##// END OF EJS Templates
Shifts tooltip to mouse
Alexandre Leroux -
r578:4cbf5bf3dd44
parent child
Show More
@@ -1,102 +1,105
1 1 #include "Visualization/VisualizationGraphRenderingDelegate.h"
2 2 #include "Visualization/qcustomplot.h"
3 3
4 4 #include <Common/DateUtils.h>
5 5
6 6 namespace {
7 7
8 8 const auto DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd hh:mm:ss:zzz");
9 9
10 10 const auto TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2");
11 11
12 /// Offset used to shift the tooltip of the mouse
13 const auto TOOLTIP_OFFSET = QPoint{20, 20};
14
12 15 /// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle)
13 16 const auto TOOLTIP_RECT = QRect{10, 10, 10, 10};
14 17
15 18 /// Timeout after which the tooltip is displayed
16 19 const auto TOOLTIP_TIMEOUT = 500;
17 20
18 21 /// Formats a data value according to the axis on which it is present
19 22 QString formatValue(double value, const QCPAxis &axis)
20 23 {
21 24 // If the axis is a time axis, formats the value as a date
22 25 if (auto axisTicker = qSharedPointerDynamicCast<QCPAxisTickerDateTime>(axis.ticker())) {
23 26 return DateUtils::dateTime(value, axisTicker->dateTimeSpec()).toString(DATETIME_FORMAT);
24 27 }
25 28 else {
26 29 return QString::number(value);
27 30 }
28 31 }
29 32
30 33 void initPointTracerStyle(QCPItemTracer &tracer) noexcept
31 34 {
32 35 tracer.setInterpolating(false);
33 36 tracer.setStyle(QCPItemTracer::tsCircle);
34 37 tracer.setSize(3);
35 38 tracer.setPen(QPen(Qt::black));
36 39 tracer.setBrush(Qt::black);
37 40 }
38 41
39 42 } // namespace
40 43
41 44 struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate {
42 45 explicit VisualizationGraphRenderingDelegatePrivate(QCustomPlot &plot)
43 46 : m_Plot{plot}, m_PointTracer{new QCPItemTracer{&plot}}, m_TracerTimer{}
44 47 {
45 48 initPointTracerStyle(*m_PointTracer);
46 49
47 50 m_TracerTimer.setInterval(TOOLTIP_TIMEOUT);
48 51 m_TracerTimer.setSingleShot(true);
49 52 }
50 53
51 54 QCustomPlot &m_Plot;
52 55 QCPItemTracer *m_PointTracer;
53 56 QTimer m_TracerTimer;
54 57 };
55 58
56 59 VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate(QCustomPlot &plot)
57 60 : impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(plot)}
58 61 {
59 62 }
60 63
61 64 void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept
62 65 {
63 66 // Cancels pending refresh
64 67 impl->m_TracerTimer.disconnect();
65 68
66 69 // Reinits tracers
67 70 impl->m_PointTracer->setGraph(nullptr);
68 71 impl->m_PointTracer->setVisible(false);
69 72 impl->m_Plot.replot();
70 73
71 74 // Gets the graph under the mouse position
72 75 auto eventPos = event->pos();
73 76 if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) {
74 77 auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x());
75 78 auto graphData = graph->data();
76 79
77 80 // Gets the closest data point to the mouse
78 81 auto graphDataIt = graphData->findBegin(mouseKey);
79 82 if (graphDataIt != graphData->constEnd()) {
80 83 auto key = formatValue(graphDataIt->key, *graph->keyAxis());
81 84 auto value = formatValue(graphDataIt->value, *graph->valueAxis());
82 85
83 86 // Displays point tracer
84 87 impl->m_PointTracer->setGraph(graph);
85 88 impl->m_PointTracer->setGraphKey(graphDataIt->key);
86 89 impl->m_PointTracer->setLayer(
87 90 impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer
88 91 impl->m_PointTracer->setVisible(true);
89 92 impl->m_Plot.replot();
90 93
91 94 // Starts timer to show tooltip after timeout
92 95 auto showTooltip = [ tooltip = TOOLTIP_FORMAT.arg(key, value), eventPos, this ]()
93 96 {
94 QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos), tooltip, &impl->m_Plot,
95 TOOLTIP_RECT);
97 QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip,
98 &impl->m_Plot, TOOLTIP_RECT);
96 99 };
97 100
98 101 QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip);
99 102 impl->m_TracerTimer.start();
100 103 }
101 104 }
102 105 }
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