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1 | 1 | #include "Visualization/VisualizationGraphRenderingDelegate.h" |
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2 | 2 | #include "Visualization/AxisRenderingUtils.h" |
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3 | 3 | #include "Visualization/ColorScaleEditor.h" |
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4 | 4 | #include "Visualization/PlottablesRenderingUtils.h" |
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5 | 5 | #include "Visualization/SqpColorScale.h" |
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6 | 6 | #include "Visualization/VisualizationGraphWidget.h" |
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7 | 7 | #include "Visualization/qcustomplot.h" |
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8 | 8 | |
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9 | 9 | #include <Common/DateUtils.h> |
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10 | 10 | |
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11 | 11 | #include <Data/IDataSeries.h> |
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12 | 12 | |
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13 | 13 | #include <SqpApplication.h> |
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14 | 14 | |
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15 | 15 | namespace { |
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16 | 16 | |
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17 | 17 | /// Name of the axes layer in QCustomPlot |
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18 | 18 | const auto AXES_LAYER = QStringLiteral("axes"); |
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19 | 19 | |
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20 | 20 | /// Icon used to show x-axis properties |
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21 | 21 | const auto HIDE_AXIS_ICON_PATH = QStringLiteral(":/icones/down.png"); |
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22 | 22 | |
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23 | 23 | /// Name of the overlay layer in QCustomPlot |
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24 | 24 | const auto OVERLAY_LAYER = QStringLiteral("overlay"); |
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25 | 25 | |
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26 | 26 | /// Pixmap used to show x-axis properties |
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27 | 27 | const auto SHOW_AXIS_ICON_PATH = QStringLiteral(":/icones/up.png"); |
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28 | 28 | |
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29 | 29 | /// Tooltip format for graphs |
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30 | 30 | const auto GRAPH_TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2"); |
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31 | 31 | |
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32 | 32 | /// Tooltip format for colormaps |
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33 | 33 | const auto COLORMAP_TOOLTIP_FORMAT = QStringLiteral("x: %1\ny: %2\nvalue: %3"); |
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34 | 34 | |
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35 | 35 | /// Offset used to shift the tooltip of the mouse |
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36 | 36 | const auto TOOLTIP_OFFSET = QPoint{20, 20}; |
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37 | 37 | |
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38 | 38 | /// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle) |
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39 | 39 | const auto TOOLTIP_RECT = QRect{10, 10, 10, 10}; |
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40 | 40 | |
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41 | 41 | /// Timeout after which the tooltip is displayed |
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42 | 42 | const auto TOOLTIP_TIMEOUT = 500; |
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43 | 43 | |
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44 | 44 | void initPointTracerStyle(QCPItemTracer &tracer) noexcept |
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45 | 45 | { |
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46 | 46 | tracer.setInterpolating(false); |
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47 | 47 | tracer.setStyle(QCPItemTracer::tsCircle); |
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48 | 48 | tracer.setSize(3); |
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49 | 49 | tracer.setPen(QPen(Qt::black)); |
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50 | 50 | tracer.setBrush(Qt::black); |
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51 | 51 | } |
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52 | 52 | |
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53 | 53 | QPixmap pixmap(const QString &iconPath) noexcept |
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54 | 54 | { |
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55 | 55 | return QIcon{iconPath}.pixmap(QSize{16, 16}); |
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56 | 56 | } |
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57 | 57 | |
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58 | 58 | void initClosePixmapStyle(QCPItemPixmap &pixmap) noexcept |
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59 | 59 | { |
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60 | 60 | // Icon |
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61 | 61 | pixmap.setPixmap( |
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62 | 62 | sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton).pixmap(QSize{16, 16})); |
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63 | 63 | |
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64 | 64 | // Position |
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65 | 65 | pixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio); |
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66 | 66 | pixmap.topLeft->setCoords(1, 0); |
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67 | 67 | pixmap.setClipToAxisRect(false); |
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68 | 68 | |
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69 | 69 | // Can be selected |
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70 | 70 | pixmap.setSelectable(true); |
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71 | 71 | } |
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72 | 72 | |
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73 | 73 | void initXAxisPixmapStyle(QCPItemPixmap &itemPixmap) noexcept |
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74 | 74 | { |
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75 | 75 | // Icon |
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76 | 76 | itemPixmap.setPixmap(pixmap(HIDE_AXIS_ICON_PATH)); |
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77 | 77 | |
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78 | 78 | // Position |
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79 | 79 | itemPixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio); |
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80 | 80 | itemPixmap.topLeft->setCoords(0, 1); |
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81 | 81 | itemPixmap.setClipToAxisRect(false); |
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82 | 82 | |
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83 | 83 | // Can be selected |
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84 | 84 | itemPixmap.setSelectable(true); |
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85 | 85 | } |
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86 | 86 | |
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87 | 87 | void initTitleTextStyle(QCPItemText &text) noexcept |
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88 | 88 | { |
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89 | 89 | // Font and background styles |
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90 | 90 | text.setColor(Qt::gray); |
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91 | 91 | text.setBrush(Qt::white); |
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92 | 92 | |
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93 | 93 | // Position |
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94 | 94 | text.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft); |
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95 | 95 | text.position->setType(QCPItemPosition::ptAxisRectRatio); |
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96 | 96 | text.position->setCoords(0.5, 0); |
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97 | 97 | } |
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98 | 98 | |
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99 | 99 | /** |
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100 | 100 | * Returns the cell index (x or y) of a colormap according to the coordinate passed in parameter. |
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101 | 101 | * This method handles the fact that a colormap axis can be logarithmic or linear. |
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102 | 102 | * @param colormap the colormap for which to calculate the index |
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103 | 103 | * @param coord the coord to convert to cell index |
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104 | 104 | * @param xCoord calculates the x index if true, calculates y index if false |
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105 | 105 | * @return the cell index |
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106 | 106 | */ |
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107 | 107 | int colorMapCellIndex(const QCPColorMap &colormap, double coord, bool xCoord) |
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108 | 108 | { |
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109 | 109 | // Determines the axis of the colormap according to xCoord, and whether it is logarithmic or not |
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110 | 110 | auto isLogarithmic = (xCoord ? colormap.keyAxis() : colormap.valueAxis())->scaleType() |
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111 | 111 | == QCPAxis::stLogarithmic; |
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112 | 112 | |
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113 | 113 | if (isLogarithmic) { |
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114 | 114 | // For a logarithmic axis we can't use the conversion method of colormap, so we calculate |
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115 | 115 | // the index manually based on the position of the coordinate on the axis |
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116 | 116 | |
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117 | 117 | // Gets the axis range and the number of values between range bounds to calculate the step |
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118 | 118 | // between each value of the range |
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119 | 119 | auto range = xCoord ? colormap.data()->keyRange() : colormap.data()->valueRange(); |
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120 | 120 | auto nbValues = (xCoord ? colormap.data()->keySize() : colormap.data()->valueSize()) - 1; |
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121 | 121 | auto valueStep |
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122 | 122 | = (std::log10(range.upper) - std::log10(range.lower)) / static_cast<double>(nbValues); |
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123 | 123 | |
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124 | 124 | // According to the coord position, calculates the closest index in the range |
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125 | 125 | return std::round((std::log10(coord) - std::log10(range.lower)) / valueStep); |
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126 | 126 | } |
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127 | 127 | else { |
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128 | 128 | // For a linear axis, we use the conversion method of colormap |
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129 | 129 | int index; |
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130 | 130 | if (xCoord) { |
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131 | 131 | colormap.data()->coordToCell(coord, 0., &index, nullptr); |
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132 | 132 | } |
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133 | 133 | else { |
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134 | 134 | colormap.data()->coordToCell(0., coord, nullptr, &index); |
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135 | 135 | } |
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136 | 136 | |
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137 | 137 | return index; |
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138 | 138 | } |
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139 | 139 | } |
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140 | 140 | |
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141 | 141 | } // namespace |
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142 | 142 | |
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143 | 143 | struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate { |
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144 | 144 | explicit VisualizationGraphRenderingDelegatePrivate(VisualizationGraphWidget &graphWidget) |
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145 | 145 | : m_Plot{graphWidget.plot()}, |
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146 | 146 | m_PointTracer{new QCPItemTracer{&m_Plot}}, |
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147 | 147 | m_TracerTimer{}, |
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148 | 148 | m_ClosePixmap{new QCPItemPixmap{&m_Plot}}, |
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149 | 149 | m_TitleText{new QCPItemText{&m_Plot}}, |
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150 | 150 | m_XAxisPixmap{new QCPItemPixmap{&m_Plot}}, |
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151 | 151 | m_ShowXAxis{true}, |
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152 | 152 | m_XAxisLabel{}, |
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153 | 153 | m_ColorScale{SqpColorScale{m_Plot}} |
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154 | 154 | { |
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155 | 155 | initPointTracerStyle(*m_PointTracer); |
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156 | 156 | |
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157 | 157 | m_TracerTimer.setInterval(TOOLTIP_TIMEOUT); |
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158 | 158 | m_TracerTimer.setSingleShot(true); |
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159 | 159 | |
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160 | 160 | // Inits "close button" in plot overlay |
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161 | 161 | m_ClosePixmap->setLayer(OVERLAY_LAYER); |
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162 | 162 | initClosePixmapStyle(*m_ClosePixmap); |
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163 | 163 | |
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164 | 164 | // Connects pixmap selection to graph widget closing |
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165 | 165 | QObject::connect(m_ClosePixmap, &QCPItemPixmap::selectionChanged, |
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166 | 166 | [&graphWidget](bool selected) { |
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167 | 167 | if (selected) { |
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168 | 168 | graphWidget.close(); |
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169 | 169 | } |
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170 | 170 | }); |
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171 | 171 | |
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172 | 172 | // Inits graph name in plot overlay |
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173 | 173 | m_TitleText->setLayer(OVERLAY_LAYER); |
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174 | 174 | m_TitleText->setText(graphWidget.name()); |
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175 | 175 | initTitleTextStyle(*m_TitleText); |
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176 | 176 | |
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177 | 177 | // Inits "show x-axis button" in plot overlay |
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178 | 178 | m_XAxisPixmap->setLayer(OVERLAY_LAYER); |
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179 | 179 | initXAxisPixmapStyle(*m_XAxisPixmap); |
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180 | 180 | |
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181 | 181 | // Connects pixmap selection to graph x-axis showing/hiding |
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182 | 182 | QObject::connect(m_XAxisPixmap, &QCPItemPixmap::selectionChanged, [this]() { |
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183 | 183 | if (m_XAxisPixmap->selected()) { |
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184 | 184 | // Changes the selection state and refreshes the x-axis |
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185 | 185 | m_ShowXAxis = !m_ShowXAxis; |
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186 | 186 | updateXAxisState(); |
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187 | 187 | m_Plot.layer(AXES_LAYER)->replot(); |
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188 | 188 | |
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189 | 189 | // Deselects the x-axis pixmap and updates icon |
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190 | 190 | m_XAxisPixmap->setSelected(false); |
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191 | 191 | m_XAxisPixmap->setPixmap( |
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192 | 192 | pixmap(m_ShowXAxis ? HIDE_AXIS_ICON_PATH : SHOW_AXIS_ICON_PATH)); |
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193 | 193 | m_Plot.layer(OVERLAY_LAYER)->replot(); |
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194 | 194 | } |
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195 | 195 | }); |
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196 | 196 | } |
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197 | 197 | |
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198 | 198 | /// Updates state of x-axis according to the current selection of x-axis pixmap |
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199 | 199 | /// @remarks the method doesn't call plot refresh |
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200 | 200 | void updateXAxisState() noexcept |
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201 | 201 | { |
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202 | 202 | m_Plot.xAxis->setTickLabels(m_ShowXAxis); |
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203 | 203 | m_Plot.xAxis->setLabel(m_ShowXAxis ? m_XAxisLabel : QString{}); |
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204 | 204 | } |
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205 | 205 | |
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206 | 206 | QCustomPlot &m_Plot; |
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207 | 207 | QCPItemTracer *m_PointTracer; |
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208 | 208 | QTimer m_TracerTimer; |
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209 | 209 | QCPItemPixmap *m_ClosePixmap; /// Graph's close button |
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210 | 210 | QCPItemText *m_TitleText; /// Graph's title |
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211 | 211 | QCPItemPixmap *m_XAxisPixmap; |
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212 | 212 | bool m_ShowXAxis; /// X-axis properties are shown or hidden |
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213 | 213 | QString m_XAxisLabel; |
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214 | 214 | SqpColorScale m_ColorScale; /// Color scale used for some types of graphs (as spectrograms) |
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215 | 215 | }; |
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216 | 216 | |
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217 | 217 | VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate( |
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218 | 218 | VisualizationGraphWidget &graphWidget) |
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219 | 219 | : impl{spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(graphWidget)} |
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220 | 220 | { |
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221 | 221 | } |
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222 | 222 | |
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223 | 223 | void VisualizationGraphRenderingDelegate::onMouseDoubleClick(QMouseEvent *event) noexcept |
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224 | 224 | { |
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225 | 225 | // Opens color scale editor if color scale is double clicked |
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226 |
auto colorScale = |
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226 | auto colorScale = static_cast<QCPColorScale *>(impl->m_Plot.layoutElementAt(event->pos())); | |
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227 | 227 | if (impl->m_ColorScale.m_Scale == colorScale) { |
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228 | 228 | if (ColorScaleEditor{impl->m_ColorScale}.exec() == QDialog::Accepted) { |
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229 | 229 | impl->m_Plot.replot(); |
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230 | 230 | } |
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231 | 231 | } |
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232 | 232 | } |
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233 | 233 | |
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234 | 234 | void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexcept |
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235 | 235 | { |
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236 | 236 | // Cancels pending refresh |
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237 | 237 | impl->m_TracerTimer.disconnect(); |
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238 | 238 | |
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239 | 239 | // Reinits tracers |
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240 | 240 | impl->m_PointTracer->setGraph(nullptr); |
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241 | 241 | impl->m_PointTracer->setVisible(false); |
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242 | 242 | impl->m_Plot.replot(); |
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243 | 243 | |
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244 | 244 | QString tooltip{}; |
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245 | 245 | |
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246 | 246 | // Gets the graph under the mouse position |
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247 | 247 | auto eventPos = event->pos(); |
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248 | 248 | if (auto graph = qobject_cast<QCPGraph *>(impl->m_Plot.plottableAt(eventPos))) { |
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249 | 249 | auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x()); |
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250 | 250 | auto graphData = graph->data(); |
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251 | 251 | |
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252 | 252 | // Gets the closest data point to the mouse |
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253 | 253 | auto graphDataIt = graphData->findBegin(mouseKey); |
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254 | 254 | if (graphDataIt != graphData->constEnd()) { |
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255 | 255 | // Sets tooltip |
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256 | 256 | auto key = formatValue(graphDataIt->key, *graph->keyAxis()); |
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257 | 257 | auto value = formatValue(graphDataIt->value, *graph->valueAxis()); |
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258 | 258 | tooltip = GRAPH_TOOLTIP_FORMAT.arg(key, value); |
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259 | 259 | |
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260 | 260 | // Displays point tracer |
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261 | 261 | impl->m_PointTracer->setGraph(graph); |
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262 | 262 | impl->m_PointTracer->setGraphKey(graphDataIt->key); |
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263 | 263 | impl->m_PointTracer->setLayer( |
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264 | 264 | impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer |
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265 | 265 | impl->m_PointTracer->setVisible(true); |
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266 | 266 | impl->m_Plot.replot(); |
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267 | 267 | } |
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268 | 268 | } |
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269 | 269 | else if (auto colorMap = qobject_cast<QCPColorMap *>(impl->m_Plot.plottableAt(eventPos))) { |
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270 | 270 | // Gets x and y coords |
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271 | 271 | auto x = colorMap->keyAxis()->pixelToCoord(eventPos.x()); |
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272 | 272 | auto y = colorMap->valueAxis()->pixelToCoord(eventPos.y()); |
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273 | 273 | |
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274 | 274 | // Calculates x and y cell indexes, and retrieves the underlying value |
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275 | 275 | auto xCellIndex = colorMapCellIndex(*colorMap, x, true); |
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276 | 276 | auto yCellIndex = colorMapCellIndex(*colorMap, y, false); |
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277 | 277 | auto value = colorMap->data()->cell(xCellIndex, yCellIndex); |
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278 | 278 | |
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279 | 279 | // Sets tooltips |
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280 | 280 | tooltip = COLORMAP_TOOLTIP_FORMAT.arg(formatValue(x, *colorMap->keyAxis()), |
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281 | 281 | formatValue(y, *colorMap->valueAxis()), |
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282 | 282 | formatValue(value, *colorMap->colorScale()->axis())); |
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283 | 283 | } |
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284 | 284 | |
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285 | 285 | if (!tooltip.isEmpty()) { |
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286 | 286 | // Starts timer to show tooltip after timeout |
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287 | 287 | auto showTooltip = [tooltip, eventPos, this]() { |
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288 | 288 | QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip, |
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289 | 289 | &impl->m_Plot, TOOLTIP_RECT); |
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290 | 290 | }; |
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291 | 291 | |
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292 | 292 | QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip); |
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293 | 293 | impl->m_TracerTimer.start(); |
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294 | 294 | } |
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295 | 295 | } |
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296 | 296 | |
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297 | 297 | void VisualizationGraphRenderingDelegate::onPlotUpdated() noexcept |
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298 | 298 | { |
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299 | 299 | // Updates color scale bounds |
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300 | 300 | impl->m_ColorScale.updateDataRange(); |
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301 | 301 | impl->m_Plot.replot(); |
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302 | 302 | } |
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303 | 303 | |
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304 | 304 | void VisualizationGraphRenderingDelegate::setAxesProperties( |
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305 | 305 | std::shared_ptr<IDataSeries> dataSeries) noexcept |
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306 | 306 | { |
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307 | 307 | // Stores x-axis label to be able to retrieve it when x-axis pixmap is unselected |
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308 | 308 | impl->m_XAxisLabel = dataSeries->xAxisUnit().m_Name; |
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309 | 309 | |
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310 | 310 | auto axisHelper = IAxisHelperFactory::create(dataSeries); |
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311 | 311 | axisHelper->setProperties(impl->m_Plot, impl->m_ColorScale); |
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312 | 312 | |
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313 | 313 | // Updates x-axis state |
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314 | 314 | impl->updateXAxisState(); |
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315 | 315 | |
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316 | 316 | impl->m_Plot.layer(AXES_LAYER)->replot(); |
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317 | 317 | } |
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318 | 318 | |
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319 | 319 | void VisualizationGraphRenderingDelegate::setPlottablesProperties( |
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320 | 320 | std::shared_ptr<IDataSeries> dataSeries, PlottablesMap &plottables) noexcept |
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321 | 321 | { |
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322 | 322 | auto plottablesHelper = IPlottablesHelperFactory::create(dataSeries); |
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323 | 323 | plottablesHelper->setProperties(plottables); |
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324 | 324 | } |
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325 | 325 | |
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326 | 326 | void VisualizationGraphRenderingDelegate::showGraphOverlay(bool show) noexcept |
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327 | 327 | { |
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328 | 328 | auto overlay = impl->m_Plot.layer(OVERLAY_LAYER); |
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329 | 329 | overlay->setVisible(show); |
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330 | 330 | overlay->replot(); |
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331 | 331 | } |
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