examples/Base/Locale/Currency/Currency.cpp

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  may be used to endorse or promote products derived from this software
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Description:  
*/


#include "CommonFramework.h" // standard example framework

// advance declarations
void printCurrency();
void formatCurrency(TDes &aBuffer, TReal currencyAmount);


LOCAL_C void doExampleL()
    {
                // construct and initialize application data
                // Locale information includes whether there is a space between 
                // currency symbol and amount, whether negative currency amounts 
                // are enclosed in brackets, and whether digits to left of decimal 
                // separator are grouped in threes ("Triads"). 
        TLocale locale; // locale information
        TCurrencySymbol currencySymbol;
        currencySymbol.Set();   // Get system wide currency symbol setting
        locale.SetCurrencySymbolPosition(ELocaleBefore); 
        locale.SetCurrencySpaceBetween(EFalse); 
        locale.SetNegativeCurrencyFormat(TLocale::ELeadingMinusSign);
        locale.SetCurrencyDecimalPlaces(2);     
        locale.SetCurrencyTriadsAllowed(ETrue); 
        locale.SetThousandsSeparator(',');
        locale.SetDecimalSeparator('.');
        locale.Set();                   // set system default settings
        printCurrency();
        }

void printCurrency()
        {
        TBuf<30> aBuffer; // receives formatted currency string
        aBuffer.Zero(); // empty buffer
        TReal currencyAmount=-12345678.119;
        formatCurrency(aBuffer, currencyAmount);
        _LIT(KFormat1,"Currency value is: %S\n");
        console->Printf(KFormat1,&aBuffer);
        }
                
void formatCurrency(TDes &aBuffer, TReal currencyAmount)
        {
                //
                // Format the currency starting with the currency symbol 
                //
        TLocale locale;                 // System locale settings
        TRealFormat realFormat; 
                //
                // Set up a TRealFormat object from locale information.
                // This involves setting decimal and thousands separators, 
                // whether triads are allowed or not and number of decimal places.
                //
        realFormat.iType=KRealFormatFixed; // converts number to the form
                                           //"nnn.ddd" (n=integer, d=decimal) 
        realFormat.iWidth=30;              // Max. number of characters allowed
                                                                           // to  represent the number
        realFormat.iPlaces=locale.CurrencyDecimalPlaces(); 
        realFormat.iPoint=locale.DecimalSeparator(); 
        realFormat.iTriad=locale.ThousandsSeparator();
        realFormat.iTriLen=(locale.CurrencyTriadsAllowed() ? 1 : 0); 
        TCurrencySymbol symbol;                   // get currency symbol from
                                                                          // system setting
                        
        _LIT(KTxtOpenBra,"(");
        _LIT(KTxtSpace," ");
        _LIT(KTxtCloseBra,")");
        _LIT(KTxtMinusSign,"-");
                                                                          // Negative currency amounts may
                                                                          // be enclosed in brackets.
                                                                          // Currency symbol can appear before or
                                          // after the value.
                                          // We can have spaces between the currency
                                          // symbol and the value.
                                         
                                      
    TUint currencySymbolAtFront;
    TUint spaceBetweenSymbolAndValue;

                                      //
                                      // setup some useful values.    
                                      //
    currencySymbolAtFront      = ((locale.CurrencySymbolPosition()==ELocaleBefore) ? 0x01 : 0x00);
    spaceBetweenSymbolAndValue = (locale.CurrencySpaceBetween() ? 0x01 : 0x00);
                                      
                                      //
                                      // Deal with negative values
                                      //
    if (currencyAmount<0)
        {
                                      // Check if position of currency symbol needs to swap for 
                                      // for negavtive values
        currencySymbolAtFront ^= (locale.NegativeCurrencySymbolOpposite() ? 0x01 : 0x00);
        
                                      // Check if we need a space between currency symbol
                                      // and value.
        if (spaceBetweenSymbolAndValue && locale.NegativeLoseSpace())
            {
            spaceBetweenSymbolAndValue = 0x00;
            }
        
                                      // Now lay out the negative value as instructed. 
        switch (locale.NegativeCurrencyFormat())
            {
            case TLocale::ELeadingMinusSign :
                {
                aBuffer.Append(KTxtMinusSign);
                    if (currencySymbolAtFront)
                        {
                        aBuffer.Append(symbol);
                        if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.AppendNum(-currencyAmount,realFormat);
                        }
                    else
                        {
                        aBuffer.AppendNum(-currencyAmount,realFormat);
                        if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.Append(symbol);
                        }
                break;
                }
               
            case TLocale::ETrailingMinusSign :
                {
                if (currencySymbolAtFront)
                    {
                    aBuffer.Append(symbol);
                    if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.AppendNum(-currencyAmount,realFormat);
                        aBuffer.Append(KTxtMinusSign);
                    }
                else
                    {
                    aBuffer.AppendNum(-currencyAmount,realFormat);
                        aBuffer.Append(KTxtMinusSign);
                        if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.Append(symbol);
                    }
                break;
                }
            
            case TLocale::EInterveningMinusSign :
                {
                if (currencySymbolAtFront)
                    {
                    aBuffer.Append(symbol);
                    if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.AppendNum(currencyAmount,realFormat);        
                    }
                else
                    {
                    aBuffer.AppendNum(currencyAmount,realFormat);        
                    if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                        aBuffer.Append(symbol);
                    }
                break;
                }
                
            default : // EInBrackets is the only remaining option
                {
                aBuffer.Append(KTxtOpenBra);
                if (currencySymbolAtFront)
                    {
                    aBuffer.Append(symbol);
                    if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                    aBuffer.AppendNum(-currencyAmount,realFormat);
                    }
                else
                    {
                    aBuffer.AppendNum(-currencyAmount,realFormat);
                    if (spaceBetweenSymbolAndValue)
                            {
                            aBuffer.Append(KTxtSpace);
                            }
                    aBuffer.Append(symbol);
                    }
                        aBuffer.Append(KTxtCloseBra);
                        break;
                }
            
            }
        }
        
                                      //
                                      // Deal with zero or postive values
                                      //
    else
        {
        if (currencySymbolAtFront)
            {
            aBuffer.Append(symbol);
            if (spaceBetweenSymbolAndValue)
                    {
                    aBuffer.Append(KTxtSpace);
                    }
            aBuffer.AppendNum(currencyAmount,realFormat);
            }
        else
            {
            aBuffer.AppendNum(currencyAmount,realFormat);
            if (spaceBetweenSymbolAndValue)
                    {
                    aBuffer.Append(KTxtSpace);
                    }
            aBuffer.Append(symbol);
            }
        }
                
        }       

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