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https://github.com/RGBCube/serenity
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53eb35caba
The purpose of this patch is to support addition, subtraction, multiplication and division without using conversion to double. To this end, we use the BigFraction class of LibCrypto. With this solution, we can store values without any losses and forward rounding as the last step before displaying.
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* Copyright (c) 2021, Glenford Williams <gw_dev@outlook.com>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Calculator.h"
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#include "Keypad.h"
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#include <AK/Vector.h>
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#include <LibCrypto/BigFraction/BigFraction.h>
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#include <LibGUI/Widget.h>
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class CalculatorWidget final : public GUI::Widget {
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C_OBJECT(CalculatorWidget)
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public:
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virtual ~CalculatorWidget() override = default;
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String get_entry();
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void set_entry(Crypto::BigFraction);
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private:
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CalculatorWidget();
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void add_operation_button(GUI::Button&, Calculator::Operation);
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void add_digit_button(GUI::Button&, int digit);
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void mimic_pressed_button(RefPtr<GUI::Button>);
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void perform_operation(Calculator::Operation operation);
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void update_display();
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virtual void keydown_event(GUI::KeyEvent&) override;
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Calculator m_calculator;
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Keypad m_keypad;
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RefPtr<GUI::TextBox> m_entry;
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RefPtr<GUI::Label> m_label;
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RefPtr<GUI::Button> m_digit_button[10];
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RefPtr<GUI::Button> m_mem_add_button;
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RefPtr<GUI::Button> m_mem_save_button;
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RefPtr<GUI::Button> m_mem_recall_button;
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RefPtr<GUI::Button> m_mem_clear_button;
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RefPtr<GUI::Button> m_clear_button;
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RefPtr<GUI::Button> m_clear_error_button;
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RefPtr<GUI::Button> m_backspace_button;
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RefPtr<GUI::Button> m_decimal_point_button;
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RefPtr<GUI::Button> m_sign_button;
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RefPtr<GUI::Button> m_add_button;
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RefPtr<GUI::Button> m_subtract_button;
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RefPtr<GUI::Button> m_multiply_button;
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RefPtr<GUI::Button> m_divide_button;
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RefPtr<GUI::Button> m_sqrt_button;
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RefPtr<GUI::Button> m_inverse_button;
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RefPtr<GUI::Button> m_percent_button;
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RefPtr<GUI::Button> m_equals_button;
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};
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