portapack-mayhem/firmware/application/ui_rssi.cpp
Jared Boone 3f94591083 Remove a lot of static_cast<>s involving UI structs.
Also starting to get religion on using unsigned integers only when I want their wrapping/modulus behavior.
2016-11-29 10:13:56 -08:00

86 lines
2.5 KiB
C++

/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "ui_rssi.hpp"
#include "utility.hpp"
#include <algorithm>
namespace ui {
void RSSI::paint(Painter& painter) {
const auto r = screen_rect();
constexpr int rssi_sample_range = 256;
constexpr float rssi_voltage_min = 0.4;
constexpr float rssi_voltage_max = 2.2;
constexpr float adc_voltage_max = 3.3;
constexpr int raw_min = rssi_sample_range * rssi_voltage_min / adc_voltage_max;
constexpr int raw_max = rssi_sample_range * rssi_voltage_max / adc_voltage_max;
constexpr int raw_delta = raw_max - raw_min;
const range_t<int> x_avg_range { 0, r.width() - 1 };
const auto x_avg = x_avg_range.clip((avg_ - raw_min) * r.width() / raw_delta);
const range_t<int> x_min_range { 0, x_avg };
const auto x_min = x_min_range.clip((min_ - raw_min) * r.width() / raw_delta);
const range_t<int> x_max_range { x_avg + 1, r.width() };
const auto x_max = x_max_range.clip((max_ - raw_min) * r.width() / raw_delta);
const Rect r0 { r.left(), r.top(), x_min, r.height() };
painter.fill_rectangle(
r0,
Color::blue()
);
const Rect r1 { r.left() + x_min, r.top(), x_avg - x_min, r.height() };
painter.fill_rectangle(
r1,
Color::red()
);
const Rect r2 { r.left() + x_avg, r.top(), 1, r.height() };
painter.fill_rectangle(
r2,
Color::white()
);
const Rect r3 { r.left() + x_avg + 1, r.top(), x_max - (x_avg + 1), r.height() };
painter.fill_rectangle(
r3,
Color::red()
);
const Rect r4 { r.left() + x_max, r.top(), r.width() - x_max, r.height() };
painter.fill_rectangle(
r4,
Color::black()
);
}
void RSSI::on_statistics_update(const RSSIStatistics& statistics) {
min_ = statistics.min;
avg_ = statistics.accumulator / statistics.count;
max_ = statistics.max;
set_dirty();
}
} /* namespace ui */