DFConversion

A comprehensive unit conversion library for Delphi applications. The library provides conversion capabilities for various measurement categories including temperature, length, weight, volume, area, speed, time, energy, and pressure.

Features

• Multiple Conversion Categories: Convert between units in 9 different measurement categories
• Comprehensive Unit Support: Support for both metric and imperial measurement systems
• Easy to Use: Simple and intuitive API with clear method names
• Type Safety: Uses enumerated types to prevent invalid conversions
• Error Handling: Custom exception class for conversion errors
• Formatting Utility: Built-in method to format conversion results as readable strings
• Zero Dependencies: No external dependencies required

Installation

1. Add the DFConversion.pas file to your Delphi project
2. Add DFConversion to your unit's uses clause
3. Start converting!

Usage Examples

Temperature Conversion

// Convert from Celsius to Fahrenheit
var 
  TempC, TempF: Double;
begin
  TempC := 25;
  TempF := TDFConverter.ConvertTemperature(TempC, tuCelsius, tuFahrenheit);
  ShowMessage(Format('%.1f°C = %.1f°F', [TempC, TempF]));
  
  // Or use the formatting helper
  ShowMessage(TDFConverter.FormatConversion(
    TempC, TempF,
    TDFConverter.GetTemperatureUnitName(tuCelsius),
    TDFConverter.GetTemperatureUnitName(tuFahrenheit)
  ));
end;

Length Conversion

// Convert from meters to feet
var
  Meters, Feet: Double;
begin
  Meters := 10;
  Feet := TDFConverter.ConvertLength(Meters, luMeter, luFoot);
  ShowMessage(Format('%.2f meters = %.2f feet', [Meters, Feet]));
end;

Weight Conversion

// Convert from kilograms to pounds
var
  Kg, Lb: Double;
begin
  Kg := 70;
  Lb := TDFConverter.ConvertWeight(Kg, wuKilogram, wuPound);
  ShowMessage(Format('%.2f kg = %.2f lb', [Kg, Lb]));
end;

Available Unit Types

Temperature Units

• Celsius (°C)
• Fahrenheit (°F)
• Kelvin (K)

Length Units

• Meter (m)
• Kilometer (km)
• Centimeter (cm)
• Millimeter (mm)
• Mile (mi)
• Yard (yd)
• Foot (ft)
• Inch (in)

Weight Units

• Kilogram (kg)
• Gram (g)
• Milligram (mg)
• Metric Ton (t)
• Pound (lb)
• Ounce (oz)

Volume Units

• Liter (L)
• Milliliter (mL)
• Cubic Meter (m³)
• Gallon (US) (gal)
• Quart (US) (qt)
• Pint (US) (pt)
• Cup (US)
• Fluid Ounce (US) (fl oz)

Area Units

• Square Meter (m²)
• Square Kilometer (km²)
• Hectare (ha)
• Square Foot (ft²)
• Square Yard (yd²)
• Acre
• Square Mile (mi²)

Speed Units

• Meters per Second (m/s)
• Kilometers per Hour (km/h)
• Miles per Hour (mph)
• Knot (kn)

Time Units

• Second (s)
• Minute (min)
• Hour (h)
• Day (d)
• Week (w)
• Year (y)

Energy Units

• Joule (J)
• Kilojoule (kJ)
• Calorie (cal)
• Kilocalorie (kcal)
• Watt Hour (Wh)
• Kilowatt Hour (kWh)

Pressure Units

• Pascal (Pa)
• Kilopascal (kPa)
• Bar
• PSI (lb/in²)
• Atmosphere (atm)

Complete Example

Below is a complete example showing how to use the library in a console application:

program ConversionExample;

{$APPTYPE CONSOLE}

uses
  System.SysUtils,
  DFConversion;

begin
  try
    // Convert 25°C to Fahrenheit
    var Celsius := 25.0;
    var Fahrenheit := TDFConverter.ConvertTemperature(Celsius, tuCelsius, tuFahrenheit);
    Writeln(Format('%.2f°C = %.2f°F', [Celsius, Fahrenheit]));
    
    // Convert 10 kilometers to miles
    var Kilometers := 10.0;
    var Miles := TDFConverter.ConvertLength(Kilometers * 1000, luMeter, luMile);
    Writeln(Format('%.2f km = %.2f miles', [Kilometers, Miles]));
    
    // Convert 1 gallon to liters
    var Gallons := 1.0;
    var Liters := TDFConverter.ConvertVolume(Gallons, vuGallon, vuLiter);
    Writeln(Format('%.2f gallons = %.2f liters', [Gallons, Liters]));
    
    Writeln('Press Enter to exit...');
    Readln;
  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
end.

Extending the Library

The library is designed to be easily extensible. To add new unit types or conversion categories:

1. Add the new units to the appropriate enumeration or create a new enumeration
2. Implement the conversion method for the new category
3. Add a unit name retrieval method for the new category

License

This library is released under the MIT License.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Author

DF Libraries Team