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Posted 30 Jul 2010

RTF Document Constructor Library

, 16 Aug 2010
Create Rich Text Format documents programatically.
using System;

namespace ESCommon
{
    public enum MetricUnit { Point, Millimeter, Centimeter, Inch }
    
    /// <summary>
    /// Converts twips to metric units, and metric units to twips
    /// </summary>
    public class TwipConverter
    {
        public const float 
            PointsInTwip = .05F,
            MillimetersInTwip = .0176389F,
            CentimetersInTwip = .0017639F,
            InchsInTwip = 1F / 1440,
 
            TwipsInPoint = 20,
            TwipsInMillimeter = 56.6929134F,
            TwipsInCentimeter = 566.9291339F,
            TwipsInInch = 1440F;

        private static float[]
            ToUnitConversion = new float[] {
                PointsInTwip,
                MillimetersInTwip,
                CentimetersInTwip,
                InchsInTwip,
            },
            ToTwipConversion = new float[] {
                TwipsInPoint,
                TwipsInMillimeter,
                TwipsInCentimeter,
                TwipsInInch,
            };

        /// <summary>
        /// Converts metric values to twips
        /// </summary>
        /// <param name="value">Value in metric units</param>
        /// <param name="unit">Unit which is used to specify the value</param>
        /// <returns>Value in twips</returns>
        public static int ToTwip(float value, MetricUnit unit)
        {   
            return (int)Math.Round(value * ToTwipConversion[(int)unit]);
        }

        /// <summary>
        /// Converts twips to points
        /// </summary>
        /// <param name="value">Value in twips</param>
        /// <returns>Value in points</returns>
        public static float ToPoint(int value)
        {
            return ToMetricUnit(value, MetricUnit.Point);
        }

        /// <summary>
        /// Converts twips to millimeters
        /// </summary>
        /// <param name="value">Value in twips</param>
        /// <returns>Value in millimeters</returns>
        public static float ToMillimeter(int value)
        {
            return ToMetricUnit(value, MetricUnit.Millimeter);
        }

        /// <summary>
        /// Converts twips to centimeters
        /// </summary>
        /// <param name="value">Value in twips</param>
        /// <returns>Value in centimeters</returns>
        public static float ToCentimeter(int value)
        {
            return ToMetricUnit(value, MetricUnit.Centimeter);
        }

        /// <summary>
        /// Converts twips to metric values
        /// </summary>
        /// <param name="value">Value in twips</param>
        /// <param name="unit">Metric unit to convert to</param>
        /// <returns>Value in specified metric units</returns>
        public static float ToMetricUnit(int value, MetricUnit unit)
        {
            return (float)Math.Round(value * ToUnitConversion[(int)unit]);
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Dima Popov
Software Developer Energoservice
Russian Federation Russian Federation
Dmitry lives in Arkhangelsk, Russia. He has developed C# applications since 2007.

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