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Telegram/SourceFiles/ui/controls/swipe_handler.h

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+/*
+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
+
+namespace Ui {
+class ElasticScroll;
+class RpWidget;
+class ScrollArea;
+} // namespace Ui
+
+namespace Ui::Controls {
+
+struct SwipeContextData;
+struct SwipeBackResult;
+
+struct SwipeHandlerFinishData {
+	Fn<void(void)> callback;
+	int64 msgBareId = 0;
+	float64 speedRatio = 1.0;
+	crl::time reachRatioDuration = 0;
+	bool keepRatioWithinRange = false;
+	bool provideReachOutRatio = false;
+};
+
+using Scroll = std::variant<
+	v::null_t,
+	not_null<Ui::ScrollArea*>,
+	not_null<Ui::ElasticScroll*>>;
+
+struct SwipeHandlerArgs {
+	not_null<Ui::RpWidget*> widget;
+	Scroll scroll;
+	Fn<void(SwipeContextData)> update;
+	Fn<SwipeHandlerFinishData(int, Qt::LayoutDirection)> init;
+	rpl::producer<bool> dontStart = nullptr;
+	rpl::lifetime *onLifetime = nullptr;
+};
+
+void SetupSwipeHandler(SwipeHandlerArgs &&args);
+
+[[nodiscard]] SwipeBackResult SetupSwipeBack(
+	not_null<Ui::RpWidget*> widget,
+	Fn<std::pair<QColor, QColor>()> colors,
+	bool mirrored = false,
+	bool iconMirrored = false);
+
+[[nodiscard]] SwipeHandlerFinishData DefaultSwipeBackHandlerFinishData(
+	Fn<void(void)> callback);
+
+} // namespace Ui::Controls