141 lines
4.2 KiB
C#
141 lines
4.2 KiB
C#
//-------------------------------------------------------------
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// <copyright company=’Microsoft Corporation’>
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// Copyright © Microsoft Corporation. All Rights Reserved.
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// </copyright>
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//-------------------------------------------------------------
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// @owner=alexgor, deliant
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//=================================================================
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// File: ElementPositionConverter.cs
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//
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// Namespace: DataVisualization.Charting.Design
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//
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// Classes: ElementPositionConverter
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//
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// Purpose: Converter of the element position.
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//
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// Reviewed: AG - August 7, 2002
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//
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//===================================================================
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#region Used Namespaces
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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Globalization;
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#if Microsoft_CONTROL
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using System.Windows.Forms.DataVisualization.Charting;
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#else
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using System.Web.UI.DataVisualization.Charting;
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#endif
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#endregion
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#if Microsoft_CONTROL
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namespace System.Windows.Forms.DataVisualization.Charting
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#else
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namespace System.Web.UI.DataVisualization.Charting
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#endif
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{
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/// <summary>
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/// Element position converter.
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/// </summary>
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internal class ElementPositionConverter : ExpandableObjectConverter
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{
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#region Converter methods
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/// <summary>
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/// Overrides the CanConvertFrom method of TypeConverter.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="sourceType">Convertion source type.</param>
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/// <returns>Indicates if convertion is possible.</returns>
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
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{
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if(sourceType == typeof(string))
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{
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return true;
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}
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return base.CanConvertFrom(context, sourceType);
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}
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/// <summary>
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/// Overrides the CanConvertTo method of TypeConverter.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="destinationType">Destination type.</param>
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/// <returns>Indicates if convertion is possible.</returns>
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public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
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{
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if (destinationType == typeof(string))
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{
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return true;
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}
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return base.CanConvertTo(context, destinationType);
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}
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/// <summary>
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/// Overrides the ConvertTo method of TypeConverter.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="culture">Culture information.</param>
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/// <param name="value">Value to convert.</param>
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/// <param name="destinationType">Convertion destination type.</param>
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/// <returns>Converted object.</returns>
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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if (destinationType == typeof(string))
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{
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return ((ElementPosition)value).ToString();
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}
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return base.ConvertTo(context, culture, value, destinationType);
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}
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/// <summary>
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/// Overrides the ConvertFrom method of TypeConverter.
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/// Converts from string with comma separated values.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="culture">Culture information.</param>
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/// <param name="value">Value to convert from.</param>
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/// <returns>Indicates if convertion is possible.</returns>
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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string posValue = value as string;
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if(posValue != null)
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{
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if (String.Compare(posValue, Constants.AutoValue, StringComparison.OrdinalIgnoreCase) == 0)
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{
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return new ElementPosition();
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}
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else
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{
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string[] array = posValue.Split(',');
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if(array.Length == 4)
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{
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return new ElementPosition(
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float.Parse(array[0], System.Globalization.CultureInfo.CurrentCulture),
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float.Parse(array[1], System.Globalization.CultureInfo.CurrentCulture),
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float.Parse(array[2], System.Globalization.CultureInfo.CurrentCulture),
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float.Parse(array[3], System.Globalization.CultureInfo.CurrentCulture));
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}
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else
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{
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throw(new ArgumentException( SR.ExceptionElementPositionConverter ));
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}
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}
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}
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return base.ConvertFrom(context, culture, value);
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}
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#endregion
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}
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}
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