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Telegram/lib_ui/ui/widgets/tooltip.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "base/timer.h"
+#include "base/object_ptr.h"
+#include "ui/effects/animations.h"
+#include "ui/text/text.h"
+#include "ui/rp_widget.h"
+#include "ui/rect_part.h"
+
+namespace style {
+struct Tooltip;
+struct ImportantTooltip;
+struct FlatLabel;
+struct PopupMenu;
+} // namespace style
+
+namespace st {
+extern const style::FlatLabel &defaultFlatLabel;
+extern const style::PopupMenu &defaultPopupMenu;
+} // namespace st
+
+namespace Ui {
+
+class FlatLabel;
+
+class AbstractTooltipShower {
+public:
+	virtual QString tooltipText() const = 0;
+	virtual QPoint tooltipPos() const = 0;
+	virtual bool tooltipWindowActive() const = 0;
+	virtual const style::Tooltip *tooltipSt() const;
+	virtual ~AbstractTooltipShower();
+
+};
+
+class Tooltip : public RpWidget {
+public:
+	QAccessible::Role accessibilityRole() override {
+		return QAccessible::ToolTip;
+	}
+	QString accessibilityName() override {
+		return _text.toString();
+	}
+
+	static void Show(int32 delay, const AbstractTooltipShower *shower);
+	static void Hide();
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+	void hideEvent(QHideEvent *e) override;
+
+	bool eventFilter(QObject *o, QEvent *e) override;
+
+private:
+	void performShow();
+
+	Tooltip();
+	~Tooltip();
+
+	void popup(const QPoint &p, const QString &text, const style::Tooltip *st);
+
+	friend class AbstractTooltipShower;
+	const AbstractTooltipShower *_shower = nullptr;
+	base::Timer _showTimer;
+
+	Text::String _text;
+	QPoint _point;
+
+	const style::Tooltip *_st = nullptr;
+
+	base::Timer _hideByLeaveTimer;
+	bool _isEventFilter = false;
+	bool _useTransparency = true;
+
+};
+
+class ImportantTooltip : public RpWidget {
+public:
+	ImportantTooltip(
+		QWidget *parent,
+		object_ptr<RpWidget> content,
+		const style::ImportantTooltip &st);
+
+	QAccessible::Role accessibilityRole() override {
+		return QAccessible::Role::ToolTip;
+	}
+
+	void pointAt(
+		QRect area,
+		RectParts preferSide = RectPart::Top | RectPart::Left,
+		Fn<QPoint(QSize)> countPosition = nullptr);
+
+	void toggleAnimated(bool visible);
+	void toggleFast(bool visible);
+	void hideAfter(crl::time timeout);
+	void updateGeometry();
+
+	void setHiddenCallback(Fn<void()> callback) {
+		_hiddenCallback = std::move(callback);
+	}
+
+protected:
+	void resizeEvent(QResizeEvent *e) override;
+	void paintEvent(QPaintEvent *e) override;
+
+private:
+	void animationCallback();
+	[[nodiscard]] QRect countInner() const;
+	void countApproachSide(RectParts preferSide);
+	void resizeToContent();
+	void checkAnimationFinish();
+	void refreshAnimationCache();
+	[[nodiscard]] QPoint countPosition() const;
+
+	base::Timer _hideTimer;
+	const style::ImportantTooltip &_st;
+	object_ptr<RpWidget> _content;
+	QRect _area;
+	RectParts _side = RectPart::Top | RectPart::Left;
+	QPixmap _arrow;
+
+	Ui::Animations::Simple _visibleAnimation;
+	Fn<QPoint(QSize)> _countPosition;
+	bool _visible = false;
+	Fn<void()> _hiddenCallback;
+	QPixmap _cache;
+
+};
+
+[[nodiscard]] int FindNiceTooltipWidth(
+	int minWidth,
+	int maxWidth,
+	Fn<int(int width)> heightForWidth);
+
+[[nodiscard]] object_ptr<FlatLabel> MakeNiceTooltipLabel(
+	QWidget *parent,
+	rpl::producer<TextWithEntities> &&text,
+	int maxWidth,
+	const style::FlatLabel &st = st::defaultFlatLabel,
+	const style::PopupMenu &stMenu = st::defaultPopupMenu,
+	const Text::MarkedContext &context = {});
+
+} // namespace Ui