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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.
79 lines
3 KiB
C++
79 lines
3 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "CalculatorWidget.h"
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#include <LibCore/System.h>
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#include <LibCrypto/NumberTheory/ModularFunctions.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/Application.h>
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#include <LibGUI/Clipboard.h>
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#include <LibGUI/Icon.h>
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#include <LibGUI/Menu.h>
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#include <LibGUI/Menubar.h>
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#include <LibGUI/Window.h>
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#include <LibGfx/Bitmap.h>
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#include <LibMain/Main.h>
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#include <stdio.h>
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#include <unistd.h>
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio recvfd sendfd rpath unix"));
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auto app = TRY(GUI::Application::try_create(arguments));
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TRY(Core::System::pledge("stdio recvfd sendfd rpath"));
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TRY(Core::System::unveil("/res", "r"));
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TRY(Core::System::unveil(nullptr, nullptr));
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auto app_icon = GUI::Icon::default_icon("app-calculator"sv);
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auto window = TRY(GUI::Window::try_create());
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window->set_title("Calculator");
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window->set_resizable(false);
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window->resize(250, 215);
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auto widget = TRY(window->try_set_main_widget<CalculatorWidget>());
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window->set_icon(app_icon.bitmap_for_size(16));
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auto& file_menu = window->add_menu("&File");
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file_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
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GUI::Application::the()->quit();
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}));
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auto& edit_menu = window->add_menu("&Edit");
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edit_menu.add_action(GUI::CommonActions::make_copy_action([&](auto&) {
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GUI::Clipboard::the().set_plain_text(widget->get_entry());
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}));
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edit_menu.add_action(GUI::CommonActions::make_paste_action([&](auto&) {
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auto clipboard = GUI::Clipboard::the().fetch_data_and_type();
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if (clipboard.mime_type == "text/plain") {
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if (!clipboard.data.is_empty()) {
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widget->set_entry(Crypto::BigFraction(StringView(clipboard.data)));
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}
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}
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}));
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auto& constants_menu = window->add_menu("&Constants");
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auto const power = Crypto::NumberTheory::Power("10"_bigint, "10"_bigint);
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constants_menu.add_action(GUI::Action::create("&Pi", TRY(Gfx::Bitmap::try_load_from_file("/res/icons/calculator/pi.png"sv)), [&](auto&) {
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widget->set_entry(Crypto::BigFraction { Crypto::SignedBigInteger(31415926535), power });
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}));
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constants_menu.add_action(GUI::Action::create("&Euler's Number", TRY(Gfx::Bitmap::try_load_from_file("/res/icons/calculator/eulers_number.png"sv)), [&](auto&) {
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widget->set_entry(Crypto::BigFraction { Crypto::SignedBigInteger(27182818284), power });
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}));
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constants_menu.add_action(GUI::Action::create("&Phi", TRY(Gfx::Bitmap::try_load_from_file("/res/icons/calculator/phi.png"sv)), [&](auto&) {
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widget->set_entry(Crypto::BigFraction { Crypto::SignedBigInteger(16180339887), power });
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}));
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auto& help_menu = window->add_menu("&Help");
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help_menu.add_action(GUI::CommonActions::make_about_action("Calculator", app_icon, window));
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window->show();
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return app->exec();
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}
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