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//-------------------------------------------------------------
// <copyright company=Microsoft Corporation>
// Copyright Microsoft Corporation. All Rights Reserved.
// </copyright>
//-------------------------------------------------------------
// @owner=alexgor, deliant
//=================================================================
// File: MapAreaCoordinatesConverter.cs
//
// Namespace: System.Web.UI.DataVisualization.Charting
//
// Classes: MapAreaCoordinatesConverter
//
// Purpose: Design-time converter for map area coordinates
//
// Reviewed: AG - August 7, 2002
//
//===================================================================
using System.ComponentModel;
using System.Globalization;
namespace System.Web.UI.DataVisualization.Charting
{
/// <summary>
/// Converter for the array of map area coordinates
/// </summary>
internal class MapAreaCoordinatesConverter : ArrayConverter
{
/// <summary>
/// Overrides the CanConvertFrom method of TypeConverter.
/// The ITypeDescriptorContext interface provides the context for the
/// conversion. Typically this interface is used at design time to
/// provide information about the design-time container.
/// </summary>
/// <param name="context">Descriptor context.</param>
/// <param name="sourceType">Convertion source type.</param>
/// <returns>Indicates if convertion is possible.</returns>
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof(string))
{
return true;
}
return base.CanConvertFrom(context, sourceType);
}
/// <summary>
/// Overrides the ConvertFrom method of TypeConverter.
/// Convert from comma separated values in the string.
/// </summary>
/// <param name="context">Descriptor context.</param>
/// <param name="culture">Culture information.</param>
/// <param name="value">Value to convert from.</param>
/// <returns>Indicates if convertion is possible.</returns>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
// Can convert from string where each array element is separated by comma
string stringValue = value as string;
if (stringValue != null)
{
string[] values = stringValue.Split(new char[] { ',' });
float[] array = new float[values.Length];
for (int index = 0; index < values.Length; index++)
{
array[index] = float.Parse(values[index], System.Globalization.CultureInfo.CurrentCulture);
}
return array;
}
// Call base class
return base.ConvertFrom(context, culture, value);
}
/// <summary>
/// Overrides the ConvertTo method of TypeConverter.
/// Convert coordinates array to comma separated values in string.
/// </summary>
/// <param name="context">Descriptor context.</param>
/// <param name="culture">Culture information.</param>
/// <param name="value">Value to convert.</param>
/// <param name="destinationType">Convertion destination type.</param>
/// <returns>Converted object.</returns>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof(string))
{
float[] array = (float[])value;
string result = "";
foreach (float d in array)
{
result += d.ToString(System.Globalization.CultureInfo.CurrentCulture) + ",";
}
return result.TrimEnd(',');
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
}
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