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/*
$Id$
KCalc, a scientific calculator for the X window system using the
TQt widget libraries, available at no cost at http://www.troll.no
Copyright (C) 1996 Bernd Johannes Wuebben
wuebben@math.cornell.edu
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <tqglobal.h>
#include <kactioncollection.h>
#include <kstdaction.h>
#include "kcalc_settings.h"
#include "kcalc_core.h"
#include "dlabel.h"
#include "dlabel.moc"
DispLogic::DispLogic(TQWidget *tqparent, const char *name,
KActionCollection *coll)
:KCalcDisplay(tqparent,name), _history_index(0)
{
KNumber::setDefaultFloatOutput(true);
KNumber::setDefaultFractionalInput(true);
_back = KStdAction::undo(TQT_TQOBJECT(this), TQT_SLOT(history_back()), coll);
_forward = KStdAction::redo(TQT_TQOBJECT(this), TQT_SLOT(history_forward()), coll);
_forward->setEnabled(false);
_back->setEnabled(false);
}
DispLogic::~DispLogic()
{
}
void DispLogic::changeSettings()
{
TQPalette pal = palette();
pal.setColor(TQColorGroup::Text, KCalcSettings::foreColor());
pal.setColor(TQColorGroup::Foreground, KCalcSettings::foreColor());
pal.setColor(TQColorGroup::Background, KCalcSettings::backColor());
setPalette(pal);
setBackgroundColor(KCalcSettings::backColor());
setFont(KCalcSettings::font());
setPrecision(KCalcSettings::precision());
if(KCalcSettings::fixed() == false)
setFixedPrecision(-1);
else
setFixedPrecision(KCalcSettings::fixedPrecision());
setBeep(KCalcSettings::beep());
setGroupDigits(KCalcSettings::groupDigits());
updateDisplay();
}
void DispLogic::update_from_core(CalcEngine const &core,
bool store_result_in_history)
{
bool tmp_error;
KNumber const & output = core.lastOutput(tmp_error);
if(tmp_error) sendEvent(EventError);
if (setAmount(output) && store_result_in_history &&
output != KNumber::Zero)
{
// add this latest value to our history
_history_list.insert(_history_list.begin(), output);
_history_index = 0;
_back->setEnabled(true);
_forward->setEnabled(false);
}
}
void DispLogic::EnterDigit(int data)
{
char tmp;
switch(data)
{
case 0:
tmp = '0';
break;
case 1:
tmp = '1';
break;
case 2:
tmp = '2';
break;
case 3:
tmp = '3';
break;
case 4:
tmp = '4';
break;
case 5:
tmp = '5';
break;
case 6:
tmp = '6';
break;
case 7:
tmp = '7';
break;
case 8:
tmp = '8';
break;
case 9:
tmp = '9';
break;
case 0xA:
tmp = 'A';
break;
case 0xB:
tmp = 'B';
break;
case 0xC:
tmp = 'C';
break;
case 0xD:
tmp = 'D';
break;
case 0xE:
tmp = 'E';
break;
case 0xF:
tmp = 'F';
break;
default:
tmp = '?';
break;
}
newCharacter(tmp);
}
void DispLogic::history_forward()
{
Q_ASSERT(! _history_list.empty());
Q_ASSERT(_history_index > 0);
_history_index --;
setAmount(_history_list[_history_index]);
if(_history_index == 0) _forward->setEnabled(false);
_back->setEnabled(true);
}
void DispLogic::history_back()
{
Q_ASSERT(! _history_list.empty());
Q_ASSERT( _history_index < static_cast<int>(_history_list.size()) );
setAmount(_history_list[_history_index]);
_history_index ++;
if( _history_index == static_cast<int>(_history_list.size()) )
_back->setEnabled(false);
_forward->setEnabled(true);
}
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