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1 | 1 | #include "Visualization/VisualizationGraphRenderingDelegate.h" |
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2 | 2 | #include "Visualization/VisualizationGraphWidget.h" |
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3 | 3 | #include "Visualization/qcustomplot.h" |
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4 | 4 | |
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5 | 5 | #include <Common/DateUtils.h> |
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6 | 6 | |
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7 | #include <SqpApplication.h> | |
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8 | ||
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7 | 9 | namespace { |
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8 | 10 | |
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9 | 11 | const auto DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd hh:mm:ss:zzz"); |
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10 | 12 | |
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13 | /// Name of the overlay layer in QCustomPlot | |
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14 | const auto OVERLAY_LAYER = QStringLiteral("overlay"); | |
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15 | ||
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11 | 16 | const auto TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2"); |
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12 | 17 | |
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13 | 18 | /// Offset used to shift the tooltip of the mouse |
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14 | 19 | const auto TOOLTIP_OFFSET = QPoint{20, 20}; |
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15 | 20 | |
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16 | 21 | /// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle) |
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17 | 22 | const auto TOOLTIP_RECT = QRect{10, 10, 10, 10}; |
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18 | 23 | |
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19 | 24 | /// Timeout after which the tooltip is displayed |
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20 | 25 | const auto TOOLTIP_TIMEOUT = 500; |
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21 | 26 | |
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22 | 27 | /// Formats a data value according to the axis on which it is present |
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23 | 28 | QString formatValue(double value, const QCPAxis &axis) |
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24 | 29 | { |
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25 | 30 | // If the axis is a time axis, formats the value as a date |
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26 | 31 | if (auto axisTicker = qSharedPointerDynamicCast<QCPAxisTickerDateTime>(axis.ticker())) { |
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27 | 32 | return DateUtils::dateTime(value, axisTicker->dateTimeSpec()).toString(DATETIME_FORMAT); |
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28 | 33 | } |
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29 | 34 | else { |
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30 | 35 | return QString::number(value); |
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31 | 36 | } |
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32 | 37 | } |
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33 | 38 | |
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34 | 39 | void initPointTracerStyle(QCPItemTracer &tracer) noexcept |
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35 | 40 | { |
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36 | 41 | tracer.setInterpolating(false); |
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37 | 42 | tracer.setStyle(QCPItemTracer::tsCircle); |
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38 | 43 | tracer.setSize(3); |
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39 | 44 | tracer.setPen(QPen(Qt::black)); |
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40 | 45 | tracer.setBrush(Qt::black); |
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41 | 46 | } |
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42 | 47 | |
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48 | void initClosePixmapStyle(QCPItemPixmap &pixmap) noexcept | |
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49 | { | |
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50 | // Icon | |
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51 | pixmap.setPixmap( | |
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52 | sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton).pixmap(QSize{16, 16})); | |
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53 | ||
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54 | // Position | |
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55 | pixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio); | |
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56 | pixmap.topLeft->setCoords(1, 0); | |
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57 | pixmap.setClipToAxisRect(false); | |
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58 | ||
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59 | // Can be selected | |
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60 | pixmap.setSelectable(true); | |
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61 | } | |
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62 | ||
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63 | void initTitleTextStyle(QCPItemText &text) noexcept | |
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64 | { | |
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65 | // Font and background styles | |
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66 | text.setColor(Qt::gray); | |
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67 | text.setBrush(Qt::white); | |
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68 | ||
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69 | // Position | |
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70 | text.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft); | |
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71 | text.position->setType(QCPItemPosition::ptAxisRectRatio); | |
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72 | text.position->setCoords(0.5, 0); | |
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73 | } | |
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74 | ||
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43 | 75 | } // namespace |
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44 | 76 | |
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45 | 77 | struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate { |
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46 | 78 | explicit VisualizationGraphRenderingDelegatePrivate(VisualizationGraphWidget &graphWidget) |
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47 | 79 | : m_Plot{graphWidget.plot()}, |
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48 | 80 | m_PointTracer{new QCPItemTracer{&m_Plot}}, |
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49 | 81 | m_TracerTimer{}, |
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82 | m_ClosePixmap{new QCPItemPixmap{&m_Plot}}, | |
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83 | m_TitleText{new QCPItemText{&m_Plot}} | |
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50 | 84 | { |
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51 | 85 | initPointTracerStyle(*m_PointTracer); |
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52 | 86 | |
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53 | 87 | m_TracerTimer.setInterval(TOOLTIP_TIMEOUT); |
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54 | 88 | m_TracerTimer.setSingleShot(true); |
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89 | ||
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90 | // Inits "close button" in plot overlay | |
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91 | m_ClosePixmap->setLayer(OVERLAY_LAYER); | |
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92 | initClosePixmapStyle(*m_ClosePixmap); | |
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93 | // Inits graph name in plot overlay | |
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94 | m_TitleText->setLayer(OVERLAY_LAYER); | |
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95 | m_TitleText->setText(graphWidget.name()); | |
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96 | initTitleTextStyle(*m_TitleText); | |
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55 | 97 | } |
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56 | 98 | |
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57 | 99 | QCustomPlot &m_Plot; |
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58 | 100 | QCPItemTracer *m_PointTracer; |
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59 | 101 | QTimer m_TracerTimer; |
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102 | QCPItemPixmap *m_ClosePixmap; /// Graph's close button | |
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103 | QCPItemText *m_TitleText; /// Graph's title | |
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60 | 104 | }; |
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61 | 105 | |
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62 | 106 | VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate( |
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63 | 107 | VisualizationGraphWidget &graphWidget) |
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64 | 108 | : impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(graphWidget)} |
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65 | 109 | { |
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66 | 110 | } |
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67 | 111 | |
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68 | 112 | void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept |
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69 | 113 | { |
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70 | 114 | // Cancels pending refresh |
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71 | 115 | impl->m_TracerTimer.disconnect(); |
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72 | 116 | |
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73 | 117 | // Reinits tracers |
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74 | 118 | impl->m_PointTracer->setGraph(nullptr); |
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75 | 119 | impl->m_PointTracer->setVisible(false); |
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76 | 120 | impl->m_Plot.replot(); |
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77 | 121 | |
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78 | 122 | // Gets the graph under the mouse position |
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79 | 123 | auto eventPos = event->pos(); |
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80 | 124 | if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) { |
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81 | 125 | auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x()); |
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82 | 126 | auto graphData = graph->data(); |
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83 | 127 | |
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84 | 128 | // Gets the closest data point to the mouse |
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85 | 129 | auto graphDataIt = graphData->findBegin(mouseKey); |
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86 | 130 | if (graphDataIt != graphData->constEnd()) { |
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87 | 131 | auto key = formatValue(graphDataIt->key, *graph->keyAxis()); |
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88 | 132 | auto value = formatValue(graphDataIt->value, *graph->valueAxis()); |
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89 | 133 | |
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90 | 134 | // Displays point tracer |
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91 | 135 | impl->m_PointTracer->setGraph(graph); |
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92 | 136 | impl->m_PointTracer->setGraphKey(graphDataIt->key); |
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93 | 137 | impl->m_PointTracer->setLayer( |
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94 | 138 | impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer |
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95 | 139 | impl->m_PointTracer->setVisible(true); |
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96 | 140 | impl->m_Plot.replot(); |
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97 | 141 | |
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98 | 142 | // Starts timer to show tooltip after timeout |
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99 | 143 | auto showTooltip = [ tooltip = TOOLTIP_FORMAT.arg(key, value), eventPos, this ]() |
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100 | 144 | { |
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101 | 145 | QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip, |
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102 | 146 | &impl->m_Plot, TOOLTIP_RECT); |
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103 | 147 | }; |
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104 | 148 | |
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105 | 149 | QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip); |
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106 | 150 | impl->m_TracerTimer.start(); |
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107 | 151 | } |
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108 | 152 | } |
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109 | 153 | } |
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