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Diffstat (limited to 'kcalc/dlabel.cpp')
| -rw-r--r-- | kcalc/dlabel.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/kcalc/dlabel.cpp b/kcalc/dlabel.cpp new file mode 100644 index 0000000..8c6c062 --- /dev/null +++ b/kcalc/dlabel.cpp @@ -0,0 +1,184 @@ +/* + $Id$ + + KCalc, a scientific calculator for the X window system using the + Qt 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 <qglobal.h> +#include <kactioncollection.h> +#include <kstdaction.h> + +#include "kcalc_settings.h" +#include "kcalc_core.h" +#include "dlabel.h" +#include "dlabel.moc" + + + +DispLogic::DispLogic(QWidget *parent, const char *name, + KActionCollection *coll) + :KCalcDisplay(parent,name), _history_index(0) +{ + KNumber::setDefaultFloatOutput(true); + KNumber::setDefaultFractionalInput(true); + _back = KStdAction::undo(this, SLOT(history_back()), coll); + _forward = KStdAction::redo(this, SLOT(history_forward()), coll); + + _forward->setEnabled(false); + _back->setEnabled(false); +} + +DispLogic::~DispLogic() +{ +} + +void DispLogic::changeSettings() +{ + QPalette pal = palette(); + + pal.setColor(QColorGroup::Text, KCalcSettings::foreColor()); + pal.setColor(QColorGroup::Foreground, KCalcSettings::foreColor()); + pal.setColor(QColorGroup::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); +} + |