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Telegram/SourceFiles/ui/widgets/multi_select.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/object_ptr.h"
+#include "ui/rp_widget.h"
+
+namespace style {
+struct MultiSelect;
+} // namespace style
+
+namespace Ui {
+
+class ScrollArea;
+
+class MultiSelect : public RpWidget {
+public:
+	MultiSelect(
+		QWidget *parent,
+		const style::MultiSelect &st,
+		rpl::producer<QString> placeholder = nullptr,
+		const QString &query = QString());
+
+	[[nodiscard]] QString getQuery() const;
+	void setQuery(const QString &query);
+	void setInnerFocus();
+	void clearQuery();
+
+	void setQueryChangedCallback(Fn<void(const QString &query)> callback);
+	void setSubmittedCallback(Fn<void(Qt::KeyboardModifiers)> callback);
+	void setCancelledCallback(Fn<void()> callback);
+	void setResizedCallback(Fn<void()> callback);
+
+	enum class AddItemWay {
+		Default,
+		SkipAnimation,
+	};
+	using PaintRoundImage = Fn<void(Painter &p, int x, int y, int outerWidth, int size)>;
+	void addItem(uint64 itemId, const QString &text, style::color color, PaintRoundImage paintRoundImage, AddItemWay way = AddItemWay::Default);
+	void addItemInBunch(uint64 itemId, const QString &text, style::color color, PaintRoundImage paintRoundImage);
+	void finishItemsBunch();
+	void setItemText(uint64 itemId, const QString &text);
+
+	void setItemRemovedCallback(Fn<void(uint64 itemId)> callback);
+	void removeItem(uint64 itemId);
+
+	int getItemsCount() const;
+	QVector<uint64> getItems() const;
+	bool hasItem(uint64 itemId) const;
+
+protected:
+	int resizeGetHeight(int newWidth) override;
+	bool eventFilter(QObject *o, QEvent *e) override;
+
+private:
+	void scrollTo(int activeTop, int activeBottom);
+
+	const style::MultiSelect &_st;
+
+	object_ptr<Ui::ScrollArea> _scroll;
+
+	class Inner;
+	QPointer<Inner> _inner;
+
+	Fn<void()> _resizedCallback;
+	Fn<void(const QString &query)> _queryChangedCallback;
+
+};
+
+} // namespace Ui