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Code Issues Actions 5 Packages Projects Releases Wiki Activity

Calculator: Add a Rounding menu

Browse source 
This menu has three actions. Each one of them enable a different level
of rounding: to 0, 2 or 4 digits.
This commit is contained in:
Lucas CHOLLET 2022-09-22 16:54:46 +02:00 committed by Tim Flynn
parent 164094e161
commit de568f87fd
Notes: sideshowbarker 2024-07-17 06:23:27 +09:00 
Author: https://github.com/LucasChollet
Commit: https://github.com/SerenityOS/serenity/commit/de568f87fd
Pull-request: https://github.com/SerenityOS/serenity/pull/15322
Issue: https://github.com/SerenityOS/serenity/issues/14062
Reviewed-by: https://github.com/trflynn89
5 changed files with 35 additions and 5 deletions
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6
Userland/Applications/Calculator/CalculatorWidget.cpp
View file

@ -218,3 +218,9 @@ void CalculatorWidget::keydown_event(GUI::KeyEvent& event)
update_display();
}
void CalculatorWidget::set_rounding_length(unsigned rounding_threshold)
{
m_keypad.set_rounding_length(rounding_threshold);
update_display();
}

2
Userland/Applications/Calculator/CalculatorWidget.h
View file

@ -21,6 +21,8 @@ public:
String get_entry();
void set_entry(Crypto::BigFraction);
void set_rounding_length(unsigned);
private:
CalculatorWidget();
void add_operation_button(GUI::Button&, Calculator::Operation);

9
Userland/Applications/Calculator/Keypad.cpp
View file

@ -113,10 +113,8 @@ void Keypad::set_to_0()
String Keypad::to_string() const
{
// TODO: Implement custom rounding length in the calculator.
constexpr auto maximum_precision = 6;
if (m_state == State::External)
return m_internal_value.to_string(maximum_precision);
return m_internal_value.to_string(m_displayed_fraction_length);
StringBuilder builder;
@ -136,3 +134,8 @@ String Keypad::to_string() const
return builder.to_string();
}
void Keypad::set_rounding_length(unsigned rounding_threshold)
{
m_displayed_fraction_length = rounding_threshold;
}

4
Userland/Applications/Calculator/Keypad.h
View file

@ -29,6 +29,8 @@ public:
void set_value(Crypto::BigFraction);
void set_to_0();
void set_rounding_length(unsigned);
String to_string() const;
private:
@ -46,6 +48,8 @@ private:
mutable Crypto::BigFraction m_internal_value {};
unsigned m_displayed_fraction_length { 0 };
enum class State {
External,
TypingInteger,

19
Userland/Applications/Calculator/main.cpp
View file

@ -8,6 +8,7 @@
#include <LibCore/System.h>
#include <LibCrypto/NumberTheory/ModularFunctions.h>
#include <LibGUI/Action.h>
#include <LibGUI/ActionGroup.h>
#include <LibGUI/Application.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/Icon.h>
@ -16,8 +17,6 @@
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <LibMain/Main.h>
#include <stdio.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
@ -70,6 +69,22 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
widget->set_entry(Crypto::BigFraction { Crypto::SignedBigInteger(16180339887), power });
}));
auto& round_menu = window->add_menu("&Round");
GUI::ActionGroup preview_actions;
static constexpr auto rounding_modes = Array { 0, 2, 4 };
for (auto const rounding_mode : rounding_modes) {
auto round_action = GUI::Action::create_checkable(String::formatted("To &{} digits", rounding_mode), [&widget, rounding_mode](auto&) {
widget->set_rounding_length(rounding_mode);
});
preview_actions.add_action(*round_action);
round_menu.add_action(*round_action);
}
preview_actions.set_exclusive(true);
auto& help_menu = window->add_menu("&Help");
help_menu.add_action(GUI::CommonActions::make_about_action("Calculator", app_icon, window));