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156 lines
4 KiB
C++
156 lines
4 KiB
C++
/*
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Copyright (C) 2001 - 2013 Evan Teran
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evan.teran@gmail.com
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Copyright (C) 1996 - 2000 Bernd Johannes Wuebben
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wuebben@kde.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef KCALCDISPLAY_H_
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#define KCALCDISPLAY_H_
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#include <QFrame>
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#include <QVector>
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#include "knumber.h"
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class CalcEngine;
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class KAction;
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#include <QTimer>
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#include <QStyleOptionFrame>
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#define NUM_STATUS_TEXT 4
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/*
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This class provides a pocket calculator display. The display has
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implicitely two major modes: One is for editing and one is purely
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for displaying.
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When one uses "setAmount", the given amount is displayed, and the
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amount which was possibly typed in before is lost. At the same time
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this new value can not be modified.
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On the other hand, "addNewChar" adds a new digit to the amount that
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is being typed in. If "setAmount" was used before, the display is
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cleared and a new input starts.
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TODO: Check overflows, number of digits and such...
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*/
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enum NumBase {
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NB_BINARY = 2,
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NB_OCTAL = 8,
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NB_DECIMAL = 10,
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NB_HEX = 16
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};
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class KCalcDisplay : public QFrame {
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Q_OBJECT
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public:
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explicit KCalcDisplay(QWidget *parent = 0);
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~KCalcDisplay();
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enum Event {
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EventReset, // resets display
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EventClear, // if no error reset display
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EventError,
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EventChangeSign
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};
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bool sendEvent(Event event);
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void deleteLastDigit();
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const KNumber &getAmount() const;
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void newCharacter(const QChar new_char);
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bool setAmount(const KNumber &new_amount);
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int setBase(NumBase new_base);
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void setBeep(bool flag);
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void setGroupDigits(bool flag);
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void setTwosComplement(bool flag);
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void setBinaryGrouping(int digits);
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void setOctalGrouping(int digits);
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void setHexadecimalGrouping(int digits);
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void setFixedPrecision(int precision);
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void setPrecision(int precision);
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void setText(const QString &string);
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QString groupDigits(const QString &displayString, int numDigits);
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QString text() const;
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void updateDisplay();
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void setStatusText(int i, const QString &text);
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virtual QSize sizeHint() const;
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void changeSettings();
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void enterDigit(int data);
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void updateFromCore(const CalcEngine &core,
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bool store_result_in_history = false);
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public slots:
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void slotCut();
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void slotCopy();
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void slotPaste(bool bClipboard = true);
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signals:
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void clicked();
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void changedText(const QString &);
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void changedAmount(const KNumber &);
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protected:
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void mousePressEvent(QMouseEvent *);
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virtual void paintEvent(QPaintEvent *p);
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private:
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bool changeSign();
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void invertColors();
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void initStyleOption(QStyleOptionFrame *option) const;
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private slots:
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void slotSelectionTimedOut();
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void slotDisplaySelected();
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void slotHistoryBack();
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void slotHistoryForward();
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private:
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QString text_;
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bool beep_;
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bool groupdigits_;
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bool twoscomplement_;
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int binaryGrouping_;
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int octalGrouping_;
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int hexadecimalGrouping_;
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int button_;
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bool lit_;
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NumBase num_base_;
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int precision_;
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int fixed_precision_; // "-1" = no fixed_precision
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KNumber display_amount_;
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QVector<KNumber> history_list_;
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int history_index_;
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// only used for input of new numbers
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bool eestate_;
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bool period_;
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bool neg_sign_;
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QString str_int_;
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QString str_int_exp_;
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QString str_status_[NUM_STATUS_TEXT];
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QTimer* selection_timer_;
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};
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#endif
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