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Alexandre Leroux - - Load All Authors

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VisualizationGraphRenderingDelegate.cpp
275 lines | 9.2 KiB | text/x-c | CppLexer
/ gui / src / Visualization / VisualizationGraphRenderingDelegate.cpp
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Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480 #include "Visualization/VisualizationGraphRenderingDelegate.h"
Alexandre Leroux
Passes directly GraphWidget in delegate...
 r725 #include "Visualization/VisualizationGraphWidget.h"
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480 #include "Visualization/qcustomplot.h"
Alexandre Leroux
Uses the same time spec (UTC) as axis for tooltips on graph
 r490 #include <Common/DateUtils.h>
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 #include <Data/IDataSeries.h>
Alexandre Leroux
Adds title and close items in plot overlay
 r726 #include <SqpApplication.h>
Alexandre Leroux
Inits tracers and timer...
 r482 namespace {
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 /// Name of the axes layer in QCustomPlot
const auto AXES_LAYER = QStringLiteral("axes");
Alexandre Leroux
Show tracers method (1)...
 r483 const auto DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd hh:mm:ss:zzz");
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 /// Format for datetimes on a axis
const auto DATETIME_TICKER_FORMAT = QStringLiteral("yyyy/MM/dd \nhh:mm:ss");
/// Icon used to show x-axis properties
const auto HIDE_AXIS_ICON_PATH = QStringLiteral(":/icones/down.png");
Alexandre Leroux
Adds title and close items in plot overlay
 r726 /// Name of the overlay layer in QCustomPlot
const auto OVERLAY_LAYER = QStringLiteral("overlay");
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 /// Pixmap used to show x-axis properties
const auto SHOW_AXIS_ICON_PATH = QStringLiteral(":/icones/up.png");
Alexandre Leroux
Uses Qt tooltips instead of QCPTextItem...
 r576 const auto TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2");
Alexandre Leroux
Show tracers method (1)...
 r483
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Shifts tooltip to mouse
 r578 /// Offset used to shift the tooltip of the mouse
const auto TOOLTIP_OFFSET = QPoint{20, 20};
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Uses Qt tooltips instead of QCPTextItem...
 r576 /// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle)
const auto TOOLTIP_RECT = QRect{10, 10, 10, 10};
/// Timeout after which the tooltip is displayed
const auto TOOLTIP_TIMEOUT = 500;
Alexandre Leroux
Inits tracers and timer...
 r482
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 /// Generates the appropriate ticker for an axis, depending on whether the axis displays time or
/// non-time data
QSharedPointer<QCPAxisTicker> axisTicker(bool isTimeAxis)
{
if (isTimeAxis) {
auto dateTicker = QSharedPointer<QCPAxisTickerDateTime>::create();
dateTicker->setDateTimeFormat(DATETIME_TICKER_FORMAT);
dateTicker->setDateTimeSpec(Qt::UTC);
return dateTicker;
}
else {
// default ticker
return QSharedPointer<QCPAxisTicker>::create();
}
}
Alexandre Leroux
Show tracers method (1)...
 r483 /// 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
Alexandre Leroux
Uses the same time spec (UTC) as axis for tooltips on graph
 r490 if (auto axisTicker = qSharedPointerDynamicCast<QCPAxisTickerDateTime>(axis.ticker())) {
return DateUtils::dateTime(value, axisTicker->dateTimeSpec()).toString(DATETIME_FORMAT);
}
else {
return QString::number(value);
}
Alexandre Leroux
Show tracers method (1)...
 r483 }
Alexandre Leroux
Sets tracers' styles
 r485
void initPointTracerStyle(QCPItemTracer &tracer) noexcept
{
tracer.setInterpolating(false);
Alexandre Leroux
Replaces "Plus" cursor by "Circle" cursor
 r577 tracer.setStyle(QCPItemTracer::tsCircle);
tracer.setSize(3);
Alexandre Leroux
Sets tracers' styles
 r485 tracer.setPen(QPen(Qt::black));
tracer.setBrush(Qt::black);
}
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 QPixmap pixmap(const QString &iconPath) noexcept
{
return QIcon{iconPath}.pixmap(QSize{16, 16});
}
Alexandre Leroux
Adds title and close items in plot overlay
 r726 void initClosePixmapStyle(QCPItemPixmap &pixmap) noexcept
{
// Icon
pixmap.setPixmap(
sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton).pixmap(QSize{16, 16}));
// Position
pixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
pixmap.topLeft->setCoords(1, 0);
pixmap.setClipToAxisRect(false);
// Can be selected
pixmap.setSelectable(true);
}
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 void initXAxisPixmapStyle(QCPItemPixmap &itemPixmap) noexcept
{
// Icon
itemPixmap.setPixmap(pixmap(HIDE_AXIS_ICON_PATH));
// Position
itemPixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
itemPixmap.topLeft->setCoords(0, 1);
itemPixmap.setClipToAxisRect(false);
// Can be selected
itemPixmap.setSelectable(true);
}
Alexandre Leroux
Adds title and close items in plot overlay
 r726 void initTitleTextStyle(QCPItemText &text) noexcept
{
// Font and background styles
text.setColor(Qt::gray);
text.setBrush(Qt::white);
// Position
text.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft);
text.position->setType(QCPItemPosition::ptAxisRectRatio);
text.position->setCoords(0.5, 0);
}
Alexandre Leroux
Inits tracers and timer...
 r482 } // namespace
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480 struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate {
Alexandre Leroux
Passes directly GraphWidget in delegate...
 r725 explicit VisualizationGraphRenderingDelegatePrivate(VisualizationGraphWidget &graphWidget)
: m_Plot{graphWidget.plot()},
m_PointTracer{new QCPItemTracer{&m_Plot}},
m_TracerTimer{},
Alexandre Leroux
Adds title and close items in plot overlay
 r726 m_ClosePixmap{new QCPItemPixmap{&m_Plot}},
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 m_TitleText{new QCPItemText{&m_Plot}},
m_XAxisPixmap{new QCPItemPixmap{&m_Plot}},
m_ShowXAxis{true},
m_XAxisLabel{}
Alexandre Leroux
Inits tracers and timer...
 r482 {
Alexandre Leroux
Sets tracers' styles
 r485 initPointTracerStyle(*m_PointTracer);
Alexandre Leroux
Inits tracers and timer...
 r482
Alexandre Leroux
Uses Qt tooltips instead of QCPTextItem...
 r576 m_TracerTimer.setInterval(TOOLTIP_TIMEOUT);
Alexandre Leroux
Inits tracers and timer...
 r482 m_TracerTimer.setSingleShot(true);
Alexandre Leroux
Adds title and close items in plot overlay
 r726
// Inits "close button" in plot overlay
m_ClosePixmap->setLayer(OVERLAY_LAYER);
initClosePixmapStyle(*m_ClosePixmap);
Alexandre Leroux
Calls 'close graph' action when selecting close item in overlay
 r727
// Connects pixmap selection to graph widget closing
QObject::connect(m_ClosePixmap, &QCPItemPixmap::selectionChanged,
[&graphWidget](bool selected) {
if (selected) {
graphWidget.close();
}
});
Alexandre Leroux
Adds title and close items in plot overlay
 r726 // Inits graph name in plot overlay
m_TitleText->setLayer(OVERLAY_LAYER);
m_TitleText->setText(graphWidget.name());
initTitleTextStyle(*m_TitleText);
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729
// Inits "show x-axis button" in plot overlay
m_XAxisPixmap->setLayer(OVERLAY_LAYER);
initXAxisPixmapStyle(*m_XAxisPixmap);
// Connects pixmap selection to graph x-axis showing/hiding
QObject::connect(m_XAxisPixmap, &QCPItemPixmap::selectionChanged, [this]() {
if (m_XAxisPixmap->selected()) {
// Changes the selection state and refreshes the x-axis
m_ShowXAxis = !m_ShowXAxis;
updateXAxisState();
m_Plot.layer(AXES_LAYER)->replot();
// Deselects the x-axis pixmap and updates icon
m_XAxisPixmap->setSelected(false);
m_XAxisPixmap->setPixmap(
pixmap(m_ShowXAxis ? HIDE_AXIS_ICON_PATH : SHOW_AXIS_ICON_PATH));
m_Plot.layer(OVERLAY_LAYER)->replot();
}
});
}
/// Updates state of x-axis according to the current selection of x-axis pixmap
/// @remarks the method doesn't call plot refresh
void updateXAxisState() noexcept
{
m_Plot.xAxis->setTickLabels(m_ShowXAxis);
m_Plot.xAxis->setLabel(m_ShowXAxis ? m_XAxisLabel : QString{});
Alexandre Leroux
Inits tracers and timer...
 r482 }
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480
QCustomPlot &m_Plot;
Alexandre Leroux
Inits tracers and timer...
 r482 QCPItemTracer *m_PointTracer;
QTimer m_TracerTimer;
Alexandre Leroux
Adds title and close items in plot overlay
 r726 QCPItemPixmap *m_ClosePixmap; /// Graph's close button
QCPItemText *m_TitleText; /// Graph's title
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 QCPItemPixmap *m_XAxisPixmap;
bool m_ShowXAxis; /// X-axis properties are shown or hidden
QString m_XAxisLabel;
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480 };
Alexandre Leroux
Passes directly GraphWidget in delegate...
 r725 VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate(
VisualizationGraphWidget &graphWidget)
: impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(graphWidget)}
Alexandre Leroux
Creates a delegate offering methods for rendering a graph
 r480 {
}
Alexandre Leroux
Creates method that will display a tooltip and a tracer with data point information after a while
 r481
void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept
{
Alexandre Leroux
Inits tracers and timer...
 r482 // Cancels pending refresh
impl->m_TracerTimer.disconnect();
Alexandre Leroux
Uses Qt tooltips instead of QCPTextItem...
 r576 // Reinits tracers
impl->m_PointTracer->setGraph(nullptr);
impl->m_PointTracer->setVisible(false);
impl->m_Plot.replot();
// Gets the graph under the mouse position
auto eventPos = event->pos();
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());
// Displays point tracer
impl->m_PointTracer->setGraph(graph);
impl->m_PointTracer->setGraphKey(graphDataIt->key);
impl->m_PointTracer->setLayer(
impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer
impl->m_PointTracer->setVisible(true);
Alexandre Leroux
Show tracers method (2)...
 r484 impl->m_Plot.replot();
Alexandre Leroux
Inits tracers and timer...
 r482
Alexandre Leroux
Uses Qt tooltips instead of QCPTextItem...
 r576 // Starts timer to show tooltip after timeout
auto showTooltip = [ tooltip = TOOLTIP_FORMAT.arg(key, value), eventPos, this ]()
{
Alexandre Leroux
Shifts tooltip to mouse
 r578 QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip,
&impl->m_Plot, TOOLTIP_RECT);
Alexandre Leroux
Uses Qt tooltips instead of QCPTextItem...
 r576 };
QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip);
impl->m_TracerTimer.start();
}
}
Alexandre Leroux
Creates method that will display a tooltip and a tracer with data point information after a while
 r481 }
Alexandre Leroux
Shows/hides plot overlay when entering/leaving graph
 r728
Alexandre Leroux
Adds button on plot overlay to show/hide x-axis properties
 r729 void VisualizationGraphRenderingDelegate::setAxesProperties(const Unit &xAxisUnit,
const Unit &valuesUnit) noexcept
{
// Stores x-axis label to be able to retrieve it when x-axis pixmap is unselected
impl->m_XAxisLabel = xAxisUnit.m_Name;
auto setAxisProperties = [](auto axis, const auto &unit) {
// label (unit name)
axis->setLabel(unit.m_Name);
// ticker (depending on the type of unit)
axis->setTicker(axisTicker(unit.m_TimeUnit));
};
setAxisProperties(impl->m_Plot.xAxis, xAxisUnit);
setAxisProperties(impl->m_Plot.yAxis, valuesUnit);
// Updates x-axis state
impl->updateXAxisState();
impl->m_Plot.layer(AXES_LAYER)->replot();
}
Alexandre Leroux
Shows/hides plot overlay when entering/leaving graph
 r728 void VisualizationGraphRenderingDelegate::showGraphOverlay(bool show) noexcept
{
auto overlay = impl->m_Plot.layer(OVERLAY_LAYER);
overlay->setVisible(show);
overlay->replot();
}