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137 lines
4.0 KiB
137 lines
4.0 KiB
/*
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* Copyright 2024 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#include "input_touch_wheel.hpp"
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#include <cstdint>
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#include <variant>
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#include "hal/lv_hal_indev.h"
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#include "event_queue.hpp"
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#include "haptics.hpp"
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#include "input_device.hpp"
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#include "input_hook_actions.hpp"
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#include "input_trigger.hpp"
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#include "nvs.hpp"
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#include "property.hpp"
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#include "touchwheel.hpp"
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#include "ui_events.hpp"
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namespace input {
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TouchWheel::TouchWheel(drivers::NvsStorage& nvs, drivers::TouchWheel& wheel)
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: nvs_(nvs),
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wheel_(wheel),
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sensitivity_(static_cast<int>(nvs.ScrollSensitivity()),
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[&](const lua::LuaValue& val) {
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if (!std::holds_alternative<int>(val)) {
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return false;
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}
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int int_val = std::get<int>(val);
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if (int_val < 0 || int_val > UINT8_MAX) {
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return false;
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}
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nvs.ScrollSensitivity(int_val);
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threshold_ = calculateThreshold(int_val);
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return true;
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}),
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centre_("centre", actions::select(), {}, {}, {}),
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up_("up", {}, actions::scrollToTop(), {}, {}),
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right_("right", {}),
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down_("down", {}, actions::scrollToBottom(), {}, {}),
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left_("left", {}, actions::goBack(), {}, {}),
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is_scrolling_(false),
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threshold_(calculateThreshold(nvs.ScrollSensitivity())),
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is_first_read_(true),
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last_angle_(0) {}
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auto TouchWheel::read(lv_indev_data_t* data) -> void {
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wheel_.Update();
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auto wheel_data = wheel_.GetTouchWheelData();
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int8_t ticks = calculateTicks(wheel_data);
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if (!wheel_data.is_wheel_touched) {
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// User has released the wheel.
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is_scrolling_ = false;
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data->enc_diff = 0;
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} else if (ticks != 0) {
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// User is touching the wheel, and has just passed the sensitivity
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// threshold for a scroll tick.
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is_scrolling_ = true;
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data->enc_diff = ticks;
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} else {
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// User is touching the wheel, but hasn't moved.
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data->enc_diff = 0;
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}
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centre_.update(wheel_data.is_button_touched && !wheel_data.is_wheel_touched,
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data);
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// If the user is touching the wheel but not scrolling, then they may be
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// clicking on one of the wheel's cardinal directions.
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bool pressing = wheel_data.is_wheel_touched && !is_scrolling_;
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up_.update(pressing && drivers::TouchWheel::isAngleWithin(
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wheel_data.wheel_position, 0, 32),
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data);
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right_.update(pressing && drivers::TouchWheel::isAngleWithin(
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wheel_data.wheel_position, 192, 32),
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data);
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down_.update(pressing && drivers::TouchWheel::isAngleWithin(
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wheel_data.wheel_position, 128, 32),
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data);
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left_.update(pressing && drivers::TouchWheel::isAngleWithin(
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wheel_data.wheel_position, 64, 32),
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data);
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}
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auto TouchWheel::name() -> std::string {
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return "wheel";
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}
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auto TouchWheel::triggers()
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-> std::vector<std::reference_wrapper<TriggerHooks>> {
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return {centre_, up_, right_, down_, left_};
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}
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auto TouchWheel::sensitivity() -> lua::Property& {
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return sensitivity_;
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}
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auto TouchWheel::calculateTicks(const drivers::TouchWheelData& data) -> int8_t {
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if (!data.is_wheel_touched) {
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is_first_read_ = true;
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return 0;
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}
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uint8_t new_angle = data.wheel_position;
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if (is_first_read_) {
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is_first_read_ = false;
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last_angle_ = new_angle;
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return 0;
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}
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int delta = 128 - last_angle_;
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uint8_t rotated_angle = new_angle + delta;
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if (rotated_angle < 128 - threshold_) {
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last_angle_ = new_angle;
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return 1;
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} else if (rotated_angle > 128 + threshold_) {
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last_angle_ = new_angle;
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return -1;
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} else {
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return 0;
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}
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}
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auto TouchWheel::calculateThreshold(uint8_t sensitivity) -> uint8_t {
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int tmax = 35;
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int tmin = 5;
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return (((255. - sensitivity) / 255.) * (tmax - tmin) + tmin);
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}
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} // namespace input
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