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Diffstat (limited to 'kcalc/kcalcdisplay.h')
| -rw-r--r-- | kcalc/kcalcdisplay.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/kcalc/kcalcdisplay.h b/kcalc/kcalcdisplay.h new file mode 100644 index 0000000..4f72fb7 --- /dev/null +++ b/kcalc/kcalcdisplay.h @@ -0,0 +1,152 @@ +/* + + KCalc + + Copyright (C) Bernd Johannes Wuebben + wuebben@math.cornell.edu + wuebben@kde.org + + 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. + + */ + + +#ifndef _D_KCALCDISPLAY_H_ +#define _D_KCALCDISPLAY_H_ + +#include <stdlib.h> +#include <qlabel.h> +#include <qtimer.h> +#include "knumber.h" +#include "kcalctype.h" + +#if defined HAVE_LONG_DOUBLE && defined HAVE_L_FUNCS + #define PRINT_FLOAT "%.*Lf" + #define PRINT_LONG_BIG "%.*Lg" + #define PRINT_LONG "%Lg" +#else + #define PRINT_FLOAT "%.*f" + #define PRINT_LONG_BIG "%.*g" + #define PRINT_LONG "%g" +#endif + +#ifdef HAVE_LONG_LONG + #define PRINT_OCTAL "%llo" + #define PRINT_HEX "%llX" +#else + #define PRINT_OCTAL "%lo" + #define PRINT_HEX "%lX" +#endif + +#define NUM_STATUS_TEXT 4 + +/* + This class provides a pocket calculator display. The display has + implicitely two major modes: One is for editing and one is purely + for displaying. + + When one uses "setAmount", the given amount is displayed, and the + amount which was possibly typed in before is lost. At the same time + this new value can not be modified. + + On the other hand, "addNewChar" adds a new digit to the amount that + is being typed in. If "setAmount" was used before, the display is + cleared and a new input starts. + + TODO: Check overflows, number of digits and such... +*/ + +enum NumBase { + NB_BINARY = 2, + NB_OCTAL = 8, + NB_DECIMAL = 10, + NB_HEX = 16 +}; + + +class KCalcDisplay : public QLabel +{ +Q_OBJECT + +public: + KCalcDisplay(QWidget *parent=0, const char *name=0); + ~KCalcDisplay(); + +protected: + void mousePressEvent ( QMouseEvent *); + virtual void drawContents(QPainter *p); + +public: + enum Event { + EventReset, // resets display + EventClear, // if no _error reset display + EventError, + EventChangeSign + }; + bool sendEvent(Event const event); + void deleteLastDigit(void); + KNumber const & getAmount(void) const; + void newCharacter(char const new_char); + bool setAmount(KNumber const & new_amount); + int setBase(NumBase new_base); + void setBeep(bool flag); + void setGroupDigits(bool flag); + void setFixedPrecision(int precision); + void setPrecision(int precision); + void setText(QString const &string); + QString text() const; + bool updateDisplay(void); + void setStatusText(uint i, const QString& text); + virtual QSize sizeHint() const; +private: + bool _beep; + bool _groupdigits; + int _button; + bool _lit; + NumBase _num_base; + + int _precision; + int _fixed_precision; // "-1" = no fixed_precision + + KNumber _display_amount; +private: + bool changeSign(void); + void invertColors(void); + + // only used for input of new numbers + bool _eestate; + bool _period; + bool _neg_sign; + QString _str_int; + QString _str_int_exp; + QString _str_status[NUM_STATUS_TEXT]; + + QTimer* selection_timer; + +signals: + void clicked(void); + void changedText(QString const &); + +public slots: + void slotCut(void); + void slotCopy(void); + void slotPaste(bool bClipboard=true); + +private slots: + void slotSelectionTimedOut(void); + void slotDisplaySelected(void); +}; + +#endif // _KCALCDISPLAY_H_ |