private void ExportGraphs(FieldGrid Grid, string Title, int Width, int Height)
{
if (Grid == null)
{
return;
}
int w = Grid.Width;
Field[,] Cells = Grid.Cells;
Field Cell;
int x, y;
bool TitleOutput = false;
x = 0;
foreach (string FieldName in Grid.XLabels)
{
List <DateTime> Timepoints = new List <DateTime> ();
List <object> Values = new List <object> ();
FieldNumeric Num;
string Unit = string.Empty;
int BooleanValues = 0;
int NumericalValues = 0;
y = 0;
foreach (DateTime Timepoint in Grid.YAxis)
{
Cell = Cells [x, y];
if (Cell != null)
{
if ((Num = Cell as FieldNumeric) != null)
{
if (NumericalValues == 0)
{
NumericalValues = 1;
Unit = Num.Unit;
}
else if (Unit != Num.Unit)
{
continue;
}
Timepoints.Add(Timepoint);
Values.Add(Cell.GetValue());
}
else if (Cell is FieldBoolean)
{
BooleanValues = 1;
Timepoints.Add(Timepoint);
Values.Add(Cell.GetValue());
}
}
y++;
}
if (Values.Count >= 2 && NumericalValues + BooleanValues == 1)
{
Variables v = new Variables();
Graph Graph;
Bitmap Bmp;
string ContentType = string.Empty;
byte[] Data = null;
v ["X"] = Timepoints.ToArray();
v ["Y"] = Values.ToArray();
v ["YLabel"] = Unit;
try
{
if (NumericalValues == 1)
{
Graph = Expression.ParseCached("line2d(X,Y,'Red','',YLabel)").Evaluate(v) as Graph;
}
else
{
Graph = Expression.ParseCached("scatter2d(X,if Y then 1 else 0,5,'Red','',YLabel)").Evaluate(v) as Graph;
}
if (Graph == null)
{
Bmp = null;
}
else
{
Bmp = Graph.GetImage(Width, Height) as Bitmap;
}
Data = MimeUtilities.Encode(Bmp, out ContentType);
} catch (Exception)
{
Bmp = null;
}
if (Bmp != null)
{
if (this.html.Length == 0)
{
this.html.Append("<html xmlns=\"http://jabber.org/protocol/xhtml-im\"><body xmlns=\"http://www.w3.org/1999/xhtml\">");
}
if (!TitleOutput && !string.IsNullOrEmpty(Title))
{
TitleOutput = true;
this.html.Append("<h1>");
this.html.Append(XmlUtilities.Escape(Title));
this.html.Append("</h1>");
this.text.AppendLine(Title);
}
this.html.Append("<h2>");
this.html.Append(XmlUtilities.Escape(FieldName));
this.html.Append("</h2>");
this.html.Append("<p><img src=\"data:");
this.html.Append(ContentType);
this.html.Append(";base64,");
this.html.Append(System.Convert.ToBase64String(Data, Base64FormattingOptions.None));
this.html.Append("\" width=\"");
this.html.Append(Width.ToString());
this.html.Append("\" height=\"");
this.html.Append(Height.ToString());
this.html.Append("\"/></p>");
this.text.AppendLine("[" + Width.ToString() + "x" + Height.ToString() + " image]");
EventHandler h = this.OnGridExportComplete;
if (h != null)
{
try
{
h(this, new EventArgs());
} catch (Exception ex)
{
Log.Exception(ex);
}
}
}
}
x++;
}
}
private static void HttpGetHistoryGraph(HttpServerResponse resp, HttpServerRequest req)
{
networkLed.High();
try
{
string ValueAxis;
string ParameterName;
string s;
int Width, Height;
if (!req.Query.TryGetValue("w", out s) || !int.TryParse(s, out Width) || Width <= 0 || Width > 2048)
{
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
if (!req.Query.TryGetValue("h", out s) || !int.TryParse(s, out Height) || Height <= 0 || Height > 2048)
{
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
if (!req.Query.TryGetValue("p", out s))
{
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
switch (s)
{
case "temp":
ParameterName = "TemperatureC";
ValueAxis = "Temperature (C)";
break;
case "light":
ParameterName = "LightPercent";
ValueAxis = "Light (%)";
break;
case "motion":
ParameterName = "Motion";
ValueAxis = "Motion";
break;
default:
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
if (!req.Query.TryGetValue("base", out s))
{
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
Variables v = new Variables();
DateTime Now = DateTime.Now;
lock (synchObject)
{
switch (s)
{
case "sec":
v ["Records"] = perSecond.ToArray();
resp.Expires = Now;
break;
case "min":
v ["Records"] = perMinute.ToArray();
resp.Expires = new DateTime(Now.Year, Now.Month, Now.Day, Now.Hour, Now.Minute, 0).AddMinutes(1);
break;
case "h":
v ["Records"] = perHour.ToArray();
resp.Expires = new DateTime(Now.Year, Now.Month, Now.Day, Now.Hour, 0, 0).AddHours(1);
break;
case "day":
v ["Records"] = perDay.ToArray();
resp.Expires = new DateTime(Now.Year, Now.Month, Now.Day, 0, 0, 0).AddDays(1);
break;
case "month":
v ["Records"] = perMonth.ToArray();
resp.Expires = new DateTime(Now.Year, Now.Month, 1, 0, 0, 0).AddMonths(1);
break;
default:
throw new HttpException(HttpStatusCode.ClientError_BadRequest);
}
}
Graph Result;
if (ParameterName == "Motion")
{
Result = Expression.ParseCached("scatter2d(Records.Timestamp,if (Values:=Records.Motion) then 1 else 0,5,if Values then 'Red' else 'Blue','','Motion')").Evaluate(v) as Graph;
}
else
{
Result = Expression.ParseCached("line2d(Records.Timestamp,Records." + ParameterName + ",'','" + ValueAxis + "')").Evaluate(v) as Graph;
}
Image Img = Result.GetImage(Width, Height);
byte[] Data = MimeUtilities.Encode(Img, out s);
resp.ContentType = s;
resp.ReturnCode = HttpStatusCode.Successful_OK;
resp.WriteBinary(Data);
} finally
{
networkLed.Low();
}
}
