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#include "Visualization/VisualizationGraphRenderingDelegate.h"
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#include "Visualization/AxisRenderingUtils.h"
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#include "Visualization/ColorScaleEditor.h"
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#include "Visualization/PlottablesRenderingUtils.h"
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#include "Visualization/SqpColorScale.h"
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#include "Visualization/VisualizationGraphWidget.h"
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#include "Visualization/qcustomplot.h"
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#include <Common/DateUtils.h>
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#include <SqpApplication.h>
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namespace
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{
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/// Name of the axes layer in QCustomPlot
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const auto AXES_LAYER = QStringLiteral("axes");
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/// Icon used to show x-axis properties
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const auto HIDE_AXIS_ICON_PATH = QStringLiteral(":/icones/down.png");
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/// Name of the overlay layer in QCustomPlot
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const auto OVERLAY_LAYER = QStringLiteral("overlay");
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/// Pixmap used to show x-axis properties
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const auto SHOW_AXIS_ICON_PATH = QStringLiteral(":/icones/up.png");
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/// Tooltip format for graphs
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const auto GRAPH_TOOLTIP_FORMAT = QStringLiteral("key: %1\nvalue: %2");
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/// Tooltip format for colormaps
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const auto COLORMAP_TOOLTIP_FORMAT = QStringLiteral("x: %1\ny: %2\nvalue: %3");
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/// Offset used to shift the tooltip of the mouse
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const auto TOOLTIP_OFFSET = QPoint { 20, 20 };
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/// Tooltip display rectangle (the tooltip is hidden when the mouse leaves this rectangle)
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const auto TOOLTIP_RECT = QRect { 10, 10, 10, 10 };
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/// Timeout after which the tooltip is displayed
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const auto TOOLTIP_TIMEOUT = 500;
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void initPointTracerStyle(QCPItemTracer& tracer) noexcept
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{
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tracer.setInterpolating(false);
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tracer.setStyle(QCPItemTracer::tsCircle);
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tracer.setSize(3);
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tracer.setPen(QPen(Qt::black));
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tracer.setBrush(Qt::black);
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tracer.setSelectable(false);
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}
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QPixmap pixmap(const QString& iconPath) noexcept
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{
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return QIcon { iconPath }.pixmap(QSize { 16, 16 });
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}
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void initClosePixmapStyle(QCPItemPixmap& pixmap) noexcept
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{
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// Icon
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pixmap.setPixmap(
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sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton).pixmap(QSize { 16, 16 }));
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// Position
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pixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
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pixmap.topLeft->setCoords(1, 0);
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pixmap.setClipToAxisRect(false);
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// Can be selected
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pixmap.setSelectable(true);
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}
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void initXAxisPixmapStyle(QCPItemPixmap& itemPixmap) noexcept
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{
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// Icon
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itemPixmap.setPixmap(pixmap(HIDE_AXIS_ICON_PATH));
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// Position
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itemPixmap.topLeft->setType(QCPItemPosition::ptAxisRectRatio);
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itemPixmap.topLeft->setCoords(0, 1);
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itemPixmap.setClipToAxisRect(false);
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// Can be selected
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itemPixmap.setSelectable(true);
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}
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void initTitleTextStyle(QCPItemText& text) noexcept
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{
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// Font and background styles
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text.setColor(Qt::gray);
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text.setBrush(Qt::white);
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// Position
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text.setPositionAlignment(Qt::AlignTop | Qt::AlignLeft);
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text.position->setType(QCPItemPosition::ptAxisRectRatio);
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text.position->setCoords(0.5, 0);
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text.setSelectable(false);
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}
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/**
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* Returns the cell index (x or y) of a colormap according to the coordinate passed in parameter.
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* This method handles the fact that a colormap axis can be logarithmic or linear.
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* @param colormap the colormap for which to calculate the index
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* @param coord the coord to convert to cell index
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* @param xCoord calculates the x index if true, calculates y index if false
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* @return the cell index
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*/
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int colorMapCellIndex(const QCPColorMap& colormap, double coord, bool xCoord)
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{
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// Determines the axis of the colormap according to xCoord, and whether it is logarithmic or not
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auto isLogarithmic = (xCoord ? colormap.keyAxis() : colormap.valueAxis())->scaleType()
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== QCPAxis::stLogarithmic;
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if (isLogarithmic)
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{
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// For a logarithmic axis we can't use the conversion method of colormap, so we calculate
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// the index manually based on the position of the coordinate on the axis
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// Gets the axis range and the number of values between range bounds to calculate the step
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// between each value of the range
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auto range = xCoord ? colormap.data()->keyRange() : colormap.data()->valueRange();
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auto nbValues = (xCoord ? colormap.data()->keySize() : colormap.data()->valueSize()) - 1;
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auto valueStep
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= (std::log10(range.upper) - std::log10(range.lower)) / static_cast<double>(nbValues);
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// According to the coord position, calculates the closest index in the range
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return std::round((std::log10(coord) - std::log10(range.lower)) / valueStep);
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}
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else
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{
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// For a linear axis, we use the conversion method of colormap
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int index;
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if (xCoord)
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{
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colormap.data()->coordToCell(coord, 0., &index, nullptr);
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}
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else
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{
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colormap.data()->coordToCell(0., coord, nullptr, &index);
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}
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return index;
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}
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}
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} // namespace
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struct VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegatePrivate
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{
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explicit VisualizationGraphRenderingDelegatePrivate(VisualizationGraphWidget& graphWidget)
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: m_Plot { graphWidget.plot() }
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, m_PointTracer { new QCPItemTracer { &m_Plot } }
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, m_TracerTimer {}
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, m_ClosePixmap { new QCPItemPixmap { &m_Plot } }
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, m_TitleText { new QCPItemText { &m_Plot } }
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, m_XAxisPixmap { new QCPItemPixmap { &m_Plot } }
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, m_ShowXAxis { true }
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, m_XAxisLabel {}
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, m_ColorScale { SqpColorScale { m_Plot } }
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{
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initPointTracerStyle(*m_PointTracer);
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m_TracerTimer.setInterval(TOOLTIP_TIMEOUT);
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m_TracerTimer.setSingleShot(true);
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// Inits "close button" in plot overlay
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m_ClosePixmap->setLayer(OVERLAY_LAYER);
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initClosePixmapStyle(*m_ClosePixmap);
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// Connects pixmap selection to graph widget closing
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QObject::connect(
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&m_Plot, &QCustomPlot::itemClick, [&graphWidget, this](auto item, auto mouseEvent) {
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if (item == m_ClosePixmap)
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{
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graphWidget.close();
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}
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});
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// Inits graph name in plot overlay
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m_TitleText->setLayer(OVERLAY_LAYER);
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m_TitleText->setText(graphWidget.name());
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initTitleTextStyle(*m_TitleText);
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// Inits "show x-axis button" in plot overlay
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m_XAxisPixmap->setLayer(OVERLAY_LAYER);
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initXAxisPixmapStyle(*m_XAxisPixmap);
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// Connects pixmap selection to graph x-axis showing/hiding
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QObject::connect(&m_Plot, &QCustomPlot::itemClick, [this](auto item, auto mouseEvent) {
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if (m_XAxisPixmap == item)
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{
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// Changes the selection state and refreshes the x-axis
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m_ShowXAxis = !m_ShowXAxis;
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this->updateXAxisState();
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m_Plot.layer(AXES_LAYER)->replot();
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// Deselects the x-axis pixmap and updates icon
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m_XAxisPixmap->setPixmap(
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pixmap(m_ShowXAxis ? HIDE_AXIS_ICON_PATH : SHOW_AXIS_ICON_PATH));
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m_Plot.layer(OVERLAY_LAYER)->replot();
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}
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});
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}
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/// Updates state of x-axis according to the current selection of x-axis pixmap
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/// @remarks the method doesn't call plot refresh
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void updateXAxisState() noexcept
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{
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m_Plot.xAxis->setTickLabels(m_ShowXAxis);
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m_Plot.xAxis->setLabel(m_ShowXAxis ? m_XAxisLabel : QString {});
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}
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QCustomPlot& m_Plot;
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QCPItemTracer* m_PointTracer;
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QTimer m_TracerTimer;
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QCPItemPixmap* m_ClosePixmap; /// Graph's close button
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QCPItemText* m_TitleText; /// Graph's title
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QCPItemPixmap* m_XAxisPixmap;
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bool m_ShowXAxis; /// X-axis properties are shown or hidden
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QString m_XAxisLabel;
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SqpColorScale m_ColorScale; /// Color scale used for some types of graphs (as spectrograms)
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};
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VisualizationGraphRenderingDelegate::VisualizationGraphRenderingDelegate(
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VisualizationGraphWidget& graphWidget)
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: impl { spimpl::make_unique_impl<VisualizationGraphRenderingDelegatePrivate>(graphWidget) }
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{
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}
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void VisualizationGraphRenderingDelegate::onMouseDoubleClick(QMouseEvent* event) noexcept
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{
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// Opens color scale editor if color scale is double clicked
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auto colorScale = static_cast<QCPColorScale*>(impl->m_Plot.layoutElementAt(event->pos()));
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if (impl->m_ColorScale.m_Scale == colorScale)
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{
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if (ColorScaleEditor { impl->m_ColorScale }.exec() == QDialog::Accepted)
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{
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impl->m_Plot.replot();
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}
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}
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}
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void VisualizationGraphRenderingDelegate::updateTooltip(QMouseEvent* event) noexcept
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{
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// Cancels pending refresh
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impl->m_TracerTimer.disconnect();
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// Reinits tracers
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impl->m_PointTracer->setGraph(nullptr);
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impl->m_PointTracer->setVisible(false);
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impl->m_Plot.replot();
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QString tooltip {};
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// Gets the graph under the mouse position
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auto eventPos = event->pos();
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if (auto graph = qobject_cast<QCPGraph*>(impl->m_Plot.plottableAt(eventPos)))
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{
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auto mouseKey = graph->keyAxis()->pixelToCoord(eventPos.x());
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auto graphData = graph->data();
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// Gets the closest data point to the mouse
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auto graphDataIt = graphData->findBegin(mouseKey);
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if (graphDataIt != graphData->constEnd())
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{
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// Sets tooltip
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auto key = formatValue(graphDataIt->key, *graph->keyAxis());
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auto value = formatValue(graphDataIt->value, *graph->valueAxis());
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tooltip = GRAPH_TOOLTIP_FORMAT.arg(key, value);
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// Displays point tracer
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impl->m_PointTracer->setGraph(graph);
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impl->m_PointTracer->setGraphKey(graphDataIt->key);
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impl->m_PointTracer->setLayer(
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impl->m_Plot.layer("main")); // Tracer is set on top of the plot's main layer
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impl->m_PointTracer->setVisible(true);
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impl->m_Plot.replot();
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}
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}
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else if (auto colorMap = qobject_cast<QCPColorMap*>(impl->m_Plot.plottableAt(eventPos)))
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{
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// Gets x and y coords
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auto x = colorMap->keyAxis()->pixelToCoord(eventPos.x());
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auto y = colorMap->valueAxis()->pixelToCoord(eventPos.y());
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// Calculates x and y cell indexes, and retrieves the underlying value
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auto xCellIndex = colorMapCellIndex(*colorMap, x, true);
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auto yCellIndex = colorMapCellIndex(*colorMap, y, false);
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auto value = colorMap->data()->cell(xCellIndex, yCellIndex);
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// Sets tooltips
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tooltip = COLORMAP_TOOLTIP_FORMAT.arg(formatValue(x, *colorMap->keyAxis()),
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formatValue(y, *colorMap->valueAxis()),
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formatValue(value, *colorMap->colorScale()->axis()));
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}
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if (!tooltip.isEmpty())
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{
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// Starts timer to show tooltip after timeout
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auto showTooltip = [tooltip, eventPos, this]() {
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QToolTip::showText(impl->m_Plot.mapToGlobal(eventPos) + TOOLTIP_OFFSET, tooltip,
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&impl->m_Plot, TOOLTIP_RECT);
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};
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QObject::connect(&impl->m_TracerTimer, &QTimer::timeout, showTooltip);
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impl->m_TracerTimer.start();
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}
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}
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void VisualizationGraphRenderingDelegate::onPlotUpdated() noexcept
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{
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// Updates color scale bounds
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impl->m_ColorScale.updateDataRange();
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impl->m_Plot.replot();
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}
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void VisualizationGraphRenderingDelegate::setAxesUnits(Variable2& variable) noexcept
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{
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auto axisHelper = IAxisHelperFactory::create(variable);
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axisHelper->setUnits(impl->m_Plot, impl->m_ColorScale);
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// Stores x-axis label to be able to retrieve it when x-axis pixmap is unselected
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impl->m_XAxisLabel = impl->m_Plot.xAxis->label();
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// Updates x-axis state
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impl->updateXAxisState();
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impl->m_Plot.layer(AXES_LAYER)->replot();
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}
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void VisualizationGraphRenderingDelegate::setGraphProperties(
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Variable2& variable, PlottablesMap& plottables) noexcept
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{
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// Axes' properties
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auto axisHelper = IAxisHelperFactory::create(variable);
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axisHelper->setProperties(impl->m_Plot, impl->m_ColorScale);
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// Plottables' properties
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auto plottablesHelper = IPlottablesHelperFactory::create(variable);
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plottablesHelper->setProperties(plottables);
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}
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void VisualizationGraphRenderingDelegate::showGraphOverlay(bool show) noexcept
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{
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auto overlay = impl->m_Plot.layer(OVERLAY_LAYER);
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overlay->setVisible(show);
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overlay->replot();
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}
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