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OpenWPFChart: Assembling Charts from Components. Part II - Controls

, 26 Mar 2009
Chart controls composed from Chart Parts
SourceCode.zip
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ChartControls
ChartControls.csproj.user
OpenWPFChart.Chart.Icon.png
OpenWPFChart.WellLogChart.Icon.png
Properties
Themes
ChartHelpers
AxisPropertiesDialog
ChartHelpers.csproj.user
ChartScaleControl
FontChooser
ItemPropertiesDialog
Properties
ChartParts
Axes
ChartParts.csproj.user
Grid
Items
Data
DataView
Elements
Visuals
NumericalRecipes
Properties
Scales
SampleDataFiles
WellLog
Samples
ControlSamples
ColumnChartControlSample
Properties
Settings.settings
CurveChartControlSample
Properties
Settings.settings
r3xyqstb.tmp_proj
WellLogControlSample
Properties
Settings.settings
DirectCompositionSamples
BasicSample
Properties
Settings.settings
TemperatureSample
Properties
Settings.settings
WellLogSample
Properties
Settings.settings
// <copyright file="XMLDataFileParser.cs" company="Oleg V. Polikarpotchkin">
// Copyright © 2008-2009 Oleg V. Polikarpotchkin. All Right Reserved
// </copyright>
// <author>Oleg V. Polikarpotchkin</author>
// <email>ov-p@yandex.ru</email>
// <date>2009-03-09</date>
// <summary>OpenWPFChart library. XML Data File Parser.</summary>
// <revision>$Id: XMLDataFileParser.cs 19480 2009-03-23 07:27:31Z unknown $</revision>

using System;
using System.Collections; // For IList
using System.Collections.ObjectModel; // For ObservableCollection
using System.Xml;
using System.Diagnostics;
using OpenWPFChart.Parts;

namespace ColumnChartControlSample
{
	/// <summary>
	/// XML Data File Parser
	/// </summary>
	static class XMLDataFileParser
	{
		/// <summary>
		/// Parses the <paramref name="fileName"/> file.
		/// </summary>
		/// <param name="fileName">Name of the file.</param>
		/// <param name="xAxisLabel">The x axis label.</param>
		/// <returns><see cref="ItemData"/> collection from the <paramref name="fileName"/> file.</returns>
		/// <remarks>
		/// <para>XML data format doesn't presume any DTD or schema and all data validation is accoplished by the 
		/// application XML data parser. The XML, however, should be well-formed.</para>
		/// <para>Data file contents look like follows:</para>
		/// <code >
		/// &lt;?xml version="1.0" encoding="utf-8"?&gt;
		/// &lt;Items&gt;
		/// 	&lt;SampledCurve Name="y=x2" XAxisLabel="x"&gt;
		/// 		&lt;Point x="0" y="0"/&gt;
		/// 		...
		/// 		&lt;Point x="1" y="1"/&gt;
		/// 	&lt;/SampledCurve&gt;
		/// 	...
		/// 	&lt;ScatteredPoints Name="Point Set 2"&gt;
		/// 		&lt;Point x="0.01" y="0.5"/&gt;
		/// 		...
		/// 		&lt;Point x="0.95" y="0.3"/&gt;
		/// 	&lt;/ScatteredPoints&gt;
		/// 	...
		/// &lt;/Items&gt;
		/// </code>
		/// <para>The root content element is introduced by Items tag. This element can contain any number of series. 
		/// In the sample snippet above two series are presented by their SampledCurve and ScatteredPoints elements.</para>
		/// <para>Name of the series element tag expresses the intention on the series usage. E.g. the SampledCurve would be treated by 
		/// an application as the set of the sampled curve points and the ScatteredPoints - as the set of points of the points cloud.
		/// Every series element may have Name and XAxisLabel attributes. The former corresponds to OpenWPFChart.Parts.ItemData.ItemName
		/// property and the latter can be used by an application to show the abscissas axis label.
		/// Specific series element may imply additional restrictions: e.g. SampledCurve element require its Point elements be
		/// ordered by abscissa (x) values.</para>
		/// <para>A series element must contain one or more Point elements.</para>
		/// <para>Every Point element must have x (for abscissa) and y (for ordinate) attributes.
		/// Point coordinate in the series values must be convertible to the same base type.
		/// Base type is determined by the first Point element attribute (x or y) values in the following manner:</para>
		/// <list type="ordered">
		/// <item>If the value can be converted to double, the base type is double.</item>
		/// <item>If the value can be converted to DateTime, the base type is DateTime.</item>
		/// <item>Otherwise the base type is string.</item>
		/// </list>
		/// </remarks>
		public static ObservableCollection<ItemData> Parse(string fileName, out string xAxisLabel)
		{
			xAxisLabel = null;
			ObservableCollection<ItemData> items = new ObservableCollection<ItemData>();
			using (XmlTextReader reader = new XmlTextReader(fileName))
			{
				while (reader.Read())
				{
					if (reader.NodeType == XmlNodeType.Element)
					{
						ItemData item = null;
						if (reader.Name == "SampledCurve")
							item = ParseSampledCurve(reader, out xAxisLabel);
						else if (reader.Name == "ScatteredPoints")
							item = ParseScatteredPoints(reader, out xAxisLabel);

						if (item != null)
							items.Add(item);
					}
				}
			}
			return items;
		}

		/// <summary>
		/// Parses the SampledCurve XML element.
		/// </summary>
		/// <param name="reader">The reader.</param>
		/// <param name="xAxisLabel">The x axis label.</param>
		/// <returns></returns>
		static ItemData ParseSampledCurve(XmlTextReader reader, out string xAxisLabel)
		{
			Debug.Assert(reader.NodeType == XmlNodeType.Element, "reader.NodeType == XmlNodeType.Element");
			Debug.Assert(reader.Name == "SampledCurve", "reader.Name == \"SampledCurve\"");
			
			// Item name.
			string name = reader["Name"];
			xAxisLabel = reader["XAxisLabel"];
			
			// Base types.
			Type xBaseType = BaseType(reader["XBaseType"]), yBaseType = BaseType(reader["YBaseType"]);
			// Point collection.
			IList points = TypedPointCollection(xBaseType, yBaseType);

			while (reader.Read())
			{
				if (reader.NodeType == XmlNodeType.Element)
				{
					if (reader.Name == "Point")
					{
						string strX = reader["x"];
						if (strX == null)
							throw new Exception("SampledCurve Point element x attribute missed.");
						string strY = reader["y"];
						if (strY == null)
							throw new Exception("SampledCurve Point element y attribute missed.");

						AddTypedPoint(points, strX, strY, xBaseType, yBaseType);
					}
					else
						throw new Exception(string.Format("Invalid SampledCurve element name {0}.", reader.Name));
				}
				else if (reader.NodeType == XmlNodeType.EndElement)
				{
					if (reader.Name == "SampledCurve")
						break;
				}
			}
			if (points.Count == 0)
				return null;

			if (xBaseType == typeof(double))
			{
				if (yBaseType == typeof(double))
				{
					SampledCurveData<double, double> itemData = new SampledCurveData<double, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					SampledCurveData<double, DateTime> itemData = new SampledCurveData<double, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					SampledCurveData<double, object> itemData = new SampledCurveData<double, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, object>>)points
					};
					return itemData;
				}
			}
			else if (xBaseType == typeof(DateTime))
			{
				if (yBaseType == typeof(double))
				{
					SampledCurveData<DateTime, double> itemData = new SampledCurveData<DateTime, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					SampledCurveData<DateTime, DateTime> itemData = new SampledCurveData<DateTime, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					SampledCurveData<DateTime, object> itemData = new SampledCurveData<DateTime, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, object>>)points
					};
					return itemData;
				}
			}
			else if (xBaseType == typeof(object))
			{
				if (yBaseType == typeof(double))
				{
					SampledCurveData<object, double> itemData = new SampledCurveData<object, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					SampledCurveData<object, DateTime> itemData = new SampledCurveData<object, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					SampledCurveData<object, object> itemData = new SampledCurveData<object, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, object>>)points
					};
					return itemData;
				}
			}
			return null;
		}

		/// <summary>
		/// Parses the ScatteredPoints XML element.
		/// </summary>
		/// <param name="reader">The reader.</param>
		/// <param name="xAxisLabel">The x axis label.</param>
		/// <returns></returns>
		static ItemData ParseScatteredPoints(XmlTextReader reader, out string xAxisLabel)
		{
			Debug.Assert(reader.NodeType == XmlNodeType.Element, "reader.NodeType == XmlNodeType.Element");
			Debug.Assert(reader.Name == "ScatteredPoints", "reader.Name == \"ScatteredPoints\"");
			
			// Item name.
			string name = reader["Name"];
			xAxisLabel = reader["XAxisLabel"];
			
			// Base types.
			Type xBaseType = BaseType(reader["XBaseType"]), yBaseType = BaseType(reader["YBaseType"]);
			// Point collection.
			IList points = TypedPointCollection(xBaseType, yBaseType);

			while (reader.Read())
			{
				if (reader.NodeType == XmlNodeType.Element)
				{
					if (reader.Name == "Point")
					{
						string strX = reader["x"];
						if (strX == null)
							throw new Exception("ScatteredPoints Point element x attribute missed.");
						string strY = reader["y"];
						if (strY == null)
							throw new Exception("ScatteredPoints Point element y attribute missed.");

						AddTypedPoint(points, strX, strY, xBaseType, yBaseType);
					}
					else
						throw new Exception(string.Format("Invalid ScatteredPoints element name {0}.", reader.Name));
				}
				else if (reader.NodeType == XmlNodeType.EndElement)
				{
					if (reader.Name == "ScatteredPoints")
						break;
				}
			}
			if (points.Count == 0)
				return null;

			if (xBaseType == typeof(double))
			{
				if (yBaseType == typeof(double))
				{
					ScatteredPointsData<double, double> itemData = new ScatteredPointsData<double, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					ScatteredPointsData<double, DateTime> itemData = new ScatteredPointsData<double, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					ScatteredPointsData<double, object> itemData = new ScatteredPointsData<double, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<double, object>>)points
					};
					return itemData;
				}
			}
			else if (xBaseType == typeof(DateTime))
			{
				if (yBaseType == typeof(double))
				{
					ScatteredPointsData<DateTime, double> itemData = new ScatteredPointsData<DateTime, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					ScatteredPointsData<DateTime, DateTime> itemData = new ScatteredPointsData<DateTime, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					ScatteredPointsData<DateTime, object> itemData = new ScatteredPointsData<DateTime, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<DateTime, object>>)points
					};
					return itemData;
				}
			}
			else if (xBaseType == typeof(object))
			{
				if (yBaseType == typeof(double))
				{
					ScatteredPointsData<object, double> itemData = new ScatteredPointsData<object, double>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, double>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(DateTime))
				{
					ScatteredPointsData<object, DateTime> itemData = new ScatteredPointsData<object, DateTime>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, DateTime>>)points
					};
					return itemData;
				}
				else if (yBaseType == typeof(object))
				{
					ScatteredPointsData<object, object> itemData = new ScatteredPointsData<object, object>()
					{
						ItemName = name,
						Points = (ObservableCollection<DataPoint<object, object>>)points
					};
					return itemData;
				}
			}
			return null;
		}

		/// <summary>
		/// Gets the Base Type from the string.
		/// </summary>
		/// <param name="strXBaseType">Type name string.</param>
		/// <returns></returns>
		static Type BaseType(string strBaseType)
		{
			Type baseType = typeof(double);
			switch (strBaseType)
			{
				case "DateTime":
					baseType = typeof(DateTime);
					break;
				case "String":
					baseType = typeof(object);
					break;
			}
			return baseType;
		}

		/// <summary>
		/// Gets the Typed point collection.
		/// </summary>
		/// <param name="xBaseType">Base x Type.</param>
		/// <param name="yBaseType">Base y Type.</param>
		/// <returns></returns>
		static IList TypedPointCollection(Type xBaseType, Type yBaseType)
		{
			// Point collection.
			IList points = null;
			if (xBaseType == typeof(double))
			{
				if (yBaseType == typeof(double))
					points = new ObservableCollection<DataPoint<double, double>>();
				else if (yBaseType == typeof(DateTime))
					points = new ObservableCollection<DataPoint<double, DateTime>>();
				else if (yBaseType == typeof(object))
					points = new ObservableCollection<DataPoint<double, object>>();
			}
			else if (xBaseType == typeof(DateTime))
			{
				if (yBaseType == typeof(double))
					points = new ObservableCollection<DataPoint<DateTime, double>>();
				else if (yBaseType == typeof(DateTime))
					points = new ObservableCollection<DataPoint<DateTime, DateTime>>();
				else if (yBaseType == typeof(object))
					points = new ObservableCollection<DataPoint<DateTime, object>>();
			}
			else if (xBaseType == typeof(object))
			{
				if (yBaseType == typeof(double))
					points = new ObservableCollection<DataPoint<object, double>>();
				else if (yBaseType == typeof(DateTime))
					points = new ObservableCollection<DataPoint<object, DateTime>>();
				else if (yBaseType == typeof(object))
					points = new ObservableCollection<DataPoint<object, object>>();
			}
			return points;
		}

		/// <summary>
		/// Adds the typed point to the typed point collection.
		/// </summary>
		/// <param name="points">The points.</param>
		/// <param name="strX">X string value.</param>
		/// <param name="strY">Y string value.</param>
		/// <param name="xBaseType">Base x Type.</param>
		/// <param name="yBaseType">Base y Type.</param>
		static void AddTypedPoint(IList points, string strX, string strY, Type xBaseType, Type yBaseType)
		{
			if (xBaseType == typeof(double))
			{
				if (yBaseType == typeof(double))
				{
					double x = double.Parse(strX);
					double y = double.Parse(strY);
					points.Add(new DataPoint<double, double>(x, y));
				}
				else if (yBaseType == typeof(DateTime))
				{
					double x = double.Parse(strX);
					DateTime y = DateTime.Parse(strY);
					points.Add(new DataPoint<double, DateTime>(x, y));
				}
				else if (yBaseType == typeof(object))
				{
					double x = double.Parse(strX);
					points.Add(new DataPoint<double, object>(x, strY));
				}
			}
			else if (xBaseType == typeof(DateTime))
			{
				if (yBaseType == typeof(double))
				{
					DateTime x = DateTime.Parse(strX);
					double y = double.Parse(strY);
					points.Add(new DataPoint<DateTime, double>(x, y));
				}
				else if (yBaseType == typeof(DateTime))
				{
					DateTime x = DateTime.Parse(strX);
					DateTime y = DateTime.Parse(strY);
					points.Add(new DataPoint<DateTime, DateTime>(x, y));
				}
				else if (yBaseType == typeof(object))
				{
					DateTime x = DateTime.Parse(strX);
					points.Add(new DataPoint<DateTime, object>(x, strY));
				}
			}
			else if (xBaseType == typeof(object))
			{
				if (yBaseType == typeof(double))
				{
					double y = double.Parse(strY);
					points.Add(new DataPoint<object, double>(strX, y));
				}
				else if (yBaseType == typeof(DateTime))
				{
					DateTime y = DateTime.Parse(strY);
					points.Add(new DataPoint<object, DateTime>(strX, y));
				}
				else if (yBaseType == typeof(object))
				{
					points.Add(new DataPoint<object, object>(strX, strY));
				}
			}
		}
	}
}

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About the Author

Oleg V. Polikarpotchkin
Team Leader
Russian Federation Russian Federation
No Biography provided

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