| @@ -94,6 +94,48 void initTitleTextStyle(QCPItemText &text) noexcept | |||||
| 94 | text.position->setCoords(0.5, 0); |
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94 | text.position->setCoords(0.5, 0); | |
| 95 | } |
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95 | } | |
| 96 |
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96 | |||
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97 | /** | |||
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98 | * Returns the cell index (x or y) of a colormap according to the coordinate passed in parameter. | |||
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99 | * This method handles the fact that a colormap axis can be logarithmic or linear. | |||
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100 | * @param colormap the colormap for which to calculate the index | |||
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101 | * @param coord the coord to convert to cell index | |||
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102 | * @param xCoord calculates the x index if true, calculates y index if false | |||
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103 | * @return the cell index | |||
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104 | */ | |||
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105 | int colorMapCellIndex(const QCPColorMap &colormap, double coord, bool xCoord) | |||
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106 | { | |||
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107 | // Determines the axis of the colormap according to xCoord, and whether it is logarithmic or not | |||
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108 | auto isLogarithmic = (xCoord ? colormap.keyAxis() : colormap.valueAxis())->scaleType() | |||
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109 | == QCPAxis::stLogarithmic; | |||
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110 | ||||
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111 | if (isLogarithmic) { | |||
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112 | // For a logarithmic axis we can't use the conversion method of colormap, so we calculate | |||
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113 | // the index manually based on the position of the coordinate on the axis | |||
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114 | ||||
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115 | // Gets the axis range and the number of values between range bounds to calculate the step | |||
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116 | // between each value of the range | |||
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117 | auto range = xCoord ? colormap.data()->keyRange() : colormap.data()->valueRange(); | |||
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118 | auto nbValues = (xCoord ? colormap.data()->keySize() : colormap.data()->valueSize()) - 1; | |||
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119 | auto valueStep | |||
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120 | = (std::log10(range.upper) - std::log10(range.lower)) / static_cast<double>(nbValues); | |||
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121 | ||||
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122 | // According to the coord position, calculates the closest index in the range | |||
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123 | return std::round((std::log10(coord) - std::log10(range.lower)) / valueStep); | |||
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124 | } | |||
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125 | else { | |||
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126 | // For a linear axis, we use the conversion method of colormap | |||
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127 | int index; | |||
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128 | if (xCoord) { | |||
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129 | colormap.data()->coordToCell(coord, 0., &index, nullptr); | |||
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130 | } | |||
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131 | else { | |||
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132 | colormap.data()->coordToCell(0., coord, nullptr, &index); | |||
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133 | } | |||
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134 | ||||
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135 | return index; | |||
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136 | } | |||
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137 | } | |||
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138 | ||||
| 97 | } // namespace |
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139 | } // namespace | |
| 98 |
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140 | |||
| 99 | struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate { |
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141 | struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate { | |
| @@ -226,6 +268,12 void VisualizationGraphRenderingDelegate::onMouseMove(QMouseEvent *event) noexce | |||||
| 226 | // Gets x and y coords |
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268 | // Gets x and y coords | |
| 227 | auto x = colorMap->keyAxis()->pixelToCoord(eventPos.x()); |
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269 | auto x = colorMap->keyAxis()->pixelToCoord(eventPos.x()); | |
| 228 | auto y = colorMap->valueAxis()->pixelToCoord(eventPos.y()); |
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270 | auto y = colorMap->valueAxis()->pixelToCoord(eventPos.y()); | |
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271 | ||||
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272 | // Calculates x and y cell indexes, and retrieves the underlying value | |||
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273 | auto xCellIndex = colorMapCellIndex(*colorMap, x, true); | |||
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274 | auto yCellIndex = colorMapCellIndex(*colorMap, y, false); | |||
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275 | auto value = colorMap->data()->cell(xCellIndex, yCellIndex); | |||
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276 | ||||
| 229 | } |
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277 | } | |
| 230 |
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278 | |||
| 231 | if (!tooltip.isEmpty()) { |
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279 | if (!tooltip.isEmpty()) { | |
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