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#include <Common/DateUtils.h>
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#include <Visualization/VisualizationCursorItem.h>
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#include <Visualization/qcustomplot.h>
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/// Width of the cursor in pixel
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const auto CURSOR_WIDTH = 3;
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/// Color of the cursor in the graph
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const auto CURSOR_COLOR = QColor{68, 114, 196};
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/// Line style of the cursor in the graph
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auto CURSOR_PEN_STYLE = Qt::DotLine;
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struct VisualizationCursorItem::VisualizationCursorItemPrivate {
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QCustomPlot *m_Plot = nullptr;
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QCPItemStraightLine *m_LineItem = nullptr;
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QCPItemText *m_LabelItem = nullptr;
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Qt::Orientation m_Orientation;
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double m_Position = 0.0;
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bool m_IsAbsolutePosition = false;
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QString m_LabelText;
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explicit VisualizationCursorItemPrivate(QCustomPlot *plot)
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: m_Plot(plot), m_Orientation(Qt::Vertical)
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{
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}
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void updateOrientation()
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{
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if (m_LineItem) {
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switch (m_Orientation) {
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case Qt::Vertical:
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m_LineItem->point1->setTypeX(m_IsAbsolutePosition
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? QCPItemPosition::ptAbsolute
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: QCPItemPosition::ptPlotCoords);
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m_LineItem->point1->setTypeY(QCPItemPosition::ptAxisRectRatio);
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m_LineItem->point2->setTypeX(m_IsAbsolutePosition
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? QCPItemPosition::ptAbsolute
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: QCPItemPosition::ptPlotCoords);
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m_LineItem->point2->setTypeY(QCPItemPosition::ptAxisRectRatio);
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m_LabelItem->setPositionAlignment(Qt::AlignLeft | Qt::AlignTop);
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break;
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case Qt::Horizontal:
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m_LineItem->point1->setTypeX(QCPItemPosition::ptAxisRectRatio);
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m_LineItem->point1->setTypeY(m_IsAbsolutePosition
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? QCPItemPosition::ptAbsolute
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: QCPItemPosition::ptPlotCoords);
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m_LineItem->point2->setTypeX(QCPItemPosition::ptAxisRectRatio);
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m_LineItem->point2->setTypeY(m_IsAbsolutePosition
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? QCPItemPosition::ptAbsolute
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: QCPItemPosition::ptPlotCoords);
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m_LabelItem->setPositionAlignment(Qt::AlignRight | Qt::AlignBottom);
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}
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}
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}
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void updateCursorPosition()
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{
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if (m_LineItem) {
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switch (m_Orientation) {
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case Qt::Vertical:
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m_LineItem->point1->setCoords(m_Position, 0);
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m_LineItem->point2->setCoords(m_Position, 1);
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m_LabelItem->position->setCoords(5, 5);
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break;
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case Qt::Horizontal:
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m_LineItem->point1->setCoords(1, m_Position);
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m_LineItem->point2->setCoords(0, m_Position);
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m_LabelItem->position->setCoords(-5, -5);
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}
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}
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}
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void updateLabelText()
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{
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if (m_LabelItem) {
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m_LabelItem->setText(m_LabelText);
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}
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}
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};
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VisualizationCursorItem::VisualizationCursorItem(QCustomPlot *plot)
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: impl{spimpl::make_unique_impl<VisualizationCursorItemPrivate>(plot)}
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{
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}
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void VisualizationCursorItem::setVisible(bool value)
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{
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if (value != isVisible()) {
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if (value) {
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Q_ASSERT(!impl->m_LineItem && !impl->m_LabelItem);
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impl->m_LineItem = new QCPItemStraightLine{impl->m_Plot};
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auto pen = QPen{CURSOR_PEN_STYLE};
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pen.setColor(CURSOR_COLOR);
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pen.setWidth(CURSOR_WIDTH);
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impl->m_LineItem->setPen(pen);
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impl->m_LineItem->setSelectable(false);
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impl->m_LabelItem = new QCPItemText{impl->m_Plot};
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impl->m_LabelItem->setColor(CURSOR_COLOR);
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impl->m_LabelItem->setSelectable(false);
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impl->m_LabelItem->position->setParentAnchor(impl->m_LineItem->point1);
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impl->m_LabelItem->position->setTypeX(QCPItemPosition::ptAbsolute);
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impl->m_LabelItem->position->setTypeY(QCPItemPosition::ptAbsolute);
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auto font = impl->m_LabelItem->font();
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font.setPointSize(10);
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font.setBold(true);
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impl->m_LabelItem->setFont(font);
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impl->updateOrientation();
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impl->updateLabelText();
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impl->updateCursorPosition();
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}
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else {
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Q_ASSERT(impl->m_LineItem && impl->m_LabelItem);
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// Note: the items are destroyed by QCustomPlot in removeItem
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impl->m_Plot->removeItem(impl->m_LineItem);
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impl->m_LineItem = nullptr;
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impl->m_Plot->removeItem(impl->m_LabelItem);
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impl->m_LabelItem = nullptr;
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}
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}
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}
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bool VisualizationCursorItem::isVisible() const
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{
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return impl->m_LineItem != nullptr;
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}
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void VisualizationCursorItem::setPosition(double value)
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{
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impl->m_Position = value;
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impl->m_IsAbsolutePosition = false;
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impl->updateLabelText();
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impl->updateCursorPosition();
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}
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void VisualizationCursorItem::setAbsolutePosition(double value)
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{
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setPosition(value);
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impl->m_IsAbsolutePosition = true;
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}
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void VisualizationCursorItem::setOrientation(Qt::Orientation orientation)
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{
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impl->m_Orientation = orientation;
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impl->updateLabelText();
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impl->updateOrientation();
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impl->updateCursorPosition();
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}
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void VisualizationCursorItem::setLabelText(const QString &text)
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{
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impl->m_LabelText = text;
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impl->updateLabelText();
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}
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