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Telegram/SourceFiles/ui/controls/subsection_tabs_slider.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 "dialogs/dialogs_common.h"
+#include "ui/round_rect.h"
+#include "ui/rp_widget.h"
+#include "ui/widgets/buttons.h"
+
+namespace style {
+struct ChatTabsVertical;
+struct ChatTabsOutline;
+} // namespace style
+
+namespace Ui {
+
+class DynamicImage;
+class RippleAnimation;
+class SubsectionButton;
+struct ScrollToRequest;
+
+struct SubsectionTab {
+	TextWithEntities text;
+	std::shared_ptr<DynamicImage> userpic;
+	Dialogs::BadgesState badges;
+};
+
+struct SubsectionTabs {
+	std::vector<SubsectionTab> tabs;
+	Text::MarkedContext context;
+	int fixed = 0;
+	int pinned = 0;
+	bool reorder = false;
+};
+
+class SubsectionButtonDelegate {
+public:
+	virtual bool buttonPaused() = 0;
+	virtual float64 buttonActive(not_null<SubsectionButton*> button) = 0;
+	virtual Text::MarkedContext buttonContext() = 0;
+	virtual void buttonContextMenu(
+		not_null<SubsectionButton*> button,
+		not_null<QContextMenuEvent*> e) = 0;
+};
+
+class SubsectionButton : public RippleButton {
+public:
+	SubsectionButton(
+		not_null<QWidget*> parent,
+		not_null<SubsectionButtonDelegate*> delegate,
+		SubsectionTab &&data);
+	~SubsectionButton();
+
+	void setData(SubsectionTab &&data);
+	[[nodiscard]] DynamicImage *userpic() const;
+
+	void setActiveShown(float64 activeShown);
+	void setIsPinned(bool pinned);
+	[[nodiscard]] bool isPinned() const;
+	void setPinnedPosition(bool isFirst, bool isLast);
+	[[nodiscard]] bool isFirstPinned() const;
+	[[nodiscard]] bool isLastPinned() const;
+	virtual void setBackgroundMargin(int margin);
+	void setShift(int shift);
+
+protected:
+	virtual void dataUpdatedHook() = 0;
+	virtual void invalidateCache() = 0;
+
+	void contextMenuEvent(QContextMenuEvent *e) override;
+
+	const not_null<SubsectionButtonDelegate*> _delegate;
+	SubsectionTab _data;
+	float64 _activeShown = 0.;
+	bool _isPinned = false;
+	bool _isFirstPinned = false;
+	bool _isLastPinned = false;
+	int _backgroundMargin = 0;
+	int _shift = 0;
+
+};
+
+class SubsectionSlider
+	: public RpWidget
+	, public SubsectionButtonDelegate {
+public:
+	~SubsectionSlider();
+
+	void setSections(
+		SubsectionTabs sections,
+		Fn<bool()> paused);
+	void setActiveSectionFast(int active, bool ignoreScroll = false);
+
+	[[nodiscard]] int sectionsCount() const;
+	[[nodiscard]] rpl::producer<int> sectionActivated() const;
+	[[nodiscard]] rpl::producer<int> sectionContextMenu() const;
+	[[nodiscard]] int lookupSectionPosition(int index) const;
+
+	bool buttonPaused() override;
+	float64 buttonActive(not_null<SubsectionButton*> button) override;
+	void buttonContextMenu(
+		not_null<SubsectionButton*> button,
+		not_null<QContextMenuEvent*> e) override;
+	Text::MarkedContext buttonContext() override;
+	[[nodiscard]] not_null<SubsectionButton*> buttonAt(int index);
+	void setButtonShift(int index, int shift);
+	void reorderButtons(int from, int to);
+	void recalculatePinnedPositions();
+	void recalculatePinnedPositionsByUI();
+
+	[[nodiscard]] rpl::producer<ScrollToRequest> requestShown() const;
+
+	void setIsReorderingCallback(Fn<bool()> callback);
+
+	[[nodiscard]] bool isVertical() const {
+		return _vertical;
+	}
+
+protected:
+	struct Range {
+		int from = 0;
+		int size = 0;
+	};
+
+	SubsectionSlider(not_null<QWidget*> parent, bool vertical);
+	void setupBar();
+
+	void paintEvent(QPaintEvent *e) override;
+
+	[[nodiscard]] int lookupSectionIndex(QPoint position) const;
+	[[nodiscard]] Range getFinalActiveRange() const;
+	[[nodiscard]] Range getCurrentActiveRange() const;
+	void activate(int index);
+
+	[[nodiscard]] virtual std::unique_ptr<SubsectionButton> makeButton(
+		SubsectionTab &&data) = 0;
+
+	const bool _vertical = false;
+
+	const style::ChatTabsOutline &_barSt;
+	RpWidget *_bar = nullptr;
+	RoundRect _barRect;
+
+	std::vector<std::unique_ptr<SubsectionButton>> _tabs;
+	bool _tabsReorderedOnce = false;
+	int _active = -1;
+	int _pressed = -1;
+	Animations::Simple _activeFrom;
+	Animations::Simple _activeSize;
+
+	//int _buttonIndexHint = 0;
+
+	Text::MarkedContext _context;
+	int _fixedCount = 0;
+	int _pinnedCount = 0;
+	bool _reorderAllowed = false;
+
+	rpl::event_stream<int> _sectionActivated;
+	rpl::event_stream<int> _sectionContextMenu;
+	Fn<bool()> _paused;
+
+	rpl::event_stream<ScrollToRequest> _requestShown;
+
+	Fn<bool()> _isReorderingCallback;
+
+};
+
+class VerticalSlider final : public SubsectionSlider {
+public:
+	explicit VerticalSlider(not_null<QWidget*> parent);
+	~VerticalSlider();
+
+private:
+	std::unique_ptr<SubsectionButton> makeButton(
+		SubsectionTab &&data) override;
+
+};
+
+class HorizontalSlider final : public SubsectionSlider {
+public:
+	explicit HorizontalSlider(not_null<QWidget*> parent);
+	~HorizontalSlider();
+
+private:
+	std::unique_ptr<SubsectionButton> makeButton(
+		SubsectionTab &&data) override;
+
+	const style::SettingsSlider &_st;
+
+};
+
+[[nodiscard]] std::shared_ptr<DynamicImage> MakeAllSubsectionsThumbnail(
+	Fn<QColor()> textColor);
+[[nodiscard]] std::shared_ptr<DynamicImage> MakeNewChatSubsectionsThumbnail(
+	Fn<QColor()> textColor);
+
+} // namespace Ui