|
|
#include "Visualization/VisualizationGraphRenderingDelegate.h"
|
|
|
#include "Visualization/qcustomplot.h"
|
|
|
|
|
|
#include <Common/DateUtils.h>
|
|
|
|
|
|
namespace {
|
|
|
|
|
|
const auto DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd hh:mm:ss:zzz");
|
|
|
|
|
|
const auto TEXT_TRACER_FORMAT = QStringLiteral("key: %1\nvalue: %2");
|
|
|
|
|
|
/// Timeout after which a tracer is displayed
|
|
|
const auto TRACER_TIMEOUT = 500;
|
|
|
|
|
|
/// Formats a data value according to the axis on which it is present
|
|
|
QString formatValue(double value, const QCPAxis &axis)
|
|
|
{
|
|
|
// If the axis is a time axis, formats the value as a date
|
|
|
if (auto axisTicker = qSharedPointerDynamicCast<QCPAxisTickerDateTime>(axis.ticker())) {
|
|
|
return DateUtils::dateTime(value, axisTicker->dateTimeSpec()).toString(DATETIME_FORMAT);
|
|
|
}
|
|
|
else {
|
|
|
return QString::number(value);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void initPointTracerStyle(QCPItemTracer &tracer) noexcept
|
|
|
{
|
|
|
tracer.setInterpolating(false);
|
|
|
tracer.setStyle(QCPItemTracer::tsPlus);
|
|
|
tracer.setPen(QPen(Qt::black));
|
|
|
tracer.setBrush(Qt::black);
|
|
|
tracer.setSize(10);
|
|
|
}
|
|
|
|
|
|
void initTextTracerStyle(QCPItemText &tracer) noexcept
|
|
|
{
|
|
|
tracer.setPen(QPen{Qt::gray});
|
|
|
tracer.setBrush(Qt::white);
|
|
|
tracer.setPadding(QMargins{6, 6, 6, 6});
|
|
|
tracer.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft);
|
|
|
tracer.setTextAlignment(Qt::AlignLeft);
|
|
|
}
|
|
|
|
|
|
} // namespace
|
|
|
|
|
|
struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate {
|
|
|
explicit VisualizationGraphRenderingDelegatePrivate(QCustomPlot &plot)
|
|
|
: m_Plot{plot},
|
|
|
m_PointTracer{new QCPItemTracer{&plot}},
|
|
|
m_TextTracer{new QCPItemText{&plot}},
|
|
|
m_TracerTimer{}
|
|
|
{
|
|
|
initPointTracerStyle(*m_PointTracer);
|
|
|
initTextTracerStyle(*m_TextTracer);
|
|
|
|
|
|
m_TracerTimer.setInterval(TRACER_TIMEOUT);
|
|
|
m_TracerTimer.setSingleShot(true);
|
|
|
}
|
|
|
|
|
|
QCustomPlot &m_Plot;
|
|
|
QCPItemTracer *m_PointTracer;
|
|
|
QCPItemText *m_TextTracer;
|
|
|
QTimer m_TracerTimer;
|
|
|
};
|
|
|
|
|
|
VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate(QCustomPlot &plot)
|
|
|
: impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(plot)}
|
|
|
{
|
|
|
}
|
|
|
|
|
|
void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept
|
|
|
{
|
|
|
// Cancels pending refresh
|
|
|
impl->m_TracerTimer.disconnect();
|
|
|
|
|
|
auto showTracers = [ eventPos = event->pos(), this ]()
|
|
|
{
|
|
|
// Lambda function to display a tracer
|
|
|
auto displayTracer = [this](auto &tracer) {
|
|
|
// Tracer is set on top of the plot's main layer
|
|
|
tracer.setLayer(impl->m_Plot.layer("main"));
|
|
|
tracer.setVisible(true);
|
|
|
impl->m_Plot.replot();
|
|
|
};
|
|
|
|
|
|
// Reinits tracers
|
|
|
impl->m_PointTracer->setGraph(nullptr);
|
|
|
impl->m_PointTracer->setVisible(false);
|
|
|
impl->m_TextTracer->setVisible(false);
|
|
|
impl->m_Plot.replot();
|
|
|
|
|
|
// Gets the graph under the mouse position
|
|
|
if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) {
|
|
|
auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x());
|
|
|
auto graphData = graph->data();
|
|
|
|
|
|
// Gets the closest data point to the mouse
|
|
|
auto graphDataIt = graphData->findBegin(mouseKey);
|
|
|
if (graphDataIt != graphData->constEnd()) {
|
|
|
auto key = formatValue(graphDataIt->key, *graph->keyAxis());
|
|
|
auto value = formatValue(graphDataIt->value, *graph->valueAxis());
|
|
|
impl->m_TextTracer->setText(TEXT_TRACER_FORMAT.arg(key, value));
|
|
|
|
|
|
// Displays point tracer
|
|
|
impl->m_PointTracer->setGraph(graph);
|
|
|
impl->m_PointTracer->setGraphKey(graphDataIt->key);
|
|
|
displayTracer(*impl->m_PointTracer);
|
|
|
|
|
|
// Displays text tracer
|
|
|
auto tracerPosition = impl->m_TextTracer->position;
|
|
|
tracerPosition->setAxes(graph->keyAxis(), graph->valueAxis());
|
|
|
tracerPosition->setCoords(impl->m_PointTracer->position->key(),
|
|
|
impl->m_PointTracer->position->value());
|
|
|
displayTracer(*impl->m_TextTracer);
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
|
|
|
// Starts the timer to display tracers at timeout
|
|
|
QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTracers);
|
|
|
impl->m_TracerTimer.start();
|
|
|
}
|
|
|
|
