Cached both main and footer charts in single linear chart view.

Telegram/SourceFiles/statistics/chart_widget.cpp

@@ -822,7 +822,7 @@ ChartWidget::ChartWidget(not_null<Ui::RpWidget*> parent)
 , _animationController([=] {
 	_chartArea->update();
 	if (_animationController.footerAnimating()
-		|| !_linearChartView.main->isFinished()) {
+		|| !_linearChartView->isFinished()) {
 		_footer->update();
 	}
 }) {
@@ -900,7 +900,7 @@ void ChartWidget::setupChartArea() {
 			now,
 			_horizontalLines,
 			_bottomLine.dates,
-			_linearChartView.main);
+			_linearChartView);
 
 		const auto chartRect = chartAreaRect();
 
@@ -934,7 +934,7 @@ void ChartWidget::setupChartArea() {
 				for (const auto &line : _chartData.lines) {
 					_details.widget->setLineAlpha(
 						line.id,
-						_linearChartView.main->alpha(line.id));
+						_linearChartView->alpha(line.id));
 				}
 			}
 		}
@@ -949,15 +949,15 @@ void ChartWidget::setupChartArea() {
 			// 	QPainter::Antialiasing,
 			// 	!_animationController.isFPSSlow()
 			// 		|| !_animationController.animating());
-			PainterHighQualityEnabler hp(p);
-			_linearChartView.main->paint(
+			_linearChartView->paint(
 				p,
 				_chartData,
 				_animationController.currentXIndices(),
 				_animationController.currentXLimits(),
 				_animationController.currentHeightLimits(),
 				chartRect,
-				detailsPaintContext);
+				detailsPaintContext,
+				false);
 		}
 
 		for (auto &horizontalLine : _horizontalLines) {
@@ -1074,14 +1074,15 @@ void ChartWidget::setupFooter() {
 			// 	!_animationController.isFPSSlow()
 			// 		|| !_animationController.animating());
 			PainterHighQualityEnabler hp(p);
-			_linearChartView.footer->paint(
+			_linearChartView->paint(
 				p,
 				_chartData,
 				{ 0., float64(_chartData.x.size() - 1) },
 				fullXLimits,
 				_animationController.currentFooterHeightLimits(),
 				r,
-				detailsPaintContext);
+				detailsPaintContext,
+				true);
 		}
 	});
 
@@ -1097,7 +1098,7 @@ void ChartWidget::setupFooter() {
 		_animationController.setXPercentageLimits(
 			_chartData,
 			xPercentageLimits,
-			_linearChartView.main,
+			_linearChartView,
 			now);
 		updateChartFullWidth(_chartArea->width());
 		updateBottomDates();
@@ -1215,12 +1216,12 @@ void ChartWidget::setupFilterButtons() {
 	_filterButtons->buttonEnabledChanges(
 	) | rpl::start_with_next([=](const ChartLinesFilterWidget::Entry &e) {
 		const auto now = crl::now();
-		_linearChartView.main->setEnabled(e.id, e.enabled, now);
+		_linearChartView->setEnabled(e.id, e.enabled, now);
 
 		_animationController.setXPercentageLimits(
 			_chartData,
 			_animationController.currentXLimits(),
-			_linearChartView.main,
+			_linearChartView,
 			now);
 	}, _filterButtons->lifetime());
 }
@@ -1228,8 +1229,7 @@ void ChartWidget::setupFilterButtons() {
 void ChartWidget::setChartData(Data::StatisticalChart chartData) {
 	_chartData = std::move(chartData);
 
-	_linearChartView.main = std::make_unique<LinearChartView>();
-	_linearChartView.footer = std::make_unique<LinearChartView>();
+	_linearChartView = std::make_unique<LinearChartView>();
 
 	setupDetails();
 	setupFilterButtons();
@@ -1237,7 +1237,7 @@ void ChartWidget::setChartData(Data::StatisticalChart chartData) {
 	_animationController.setXPercentageLimits(
 		_chartData,
 		{ _chartData.xPercentage.front(), _chartData.xPercentage.back() },
-		_linearChartView.main,
+		_linearChartView,
 		0);
 	updateChartFullWidth(_chartArea->width());
 	updateBottomDates();

Telegram/SourceFiles/statistics/chart_widget.h

@@ -131,10 +131,7 @@ private:
 	base::unique_qptr<ChartLinesFilterWidget> _filterButtons;
 	Data::StatisticalChart _chartData;
 
-	struct {
-		std::unique_ptr<LinearChartView> main;
-		std::unique_ptr<LinearChartView> footer;
-	} _linearChartView;
+	std::unique_ptr<LinearChartView> _linearChartView;
 
 	struct {
 		base::unique_qptr<PointDetailsWidget> widget;

Telegram/SourceFiles/statistics/linear_chart_view.cpp

@@ -64,7 +64,8 @@ void LinearChartView::paint(
 		const Limits &xPercentageLimits,
 		const Limits &heightLimits,
 		const QRect &rect,
-		DetailsPaintContext &detailsPaintContext) {
+		DetailsPaintContext &detailsPaintContext,
+		bool footer) {
 
 	const auto cacheToken = LinearChartView::CacheToken(
 		xIndices,
@@ -72,42 +73,38 @@ void LinearChartView::paint(
 		heightLimits,
 		rect.size());
 
+	const auto imageSize = rect.size() * style::DevicePixelRatio();
+	const auto cacheScale = 1. / style::DevicePixelRatio();
+	auto &caches = (footer ? _footerCaches : _mainCaches);
+
 	for (auto i = 0; i < chartData.lines.size(); i++) {
 		const auto &line = chartData.lines[i];
 		p.setOpacity(alpha(line.id));
 		if (!p.opacity()) {
 			continue;
 		}
-		if (p.opacity() < 1.) {
-			// p.setRenderHint(QPainter::Antialiasing, false);
-		}
 
-		////
-		auto &cache = _caches[line.id];
+		auto &cache = caches[line.id];
 
 		const auto isSameToken = (cache.lastToken == cacheToken);
-		if (isSameToken && cache.hq) {
+		if ((isSameToken && cache.hq)
+			|| (p.opacity() < 1. && !isEnabled(line.id))) {
 			p.drawImage(rect.topLeft(), cache.image);
 			continue;
 		}
-		const auto ratio = style::DevicePixelRatio();
 		cache.hq = isSameToken;
 		auto image = QImage();
 		image = QImage(
-			rect.size() * style::DevicePixelRatio() * (isSameToken ? 1. : ratio),
+			imageSize * (isSameToken ? 1. : cacheScale),
 			QImage::Format_ARGB32_Premultiplied);
 		image.setDevicePixelRatio(style::DevicePixelRatio());
 		image.fill(Qt::transparent);
-		// image.fill(Qt::darkRed);
 		{
 			auto imagePainter = QPainter(&image);
-			imagePainter.setRenderHint(QPainter::Antialiasing, true);
-			if (isSameToken) {
-				// PainterHighQualityEnabler hp(imagePainter);
-			} else {
-				imagePainter.scale(ratio, ratio);
+			auto hq = PainterHighQualityEnabler(imagePainter);
+			if (!isSameToken) {
+				imagePainter.scale(cacheScale, cacheScale);
 			}
-			////
 
 			PaintChartLine(
 				imagePainter,
@@ -120,7 +117,10 @@ void LinearChartView::paint(
 		}
 
 		if (!isSameToken) {
-			image = image.scaled(rect.size() * style::DevicePixelRatio(), Qt::IgnoreAspectRatio, Qt::FastTransformation);
+			image = image.scaled(
+				imageSize,
+				Qt::IgnoreAspectRatio,
+				Qt::FastTransformation);
 		}
 		p.drawImage(rect.topLeft(), image);
 		cache.lastToken = cacheToken;

Telegram/SourceFiles/statistics/linear_chart_view.h

@@ -29,7 +29,8 @@ public:
 		const Limits &xPercentageLimits,
 		const Limits &heightLimits,
 		const QRect &rect,
-		DetailsPaintContext &detailsPaintContext);
+		DetailsPaintContext &detailsPaintContext,
+		bool footer);
 
 	void setEnabled(int id, bool enabled, crl::time now);
 	[[nodiscard]] bool isEnabled(int id) const;
@@ -78,7 +79,8 @@ private:
 		bool hq = false;
 	};
 
-	base::flat_map<int, Cache> _caches;
+	base::flat_map<int, Cache> _mainCaches;
+	base::flat_map<int, Cache> _footerCaches;
 
 	struct Entry final {
 		bool enabled = false;