89 lines
3.3 KiB
C#
89 lines
3.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace GraphingCalculator.IO
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{
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public class ExpressionFile
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{
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private List<VisualExpression> expressions = new List<VisualExpression>();
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public List<VisualExpression> Expressions { get { return expressions; } }
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public void SaveToFile(string filename)
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{
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System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(filename, new System.Xml.XmlWriterSettings() { Indent = true });
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writer.WriteStartDocument();
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writer.WriteStartElement("Document");
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// Write expressions
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writer.WriteStartElement("ExpressionList");
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foreach (var i in Expressions)
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{
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writer.WriteStartElement("Expression");
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writer.WriteAttributeString("String", i.ExpressionString);
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writer.WriteAttributeString("IsVisible", i.IsVisible.ToString());
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writer.WriteAttributeString("Color", i.Color.ToString());
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foreach (var j in i.Variables)
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{
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writer.WriteStartElement("Variable");
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writer.WriteAttributeString("Key", j.Key);
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writer.WriteAttributeString("Value", j.Value.ToString());
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writer.WriteEndElement();
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}
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writer.WriteEndElement();
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}
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writer.WriteEndElement();
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// Finish
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writer.WriteEndElement();
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writer.WriteEndDocument();
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writer.Close();
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}
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public void LoadFromFile(string filename)
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{
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System.Xml.XmlReader reader = System.Xml.XmlReader.Create(filename);
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string varKey = "", varVal = "";
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VisualExpression expr;
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while (reader.Read())
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switch (reader.NodeType)
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{
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case System.Xml.XmlNodeType.Element:
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// Read an expression
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if (reader.Name == "Expression")
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{
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expr = new VisualExpression();
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while (reader.MoveToNextAttribute()) {
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if (reader.Name == "String") expr.ExpressionString = reader.Value;
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else if (reader.Name == "IsVisible") expr.IsVisible = bool.Parse(reader.Value);
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else if (reader.Name == "Color") expr.Color = (System.Windows.Media.Color) System.Windows.Media.ColorConverter.ConvertFromString(reader.Value);
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}
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this.Expressions.Add(expr);
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}
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// A variable
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else if (reader.Name == "Variable")
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{
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while (reader.MoveToNextAttribute()) {
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if (reader.Name == "Key") varKey = reader.Value;
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else if (reader.Name == "Value") varVal = reader.Value;
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}
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if (varKey != "")
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this.Expressions.Last().Variables[varKey] = double.Parse(varVal);
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}
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break;
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}
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reader.Close();
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}
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}
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}
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