/// <summary>n
/// Recognizes a collection of Polyline objects into text. Words are recognized with alternatives, eash weighted with probability.
/// </summary>
/// <param name="strokes">Strokes to recognize</param>
/// <returns></returns>
public string RecognizeStrokes(List <List <Point> > strokes, bool bLearn)
{
WritePadAPI.HWR_Reset(WritePadAPI.getRecoHandle());
if (InkData != IntPtr.Zero)
{
WritePadAPI.INK_Erase(InkData);
InkData = IntPtr.Zero;
}
InkData = WritePadAPI.INK_InitData();
foreach (var polyline in strokes)
{
WritePadAPI.AddStroke(InkData, polyline);
}
var res = "";
var resultStringList = new List <string>();
var wordList = new List <List <WordAlternative> >();
var defaultResultPtr = WritePadAPI.recognizeInkData(InkData, 0);
var defaultResult = Marshal.PtrToStringUni(defaultResultPtr);
resultStringList.Add(defaultResult);
var wordCount = WritePadAPI.HWR_GetResultWordCount(WritePadAPI.getRecoHandle());
for (var i = 0; i < wordCount; i++)
{
var wordAlternativesList = new List <WordAlternative>();
var altCount = WritePadAPI.HWR_GetResultAlternativeCount(WritePadAPI.getRecoHandle(), i);
for (var j = 0; j < altCount; j++)
{
var wordPtr = WritePadAPI.getResultWord(i, j);
var word = Marshal.PtrToStringUni(wordPtr);
if (word == "<--->")
{
word = "*Error*";
}
if (string.IsNullOrEmpty(word))
{
continue;
}
uint flags = WritePadAPI.HWR_GetRecognitionFlags(WritePadAPI.getRecoHandle());
var weight = WritePadAPI.HWR_GetResultWeight(WritePadAPI.getRecoHandle(), i, j);
if (weight == 0)
{
continue;
}
if (j == 0 && bLearn && weight > 75 && 0 != (flags & WritePadAPI.FLAG_ANALYZER))
{
// if learner is enabled, learn default word(s) when the Return gesture is used
WritePadAPI.recoLearnWord(word, weight);
}
if (wordAlternativesList.All(x => x.Word != word))
{
wordAlternativesList.Add(new WordAlternative
{
Word = word,
Weight = weight
}
);
}
while (resultStringList.Count < j + 2)
{
var emptyStr = "";
for (int k = 0; k < i; k++)
{
emptyStr += "\t";
}
resultStringList.Add(emptyStr);
}
if (resultStringList[j + 1].Length > 0)
{
resultStringList[j + 1] += "\t\t";
}
resultStringList[j + 1] += word + "\t[" + weight + "%]";
}
wordList.Add(wordAlternativesList);
}
foreach (var line in resultStringList)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
if (res.Length > 0)
{
res += Environment.NewLine;
}
res += line;
}
return(res);
}