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trend_window.cpp
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trend_window.cpp
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/**
* \file trend_window.cpp
* \brief Graphing / Trend support
* \copyright
* 2021 Andrew Buettner (ABi)
*
* \section LICENSE
*
* QModbusTool - A QT Based Modbus Client
*
* 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
* of the License, 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
// c++ includes
#include <QTimer> // QTimer
#include <QMessageBox> // QMessageBox
#include <QAction> // QAction
#include <QFileDialog> // QFileDialog
#include <qtcsv/stringdata.h> // QtCSV::StringData
#include <qtcsv/writer.h> // QtCSV::Writer::write
// C includes
/* -none- */
// project includes
#include "trend_window.h" // local include
#include "trend_line.h" // TrendLine
#include "configure_trend_line.h" // ConfigureTrendLine
#include "configure_trend.h" // ConfigureTrend
using TimeDiff = std::chrono::duration<double>;
using std::chrono::steady_clock;
namespace {
const auto g_num_points = 100;
}
TrendWindow::TrendWindow(QWidget *const parent) :
BaseDialog(parent, false),
m_plot{new QCustomPlot(this)},
m_data(),
m_timestamps(),
m_start_time{steady_clock::now()},
m_layout{new QHBoxLayout(this)},
m_legend{new QGroupBox(tr("Legend:"), this)},
m_legend_layout{new QVBoxLayout(m_legend)},
m_button_area{new QScrollArea(m_legend)},
m_scroll_container{new QWidget(m_button_area)},
m_scroll_layout{new QVBoxLayout(m_scroll_container)},
m_add_button{new QPushButton(tr("Add new\nregister"), m_scroll_container)},
m_configure_button{new QPushButton(tr("Graph\nMenu"), m_legend)},
m_main_menu{new QMenu(m_configure_button->text(), m_configure_button)},
m_miny{0.0},
m_maxy{1.0}
{
auto timepoint = 0.0;
for (auto i=g_num_points; i>0; --i) {
--timepoint;
m_timestamps.prepend(timepoint);
}
setLayout(m_layout);
connect(m_add_button, &QPushButton::clicked, this, &TrendWindow::on_add_button_clicked);
}
void TrendWindow::setupUi()
{
/* Configure basic window layout and top-level widgets */
m_layout->addWidget(m_legend);
m_legend->setLayout(m_legend_layout);
m_legend->setFixedWidth(160);
m_legend_layout->addSpacing(15);
m_legend_layout->addWidget(m_configure_button);
/* Menu Button and menu */
m_configure_button->setAutoDefault(false);
m_configure_button->setMenu(m_main_menu);
auto configure = m_main_menu->addAction(tr("Configure Graph"));
connect(configure, &QAction::triggered, this, &TrendWindow::on_configure_triggered);
auto save = m_main_menu->addAction(tr("Save Data"));
connect(save, &QAction::triggered, this, &TrendWindow::on_save_triggered);
auto capture = m_main_menu->addAction(tr("Save Screenshot"));
connect(capture, &QAction::triggered, this, &TrendWindow::on_capture_triggered);
/* Scrollable "Legend" containing a list of graphs */
m_legend_layout->addWidget(m_button_area);
m_button_area->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_button_area->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
m_button_area->setWidget(m_scroll_container);
m_scroll_container->setLayout(m_scroll_layout);
m_button_area->setFrameShape(QFrame::NoFrame);
m_button_area->setFrameRect(QRect(0, 0, 0, 0));
m_button_area->setWidgetResizable(true);
m_scroll_layout->setAlignment(Qt::AlignTop);
m_scroll_layout->addWidget(m_add_button);
m_add_button->setFixedWidth(125);
m_add_button->setDefault(true);
/* Build the actual plot. It must have at least 1 graph. */
m_layout->addWidget(m_plot);
m_plot->addGraph();
m_plot->xAxis->setLabel(tr("time"));
m_plot->yAxis->setLabel(tr("value"));
m_plot->setOpenGl(true);
resize(850, 340);
setWindowTitle(tr("Trend"));
}
void TrendWindow::on_new_value(const quint16 reg,
const quint16 value,
const quint8 unit_id)
{
auto graph_inst = m_data.find(get_key(reg, unit_id));
if (m_data.end() != graph_inst) {
graph_inst->second->set_data(value);
scan();
}
}
void TrendWindow::redraw_graph()
{
auto time = m_timestamps.begin();
const auto start_time = *time;
const auto graph_size = m_timestamps.size();
auto end_time = std::numeric_limits<double>::max();
QVector<double> x(graph_size);
for (auto i=0; i < graph_size; ++i) {
end_time = *time;
x[i] = end_time;
++time;
}
QVector<double> y(graph_size, 0.0);
auto graph = 0;
for (const auto &line: m_data) {
for (auto i=0; i<graph_size; ++i) {
y[i] = (*line.second)[i];
}
m_plot->graph(graph)->setData(x, y, true);
m_plot->graph(graph)->setPen(QPen(*line.second));
++graph;
}
if (0 == graph) {
m_plot->graph(0)->setData(x, y, true);
}
m_plot->xAxis->setRange(start_time, end_time);
m_plot->yAxis->setRange(m_miny, m_maxy);
m_plot->replot();
}
void TrendWindow::scan()
{
for (const auto &i: m_data) {
if (!bool(*(i.second))) {
return;
}
}
const TimeDiff diff = steady_clock::now() - m_start_time;
m_timestamps.removeFirst();
m_timestamps.append(diff.count());
for (auto &i: m_data) {
i.second->update();
}
redraw_graph();
}
quint32 TrendWindow::get_key(const quint16 reg, const quint8 node) const noexcept
{
return (quint32(node) << 16U) | quint32(reg);
}
void TrendWindow::add_trend(TrendLine *const trend)
{
m_data[quint32(*trend)] = trend;
if (size_t(m_plot->graphCount()) < m_data.size()) {
m_plot->addGraph();
}
auto w = m_scroll_layout->count();
m_scroll_layout->insertWidget(w - 1, trend);
redraw_graph();
}
void TrendWindow::on_add_button_clicked()
{
auto dlg = ConfigureTrendLine(this);
if (dlg.exec() != 0) {
auto key = quint32(dlg);
const auto trend = m_data.find(key);
if (m_data.end() != trend) {
auto error_box = QMessageBox(this);
error_box.setIcon(QMessageBox::Critical);
error_box.setStandardButtons(QMessageBox::Ok);
error_box.setText(tr("Error"));
error_box.setWindowTitle(tr("Invalid Configuration"));
error_box.setInformativeText(tr("Duplicate trend requested.\n"
"Edit trend instead"));
error_box.setDetailedText(tr("Register: %1\nRemote Node: %2")
.arg(trend->second->m_reg_number)
.arg(trend->second->m_device_id));
error_box.exec();
} else {
add_trend(dlg.create_trend());
}
}
}
void TrendWindow::remove_trend(const quint32 trend_key)
{
auto trend_index = m_data.find(trend_key);
auto trend = trend_index->second;
m_data.erase(trend_index);
m_scroll_layout->removeWidget(trend);
const auto graph_count = m_plot->graphCount();
if (graph_count > 1) {
m_plot->removeGraph(graph_count - 1);
}
redraw_graph();
// Don't let it happen until the next entry into the scheduler as the
// instance is probably in our call path.
emit trend->deleteLater();
}
void TrendWindow::on_configure_triggered()
{
auto dlg = ConfigureTrend(this, m_miny, m_maxy, m_timestamps.size());
if (dlg.exec() != 0) {
m_fixed_limits = bool(dlg);
const auto limits = dlg.get_min_max();
m_miny = limits.first;
m_maxy = limits.second;
const auto points = dlg.get_num_points();
if (points.has_value()) {
resize_history(points.value());
}
}
}
void TrendWindow::on_save_triggered()
{
auto dialog = QFileDialog(this, tr("Save data as..."));
dialog.setNameFilters({tr("Spreadsheet (*.csv)"),
tr("All files (*)")});
dialog.setAcceptMode(QFileDialog::AcceptSave);
dialog.setViewMode(QFileDialog::Detail);
dialog.setFileMode(QFileDialog::AnyFile);
dialog.setDefaultSuffix("csv");
if (dialog.exec() != 0) {
auto file_name = dialog.selectedFiles().first();
if (!save_register_set(file_name)) {
QMessageBox::warning(this, tr("Save history"),
tr("Cannot write file %1:\n.")
.arg(QDir::toNativeSeparators(file_name)));
}
}
}
void TrendWindow::on_capture_triggered()
{
auto dialog = QFileDialog(this, tr("Save image as..."));
dialog.setNameFilters({tr("PNG (*.png)"),
tr("JPG (*.jpg)"),
tr("BMP (*.bmp)")});
dialog.setAcceptMode(QFileDialog::AcceptSave);
dialog.setViewMode(QFileDialog::Detail);
dialog.setFileMode(QFileDialog::AnyFile);
dialog.setDefaultSuffix("png");
if (dialog.exec() != 0) {
auto file_name = dialog.selectedFiles().first();
const auto ext = file_name.split(".").back().toLower();
auto status = true;
if (ext == "png") {
status = m_plot->savePng(file_name);
} else if (ext == "jpg") {
status = m_plot->saveJpg(file_name);
} else if (ext == "bmp") {
status = m_plot->saveBmp(file_name);
} else {
QMessageBox::warning(this, tr("Save Image"),
tr("Unknown extension: %1")
.arg(ext));
}
if (!status) {
QMessageBox::warning(this, tr("Save Image"),
tr("Error saving image: %1")
.arg(QDir::toNativeSeparators(file_name)));
}
}
}
void TrendWindow::update_min_max(const double value) noexcept
{
if (!m_fixed_limits) {
if (value > m_maxy) {
m_maxy = value;
} else if (value < m_miny) {
m_miny = value;
} else {
}
}
}
bool TrendWindow::save_register_set(const QString &path)
{
QStringList header;
header << tr("Register number") << tr("Device ID/Node") << tr("Line Color");
for (const auto i: m_timestamps) {
header << QString::number(i);
}
QtCSV::StringData csv_data;
csv_data.addRow(header);
for (const auto &i: m_data) {
QStringList row;
row << QString::number(i.second->m_reg_number)
<< QString::number(i.second->m_device_id)
<< QPen(*(i.second)).color().name();
for (auto index=0; index<m_timestamps.size(); ++index) {
row << QString::number((*(i.second))[index]);
}
csv_data.addRow(row);
}
return QtCSV::Writer::write(path, csv_data);
}
QDomElement TrendWindow::save_configuration(QDomDocument &root) const
{
auto trend = root.createElement("trend");
const auto position = pos();
const auto w_size = size();
trend.setAttribute("w", QString::number(w_size.width()));
trend.setAttribute("h", QString::number(w_size.height()));
trend.setAttribute("x", QString::number(position.x()));
trend.setAttribute("y", QString::number(position.y()));
trend.setAttribute("min", QString::number(m_miny));
trend.setAttribute("max", QString::number(m_maxy));
trend.setAttribute("fixed", QString::number(int(m_fixed_limits)));
trend.setAttribute("points", QString::number(m_timestamps.size()));
for (const auto &i: m_data) {
auto line = root.createElement("trend_line");
i.second->save_configuration(line);
trend.appendChild(line);
}
return trend;
}
bool TrendWindow::load_configuration(const QDomElement &node)
{
if (m_data.size() > 0) {
return false;
}
bool okmin, okmax;
const auto w = node.attribute("w", "-1").toInt();
const auto h = node.attribute("h", "-1").toInt();
const auto points = node.attribute("points", "-1").toInt();
const auto fixed = node.attribute("fixed", "-1").toInt();
const auto x = node.attribute("x", "");
const auto y = node.attribute("y", "");
const auto min = node.attribute("min", "[bad]").toDouble(&okmin);
const auto max = node.attribute("max", "[bad]").toDouble(&okmax);
if ((w <= 0) || (h <= 0) || (points <= 0) || (fixed < 0) ||
(x.size() == 0) || (y.size() == 0) || !okmin || !okmax) {
return false;
}
resize_history(points, false);
m_fixed_limits = bool(fixed);
m_miny = min;
m_maxy = max;
QVector<TrendLine*> new_lines;
const auto &children = node.childNodes();
new_lines.reserve(children.count());
for (auto i=0; i<children.count(); ++i) {
const auto &node = children.at(i);
if (node.isElement() && node.nodeName() == "trend_line") {
const auto &element = node.toElement();
const auto reg = element.attribute("register", "-1").toInt();
const auto node = element.attribute("node", "-1").toInt();
const auto is_signed = element.attribute("signed", "-1").toInt();
bool okm, okb;
const auto m = element.attribute("m", "[bad]").toDouble(&okm);
const auto b = element.attribute("b", "[bad]").toDouble(&okb);
const auto color = QColor(element.attribute("color", "[bad]"));
if ((reg < 1) || (node < 0) || (is_signed < 0) || !okm || !okb) {
return false;
}
auto line = new TrendLine(this, quint16(reg), quint8(node));
new_lines.append(line);
line->configure(m, b, bool(is_signed));
line->set_color(color);
}
}
QTimer::singleShot(160, this, [=]() {
resize(w, h);
move(x.toInt(), y.toInt());
for (auto i: new_lines) {
add_trend(i);
}
});
return true;
}
void TrendWindow::resize_history(const int points, bool redraw)
{
while (m_timestamps.size() > points) {
m_timestamps.removeFirst();
}
auto earliest = m_timestamps.first();
while (m_timestamps.size() < points) {
--earliest;
m_timestamps.prepend(earliest);
}
for (auto &i: m_data) {
i.second->resize(points);
}
if (redraw) {
redraw_graph();
}
}