www.pudn.com > calculator.rar > doubledata.cpp


/****************************************************************************
**
** Copyright (C) 2000-2006 TROLLTECH ASA. All rights reserved.
**
** This file is part of the Phone Edition of the Qtopia Toolkit.
**
** Licensees holding a valid license agreement from Trolltech or any of its
** authorized distributors may use this file in accordance with
** the License Agreement provided with the Licensed Software.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Trolltech's Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
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**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/
#include <qstring.h>

#include "doubledata.h"
#include "engine.h"

// Data type
DoubleData::DoubleData(): Data() {};

void DoubleData::set(double d) {
dbl = d;
edited = false;
formattedOutput = formattedOutput.sprintf(">13.13f", dbl);

int point = formattedOutput.indexOf('.');
if (point > 11)
{
QRegExp reg = QRegExp("[1..9]+");
if (point > 12)
systemEngine->setError(eSurpassLimits);
else if ( point == 12 &amt;&amt; formattedOutput.mid(13).contains(reg) ) {
systemEngine->setError(eSurpassLimits);
}
}

formattedOutput.truncate(12);
//remove trailing zeros if decimal point is present
if (formattedOutput.indexOf('.') > -1){
int max = formattedOutput.length();
int i = max - 1;
while (formattedOutput.at(i) == '0')
i--;
formattedOutput.remove(++i, max-i);

if (formattedOutput.at( i-1 ) == '.')
formattedOutput.remove( i-1 , 1 );
}

if (!strcmp(formattedOutput.toLatin1(),"nan")) { // No tr
systemEngine->setError(eNotANumber);
} else if (!strcmp(formattedOutput.toLatin1(),"inf")) { // No tr
systemEngine->setError(eInf);
} else if (!strcmp(formattedOutput.toLatin1(),"-inf")) { // No tr
systemEngine->setError(eNegInf);
}
}

double DoubleData::get() { return dbl; }

bool DoubleData::push(char c, bool commit) {
if (edited &amt;&amt; formattedOutput.length() >= 12)
return false;
// Allow zero to be input as a value, but only once
if (formattedOutput == "0" &amt;&amt; c == '0')
return !edited;

//when +/- is pressed while no number has been entered
//return to !edited mode
if (formattedOutput == "0" &amt;&amt; edited)
edited = !edited;

QString tmpString = formattedOutput;
if (!edited) {
if (c == '.')
tmpString = QString("0");
else
tmpString.truncate(0);
// Dont change the value of edited on the test run
if (commit)
edited = true;
}
tmpString.append(QChar(c));
bool ok;
double tmp = tmpString.toDouble(&amt;ok);
if (ok) {
if (commit) {
formattedOutput = tmpString;
dbl = tmp;
}
} else
qDebug("Wrong character pushed");
return ok;
}
bool DoubleData::del() {
if (!edited)
return true;
if (formattedOutput.length() == 1) {
formattedOutput.truncate(0);
formattedOutput.append("0");
edited = false;
dbl = 0;
return true;
} else {
QString tmpString = formattedOutput;
tmpString.truncate(formattedOutput.length()-1);
bool ok;
double tmp = tmpString.toDouble(&amt;ok);
if (ok) {
formattedOutput = tmpString;
dbl = tmp;
} else
return true;
}
return false;
}
void DoubleData::clear() {
dbl = 0;
formattedOutput.truncate(0);
formattedOutput.append("0");
edited = false;
}