Add function parser

StructureHelper/Windows/MainGraph/FormulaViewModel.cs

@@ -23,8 +23,8 @@ namespace StructureHelper.Windows.MainGraph
         private const string DEFAULT_NAME = "Put function name here...";
         private const string DEFAULT_DESCRIPTION = "Put function description here...";
         private const string DEFAULT_FORMULA = "x^2";
-        private const double DEFAULT_LEFT_BOUND = -500;
-        private const double DEFAULT_RIGHT_BOUND = 500;
+        private const double DEFAULT_LEFT_BOUND = 1;
+        private const double DEFAULT_RIGHT_BOUND = 1000;
         private const int DEFAULT_STEP = 100;
         private const int MAX_STEP = 1000;
         public char GREATER { get; } = '\u2265';
@@ -171,6 +171,8 @@ namespace StructureHelper.Windows.MainGraph
             (Function as FormulaFunction).Step = Step;
             (Function as FormulaFunction).Formula = Formula;
             Function.Color = Color;
+            Function.MinArg = LeftBound;
+            Function.MaxArg = RightBound;
             var window = parameter as Window;
             if (LeftBound > RightBound)
             {

StructureHelper/Windows/MainGraph/GraphViewModel.cs

@@ -111,7 +111,7 @@ namespace StructureHelper.Windows.MainGraph
             f2.Name = "Формульная системная функция";
             f2.Formula = "x^2";
             f2.Step = 100;
-            f2.MinArg = -1000;
+            f2.MinArg = 1;
             f2.MaxArg = 1000;
             f2.IsUser = false;
             f2.Description = "Описание формульной системной функции";

StructureHelperCommon/Infrastructures/Interfaces/FunctionDecorator.cs

@@ -30,6 +30,7 @@ namespace StructureHelperCommon.Infrastructures.Interfaces
 
         public IShiftTraceLogger? TraceLogger { get; set; }
         public Color Color { get; set; }
+        public string Trace { get; set; }
 
         public FunctionDecorator(IOneVariableFunction function)
         {

StructureHelperCommon/Infrastructures/Interfaces/IOneVariableFunction.cs

@@ -25,6 +25,7 @@ namespace StructureHelperCommon.Infrastructures.Interfaces
         public double MinArg { get; set; }
         public double MaxArg { get; set; }
         public Color Color { get; set; }
+        public string Trace { get; set; }
         public ObservableCollection<IOneVariableFunction> Functions { get; set; }
         public bool Check();
         public double GetByX(double xValue);

StructureHelperCommon/Models/Functions/FormulaFunction.cs

@@ -13,11 +13,15 @@ using System.Windows.Documents;
 using StructureHelperCommon.Services;
 using LiveCharts.Wpf;
 using StructureHelperCommon.Services.ColorServices;
+using FunctionParser;
 
 namespace StructureHelperCommon.Models.Functions
 {
     public class FormulaFunction : IOneVariableFunction
     {
+        private double current_xValue;
+        private string formula;
+        private Expression expression;
         private const string COPY = "copy";
         public const string GROUP_TYPE_1 = "System function";
         public const string GROUP_TYPE_2 = "User function";
@@ -27,13 +31,36 @@ namespace StructureHelperCommon.Models.Functions
         public string Name { get; set; }
         public string Description { get ; set; }
         public int Step { get; set; }
-        public string Formula { get; set; }
+        public string Formula 
+        {
+            get
+            {
+                return formula;
+            }
+            set
+            {
+                formula = value;
+                Expression = new Expression(value, new string[] { "x" }, null);
+            }
+        }
+        public Expression Expression 
+        { 
+            get
+            {
+                return expression;
+            }                 
+            set
+            {
+                expression = value;
+            }
+        }
         public Guid Id => throw new NotImplementedException();
         public ObservableCollection<IOneVariableFunction> Functions { get; set; } = new ObservableCollection<IOneVariableFunction>();
         public double MinArg { get; set; }
         public double MaxArg { get; set; }
         public IShiftTraceLogger? TraceLogger { get; set; }
         public Color Color { get; set; }
+        public string Trace { get; set; }
 
         public FormulaFunction(bool isUser = false)
         {
@@ -55,7 +82,6 @@ namespace StructureHelperCommon.Models.Functions
         {
             throw new NotImplementedException();
         }
-
         public object Clone()
         {
             var formulaFunction = new FormulaFunction();
@@ -76,7 +102,9 @@ namespace StructureHelperCommon.Models.Functions
         public double GetByX(double xValue)
         {
             double yValue = 0;
-            yValue = Math.Round(Math.Pow(xValue, 2), 2); //Временно выражение квадратичной параболы, будет разбор выражения
+            current_xValue = xValue;
+            Check();
+            yValue = Math.Round(Expression.CalculateValue(new double[] { xValue }), 2);
             return yValue;
         }
         public GraphSettings GetGraphSettings()

StructureHelperCommon/Models/Functions/TableFunction.cs

@@ -34,6 +34,7 @@ namespace StructureHelperCommon.Models.Functions
         public double MaxArg { get; set; }
         public IShiftTraceLogger? TraceLogger { get; set; }
         public Color Color { get; set; }
+        public string Trace { get; set; }
 
         public TableFunction(bool isUser = false)
         {

StructureHelperCommon/StructureHelperCommon.csproj

@@ -15,6 +15,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Reference Include="FunctionParser">
+      <HintPath>..\..\FunctionParser\FunctionParser\bin\Debug\FunctionParser.dll</HintPath>
+    </Reference>
     <Reference Include="LoaderCalculator">
       <HintPath>..\StructureHelper\Libraries\LoaderCalculator.dll</HintPath>
     </Reference>