S60 3rd Edition SDK for Symbian OS Example Applications Guide

LandmarksUtils.cpp

/*
* ==============================================================================
*  Name        : LandmarksViewDialog.cpp
*  Part of     : Landmark Reference Application
*  Interface   : -
*  Description : Implements the CLandmarksViewDialog class
*  Version     : 1.0
*
*  Copyright (c) 2004-2006 Nokia Corporation.
*  This material, including documentation and any related 
*  computer programs, is protected by copyright controlled by 
*  Nokia Corporation.
* ==============================================================================
*/

// INCLUDE FILES
#include <e32std.h>
#include <e32math.h>

#include "LandmarksUtils.h"
#include "LandmarksCommonData.h"

// ============================= STATIC FUNCTIONS ===============================

// -----------------------------------------------------------------------------
// LandmarksUtils::FloatToDesL
// -----------------------------------------------------------------------------
//
void LandmarksUtils::FloatToDesL(TReal aFloat, TDes& aDes, TRealFormat aRealFormat)
    {
    if (Math::IsNaN(aFloat))
        {
        aDes = KNullDesC;
        }
    else
        {
        User::LeaveIfError(aDes.Num(aFloat, aRealFormat));
        }
    }

// -----------------------------------------------------------------------------
// LandmarksUtils::FloatToDesL
// -----------------------------------------------------------------------------
//
void LandmarksUtils::LatLongToDes(TReal aFloat, TDes& aDes)
    {
    if (Math::IsNaN(aFloat))
        {
        aDes = KNullDesC;
        }
    else
        {
        aDes.Format(KLatLongFormat, aFloat);
        }
    }

// -----------------------------------------------------------------------------
// LandmarksUtils::FloatToDesL
// -----------------------------------------------------------------------------
//
void LandmarksUtils::LatLongFloatToDegMinSecDesL(TReal aLatLong, TDes& aDes)
    {
    if (!Math::IsNaN(aLatLong))
        {
        // Convert to deg min sec
        SDegMinSec degMinSec;

        // Fetch degrees
        User::LeaveIfError(Math::Int(degMinSec.iDegrees, Abs(aLatLong)));

        // Fetch minutes
        TReal minutes = (Abs(aLatLong) - degMinSec.iDegrees) * KMinutesPerDegree;
        User::LeaveIfError(Math::Int(degMinSec.iMinutes, minutes));

        // Fetch seconds
        degMinSec.iSeconds = 
            ((minutes - degMinSec.iMinutes) * KSecondsPerMinute);

        // Check if seconds is going to be rounded to 60
        const TReal KMaxSeconds = 59.999;
        if (degMinSec.iSeconds > KMaxSeconds)
            {
            degMinSec.iSeconds = 0;
            degMinSec.iMinutes++;
            if (degMinSec.iMinutes == KMinutesPerDegree)
                {
                degMinSec.iMinutes = 0;
                degMinSec.iDegrees++;
                // We do not need to check if degress > 90 or if degrees > 180.
                // Landmarks FW takes care of that.
                }
            }

        // Format output descriptor
        if (aLatLong >= 0)
            {
            aDes.Format(KListBoxLatLongFormat, &KPositiveSign, 
                degMinSec.iDegrees, KDegreeSign, degMinSec.iMinutes, 
                degMinSec.iSeconds);
            }
        else
            {
            aDes.Format(KListBoxLatLongFormat, &KNegativeSign, 
                Abs(degMinSec.iDegrees), KDegreeSign, Abs(degMinSec.iMinutes), 
                Abs(degMinSec.iSeconds));
            }
        }
    else
        {
        aDes.Zero();
        }
    }

// -----------------------------------------------------------------------------
// LandmarksUtils::Panic
// -----------------------------------------------------------------------------
//
void LandmarksUtils::Panic(TInt aReason)
    {
    _LIT(KPanic, "LmRefApp bug");
    User::Panic(KPanic, aReason);
    }

---

© Nokia 2006