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Telegram/SourceFiles/ui/boxes/calendar_box.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 "ui/layers/box_content.h"
+#include "ui/widgets/tooltip.h"
+#include "base/required.h"
+#include "base/timer.h"
+
+#include <QtCore/QDate>
+
+namespace style {
+struct CalendarSizes;
+struct CalendarColors;
+} // namespace style
+
+namespace st {
+extern const style::CalendarSizes &defaultCalendarSizes;
+extern const style::CalendarColors &defaultCalendarColors;
+} // namespace st
+
+namespace Ui {
+
+class IconButton;
+class ScrollArea;
+class CalendarBox;
+
+struct CalendarBoxArgs {
+	template <typename T>
+	using required = base::required<T>;
+
+	required<QDate> month;
+	required<QDate> highlighted;
+	required<Fn<void(QDate date)>> callback;
+	FnMut<void(not_null<CalendarBox*>)> finalize;
+	const style::CalendarSizes &st = st::defaultCalendarSizes;
+	QDate minDate;
+	QDate maxDate;
+	bool allowsSelection = false;
+	Fn<void(
+		not_null<Ui::CalendarBox*>,
+		std::optional<int>)> selectionChanged;
+	const style::CalendarColors &stColors = st::defaultCalendarColors;
+};
+
+class CalendarBox final : public BoxContent, private AbstractTooltipShower {
+public:
+	CalendarBox(QWidget*, CalendarBoxArgs &&args);
+	~CalendarBox();
+
+	void toggleSelectionMode(bool enabled);
+
+	[[nodiscard]] QDate selectedFirstDate() const;
+	[[nodiscard]] QDate selectedLastDate() const;
+
+protected:
+	void prepare() override;
+
+	void keyPressEvent(QKeyEvent *e) override;
+	void resizeEvent(QResizeEvent *e) override;
+
+private:
+	void monthChanged(QDate month);
+
+	bool isPreviousEnabled() const;
+	bool isNextEnabled() const;
+
+	void goPreviousMonth();
+	void goNextMonth();
+	void setExactScroll();
+	void processScroll();
+	void createButtons();
+
+	void showJumpTooltip(not_null<IconButton*> button);
+	void jumpAfterDelay(not_null<IconButton*> button);
+	void jump(QPointer<IconButton> button);
+
+	QString tooltipText() const override;
+	QPoint tooltipPos() const override;
+	bool tooltipWindowActive() const override;
+
+	const style::CalendarSizes &_st;
+	const style::CalendarColors &_styleColors;
+
+	class Context;
+	std::unique_ptr<Context> _context;
+
+	std::unique_ptr<ScrollArea> _scroll;
+
+	class Inner;
+	not_null<Inner*> _inner;
+
+	class FloatingDate;
+	std::unique_ptr<FloatingDate> _floatingDate;
+
+	class Title;
+	object_ptr<Title> _title;
+	object_ptr<IconButton> _previous;
+	object_ptr<IconButton> _next;
+	bool _previousEnabled = false;
+	bool _nextEnabled = false;
+
+	Fn<void(QDate date)> _callback;
+	FnMut<void(not_null<CalendarBox*>)> _finalize;
+	bool _watchScroll = false;
+
+	QPointer<IconButton> _tooltipButton;
+	QPointer<IconButton> _jumpButton;
+	base::Timer _jumpTimer;
+
+	bool _selectionMode = false;
+	Fn<void(
+		not_null<Ui::CalendarBox*>,
+		std::optional<int>)> _selectionChanged;
+
+};
+
+} // namespace Ui