finalcut/examples/calculator.cpp

1193 lines
29 KiB
C++

/***********************************************************************
* calculator.cpp - A simple calculator with trigonometric functions *
* *
* This file is part of the Final Cut widget toolkit *
* *
* Copyright 2016-2019 Markus Gans *
* *
* The Final Cut is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of *
* the License, or (at your option) any later version. *
* *
* The Final Cut 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
#include <cfloat>
#include <cmath>
#include <cstdlib>
#include <limits>
#include <map>
#include <memory>
#include <stack>
#include <final/final.h>
namespace fc = finalcut::fc;
using finalcut::FPoint;
using finalcut::FSize;
using finalcut::FColorPair;
constexpr lDouble PI = 3.141592653589793238L;
//----------------------------------------------------------------------
// class Button
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class Button : public finalcut::FButton
{
public:
// Constructor
explicit Button (FWidget* = nullptr);
// Method
void setChecked(bool);
// Event handler
virtual void onKeyPress (finalcut::FKeyEvent*) override;
private:
// Data Member
bool checked{false};
};
#pragma pack(pop)
//----------------------------------------------------------------------
Button::Button (finalcut::FWidget* parent)
: finalcut::FButton(parent)
{ }
//----------------------------------------------------------------------
void Button::setChecked (bool enable)
{
if ( checked == enable )
return;
checked = enable;
if ( checked )
{
setBackgroundColor(fc::Cyan);
setFocusForegroundColor(fc::White);
setFocusBackgroundColor(fc::Cyan);
}
else
{
setBackgroundColor(wc.button_active_bg);
setFocusForegroundColor(wc.button_active_focus_fg);
setFocusBackgroundColor(wc.button_active_focus_bg);
}
redraw();
}
//----------------------------------------------------------------------
void Button::onKeyPress (finalcut::FKeyEvent* ev)
{
FKey key = ev->key();
// catch the enter key
if ( key == fc::Fkey_return || key == fc::Fkey_enter )
return;
finalcut::FButton::onKeyPress(ev);
}
//----------------------------------------------------------------------
// class Calc
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class Calc : public finalcut::FDialog
{
public:
// Constructor
explicit Calc (finalcut::FWidget* parent = nullptr);
// Destructor
~Calc();
// Event handlers
virtual void onKeyPress (finalcut::FKeyEvent*) override;
virtual void onClose (finalcut::FCloseEvent*) override;
// Callback method
void cb_buttonClicked (finalcut::FWidget*, FDataPtr);
private:
// Typedef and Enumeration
typedef void (Calc::*keyFunction)(lDouble&); // Method pointer
enum button
{
Sine,
Cosine,
Tangent,
Reciprocal,
On,
Natural_logarithm,
Powers_of_e,
Power,
Square_root,
Divide,
Common_logarithm,
Powers_of_ten,
Parenthese_l,
Parenthese_r,
Multiply,
Hyperbolic,
Seven,
Eight,
Nine,
Subtract,
Arcus,
Four,
Five,
Six,
Add,
Pi,
One,
Two,
Three,
Percent,
Zero,
Decimal_point,
Change_sign,
Equals,
NUM_OF_BUTTONS
};
// Methods
void drawDispay();
virtual void draw() override;
void clear (lDouble&);
void zero (lDouble&);
void one (lDouble&);
void two (lDouble&);
void three (lDouble&);
void four (lDouble&);
void five (lDouble&);
void six (lDouble&);
void seven (lDouble&);
void eight (lDouble&);
void nine (lDouble&);
void add (lDouble&);
void subtract (lDouble&);
void multiply (lDouble&);
void divide (lDouble&);
void equals (lDouble&);
void change_sign (lDouble&);
void radix_point(lDouble&);
void reciprocal (lDouble&);
void percent (lDouble&);
void pi (lDouble&);
void open_bracket (lDouble&);
void close_bracket (lDouble&);
void log_e (lDouble&);
void power_e (lDouble&);
void log_10 (lDouble&);
void power_10 (lDouble&);
void power (lDouble&);
void square_root (lDouble&);
void hyperbolic (lDouble&);
void arcus (lDouble&);
void sine (lDouble&);
void cosine (lDouble&);
void tangent (lDouble&);
bool isDataEntryKey (int);
bool isOperatorKey (int);
lDouble& getValue();
void setDisplay (lDouble);
void setInfixOperator (char);
void clearInfixOperator();
void calcInfixOperator();
virtual void adjustSize() override;
const wchar_t* getButtonText (std::size_t);
void mapKeyFunctions();
// Data Members
bool error{false};
bool arcus_mode{false};
bool hyperbolic_mode{false};
lDouble a{0.0L};
lDouble b{0.0L};
lDouble infinity{std::numeric_limits<lDouble>::infinity()};
uInt max_char{33};
int last_key{-1};
char infix_operator{'\0'};
char last_infix_operator{'\0'};
finalcut::FString input{""};
std::size_t button_no[Calc::NUM_OF_BUTTONS]{};
struct stack_data
{
lDouble term;
char infix_operator;
};
std::stack<stack_data> bracket_stack{};
std::map<Calc::button, std::shared_ptr<Button> > calculator_buttons{};
std::map<Calc::button, keyFunction> key_map{};
};
#pragma pack(pop)
//----------------------------------------------------------------------
Calc::Calc (FWidget* parent)
: finalcut::FDialog(parent)
{
mapKeyFunctions();
clearInfixOperator();
std::setlocale(LC_NUMERIC, "C");
setText ("Calculator");
setGeometry (FPoint(19, 6), FSize(37, 18));
for (std::size_t key = 0; key < Calc::NUM_OF_BUTTONS; key++)
{
auto btn = std::make_shared<Button>(this);
button_no[key] = key;
if ( key == Equals )
btn->setGeometry(FPoint(30, 15), FSize(5, 3));
else
{
int x, y;
std::size_t n;
( key <= Three ) ? n = 0 : n = 1;
x = int(key + n) % 5 * 7 + 2;
y = int(key + n) / 5 * 2 + 3;
btn->setGeometry(FPoint(x, y), FSize(5, 1));
}
btn->setFlat();
btn->setNoUnderline();
btn->setText(getButtonText(key));
btn->setDoubleFlatLine(fc::top);
btn->setDoubleFlatLine(fc::bottom);
if ( isNewFont() )
btn->unsetClickAnimation();
btn->addCallback
(
"clicked",
F_METHOD_CALLBACK (this, &Calc::cb_buttonClicked),
&button_no[key]
);
calculator_buttons[button(key)] = btn;
}
calculator_buttons[On]->addAccelerator(fc::Fkey_dc); // Del key
calculator_buttons[On]->setFocus();
calculator_buttons[Pi]->addAccelerator('p');
calculator_buttons[Power]->addAccelerator('^');
calculator_buttons[Divide]->addAccelerator('/');
calculator_buttons[Powers_of_ten]->addAccelerator('d');
calculator_buttons[Multiply]->addAccelerator('*');
calculator_buttons[Decimal_point]->addAccelerator(',');
calculator_buttons[Change_sign]->addAccelerator('#');
calculator_buttons[Equals]->addAccelerator(fc::Fkey_return);
calculator_buttons[Equals]->addAccelerator(fc::Fkey_enter);
}
//----------------------------------------------------------------------
Calc::~Calc()
{ }
//----------------------------------------------------------------------
void Calc::drawDispay()
{
finalcut::FString display = input;
if ( display.isNull() || display.isEmpty() )
display = L'0';
if ( display.right(3) == L"-0." )
display = L'0';
if ( display.back() == L'.' && display.getLength() > 1 )
display = display.left(display.getLength() - 1);
if ( ! display.isEmpty() && display.getLength() < max_char )
display.insert(finalcut::FString(max_char - display.getLength(), L' '), 0);
if ( display.getLength() > max_char )
display = display.left(max_char);
if ( infix_operator )
display[1] = infix_operator;
if ( error )
display = " Error ";
if ( isMonochron() )
setReverse(false);
print() << FColorPair(fc::Black, fc::LightGray)
<< FPoint(3, 3) << display << ' '
<< FColorPair(wc.dialog_fg, wc.dialog_bg);
if ( isMonochron() )
setReverse(true);
if ( isNewFont() )
{
wchar_t bottom_line = fc::NF_border_line_bottom;
wchar_t top_bottom_line = fc::NF_border_line_up_and_down;
wchar_t top_line = fc::NF_border_line_upper;
wchar_t right_line = fc::NF_rev_border_line_right;
wchar_t left_line = fc::NF_border_line_left;
print() << FPoint(3, 2) << finalcut::FString(33, bottom_line);
print() << FPoint(2, 3) << right_line;
print() << FPoint(36, 3) << left_line;
print() << FPoint(3, 4);
finalcut::FString top_bottom_line_5 (5, top_bottom_line);
finalcut::FString top_line_2 (2, top_line);
print ( top_bottom_line_5 + top_line_2
+ top_bottom_line_5 + top_line_2
+ top_bottom_line_5 + top_line_2
+ top_bottom_line_5 + top_line_2
+ top_bottom_line_5 );
}
else
{
wchar_t vertical_and_right = fc::BoxDrawingsVerticalAndRight;
wchar_t horizontal = fc::BoxDrawingsHorizontal;
wchar_t vertical_and_left = fc::BoxDrawingsVerticalAndLeft;
finalcut::FString separator = finalcut::FString(vertical_and_right)
+ finalcut::FString(35, horizontal)
+ finalcut::FString(vertical_and_left);
print() << FPoint(1, 4) << separator;
}
}
//----------------------------------------------------------------------
void Calc::clear (lDouble&)
{
error = false;
arcus_mode = false;
hyperbolic_mode = false;
calculator_buttons[Arcus]->setChecked(false);
calculator_buttons[Hyperbolic]->setChecked(false);
input = "";
clearInfixOperator();
last_infix_operator = '\0';
a = b = 0.0L;
}
//----------------------------------------------------------------------
void Calc::zero (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '0';
else
input = '0';
}
//----------------------------------------------------------------------
void Calc::one (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '1';
else
input = '1';
}
//----------------------------------------------------------------------
void Calc::two (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '2';
else
input = '2';
}
//----------------------------------------------------------------------
void Calc::three (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '3';
else
input = '3';
}
//----------------------------------------------------------------------
void Calc::four (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '4';
else
input = '4';
}
//----------------------------------------------------------------------
void Calc::five (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '5';
else
input = '5';
}
//----------------------------------------------------------------------
void Calc::six (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '6';
else
input = '6';
}
//----------------------------------------------------------------------
void Calc::seven (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '7';
else
input = '7';
}
//----------------------------------------------------------------------
void Calc::eight (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '8';
else
input = '8';
}
//----------------------------------------------------------------------
void Calc::nine (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key) )
input += '9';
else
input = '9';
}
//----------------------------------------------------------------------
void Calc::add (lDouble&)
{
if ( ! isOperatorKey(last_key) )
calcInfixOperator();
setDisplay(a);
setInfixOperator('+');
}
//----------------------------------------------------------------------
void Calc::subtract (lDouble&)
{
if ( ! isOperatorKey(last_key) )
calcInfixOperator();
setDisplay(a);
setInfixOperator('-');
}
//----------------------------------------------------------------------
void Calc::multiply (lDouble&)
{
if ( ! isOperatorKey(last_key) )
calcInfixOperator();
setDisplay(a);
setInfixOperator('*');
}
//----------------------------------------------------------------------
void Calc::divide (lDouble&)
{
if ( ! isOperatorKey(last_key) )
calcInfixOperator();
setDisplay(a);
setInfixOperator('/');
}
//----------------------------------------------------------------------
void Calc::equals (lDouble&)
{
infix_operator = last_infix_operator;
calcInfixOperator();
setDisplay(a);
}
//----------------------------------------------------------------------
void Calc::change_sign (lDouble& x)
{
x *= -1.0L;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::radix_point (lDouble&)
{
if ( input.getLength() >= max_char )
return;
if ( isDataEntryKey(last_key)
&& ! input.isNull()
&& ! input.isEmpty()
&& ! input.includes('.') )
input += '.';
else
input = "0.";
}
//----------------------------------------------------------------------
void Calc::reciprocal (lDouble& x)
{
if ( std::fabs(x) < LDBL_EPSILON ) // x == 0
error = true;
else
{
x = 1 / x;
setDisplay(x);
}
}
//----------------------------------------------------------------------
void Calc::percent (lDouble& x)
{
infix_operator = last_infix_operator;
x /= 100.0L;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::pi (lDouble& x)
{
x = PI;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::open_bracket (lDouble&)
{
stack_data d = { a, infix_operator };
bracket_stack.push(d);
clearInfixOperator();
input = "";
a = b = 0.0L;
setDisplay(a);
}
//----------------------------------------------------------------------
void Calc::close_bracket (lDouble&)
{
if ( bracket_stack.empty() )
return;
calcInfixOperator();
setDisplay(a);
stack_data d = bracket_stack.top();
bracket_stack.pop();
b = d.term;
infix_operator = d.infix_operator;
last_infix_operator = infix_operator;
}
//----------------------------------------------------------------------
void Calc::log_e (lDouble& x)
{
x = std::log(x);
if ( errno == EDOM || errno == ERANGE )
error = true;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::power_e (lDouble& x)
{
x = std::exp(x);
if ( errno == ERANGE )
error = true;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::log_10 (lDouble& x)
{
x = std::log10(x);
if ( errno == EDOM || errno == ERANGE )
error = true;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::power_10 (lDouble& x)
{
x = std::pow(10, x);
if ( errno == EDOM || errno == ERANGE )
error = true;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::power (lDouble& x)
{
if ( ! isOperatorKey(last_key) )
calcInfixOperator();
setDisplay(x);
setInfixOperator('^');
}
//----------------------------------------------------------------------
void Calc::square_root (lDouble& x)
{
x = std::sqrt(x);
if ( errno == EDOM || errno == ERANGE )
error = true;
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::hyperbolic (lDouble& x)
{
hyperbolic_mode = ! hyperbolic_mode;
calculator_buttons[Hyperbolic]->setChecked(hyperbolic_mode);
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::arcus (lDouble& x)
{
arcus_mode = ! arcus_mode;
calculator_buttons[Arcus]->setChecked(arcus_mode);
setDisplay(x);
}
//----------------------------------------------------------------------
void Calc::sine (lDouble& x)
{
if ( hyperbolic_mode )
{
if ( arcus_mode )
{
x = std::log(x + std::sqrt(x * x + 1));
if ( errno == EDOM || errno == ERANGE )
error = true;
if ( std::fabs(x - infinity) < LDBL_EPSILON ) // x = ∞
error = true;
}
else
x = std::sinh(x);
}
else
{
if ( arcus_mode )
x = std::asin(x) * 180.0L / PI;
else if ( std::fabs(std::fmod(x, 180.0L)) < LDBL_EPSILON ) // x / 180 = 0
x = 0.0L;
else
x = std::sin(x * PI / 180.0L);
}
if ( errno == EDOM )
error = true;
setDisplay(x);
arcus_mode = false;
hyperbolic_mode = false;
calculator_buttons[Arcus]->setChecked(false);
calculator_buttons[Hyperbolic]->setChecked(false);
}
//----------------------------------------------------------------------
void Calc::cosine (lDouble& x)
{
if ( hyperbolic_mode )
{
if ( arcus_mode )
{
x = std::log(x + std::sqrt(x * x - 1));
if ( errno == EDOM || errno == ERANGE )
error = true;
if ( std::fabs(x - infinity) < LDBL_EPSILON ) // x = ∞
error = true;
}
else
x = std::cosh(x);
}
else
{
if ( arcus_mode )
x = std::acos(x) * 180.0L / PI;
else if ( std::fabs(std::fmod(x - 90.0L, 180.0L)) < LDBL_EPSILON ) // (x - 90) / 180 == 0
x = 0.0L;
else
x = std::cos(x * PI / 180.0L);
}
if ( errno == EDOM )
error = true;
setDisplay(x);
arcus_mode = false;
hyperbolic_mode = false;
calculator_buttons[Arcus]->setChecked(false);
calculator_buttons[Hyperbolic]->setChecked(false);
}
//----------------------------------------------------------------------
void Calc::tangent (lDouble& x)
{
if ( hyperbolic_mode )
{
if ( arcus_mode )
if ( x < 1 )
{
x = 0.5L * std::log((1 + x) / (1 - x));
if ( errno == EDOM || errno == ERANGE )
error = true;
}
else
error = true;
else
x = std::tanh(x);
}
else
{
if ( arcus_mode )
x = std::atan(x) * 180.0L / PI;
else
{
// Test if (x / 180) != 0 and x / 90 == 0
if ( std::fabs(std::fmod(x, 180.0L)) > LDBL_EPSILON
&& std::fabs(std::fmod(x, 90.0L)) < LDBL_EPSILON )
error = true;
else if ( std::fabs(std::fmod(x, 180.0L)) < LDBL_EPSILON ) // x / 180 == 0
x = 0.0L;
else
x = std::tan(x * PI / 180.0L);
}
}
if ( errno == EDOM )
error = true;
setDisplay(x);
arcus_mode = false;
hyperbolic_mode = false;
calculator_buttons[Arcus]->setChecked(false);
calculator_buttons[Hyperbolic]->setChecked(false);
}
//----------------------------------------------------------------------
void Calc::draw()
{
setBold();
setColor (fc::Blue, fc::Cyan);
clearArea (vdesktop, fc::MediumShade);
unsetBold();
finalcut::FDialog::draw();
drawDispay();
}
//----------------------------------------------------------------------
bool Calc::isDataEntryKey (int key)
{
// Test if key is in {'.', '0'..'9'}
int data_entry_keys[] =
{
Decimal_point,
Zero,
One,
Two,
Three,
Four,
Five,
Six,
Seven,
Eight,
Nine
};
int* iter = std::find (data_entry_keys, data_entry_keys + 11, key);
if ( iter != data_entry_keys + 11 )
return true;
else
return false;
}
//----------------------------------------------------------------------
bool Calc::isOperatorKey(int key)
{
// Test if key is in {'*', '/', '+', '-', '^', '='}
int operators[] =
{
Multiply,
Divide,
Add,
Subtract,
Power,
Equals
};
int* iter = std::find (operators, operators + 6, key);
if ( iter != operators + 6 )
return true;
else
return false;
}
//----------------------------------------------------------------------
lDouble& Calc::getValue()
{
if ( infix_operator )
return b;
else
return a;
}
//----------------------------------------------------------------------
void Calc::setDisplay (lDouble d)
{
char buffer[33];
snprintf (buffer, sizeof(buffer), "%32.11Lg", d);
input = buffer;
}
//----------------------------------------------------------------------
inline void Calc::setInfixOperator(char c)
{
infix_operator = c;
last_infix_operator = infix_operator;
}
//----------------------------------------------------------------------
inline void Calc::clearInfixOperator()
{
infix_operator = '\0';
}
//----------------------------------------------------------------------
void Calc::calcInfixOperator()
{
switch ( infix_operator )
{
case '*':
if ( std::fabs(a) > LDBL_EPSILON ) // a != 0.0L
{
// ln(a * b) = ln(a) + ln(b)
if ( std::log(std::abs(a)) + std::log(std::abs(b)) <= std::log(LDBL_MAX) )
a *= b;
else
error = true;
}
else
b = 0.0L;
break;
case '/':
if ( std::fabs(b) > LDBL_EPSILON ) // b != 0.0L
a /= b;
else
error = true;
break;
case '+':
if ( std::fabs(a) > LDBL_EPSILON ) // a != 0.0L
{
if ( std::log(std::abs(a)) + std::log(std::abs(1 + b / a)) <= std::log(LDBL_MAX) )
a += b;
else
error = true;
}
else
a = b;
break;
case '-':
if ( std::fabs(b) > LDBL_EPSILON ) // b != 0.0L
{
if ( std::log(std::abs(a)) + std::log(std::abs(1 - b / a)) <= std::log(LDBL_MAX) )
a -= b;
else
error = true;
}
else
a = b * (-1.0L);
break;
case '^':
a = std::pow(a, b);
if ( errno == EDOM || errno == ERANGE )
error = true;
break;
default:
break;
}
clearInfixOperator();
}
//----------------------------------------------------------------------
void Calc::onKeyPress (finalcut::FKeyEvent* ev)
{
std::size_t len = input.getLength();
FKey key = ev->key();
switch ( key )
{
case fc::Fkey_erase:
case fc::Fkey_backspace:
if ( len > 0 )
{
lDouble& x = getValue();
if ( len == 1 )
{
input = "";
x = 0.0L;
}
else
{
input = input.left(input.getLength() - 1);
x = lDouble(std::atof(input.c_str()));
}
drawDispay();
updateTerminal();
}
ev->accept();
break;
case fc::Fkey_escape:
case fc::Fkey_escape_mintty:
{
finalcut::FAccelEvent a_ev( fc::Accelerator_Event
, getFocusWidget() );
calculator_buttons[On]->onAccel(&a_ev);
}
ev->accept();
break;
case 'q':
close();
ev->accept();
break;
default:
finalcut::FDialog::onKeyPress(ev);
break;
}
}
//----------------------------------------------------------------------
void Calc::onClose (finalcut::FCloseEvent* ev)
{
finalcut::FApplication::closeConfirmationDialog (this, ev);
}
//----------------------------------------------------------------------
void Calc::cb_buttonClicked (finalcut::FWidget*, FDataPtr data)
{
lDouble& x = getValue();
Calc::button key = *(static_cast<Calc::button*>(data));
// Call the key function
(this->*key_map[key])(x);
if ( ! input.isEmpty() )
{
if ( isDataEntryKey(key) )
x = lDouble(input.toDouble());
else
{
// Remove trailing zeros
while ( ! input.includes(L'e')
&& input.includes(L'.')
&& input.back() == L'0' )
input = input.left(input.getLength() - 1);
}
}
drawDispay();
updateTerminal();
if ( infix_operator && ! isDataEntryKey(key) )
input = "";
last_key = key;
}
//----------------------------------------------------------------------
void Calc::adjustSize()
{
std::size_t pw = getDesktopWidth();
std::size_t ph = getDesktopHeight();
setX (1 + int(pw - getWidth()) / 2, false);
setY (1 + int(ph - getHeight()) / 2, false);
finalcut::FDialog::adjustSize();
}
//----------------------------------------------------------------------
const wchar_t* Calc::getButtonText (std::size_t key)
{
static const wchar_t* const button_text[Calc::NUM_OF_BUTTONS] =
{
L"&Sin",
L"&Cos",
L"&Tan",
L"1/&x",
L"&On",
L"L&n",
L"&e\x02e3",
L"&y\x02e3",
L"Sq&r",
L"&\xf7",
L"&Lg",
L"10&\x02e3",
L"&(",
L"&)",
L"&\xd7",
L"&Hyp",
L"&7",
L"&8",
L"&9",
L"&-",
L"&Arc",
L"&4",
L"&5",
L"&6",
L"&+",
L"&\x03c0",
L"&1",
L"&2",
L"&3",
L"&%",
L"&0",
L"&.",
L"",
L"&="
};
return button_text[key];
}
//----------------------------------------------------------------------
void Calc::mapKeyFunctions()
{
key_map[Sine] = &Calc::sine; // sin
key_map[Cosine] = &Calc::cosine; // cos
key_map[Tangent] = &Calc::tangent; // tan
key_map[Reciprocal] = &Calc::reciprocal; // 1/x
key_map[On] = &Calc::clear; // On
key_map[Natural_logarithm] = &Calc::log_e; // ln
key_map[Powers_of_e] = &Calc::power_e; // eˣ
key_map[Power] = &Calc::power; // yˣ
key_map[Square_root] = &Calc::square_root; // sqrt
key_map[Divide] = &Calc::divide; // ÷
key_map[Common_logarithm] = &Calc::log_10; // lg
key_map[Powers_of_ten] = &Calc::power_10; // 10ˣ
key_map[Parenthese_l] = &Calc::open_bracket; // (
key_map[Parenthese_r] = &Calc::close_bracket; // )
key_map[Multiply] = &Calc::multiply; // *
key_map[Hyperbolic] = &Calc::hyperbolic; // hyp
key_map[Seven] = &Calc::seven; // 7
key_map[Eight] = &Calc::eight; // 8
key_map[Nine] = &Calc::nine; // 9
key_map[Subtract] = &Calc::subtract; // -
key_map[Arcus] = &Calc::arcus; // arc
key_map[Four] = &Calc::four; // 4
key_map[Five] = &Calc::five; // 5
key_map[Six] = &Calc::six; // 6
key_map[Add] = &Calc::add; // +
key_map[Pi] = &Calc::pi; // π
key_map[One] = &Calc::one; // 1
key_map[Two] = &Calc::two; // 2
key_map[Three] = &Calc::three; // 3
key_map[Percent] = &Calc::percent; // %
key_map[Zero] = &Calc::zero; // 0
key_map[Decimal_point] = &Calc::radix_point; // .
key_map[Change_sign] = &Calc::change_sign; // ±
key_map[Equals] = &Calc::equals; // =
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Create the application object
finalcut::FApplication app(argc, argv);
// Create a calculator object
Calc calculator(&app);
// Set calculator object as main widget
app.setMainWidget(&calculator);
// Show and start the application
calculator.show();
return app.exec();
}