--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/extras/calcsoft/src/CalcEditline.cpp Wed Sep 01 12:29:54 2010 +0100
@@ -0,0 +1,376 @@
+/*
+* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0""
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Helper class used by CalcDocument,CCalcContainer etc.,
+* TCalcEditLine.
+* The numerical value and the character sequence of
+* the real number are held. Addition of a numerical character
+* sequence and which clear operation are performed.
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "CalcDoc.h"
+#include "CalcEditline.h"
+#include "CalcEnv.h"
+
+
+// LOCAL CONSTANTS AND MACROS
+
+
+// ================= MEMBER FUNCTIONS =======================
+
+
+// C++ default constructor can NOT contain any code, that
+// might leave.
+//
+TCalcEditLine::TCalcEditLine():
+ iNumber(0),
+ iOperator(ECalcOperatorNone)
+ {
+ }
+
+TCalcEditLine::~TCalcEditLine()
+ {
+ }
+
+// Copy constructor
+TCalcEditLine::TCalcEditLine
+ (const TCalcEditLine& aEditLine)
+ {
+ *this = aEditLine;
+ }
+
+// Assignment operator
+const TCalcEditLine& TCalcEditLine::operator=
+ (const TCalcEditLine& aEditLine)
+ {
+ iNumber = aEditLine.iNumber;
+ iOperator = aEditLine.iOperator;
+ return *this;
+ }
+
+
+// ---------------------------------------------------------
+// TCalcEditLine::AllClear
+// This function exists because long-press clear-key event is executed.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::AllClear()
+ {
+ iNumber.Zero();
+ iOperator = ECalcOperatorNone;
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::ClearL
+// This function exists because short-press clear-key event is executed.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::ClearL()
+ {
+ TInt length(iNumber.Length());
+ if (length > 1)
+ {
+ CCalcAppEnv* env = CCalcAppEnv::Static();
+ TChar minusIndicator(env->MinusIndicator());
+ if (iNumber[0] == (TUint) minusIndicator && // Casted for THUMB build
+ length == 2)
+ {
+ SetNumber(0);
+ }
+ else
+ {
+ iNumber.Delete(length - 1, 1);
+ length--;
+ if (length == 2 && iNumber[0] == (TUint) minusIndicator &&
+ // Casted for THUMB build
+ NumberL() == 0.0)
+ {
+ SetNumber(0);
+ }
+ }
+ }
+ else
+ {
+ SetNumber(0);
+ }
+ }
+
+
+// ---------------------------------------------------------
+// TCalcEditLine::ClearOperand
+// Set number of editor "0".
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::ClearOperand()
+ {
+ SetNumber(0);
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::NumberL
+// Convert from TBuf<> to number.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+TReal64 TCalcEditLine::NumberL() const
+ {
+ TLex lex(iNumber);
+ TReal64 data;
+ TInt errorCode(lex.Val(data));
+ // Converting is failed.
+ if (errorCode)
+ {
+ User::Leave(errorCode);
+ }
+ return data;
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::SetNumber
+// Convert from number to TBuf<>.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::SetNumber
+ (TReal64 aNumber)
+ {
+ // Set data format.
+ TRealFormat realFormat( KCalcMaxEditNumberWidth, KCalcMaxDigits );
+ if ( aNumber >= 0 )
+ {
+ realFormat.iWidth--;
+ }
+ realFormat.iType = KRealFormatNoExponent;
+ realFormat.iTriLen = 0; // Delimit character is nothing
+ CCalcAppEnv* env = CCalcAppEnv::Static();
+ TChar separator(env->DecimalSeparator());
+ realFormat.iPoint = separator;
+
+ TInt code = iNumber.Num(aNumber, realFormat);
+
+ if(KErrOverflow == code || KErrUnderflow == code)
+ {
+ // Set data format
+ TRealFormat realFormat(KCalcMaxNumberWidth);
+ if ( aNumber >= 0 )
+ {
+ realFormat.iWidth--;
+ }
+ realFormat.iType = KRealFormatExponent;
+ realFormat.iPlaces = 3;
+ realFormat.iTriLen = 0; // Delimit character is nothing
+ CCalcAppEnv* env = CCalcAppEnv::Static();
+ TChar separator(env->DecimalSeparator());
+ realFormat.iPoint = separator;
+ code = iNumber.Num(aNumber, realFormat);
+ }
+
+ switch (code)
+ {
+ case KErrOverflow:
+ {
+ TRAP_IGNORE( User::Leave( KErrOverflow ) );
+ break;
+ }
+ case KErrUnderflow:
+ {
+ iNumber.Num(0,0);
+ break;
+ }
+ default:
+ {
+ break;
+ }
+ }
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::AppendL
+// This function exists to handle numeric or "#" key event.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::AppendL
+ (TChar aInput) // Input type is digit or decimal point only
+ {
+ // Check whether editline is not full
+ if ( iNumber.Length() < KCalcMaxNumberWidth )
+ {
+ if ( aInput.IsDigit() )
+ {
+ if ( NumberDigits() < KCalcMaxDigits )
+ {
+ if (CheckZeroL())
+ {
+ iNumber.Zero();
+ }
+ iNumber.Append(aInput);
+ }
+ else
+ {
+ // If editor space is full, error code returned.
+ User::Leave(KCalcErrEditorSpaceFull);
+ }
+ }
+ // If decimal point do not exist, decimal point is added
+ // But editor has 8 dights, decimal point is not added.
+ else
+ {
+ CCalcAppEnv* env = CCalcAppEnv::Static();
+ TChar separator(env->DecimalSeparator());
+ if ( iNumber.Length() )
+ {
+ if ( iNumber.Locate(separator) == KErrNotFound )
+ {
+ if (NumberDigits() < KCalcMaxDigits)
+ {
+ iNumber.Append(separator);
+ }
+ }
+ }
+ else
+ {
+ SetNumber(0);
+ iNumber.Append(separator);
+ }
+ }
+ }
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::AppendNumberString
+// This function appends a character after the number.
+// Used for example in percent calculations.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::AppendNumberStringL
+ (TChar aChar)
+ {
+ // This kind of a paranoid check as when this function
+ // is called the amount of digits can never be more
+ // than 8. Because the iNumber is going
+ // to the output sheet we can display 10 characters
+ // 8 digits + operator + aChar
+ if ( NumberDigits() < KCalcMaxDigits + 1 )
+ {
+ iNumber.Append(aChar);
+ }
+ else
+ {
+ // If editor space is full, error code returned.
+ User::Leave(KCalcErrEditorSpaceFull);
+ }
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::ChangeSignL
+// This function exists to handle "Change Sign" command
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::ChangeSignL()
+ {
+ TInt length(iNumber.Length());
+
+ // If the number is zero or empty, this command is ignored
+ if ((length > 0) && (NumberL() != 0.0))
+ {
+ CCalcAppEnv* env = CCalcAppEnv::Static();
+ TChar minusIndicator(env->MinusIndicator());
+ // If the number is less than zero, '-' is deleted.
+ if ( iNumber[0] == (TUint) minusIndicator ) // Casted for THUMB build
+ {
+ iNumber.Delete(0, 1);
+ }
+ // Case number is more than zero.
+ else
+ {
+ TBuf<1> buf;
+ buf.Append(minusIndicator);
+ iNumber.Insert(0, buf);
+ }
+ }
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::TrimZeroL
+// If number of editor is "iii.ddd000...", set number "iii.ddd".
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::TrimZeroL()
+ {
+ TReal64 realValue(NumberL());
+ SetNumber(realValue);
+ }
+
+
+// ---------------------------------------------------------
+// TCalcEditLine::CheckZero
+// For checking that editline is cleared.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+TBool TCalcEditLine::CheckZeroL() const
+ {
+ return ((iNumber.Length() == 1) && (NumberL() == 0.0));
+ }
+
+// ---------------------------------------------------------
+// TCalcEditLine::ChangeDecimal
+// Changing decimal separator.
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void TCalcEditLine::ChangeDecimal(TChar aOld, TChar aNew)
+ {
+ TInt pos(iNumber.Locate(aOld));
+
+ if (pos != KErrNotFound)
+ {
+ iNumber[pos] = (TUint16) aNew;
+ }
+ }
+
+
+// ---------------------------------------------------------
+// TCalcEditLine::NumberDigits
+// To count of digits in a line
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+TInt TCalcEditLine::NumberDigits() const
+ {
+ TInt len(iNumber.Length());
+ TInt num(0);
+ for (TInt i(0); i < len; ++i)
+ {
+ TChar onechar(iNumber[i]);
+ if (onechar.IsDigit())
+ {
+ ++num;
+ }
+ }
+ return num;
+ }
+
+
+// End of File