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Fix bug when creating two variables crash the app. ...
Fix bug when creating two variables crash the app. Variable as now invalid range and cache range at creation
Alexandre Leroux - - Load All Authors

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r729:94000392d1e8
r756:a7f60f6512e6
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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
Alexandre Leroux
Shifts tooltip to mouse
 r578 /// Offset used to shift the tooltip of the mouse
const auto TOOLTIP_OFFSET = QPoint{20, 20};
Alexandre Leroux
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();
}