Initial firmware commit.

firmware/application/ui_channel.cpp

@@ -0,0 +1,79 @@
+/*
+ * 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_channel.hpp"
+
+#include <algorithm>
+
+namespace ui {
+
+void Channel::on_show() {
+	context().message_map[Message::ID::ChannelStatistics] = [this](const Message* const p) {
+		this->on_statistics_update(static_cast<const ChannelStatisticsMessage*>(p)->statistics);
+	};
+}
+
+void Channel::on_hide() {
+	context().message_map[Message::ID::ChannelStatistics] = nullptr;
+}
+
+void Channel::paint(Painter& painter) {
+	const auto r = screen_rect();
+
+	const int32_t db_min = -r.width();
+	const int32_t x_0 = 0;
+	const int32_t x_max = std::max(x_0, max_db_ - db_min);
+	const int32_t x_lim = r.width();
+
+	const Rect r0 {
+		static_cast<ui::Coord>(r.left() + x_0), r.top(),
+		static_cast<ui::Dim>(x_max - x_0), r.height()
+	};
+	painter.fill_rectangle(
+		r0,
+		Color::blue()
+	);
+
+	const Rect r1 {
+		static_cast<ui::Coord>(r.left() + x_max), r.top(),
+		1, r.height()
+	};
+	painter.fill_rectangle(
+		r1,
+		Color::white()
+	);
+
+	const Rect r2 {
+		static_cast<ui::Coord>(r.left() + x_max + 1), r.top(),
+		static_cast<ui::Dim>(x_lim - (x_max + 1)), r.height()
+	};
+	painter.fill_rectangle(
+		r2,
+		Color::black()
+	);
+}
+
+void Channel::on_statistics_update(const ChannelStatistics& statistics) {
+	max_db_ = statistics.max_db;
+	set_dirty();
+}
+
+} /* namespace ui */