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154 lines
3.6 KiB
154 lines
3.6 KiB
/*
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KCalc
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Copyright (C) Bernd Johannes Wuebben
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wuebben@math.cornell.edu
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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
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as published by the Free Software Foundation; either version 2
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of 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, 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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#ifndef _D_KCALCDISPLAY_H_
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#define _D_KCALCDISPLAY_H_
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#include <stdlib.h>
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#include <tqlabel.h>
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#include <tqtimer.h>
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#include "knumber.h"
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#include "kcalctype.h"
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#if defined HAVE_LONG_DOUBLE && defined HAVE_L_FUNCS
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#define PRINT_FLOAT "%.*Lf"
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#define PRINT_LONG_BIG "%.*Lg"
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#define PRINT_LONG "%Lg"
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#else
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#define PRINT_FLOAT "%.*f"
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#define PRINT_LONG_BIG "%.*g"
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#define PRINT_LONG "%g"
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#endif
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#ifdef HAVE_LONG_LONG
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#define PRINT_OCTAL "%llo"
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#define PRINT_HEX "%llX"
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#else
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#define PRINT_OCTAL "%lo"
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#define PRINT_HEX "%lX"
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#endif
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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 TQLabel
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{
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TQ_OBJECT
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public:
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KCalcDisplay(TQWidget *parent=0, const char *name=0);
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~KCalcDisplay();
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protected:
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void mousePressEvent ( TQMouseEvent *);
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virtual void drawContents(TQPainter *p);
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public:
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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 const event);
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void deleteLastDigit(void);
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KNumber const & getAmount(void) const;
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void newCharacter(char const new_char);
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bool setAmount(KNumber const & 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 setFixedPrecision(int precision);
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void setPrecision(int precision);
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void setText(TQString const &string);
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TQString text() const;
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bool updateDisplay(void);
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void setStatusText(uint i, const TQString& text);
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virtual TQSize sizeHint() const;
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private:
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bool _beep;
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bool _groupdigits;
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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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private:
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bool changeSign(void);
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void invertColors(void);
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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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TQString _str_int;
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TQString _str_int_exp;
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TQString _str_status[NUM_STATUS_TEXT];
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TQTimer* selection_timer;
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signals:
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void clicked(void);
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void changedText(TQString const &);
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public slots:
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void slotCut(void);
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void slotCopy(void);
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void slotPaste(bool bClipboard=true);
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private slots:
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void slotSelectionTimedOut(void);
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void slotDisplaySelected(void);
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};
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#endif // _KCALCDISPLAY_H_
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