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