Пример #1
0
        /// <summary>
        /// Invokes GetAlternateList in the native dll
        /// </summary>
        /// <returns></returns>
        private GestureRecognitionResult[] InvokeGetAlternateList()
        {
            GestureRecognitionResult[] recResults = new GestureRecognitionResult[] { };
            int hr = 0;

            MS.Win32.Recognizer.RECO_RANGE recoRange;
            recoRange.iwcBegin = 0;
            recoRange.cCount   = 1;
            uint countOfAlternates = IRAS_DefaultCount;

            IntPtr[] pRecoAlternates = new IntPtr[IRAS_DefaultCount];

            try
            {
                hr = MS.Win32.Recognizer.UnsafeNativeMethods.GetAlternateList(_hContext, ref recoRange, ref countOfAlternates, pRecoAlternates, MS.Win32.Recognizer.ALT_BREAKS.ALT_BREAKS_SAME);

                if (HRESULT.Succeeded(hr) && countOfAlternates != 0)
                {
                    List <GestureRecognitionResult> resultList = new List <GestureRecognitionResult>();

                    for (int i = 0; i < countOfAlternates; i++)
                    {
                        uint                  size       = 1; // length of string == 1 since gesture id is a single WCHAR
                        StringBuilder         recoString = new StringBuilder(1);
                        RecognitionConfidence confidenceLevel;

                        if (HRESULT.Failed(MS.Win32.Recognizer.UnsafeNativeMethods.GetString(pRecoAlternates[i], out recoRange, ref size, recoString)) ||
                            HRESULT.Failed(MS.Win32.Recognizer.UnsafeNativeMethods.GetConfidenceLevel(pRecoAlternates[i], out recoRange, out confidenceLevel)))
                        {
                            // Fail to retrieve the reco result, skip this one
                            continue;
                        }

                        ApplicationGesture gesture = (ApplicationGesture)recoString[0];
                        Debug.Assert(ApplicationGestureHelper.IsDefined(gesture));
                        if (ApplicationGestureHelper.IsDefined(gesture))
                        {
                            resultList.Add(new GestureRecognitionResult(confidenceLevel, gesture));
                        }
                    }

                    recResults = resultList.ToArray();
                }
            }
            finally
            {
                // Destroy the alternates
                for (int i = 0; i < countOfAlternates; i++)
                {
                    if (pRecoAlternates[i] != IntPtr.Zero)
                    {
                        #pragma warning suppress 6031, 56031 // Return value ignored on purpose.
                        MS.Win32.Recognizer.UnsafeNativeMethods.DestroyAlternate(pRecoAlternates[i]);
                        pRecoAlternates[i] = IntPtr.Zero;
                    }
                }
            }

            return(recResults);
        }
Пример #2
0
        /// <summary>
        /// Invokes GetLatticePtr in the native dll
        /// </summary>
        /// <returns></returns>
        private GestureRecognitionResult[] InvokeGetLatticePtr()
        {
            GestureRecognitionResult[] recResults = new GestureRecognitionResult[] { };

//            int hr = 0;
            IntPtr ptr = IntPtr.Zero;

            // NOTICE-2005/07/11-WAYNEZEN,
            // There is no need to free the returned the structure.
            // The memory will be released when ResetContext, which is invoked in the callee - Recognize, is called.
            if (HRESULT.Succeeded(
                    MS.Win32.Recognizer.UnsafeNativeMethods.GetLatticePtr(
                        _hContext, ref ptr)))
            {
                unsafe
                {
                    MS.Win32.Recognizer.RECO_LATTICE *pRecoLattice = (MS.Win32.Recognizer.RECO_LATTICE *)ptr;

                    uint bestResultColumnCount = pRecoLattice->ulBestResultColumnCount;
                    Debug.Assert(!(bestResultColumnCount != 0 && pRecoLattice->pLatticeColumns == IntPtr.Zero), "Invalid results!");
                    if (bestResultColumnCount > 0 && pRecoLattice->pLatticeColumns != IntPtr.Zero)
                    {
                        List <GestureRecognitionResult> resultList = new List <GestureRecognitionResult>();

                        MS.Win32.Recognizer.RECO_LATTICE_COLUMN *pLatticeColumns =
                            (MS.Win32.Recognizer.RECO_LATTICE_COLUMN *)(pRecoLattice->pLatticeColumns);
                        ulong *pulBestResultColumns = (ulong *)(pRecoLattice->pulBestResultColumns);

                        for (uint i = 0; i < bestResultColumnCount; i++)
                        {
                            ulong column = pulBestResultColumns[i];
                            MS.Win32.Recognizer.RECO_LATTICE_COLUMN recoColumn = pLatticeColumns[column];

                            Debug.Assert(0 < recoColumn.cLatticeElements, "Invalid results!");

                            for (int j = 0; j < recoColumn.cLatticeElements; j++)
                            {
                                MS.Win32.Recognizer.RECO_LATTICE_ELEMENT recoElement =
                                    ((MS.Win32.Recognizer.RECO_LATTICE_ELEMENT *)(recoColumn.pLatticeElements))[j];

                                Debug.Assert((RECO_TYPE)(recoElement.type) == RECO_TYPE.RECO_TYPE_WCHAR, "The Application gesture has to be WCHAR type");

                                if ((RECO_TYPE)(recoElement.type) == RECO_TYPE.RECO_TYPE_WCHAR)
                                {
                                    // Retrieve the confidence lever
                                    RecognitionConfidence confidenceLevel = RecognitionConfidence.Poor;

                                    MS.Win32.Recognizer.RECO_LATTICE_PROPERTIES recoProperties = recoElement.epProp;

                                    uint propertyCount = recoProperties.cProperties;
                                    MS.Win32.Recognizer.RECO_LATTICE_PROPERTY **apProps =
                                        (MS.Win32.Recognizer.RECO_LATTICE_PROPERTY * *)recoProperties.apProps;
                                    for (int k = 0; k < propertyCount; k++)
                                    {
                                        MS.Win32.Recognizer.RECO_LATTICE_PROPERTY *pProps = apProps[k];
                                        if (pProps->guidProperty == GUID_CONFIDENCELEVEL)
                                        {
                                            Debug.Assert(pProps->cbPropertyValue == sizeof(uint) / sizeof(byte));
                                            RecognitionConfidence level = (RecognitionConfidence)(((uint *)pProps->pPropertyValue))[0];
                                            if (level >= RecognitionConfidence.Strong && level <= RecognitionConfidence.Poor)
                                            {
                                                confidenceLevel = level;
                                            }

                                            break;
                                        }
                                    }

                                    ApplicationGesture gesture = (ApplicationGesture)((char)(recoElement.pData));
                                    Debug.Assert(ApplicationGestureHelper.IsDefined(gesture));
                                    if (ApplicationGestureHelper.IsDefined(gesture))
                                    {
                                        // Get the gesture result
                                        resultList.Add(new GestureRecognitionResult(confidenceLevel, gesture));
                                    }
                                }
                            }
                        }

                        recResults = (GestureRecognitionResult[])(resultList.ToArray());
                    }
                }
            }

            return(recResults);
        }
Пример #3
0
        internal static ApplicationGesture[] GetApplicationGestureArrayAndVerify(IEnumerable <ApplicationGesture> applicationGestures)
        {
            if (applicationGestures == null)
            {
                // Null is not allowed as the argument value
                throw new ArgumentNullException("applicationGestures");
            }

            uint count = 0;
            //we need to make a disconnected copy
            ICollection <ApplicationGesture> collection = applicationGestures as ICollection <ApplicationGesture>;

            if (collection != null)
            {
                count = (uint)collection.Count;
            }
            else
            {
                foreach (ApplicationGesture gesture in applicationGestures)
                {
                    count++;
                }
            }

            // Cannot be empty
            if (count == 0)
            {
                // An empty array is not allowed.
                throw new ArgumentException(SR.Get(SRID.ApplicationGestureArrayLengthIsZero), "applicationGestures");
            }

            bool foundAllGestures = false;
            List <ApplicationGesture> gestures = new List <ApplicationGesture>();

            foreach (ApplicationGesture gesture in applicationGestures)
            {
                if (!ApplicationGestureHelper.IsDefined(gesture))
                {
                    throw new ArgumentException(SR.Get(SRID.ApplicationGestureIsInvalid), "applicationGestures");
                }

                //check for allgestures
                if (gesture == ApplicationGesture.AllGestures)
                {
                    foundAllGestures = true;
                }

                //check for dupes
                if (gestures.Contains(gesture))
                {
                    throw new ArgumentException(SR.Get(SRID.DuplicateApplicationGestureFound), "applicationGestures");
                }

                gestures.Add(gesture);
            }

            // AllGesture cannot be specified with other gestures
            if (foundAllGestures && gestures.Count != 1)
            {
                // no dupes allowed
                throw new ArgumentException(SR.Get(SRID.AllGesturesMustExistAlone), "applicationGestures");
            }

            return(gestures.ToArray());
        }