tdesktop/Telegram/SourceFiles/ui/wrap/vertical_layout.h

/*
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/rp_widget.h"

namespace Ui {

class VerticalLayout : public RpWidget {
public:
	using RpWidget::RpWidget;

	int count() const {
		return _rows.size();
	}

	template <
		typename Widget,
		typename = std::enable_if_t<
			std::is_base_of_v<RpWidget, Widget>>>
	Widget *insert(
			int atPosition,
			object_ptr<Widget> &&child,
			const style::margins &margin = style::margins()) {
		return static_cast<Widget*>(insertChild(
			atPosition,
			std::move(child),
			margin));
	}

	template <
		typename Widget,
		typename = std::enable_if_t<
			std::is_base_of_v<RpWidget, Widget>>>
	Widget *add(
			object_ptr<Widget> &&child,
			const style::margins &margin = style::margins()) {
		return insert(count(), std::move(child), margin);
	}

	QMargins getMargins() const override;
	int naturalWidth() const override;

protected:
	int resizeGetHeight(int newWidth) override;
	void visibleTopBottomUpdated(
		int visibleTop,
		int visibleBottom) override;

private:
	RpWidget *insertChild(
		int addPosition,
		object_ptr<RpWidget> child,
		const style::margins &margin);
	void childHeightUpdated(RpWidget *child);
	void removeChild(RpWidget *child);
	void updateChildGeometry(
		const style::margins &margins,
		RpWidget *child,
		const style::margins &margin,
		int width,
		int top) const;

	struct Row {
		object_ptr<RpWidget> widget;
		style::margins margin;
	};
	std::vector<Row> _rows;
	bool _inResize = false;

};

} // namespace Ui