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https://github.com/RGBCube/serenity
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da349607a3
Scroll the mouse wheel over a NumericInput to quickly change the value. This matches the SpinBox behavior.
102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@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 "NumericInput.h"
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#include <ctype.h>
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namespace GUI {
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NumericInput::NumericInput()
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{
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set_text("0"sv);
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on_change = [&] {
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auto number_opt = text().to_number<int>();
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if (number_opt.has_value()) {
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set_current_number(number_opt.value(), GUI::AllowCallback::No);
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return;
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}
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StringBuilder builder;
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bool first = true;
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for (auto& ch : text()) {
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if (isdigit(ch) || (first && ((ch == '-' && m_min_number < 0) || ch == '+')))
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builder.append(ch);
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first = false;
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}
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auto new_number_opt = builder.to_byte_string().to_number<int>();
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if (!new_number_opt.has_value()) {
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m_needs_text_reset = true;
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return;
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} else {
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m_needs_text_reset = false;
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}
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set_text(builder.to_byte_string());
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set_current_number(new_number_opt.value(), GUI::AllowCallback::No);
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};
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on_up_pressed = [&] {
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if (m_current_number < m_max_number)
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set_current_number(m_current_number + 1);
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};
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on_down_pressed = [&] {
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if (m_current_number > m_min_number)
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set_current_number(m_current_number - 1);
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};
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on_focusout = [&] { on_focus_lost(); };
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on_return_pressed = [&] { on_focus_lost(); };
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on_escape_pressed = [&] { on_focus_lost(); };
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}
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void NumericInput::set_min_number(i64 number)
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{
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m_min_number = number;
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if (m_current_number < number)
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set_current_number(number);
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}
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void NumericInput::set_max_number(i64 number)
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{
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m_max_number = number;
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if (m_current_number > number)
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set_current_number(number);
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}
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void NumericInput::on_focus_lost()
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{
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if (m_needs_text_reset) {
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set_text(ByteString::number(m_current_number));
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m_needs_text_reset = false;
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}
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if (on_number_changed)
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on_number_changed(m_current_number);
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}
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void NumericInput::set_current_number(i64 number, GUI::AllowCallback allow_callback)
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{
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if (number == m_current_number)
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return;
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m_current_number = clamp(number, m_min_number, m_max_number);
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set_text(ByteString::number(m_current_number));
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if (on_number_changed && allow_callback == GUI::AllowCallback::Yes)
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on_number_changed(m_current_number);
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}
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void NumericInput::mousewheel_event(GUI::MouseEvent& event)
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{
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auto wheel_delta = event.wheel_delta_y() / abs(event.wheel_delta_y());
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if (event.modifiers() == KeyModifier::Mod_Ctrl)
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wheel_delta *= 6;
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set_current_number(m_current_number - wheel_delta);
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event.accept();
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}
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}
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