Grid() { enableXMin( true ); setMajorPen( Qt::white, 0, Qt::DotLine ); setMinorPen( Qt::gray, 0, Qt::DotLine ); }
void PlotItem::paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget*) { const auto& rect = option->rect; #else void PlotItem::paint (QPainter *painter) { const auto& rect = contentsBoundingRect ().toRect (); #endif QwtPlot plot; plot.setFrameShape (QFrame::NoFrame); plot.enableAxis (QwtPlot::yLeft, LeftAxisEnabled_); plot.enableAxis (QwtPlot::xBottom, BottomAxisEnabled_); plot.setAxisTitle (QwtPlot::yLeft, LeftAxisTitle_); plot.setAxisTitle (QwtPlot::xBottom, BottomAxisTitle_); plot.resize (rect.size ()); auto setPaletteColor = [&plot] (const QColor& color, QPalette::ColorRole role) -> void { if (!color.isValid ()) return; auto pal = plot.palette (); pal.setColor (role, { color }); plot.setPalette (pal); }; setPaletteColor (BackgroundColor_, QPalette::Window); setPaletteColor (TextColor_, QPalette::WindowText); setPaletteColor (TextColor_, QPalette::Text); if (!PlotTitle_.isEmpty ()) plot.setTitle (QwtText { PlotTitle_ }); if (MinYValue_ < MaxYValue_) { plot.setAxisAutoScale (QwtPlot::yLeft, false); plot.setAxisScale (QwtPlot::yLeft, MinYValue_, MaxYValue_); } plot.setAutoFillBackground (false); plot.setCanvasBackground (Qt::transparent); if (YGridEnabled_) { auto grid = new QwtPlotGrid; grid->enableYMin (YMinorGridEnabled_); grid->enableX (false); #if QWT_VERSION >= 0x060100 grid->setMajorPen (QPen (GridLinesColor_, 1, Qt::SolidLine)); grid->setMinorPen (QPen (GridLinesColor_, 1, Qt::DashLine)); #else grid->setMajPen (QPen (GridLinesColor_, 1, Qt::SolidLine)); grid->setMinPen (QPen (GridLinesColor_, 1, Qt::DashLine)); #endif grid->attach (&plot); } auto items = Multipoints_; if (items.isEmpty ()) items.push_back ({ Color_, Points_ }); if (MinXValue_ < MaxXValue_) plot.setAxisScale (QwtPlot::xBottom, MinXValue_, MaxXValue_); else if (const auto ptsCount = items.first ().Points_.size ()) plot.setAxisScale (QwtPlot::xBottom, 0, ptsCount - 1); std::vector<std::unique_ptr<QwtPlotCurve>> curves; for (const auto& item : items) { curves.emplace_back (new QwtPlotCurve); const auto curve = curves.back ().get (); curve->setPen (QPen (item.Color_)); auto transpColor = item.Color_; transpColor.setAlphaF (Alpha_); curve->setBrush (transpColor); curve->setRenderHint (QwtPlotItem::RenderAntialiased); curve->attach (&plot); curve->setSamples (item.Points_.toVector ()); } plot.replot (); QwtPlotRenderer {}.render (&plot, painter, rect); const auto xExtent = CalcXExtent (plot); const auto yExtent = CalcYExtent (plot); if (xExtent != XExtent_ || yExtent != YExtent_) { XExtent_ = xExtent; YExtent_ = yExtent; emit extentsChanged (); } }