Added dummy class for stack chart view.

Telegram/CMakeLists.txt

@@ -1300,6 +1300,8 @@ PRIVATE
     statistics/view/chart_view_factory.h
     statistics/view/linear_chart_view.cpp
     statistics/view/linear_chart_view.h
+    statistics/view/stack_chart_view.cpp
+    statistics/view/stack_chart_view.h
     storage/details/storage_file_utilities.cpp
     storage/details/storage_file_utilities.h
     storage/details/storage_settings_scheme.cpp

Telegram/SourceFiles/statistics/statistics_common.h

@@ -16,6 +16,7 @@ struct Limits final {
 
 enum class ChartViewType {
 	Linear,
+	Stack,
 };
 
 } // namespace Statistic

Telegram/SourceFiles/statistics/view/chart_view_factory.cpp

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "statistics/statistics_common.h"
 #include "statistics/view/linear_chart_view.h"
+#include "statistics/view/stack_chart_view.h"
 
 namespace Statistic {
 
@@ -17,6 +18,9 @@ std::unique_ptr<AbstractChartView> CreateChartView(ChartViewType type) {
 	case ChartViewType::Linear: {
 		return std::make_unique<LinearChartView>();
 	} break;
+	case ChartViewType::Stack: {
+		return std::make_unique<StackChartView>();
+	} break;
 	default: Unexpected("Type in Statistic::CreateChartView.");
 	}
 }

Telegram/SourceFiles/statistics/view/stack_chart_view.cpp

@@ -0,0 +1,61 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "statistics/view/stack_chart_view.h"
+
+namespace Statistic {
+namespace {
+} // namespace
+
+StackChartView::StackChartView() = default;
+
+StackChartView::~StackChartView() = default;
+
+void StackChartView::paint(
+		QPainter &p,
+		const Data::StatisticalChart &chartData,
+		const Limits &xIndices,
+		const Limits &xPercentageLimits,
+		const Limits &heightLimits,
+		const QRect &rect,
+		bool footer) {
+}
+
+void StackChartView::paintSelectedXIndex(
+		QPainter &p,
+		const Data::StatisticalChart &chartData,
+		const Limits &xPercentageLimits,
+		const Limits &heightLimits,
+		const QRect &rect,
+		int selectedXIndex) {
+}
+
+void StackChartView::setEnabled(int id, bool enabled, crl::time now) {
+}
+
+bool StackChartView::isFinished() const {
+	return true;
+}
+
+bool StackChartView::isEnabled(int id) const {
+	return true;
+}
+
+float64 StackChartView::alpha(int id) const {
+	return 1.0;
+}
+
+AbstractChartView::HeightLimits StackChartView::heightLimits(
+		Data::StatisticalChart &chartData,
+		Limits xIndices) {
+	return {};
+}
+
+void StackChartView::tick(crl::time now) {
+}
+
+} // namespace Statistic

Telegram/SourceFiles/statistics/view/stack_chart_view.h

@@ -0,0 +1,56 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "statistics/statistics_common.h"
+#include "statistics/view/abstract_chart_view.h"
+
+namespace Data {
+struct StatisticalChart;
+} // namespace Data
+
+namespace Statistic {
+
+struct Limits;
+
+class StackChartView final : public AbstractChartView {
+public:
+	StackChartView();
+	~StackChartView() override final;
+
+	void paint(
+		QPainter &p,
+		const Data::StatisticalChart &chartData,
+		const Limits &xIndices,
+		const Limits &xPercentageLimits,
+		const Limits &heightLimits,
+		const QRect &rect,
+		bool footer) override;
+
+	void paintSelectedXIndex(
+		QPainter &p,
+		const Data::StatisticalChart &chartData,
+		const Limits &xPercentageLimits,
+		const Limits &heightLimits,
+		const QRect &rect,
+		int selectedXIndex) override;
+
+	void setEnabled(int id, bool enabled, crl::time now) override;
+	[[nodiscard]] bool isEnabled(int id) const override;
+	[[nodiscard]] bool isFinished() const override;
+	[[nodiscard]] float64 alpha(int id) const override;
+
+	[[nodiscard]] HeightLimits heightLimits(
+		Data::StatisticalChart &chartData,
+		Limits xIndices) override;
+
+	void tick(crl::time now) override;
+
+};
+
+} // namespace Statistic