreferredBackBufferWidth) / 2, graphics.PreferredBackBufferHeight - texCircle.Height / 2 - 10, texCircle.Width, texCircle.Height),
null, Color.White,
(float)DegreeToRadian(bearing) - (float)DegreeToRadian(CurrentGeoCoord.Location.Course),
new Vector2(128, 128), SpriteEffects.None, 0);
}
}
spriteBatch.End();
// Some ui elements combine 3D geometry with text so they can't render within a SpriteBatch.Begin/End section.
for (int b = 0; b < uiElementList.Count; b++)
{
uiElementList[b].Draw(spriteBatch);
}
base.Draw(gameTime);
}