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Applications: Move to Userland/Applications/

This commit is contained in:
Andreas Kling 2021-01-12 12:05:23 +01:00
parent aa939c4b4b
commit dc28c07fa5
287 changed files with 1 additions and 1 deletions

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compile_gml(CalculatorWindow.gml CalculatorGML.h calculator_gml)
set(SOURCES
main.cpp
Calculator.cpp
CalculatorWidget.cpp
Keypad.cpp
CalculatorGML.h
)
serenity_app(Calculator ICON app-calculator)
target_link_libraries(Calculator LibGUI)

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Calculator.h"
#include <AK/Assertions.h>
#include <math.h>
Calculator::Calculator()
{
}
Calculator::~Calculator()
{
}
double Calculator::begin_operation(Operation operation, double argument)
{
double res = 0.0;
switch (operation) {
case Operation::None:
ASSERT_NOT_REACHED();
case Operation::Add:
case Operation::Subtract:
case Operation::Multiply:
case Operation::Divide:
m_saved_argument = argument;
m_operation_in_progress = operation;
return argument;
case Operation::Sqrt:
if (argument < 0.0) {
m_has_error = true;
return argument;
}
res = sqrt(argument);
clear_operation();
break;
case Operation::Inverse:
if (argument == 0.0) {
m_has_error = true;
return argument;
}
res = 1 / argument;
clear_operation();
break;
case Operation::Percent:
res = argument * 0.01;
break;
case Operation::ToggleSign:
res = -argument;
break;
case Operation::MemClear:
m_mem = 0.0;
res = argument;
break;
case Operation::MemRecall:
res = m_mem;
break;
case Operation::MemSave:
m_mem = argument;
res = argument;
break;
case Operation::MemAdd:
m_mem += argument;
res = m_mem;
break;
}
return res;
}
double Calculator::finish_operation(double argument)
{
double res = 0.0;
switch (m_operation_in_progress) {
case Operation::None:
return argument;
case Operation::Add:
res = m_saved_argument + argument;
break;
case Operation::Subtract:
res = m_saved_argument - argument;
break;
case Operation::Multiply:
res = m_saved_argument * argument;
break;
case Operation::Divide:
if (argument == 0.0) {
m_has_error = true;
return argument;
}
res = m_saved_argument / argument;
break;
case Operation::Sqrt:
case Operation::Inverse:
case Operation::Percent:
case Operation::ToggleSign:
case Operation::MemClear:
case Operation::MemRecall:
case Operation::MemSave:
case Operation::MemAdd:
ASSERT_NOT_REACHED();
}
clear_operation();
return res;
}
void Calculator::clear_operation()
{
m_operation_in_progress = Operation::None;
m_saved_argument = 0.0;
clear_error();
}

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
// This type implements the regular calculator
// behavior, such as performing arithmetic
// operations and providing a memory cell.
// It does not deal with number input; you
// have to pass in already parsed double
// values.
class Calculator final {
public:
Calculator();
~Calculator();
enum class Operation {
None,
Add,
Subtract,
Multiply,
Divide,
Sqrt,
Inverse,
Percent,
ToggleSign,
MemClear,
MemRecall,
MemSave,
MemAdd
};
double begin_operation(Operation, double);
double finish_operation(double);
bool has_error() const { return m_has_error; }
void clear_operation();
void clear_error() { m_has_error = false; }
private:
Operation m_operation_in_progress { Operation::None };
double m_saved_argument { 0.0 };
double m_mem { 0.0 };
bool m_has_error { false };
};

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2021 Glenford Williams <gw_dev@outlook.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "CalculatorWidget.h"
#include "Applications/Calculator/CalculatorGML.h"
#include <AK/Assertions.h>
#include <LibGUI/Button.h>
#include <LibGUI/Label.h>
#include <LibGUI/TextBox.h>
#include <LibGfx/Font.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
CalculatorWidget::CalculatorWidget()
{
load_from_gml(calculator_gml);
m_entry = *find_descendant_of_type_named<GUI::TextBox>("entry_textbox");
m_entry->set_relative_rect(5, 5, 244, 26);
m_entry->set_text_alignment(Gfx::TextAlignment::CenterRight);
m_entry->set_font(Gfx::FontDatabase::default_fixed_width_font());
m_label = *find_descendant_of_type_named<GUI::Label>("label");
m_label->set_frame_shadow(Gfx::FrameShadow::Sunken);
m_label->set_frame_shape(Gfx::FrameShape::Container);
m_label->set_frame_thickness(2);
for (int i = 0; i < 10; i++) {
m_digit_button[i] = *find_descendant_of_type_named<GUI::Button>(String::formatted("{}_button", i));
add_digit_button(*m_digit_button[i], i);
}
m_mem_add_button = *find_descendant_of_type_named<GUI::Button>("mem_add_button");
add_operation_button(*m_mem_add_button, Calculator::Operation::MemAdd);
m_mem_save_button = *find_descendant_of_type_named<GUI::Button>("mem_save_button");
add_operation_button(*m_mem_save_button, Calculator::Operation::MemSave);
m_mem_recall_button = *find_descendant_of_type_named<GUI::Button>("mem_recall_button");
add_operation_button(*m_mem_recall_button, Calculator::Operation::MemRecall);
m_mem_clear_button = *find_descendant_of_type_named<GUI::Button>("mem_clear_button");
add_operation_button(*m_mem_clear_button, Calculator::Operation::MemClear);
m_clear_button = *find_descendant_of_type_named<GUI::Button>("clear_button");
m_clear_button->on_click = [this](auto) {
m_keypad.set_value(0.0);
m_calculator.clear_operation();
update_display();
};
m_clear_error_button = *find_descendant_of_type_named<GUI::Button>("clear_error_button");
m_clear_error_button->on_click = [this](auto) {
m_keypad.set_value(0.0);
update_display();
};
m_backspace_button = *find_descendant_of_type_named<GUI::Button>("backspace_button");
m_backspace_button->on_click = [this](auto) {
m_keypad.type_backspace();
update_display();
};
m_decimal_point_button = *find_descendant_of_type_named<GUI::Button>("decimal_button");
m_decimal_point_button->on_click = [this](auto) {
m_keypad.type_decimal_point();
update_display();
};
m_sign_button = *find_descendant_of_type_named<GUI::Button>("sign_button");
add_operation_button(*m_sign_button, Calculator::Operation::ToggleSign);
m_add_button = *find_descendant_of_type_named<GUI::Button>("add_button");
add_operation_button(*m_add_button, Calculator::Operation::Add);
m_subtract_button = *find_descendant_of_type_named<GUI::Button>("subtract_button");
add_operation_button(*m_subtract_button, Calculator::Operation::Subtract);
m_multiply_button = *find_descendant_of_type_named<GUI::Button>("multiply_button");
add_operation_button(*m_multiply_button, Calculator::Operation::Multiply);
m_divide_button = *find_descendant_of_type_named<GUI::Button>("divide_button");
add_operation_button(*m_divide_button, Calculator::Operation::Divide);
m_sqrt_button = *find_descendant_of_type_named<GUI::Button>("sqrt_button");
add_operation_button(*m_sqrt_button, Calculator::Operation::Sqrt);
m_inverse_button = *find_descendant_of_type_named<GUI::Button>("inverse_button");
add_operation_button(*m_inverse_button, Calculator::Operation::Inverse);
m_percent_button = *find_descendant_of_type_named<GUI::Button>("mod_button");
add_operation_button(*m_percent_button, Calculator::Operation::Percent);
m_equals_button = *find_descendant_of_type_named<GUI::Button>("equal_button");
m_equals_button->on_click = [this](auto) {
double argument = m_keypad.value();
double res = m_calculator.finish_operation(argument);
m_keypad.set_value(res);
update_display();
};
}
CalculatorWidget::~CalculatorWidget()
{
}
void CalculatorWidget::add_operation_button(GUI::Button& button, Calculator::Operation operation)
{
button.on_click = [this, operation](auto) {
double argument = m_keypad.value();
double res = m_calculator.begin_operation(operation, argument);
m_keypad.set_value(res);
update_display();
};
}
void CalculatorWidget::add_digit_button(GUI::Button& button, int digit)
{
button.on_click = [this, digit](auto) {
m_keypad.type_digit(digit);
update_display();
};
}
void CalculatorWidget::update_display()
{
m_entry->set_text(m_keypad.to_string());
if (m_calculator.has_error())
m_label->set_text("E");
else
m_label->set_text("");
}
void CalculatorWidget::keydown_event(GUI::KeyEvent& event)
{
//Clear button selection when we are typing
m_equals_button->set_focus(true);
m_equals_button->set_focus(false);
if (event.key() == KeyCode::Key_Return) {
m_keypad.set_value(m_calculator.finish_operation(m_keypad.value()));
} else if (event.key() >= KeyCode::Key_0 && event.key() <= KeyCode::Key_9) {
m_keypad.type_digit(atoi(event.text().characters()));
} else if (event.key() == KeyCode::Key_Period) {
m_keypad.type_decimal_point();
} else if (event.key() == KeyCode::Key_Escape) {
m_keypad.set_value(0.0);
m_calculator.clear_operation();
} else if (event.key() == KeyCode::Key_Backspace) {
m_keypad.type_backspace();
} else {
Calculator::Operation operation;
switch (event.key()) {
case KeyCode::Key_Plus:
operation = Calculator::Operation::Add;
break;
case KeyCode::Key_Minus:
operation = Calculator::Operation::Subtract;
break;
case KeyCode::Key_Asterisk:
operation = Calculator::Operation::Multiply;
break;
case KeyCode::Key_Slash:
operation = Calculator::Operation::Divide;
break;
case KeyCode::Key_Percent:
operation = Calculator::Operation::Percent;
break;
default:
return;
}
m_keypad.set_value(m_calculator.begin_operation(operation, m_keypad.value()));
}
update_display();
}

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2021 Glenford Williams <gw_dev@outlook.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "Calculator.h"
#include "Keypad.h"
#include <AK/Vector.h>
#include <LibGUI/Widget.h>
class CalculatorWidget final : public GUI::Widget {
C_OBJECT(CalculatorWidget)
public:
virtual ~CalculatorWidget() override;
private:
CalculatorWidget();
void add_operation_button(GUI::Button&, Calculator::Operation);
void add_digit_button(GUI::Button&, int digit);
void update_display();
virtual void keydown_event(GUI::KeyEvent&) override;
Calculator m_calculator;
Keypad m_keypad;
RefPtr<GUI::TextBox> m_entry;
RefPtr<GUI::Label> m_label;
RefPtr<GUI::Button> m_digit_button[10];
RefPtr<GUI::Button> m_mem_add_button;
RefPtr<GUI::Button> m_mem_save_button;
RefPtr<GUI::Button> m_mem_recall_button;
RefPtr<GUI::Button> m_mem_clear_button;
RefPtr<GUI::Button> m_clear_button;
RefPtr<GUI::Button> m_clear_error_button;
RefPtr<GUI::Button> m_backspace_button;
RefPtr<GUI::Button> m_decimal_point_button;
RefPtr<GUI::Button> m_sign_button;
RefPtr<GUI::Button> m_add_button;
RefPtr<GUI::Button> m_subtract_button;
RefPtr<GUI::Button> m_multiply_button;
RefPtr<GUI::Button> m_divide_button;
RefPtr<GUI::Button> m_sqrt_button;
RefPtr<GUI::Button> m_inverse_button;
RefPtr<GUI::Button> m_percent_button;
RefPtr<GUI::Button> m_equals_button;
};

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@GUI::Widget {
fixed_width: 254
fixed_height: 213
fill_with_background_color: true
layout: @GUI::VerticalBoxLayout {
margins: [10, 0, 10, 0]
}
@GUI::TextBox {
name: "entry_textbox"
}
@GUI::Widget {
layout: @GUI::HorizontalBoxLayout {
}
@GUI::Label {
name: "label"
fixed_width: 35
fixed_height: 27
}
@GUI::Widget {
fixed_width: 5
}
@GUI::Button {
name: "backspace_button"
text: "Backspace"
fixed_width: 65
fixed_height: 28
foreground_color: "brown"
}
@GUI::Button {
name: "clear_error_button"
text: "CE"
fixed_width: 55
fixed_height: 28
foreground_color: "brown"
}
@GUI::Button {
name: "clear_button"
text: "C"
fixed_width: 60
fixed_height: 28
foreground_color: "brown"
}
}
@GUI::Widget {
layout: @GUI::HorizontalBoxLayout {
}
@GUI::Button {
name: "mem_clear_button"
text: "MC"
fixed_width: 35
fixed_height: 28
foreground_color: "red"
}
@GUI::Widget {
fixed_width: 5
}
@GUI::Button {
name: "7_button"
text: "7"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "8_button"
text: "8"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "9_button"
text: "9"
fixed_width: 35
fixed_height: 28
}
@GUI::Button {
name: "divide_button"
text: "/"
fixed_width: 35
fixed_height: 28
}
@GUI::Button {
name: "sqrt_button"
text: "sqrt"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
}
@GUI::Widget {
layout: @GUI::HorizontalBoxLayout {}
@GUI::Button {
name: "mem_recall_button"
text: "MR"
fixed_width: 35
fixed_height: 28
foreground_color: "red"
}
@GUI::Widget {
fixed_width: 5
}
@GUI::Button {
name: "4_button"
text: "4"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "5_button"
text: "5"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "6_button"
text: "6"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "multiply_button"
text: "*"
fixed_width: 35
fixed_height: 28
}
@GUI::Button {
name: "mod_button"
text: "%"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
}
@GUI::Widget {
layout: @GUI::HorizontalBoxLayout {}
@GUI::Button {
name: "mem_save_button"
text: "MS"
fixed_width: 35
fixed_height: 28
foreground_color: "red"
}
@GUI::Widget {
fixed_width: 5
}
@GUI::Button {
name: "1_button"
text: "1"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "2_button"
text: "2"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "3_button"
text: "3"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "subtract_button"
text: "-"
fixed_width: 35
fixed_height: 28
}
@GUI::Button {
name: "inverse_button"
text: "1/x"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
}
@GUI::Widget {
layout: @GUI::HorizontalBoxLayout {}
@GUI::Button {
name: "mem_add_button"
text: "M+"
fixed_width: 35
fixed_height: 28
foreground_color: "red"
}
@GUI::Widget {
fixed_width: 5
}
@GUI::Button {
name: "0_button"
text: "0"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "sign_button"
text: "+/-"
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "decimal_button"
text: "."
fixed_width: 35
fixed_height: 28
foreground_color: "blue"
}
@GUI::Button {
name: "add_button"
text: "+"
fixed_width: 35
fixed_height: 28
}
@GUI::Button {
name: "equal_button"
text: "="
fixed_width: 35
fixed_height: 28
foreground_color: "red"
}
}
}

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Keypad.h"
#include <AK/StringBuilder.h>
#include <math.h>
Keypad::Keypad()
{
}
Keypad::~Keypad()
{
}
void Keypad::type_digit(int digit)
{
switch (m_state) {
case State::External:
m_state = State::TypingInteger;
m_negative = false;
m_int_value = digit;
m_frac_value = 0;
m_frac_length = 0;
break;
case State::TypingInteger:
ASSERT(m_frac_value == 0);
ASSERT(m_frac_length == 0);
m_int_value *= 10;
m_int_value += digit;
break;
case State::TypingDecimal:
if (m_frac_length > 6)
break;
m_frac_value *= 10;
m_frac_value += digit;
m_frac_length++;
break;
}
}
void Keypad::type_decimal_point()
{
switch (m_state) {
case State::External:
m_negative = false;
m_int_value = 0;
m_frac_value = 0;
m_frac_length = 0;
break;
case State::TypingInteger:
ASSERT(m_frac_value == 0);
ASSERT(m_frac_length == 0);
m_state = State::TypingDecimal;
break;
case State::TypingDecimal:
// Ignore it.
break;
}
}
void Keypad::type_backspace()
{
switch (m_state) {
case State::External:
m_negative = false;
m_int_value = 0;
m_frac_value = 0;
m_frac_length = 0;
break;
case State::TypingDecimal:
if (m_frac_length > 0) {
m_frac_value /= 10;
m_frac_length--;
break;
}
ASSERT(m_frac_value == 0);
m_state = State::TypingInteger;
[[fallthrough]];
case State::TypingInteger:
ASSERT(m_frac_value == 0);
ASSERT(m_frac_length == 0);
m_int_value /= 10;
if (m_int_value == 0)
m_negative = false;
break;
}
}
double Keypad::value() const
{
double res = 0.0;
long frac = m_frac_value;
for (int i = 0; i < m_frac_length; i++) {
int digit = frac % 10;
res += digit;
res /= 10.0;
frac /= 10;
}
res += m_int_value;
if (m_negative)
res = -res;
return res;
}
void Keypad::set_value(double value)
{
m_state = State::External;
if (value < 0.0) {
m_negative = true;
value = -value;
} else
m_negative = false;
m_int_value = value;
value -= m_int_value;
m_frac_value = 0;
m_frac_length = 0;
while (value != 0) {
value *= 10.0;
int digit = value;
m_frac_value *= 10;
m_frac_value += digit;
m_frac_length++;
value -= digit;
if (m_frac_length > 6)
break;
}
}
String Keypad::to_string() const
{
StringBuilder builder;
if (m_negative)
builder.append("-");
builder.appendff("{}", m_int_value);
if (m_frac_length > 0)
builder.appendff(".{:0{}}", m_frac_value, m_frac_length);
return builder.to_string();
}

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/String.h>
// This type implements number typing and
// displaying mechanics. It does not perform
// any arithmetic operations or anything on
// the values it deals with.
class Keypad final {
public:
Keypad();
~Keypad();
void type_digit(int digit);
void type_decimal_point();
void type_backspace();
double value() const;
void set_value(double);
String to_string() const;
private:
// Internal representation of the current decimal value.
bool m_negative { false };
long m_int_value { 0 };
long m_frac_value { 0 };
int m_frac_length { 0 };
// E.g. for -35.004200,
// m_negative = true
// m_int_value = 35
// m_frac_value = 4200
// m_frac_length = 6
enum class State {
External,
TypingInteger,
TypingDecimal
};
State m_state { State::External };
};

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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "CalculatorWidget.h"
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/Icon.h>
#include <LibGUI/Menu.h>
#include <LibGUI/MenuBar.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <stdio.h>
int main(int argc, char** argv)
{
if (pledge("stdio shared_buffer rpath accept unix cpath fattr", nullptr) < 0) {
perror("pledge");
return 1;
}
auto app = GUI::Application::construct(argc, argv);
if (pledge("stdio shared_buffer rpath accept", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/res", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
auto app_icon = GUI::Icon::default_icon("app-calculator");
auto window = GUI::Window::construct();
window->set_title("Calculator");
window->set_resizable(false);
window->resize(254, 213);
window->set_main_widget<CalculatorWidget>();
window->show();
window->set_icon(app_icon.bitmap_for_size(16));
auto menubar = GUI::MenuBar::construct();
auto& app_menu = menubar->add_menu("Calculator");
app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
GUI::Application::the()->quit();
return;
}));
auto& help_menu = menubar->add_menu("Help");
help_menu.add_action(GUI::CommonActions::make_about_action("Calculator", app_icon));
app->set_menubar(move(menubar));
return app->exec();
}