/// <summary>
/// Called when leaving this page/view
/// </summary>
/// <param name="e"></param>
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
while (BoardPositions.Count > 0)
{
PositionInstance pos = BoardPositions.First <PositionInstance>();
BoardPositions.Remove(pos);
pos.Reinitialize();
_LocalPersistentObject.queuePositionInstances.Enqueue(pos);
}
BoardPositions = null;
}
/// <summary>
/// Processes the Board image into individual pieces that can be selected and identified seprately.
/// </summary>
/// <param name="_bmp"></param>
private async void ProcessBoard(WriteableBitmap _bmp)
{
if (BoardPositions == null)
{
return;
}
String[] verticalPos = { "a", "b", "c", "d", "e", "f", "g", "h" };
WriteableBitmap originalBitmap = _bmp;
int posSize = 64;
UpdateConsole("Processing Board Image into Pieces...");
originalBitmap = originalBitmap.Resize(512, 512, WriteableBitmapExtensions.Interpolation.Bilinear);
BoardPositions.Clear();
for (int v = 7; v >= 0; v--)
{
for (int h = 1; h <= 8; h++)
{
int x0 = (h - 1) * posSize;
int y0 = (8 - (v + 1)) * posSize;
//x1 = h * posSize;
//y1 = (8-v) * posSize;
PositionInstance bPos = _LocalPersistentObject.queuePositionInstances.Dequeue();
bPos.PositionID = verticalPos[(h - 1)] + (v + 1);
bPos.PositionImage = new WriteableBitmap(posSize, posSize);
WriteableBitmap modifiedBitmap = originalBitmap.Crop(x0, y0, posSize, posSize);
bPos.PositionImage = modifiedBitmap;
bPos.PieceID = (int)PositionInstance.PieceEnum.EPY;
modifiedBitmap = modifiedBitmap.Resize(64, 64, WriteableBitmapExtensions.Interpolation.Bilinear);
//modifiedBitmap = modifiedBitmap.Gray();
bPos.PositionImageByte = await EncodeImage(modifiedBitmap);
bPos.PositionImage = modifiedBitmap;
bPos.PieceName = "Empty";
BoardPositions.Add(bPos);
}
}
UpdateConsole("Processing Done...");
//PredictBoardPieces();
}
/// <summary>
/// Instantiates a list of PositionInstances and Queues them for future use
/// </summary>
private void PositionInstancesFactory()
{
// Only instantiate new objects in the queue if it is empty
if (_LocalPersistentObject.queuePositionInstances != null)
{
if (_LocalPersistentObject.queuePositionInstances.Count > 0)
{
return;
}
}
_LocalPersistentObject.queuePositionInstances = new Queue <PositionInstance>();
for (int i = 1; i <= 64; i++)
{
PositionInstance bPos = new PositionInstance();
_LocalPersistentObject.queuePositionInstances.Enqueue(bPos);
}
}
/// <summary>
/// Predicts the pieces on the board for each position
/// </summary>
private async void PredictBoardPieces()
{
UpdateConsole("Starting board prediction...");
String url = _LocalPersistentObject.predictionURLString;
String str = SerializeTable();
HttpResponseMessage response;
// Send request
UpdateConsole("Sending board configuration to service...");
using (var client = new HttpClient())
{
try
{
Uri uri = new Uri(url);
response = await client.PostAsync(
uri, new StringContent(str, Encoding.UTF8, "application/json"));
}
catch (Exception ex)
{
UpdateConsole("An network related error occured: " + ex.Message);
return;
}
}
UpdateConsole("Response received! Processing...");
List <PredictedPiece> predictionResults;
try
{
// Deserialize Response
string json = await response.Content.ReadAsStringAsync();
predictionResults = JsonConvert.DeserializeObject <List <PredictedPiece> >(json);
}
catch (Exception ex)
{
UpdateConsole("An error occured when parsing the response: " + ex.Message);
throw new Exception("JSON deserialization error:", ex);
}
int pos = 0;
// Update the Observable Collection with the predicted values
foreach (PositionInstance position in BoardPositions)
{
PredictedPiece predictedPiece = predictionResults.ElementAt <PredictedPiece>(pos);
if (String.Compare(predictedPiece.PositionID, position.PositionID, true) == 0)
{
position.PieceID = predictedPiece.PredictedPieceID;
position.PredictedPieceID = predictedPiece.PredictedPieceID;
position.PieceKeyID = PositionInstance.GetPieceKeyFromPieceID(position.PieceID);
position.PieceName = PositionInstance.GetPieceNameFromPieceID(position.PieceID);
position.IsPredicted = true;
UpdateConsole(new StringBuilder().AppendFormat("We Predicted the Piece at {0} is a {1}={2}", position.PositionID,
position.PredictedPieceID,
PositionInstance.PiecesNames[position.PredictedPieceID]).ToString());
}
pos++;
}
UpdateConsole("Board prediction finished...");
}