void SpeedPlotView::paintEvent(QPaintEvent *) { QPainter painter(this->viewport()); QRect full_rect = this->viewport()->rect(); QRect rect = this->viewport()->rect(); QFontMetrics font_metrics = painter.fontMetrics(); rect.adjust(4, 4, 0, -4); // Add padding double max_y = maxYValue(); rect.adjust(0, font_metrics.height(), 0, 0); // Add top padding for top speed text // draw Y axis speed labels QVector<QString> speed_labels(QVector<QString>() << Utils::Misc::friendlyUnit(max_y, true) << Utils::Misc::friendlyUnit(0.75 * max_y, true) << Utils::Misc::friendlyUnit(0.5 * max_y, true) << Utils::Misc::friendlyUnit(0.25 * max_y, true) << Utils::Misc::friendlyUnit(0, true)); int y_axe_width = 0; for (int i = 0; i < speed_labels.size(); ++i) { if (font_metrics.width(speed_labels[i]) > y_axe_width) y_axe_width = font_metrics.width(speed_labels[i]); } for (int i = 0; i < speed_labels.size(); ++i) { QRectF label_rect(rect.topLeft() + QPointF(-y_axe_width, i * 0.25 * rect.height() - font_metrics.height()), QSizeF(2 * y_axe_width, font_metrics.height())); painter.drawText(label_rect, speed_labels[i], QTextOption((Qt::AlignRight) | (Qt::AlignTop))); } // draw grid lines rect.adjust(y_axe_width + 4, 0, 0, 0); QPen grid_pen; grid_pen.setStyle(Qt::DashLine); grid_pen.setWidthF(1); grid_pen.setColor(QColor(128, 128, 128, 128)); painter.setPen(grid_pen); painter.drawLine(full_rect.left(), rect.top(), rect.right(), rect.top()); painter.drawLine(full_rect.left(), rect.top() + 0.25 * rect.height(), rect.right(), rect.top() + 0.25 * rect.height()); painter.drawLine(full_rect.left(), rect.top() + 0.50 * rect.height(), rect.right(), rect.top() + 0.50 * rect.height()); painter.drawLine(full_rect.left(), rect.top() + 0.75 * rect.height(), rect.right(), rect.top() + 0.75 * rect.height()); painter.drawLine(full_rect.left(), rect.bottom(), rect.right(), rect.bottom()); painter.drawLine(rect.left(), full_rect.top(), rect.left(), full_rect.bottom()); painter.drawLine(rect.left() + 0.2 * rect.width(), full_rect.top(), rect.left() + 0.2 * rect.width(), full_rect.bottom()); painter.drawLine(rect.left() + 0.4 * rect.width(), full_rect.top(), rect.left() + 0.4 * rect.width(), full_rect.bottom()); painter.drawLine(rect.left() + 0.6 * rect.width(), full_rect.top(), rect.left() + 0.6 * rect.width(), full_rect.bottom()); painter.drawLine(rect.left() + 0.8 * rect.width(), full_rect.top(), rect.left() + 0.8 * rect.width(), full_rect.bottom()); // Set antialiasing for graphs painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing); // draw graphs rect.adjust(3, 0, 0, 0); // Need, else graphs cross left gridline double y_multiplier = rect.height() / max_y; double x_tick_size = double(rect.width()) / m_viewablePointsCount; for (QMap<GraphID, QQueue<double> >::const_iterator it = m_yData.begin(); it != m_yData.end(); ++it) { if (!m_properties[it.key()].m_enable) continue; QQueue<double> &queue = m_yData[it.key()]; QVector<QPointF> points; for (int i = queue.size() - 1, j = 0; i >= 0 && j <= m_viewablePointsCount; --i, ++j) { points.push_back(QPointF(rect.right() - j * x_tick_size, rect.bottom() - queue.at(i) * y_multiplier)); } painter.setPen(m_properties[it.key()].m_pen); painter.drawPolyline(points.data(), points.size()); } // draw legend QPoint legend_top_left(rect.left() + 4, full_rect.top() + 4); double legend_height = 0; int legend_width = 0; for (QMap<GraphID, GraphProperties>::const_iterator it = m_properties.begin(); it != m_properties.end(); ++it) { if (!it.value().m_enable) continue; if (font_metrics.width(it.value().m_name) > legend_width) legend_width = font_metrics.width(it.value().m_name); legend_height += 1.5 * font_metrics.height(); } QRectF legend_background_rect(legend_top_left, QSizeF(legend_width, legend_height)); painter.fillRect(legend_background_rect, QColor(255, 255, 255, 128)); // 50% transparent int i = 0; for (QMap<GraphID, GraphProperties>::const_iterator it = m_properties.begin(); it != m_properties.end(); ++it) { if (!it.value().m_enable) continue; int name_size = font_metrics.width(it.value().m_name); double indent = 1.5 * i * font_metrics.height(); painter.setPen(it.value().m_pen); painter.drawLine(legend_top_left + QPointF(0, indent + font_metrics.height()), legend_top_left + QPointF(name_size, indent + font_metrics.height())); painter.drawText(QRectF(legend_top_left + QPointF(0, indent), QSizeF(2 * name_size, font_metrics.height())), it.value().m_name, QTextOption(Qt::AlignVCenter)); ++i; } }
void SpeedPlotView::paintEvent(QPaintEvent *) { QPainter painter(viewport()); QRect fullRect = viewport()->rect(); QRect rect = viewport()->rect(); QFontMetrics fontMetrics = painter.fontMetrics(); rect.adjust(4, 4, 0, -4); // Add padding int maxY = maxYValue(); rect.adjust(0, fontMetrics.height(), 0, 0); // Add top padding for top speed text // draw Y axis speed labels QVector<QString> speedLabels = { Utils::Misc::friendlyUnit(maxY, true), Utils::Misc::friendlyUnit(0.75 * maxY, true), Utils::Misc::friendlyUnit(0.5 * maxY, true), Utils::Misc::friendlyUnit(0.25 * maxY, true), Utils::Misc::friendlyUnit(0, true) }; int yAxeWidth = 0; for (const QString &label : speedLabels) if (fontMetrics.width(label) > yAxeWidth) yAxeWidth = fontMetrics.width(label); int i = 0; for (const QString &label : speedLabels) { QRectF labelRect(rect.topLeft() + QPointF(-yAxeWidth, (i++) * 0.25 * rect.height() - fontMetrics.height()), QSizeF(2 * yAxeWidth, fontMetrics.height())); painter.drawText(labelRect, label, Qt::AlignRight | Qt::AlignTop); } // draw grid lines rect.adjust(yAxeWidth + 4, 0, 0, 0); QPen gridPen; gridPen.setStyle(Qt::DashLine); gridPen.setWidthF(1); gridPen.setColor(QColor(128, 128, 128, 128)); painter.setPen(gridPen); painter.drawLine(fullRect.left(), rect.top(), rect.right(), rect.top()); painter.drawLine(fullRect.left(), rect.top() + 0.25 * rect.height(), rect.right(), rect.top() + 0.25 * rect.height()); painter.drawLine(fullRect.left(), rect.top() + 0.50 * rect.height(), rect.right(), rect.top() + 0.50 * rect.height()); painter.drawLine(fullRect.left(), rect.top() + 0.75 * rect.height(), rect.right(), rect.top() + 0.75 * rect.height()); painter.drawLine(fullRect.left(), rect.bottom(), rect.right(), rect.bottom()); painter.drawLine(rect.left(), fullRect.top(), rect.left(), fullRect.bottom()); painter.drawLine(rect.left() + 0.2 * rect.width(), fullRect.top(), rect.left() + 0.2 * rect.width(), fullRect.bottom()); painter.drawLine(rect.left() + 0.4 * rect.width(), fullRect.top(), rect.left() + 0.4 * rect.width(), fullRect.bottom()); painter.drawLine(rect.left() + 0.6 * rect.width(), fullRect.top(), rect.left() + 0.6 * rect.width(), fullRect.bottom()); painter.drawLine(rect.left() + 0.8 * rect.width(), fullRect.top(), rect.left() + 0.8 * rect.width(), fullRect.bottom()); // Set antialiasing for graphs painter.setRenderHints(QPainter::Antialiasing | QPainter::HighQualityAntialiasing); // draw graphs rect.adjust(3, 0, 0, 0); // Need, else graphs cross left gridline double yMultiplier = (maxY == 0) ? 0.0 : static_cast<double>(rect.height()) / maxY; double xTickSize = static_cast<double>(rect.width()) / m_viewablePointsCount; boost::circular_buffer<PointData> &queue = getCurrentData(); for (int id = UP; id < NB_GRAPHS; ++id) { if (!m_properties[static_cast<GraphID>(id)].enable) continue; QVector<QPoint> points; for (int i = int(queue.size()) - 1, j = 0; i >= 0 && j <= m_viewablePointsCount; --i, ++j) { int new_x = rect.right() - j * xTickSize; int new_y = rect.bottom() - queue[i].y[id] * yMultiplier; points.push_back(QPoint(new_x, new_y)); } painter.setPen(m_properties[static_cast<GraphID>(id)].pen); painter.drawPolyline(points.data(), points.size()); } // draw legend QPoint legendTopLeft(rect.left() + 4, fullRect.top() + 4); double legendHeight = 0; int legendWidth = 0; for (const auto &property : m_properties) { if (!property.enable) continue; if (fontMetrics.width(property.name) > legendWidth) legendWidth = fontMetrics.width(property.name); legendHeight += 1.5 * fontMetrics.height(); } QRectF legendBackgroundRect(QPoint(legendTopLeft.x() - 4, legendTopLeft.y() - 4), QSizeF(legendWidth + 8, legendHeight + 8)); QColor legendBackgroundColor = QWidget::palette().color(QWidget::backgroundRole()); legendBackgroundColor.setAlpha(128); // 50% transparent painter.fillRect(legendBackgroundRect, legendBackgroundColor); i = 0; for (const auto &property : m_properties) { if (!property.enable) continue; int nameSize = fontMetrics.width(property.name); double indent = 1.5 * (i++) * fontMetrics.height(); painter.setPen(property.pen); painter.drawLine(legendTopLeft + QPointF(0, indent + fontMetrics.height()), legendTopLeft + QPointF(nameSize, indent + fontMetrics.height())); painter.drawText(QRectF(legendTopLeft + QPointF(0, indent), QSizeF(2 * nameSize, fontMetrics.height())), property.name, QTextOption(Qt::AlignVCenter)); } }