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Telegram/SourceFiles/dialogs/ui/top_peers_strip.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
+
+#include "base/weak_ptr.h"
+#include "ui/effects/animations.h"
+#include "ui/widgets/menu/menu_add_action_callback.h"
+#include "ui/round_rect.h"
+#include "ui/rp_widget.h"
+
+namespace Ui {
+class DynamicImage;
+class LinkButton;
+struct ScrollToRequest;
+} // namespace Ui
+
+namespace Dialogs {
+
+struct TopPeersEntry {
+	uint64 id = 0;
+	QString name;
+	std::shared_ptr<Ui::DynamicImage> userpic;
+	uint32 badge : 28 = 0;
+	uint32 unread : 1 = 0;
+	uint32 muted : 1 = 0;
+	uint32 online : 1 = 0;
+};
+
+struct TopPeersList {
+	std::vector<TopPeersEntry> entries;
+};
+
+struct ShowTopPeerMenuRequest {
+	uint64 id = 0;
+	Ui::Menu::MenuCallback callback;
+};
+
+class TopPeersStrip final : public Ui::RpWidget {
+public:
+	TopPeersStrip(
+		not_null<QWidget*> parent,
+		rpl::producer<TopPeersList> content);
+	~TopPeersStrip();
+
+	[[nodiscard]] bool empty() const;
+	[[nodiscard]] rpl::producer<bool> emptyValue() const;
+	[[nodiscard]] rpl::producer<uint64> clicks() const;
+	[[nodiscard]] rpl::producer<uint64> pressed() const;
+	[[nodiscard]] rpl::producer<> pressCancelled() const;
+	[[nodiscard]] auto showMenuRequests() const
+		-> rpl::producer<ShowTopPeerMenuRequest>;
+	[[nodiscard]] auto scrollToRequests() const
+		-> rpl::producer<Ui::ScrollToRequest>;
+
+	void removeLocally(uint64 id = 0);
+
+	[[nodiscard]] bool selectedByKeyboard() const;
+	bool selectByKeyboard(Qt::Key direction);
+	void deselectByKeyboard();
+	bool chooseRow();
+	void pressLeftToContextMenu(bool shown);
+
+	uint64 updateFromParentDrag(QPoint globalPosition);
+	void dragLeft();
+
+	[[nodiscard]] auto verticalScrollEvents() const
+		-> rpl::producer<not_null<QWheelEvent*>>;
+
+private:
+	struct Entry;
+	struct Layout;
+
+	int resizeGetHeight(int newWidth) override;
+
+	void setupHeader();
+	void setupStrip();
+
+	void paintStrip(QRect clip);
+	void stripWheelEvent(QWheelEvent *e);
+	void stripMousePressEvent(QMouseEvent *e);
+	void stripMouseMoveEvent(QMouseEvent *e);
+	void stripMouseReleaseEvent(QMouseEvent *e);
+	void stripContextMenuEvent(QContextMenuEvent *e);
+	void stripLeaveEvent(QEvent *e);
+
+	void updateScrollMax(int newWidth = 0);
+	void updateSelected();
+	void setSelected(int selected);
+	void setExpanded(bool expanded);
+	void scrollToSelected();
+	void checkDragging();
+	bool finishDragging();
+	void subscribeUserpic(Entry &entry);
+	void unsubscribeUserpics(bool all = false);
+	void paintUserpic(Painter &p, int x, int y, int index, bool selected);
+	void clearSelection();
+	void selectByMouse(QPoint globalPosition);
+
+	[[nodiscard]] QRect outer() const;
+	[[nodiscard]] QRect innerRounded() const;
+	[[nodiscard]] int scrollLeft() const;
+	[[nodiscard]] Layout currentLayout() const;
+	int clearPressed();
+	void apply(const TopPeersList &list);
+	void apply(Entry &entry, const TopPeersEntry &data);
+
+	Ui::RpWidget _header;
+	Ui::RpWidget _strip;
+
+	std::vector<Entry> _entries;
+	rpl::variable<int> _count = 0;
+	base::flat_set<uint64> _removed;
+	rpl::variable<Ui::LinkButton*> _toggleExpanded = nullptr;
+
+	rpl::event_stream<uint64> _clicks;
+	rpl::event_stream<uint64> _presses;
+	rpl::event_stream<> _pressCancelled;
+	rpl::event_stream<ShowTopPeerMenuRequest> _showMenuRequests;
+	rpl::event_stream<not_null<QWheelEvent*>> _verticalScrollEvents;
+
+	std::optional<QPoint> _lastMousePosition;
+	std::optional<QPoint> _mouseDownPosition;
+	int _startDraggingLeft = 0;
+	int _scrollLeft = 0;
+	int _scrollLeftMax = 0;
+	bool _dragging = false;
+	Qt::Orientation _scrollingLock = {};
+
+	int _selected = -1;
+	int _pressed = -1;
+	int _contexted = -1;
+	bool _selectionByKeyboard = false;
+	bool _hiddenLocally = false;
+
+	Ui::Animations::Simple _expandAnimation;
+	rpl::variable<bool> _expanded = false;
+
+	rpl::event_stream<Ui::ScrollToRequest> _scrollToRequests;
+
+	Ui::RoundRect _selection;
+	base::unique_qptr<Ui::PopupMenu> _menu;
+	base::has_weak_ptr _menuGuard;
+
+};
+
+} // namespace Dialogs