//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// It is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#pragma once

#include "ui/animation.h"
#include "ui/twidget.h"
#include <QPixmap>

namespace Window {

enum class SlideDirection {
	FromRight,
	FromLeft,
};

class SlideAnimation {
public:
	void paintContents(Painter &p, const QRect &update) const;

	void setDirection(SlideDirection direction);
	void setPixmaps(const QPixmap &oldContentCache, const QPixmap &newContentCache);
	void setTopBarShadow(bool enabled);

	using RepaintCallback = Fn<void()>;
	void setRepaintCallback(RepaintCallback &&callback);

	using FinishedCallback = Fn<void()>;
	void setFinishedCallback(FinishedCallback &&callback);

	void start();

	static const anim::transition &transition() {
		return anim::easeOutCirc;
	}

private:
	void animationCallback();

	SlideDirection _direction = SlideDirection::FromRight;
	bool _topBarShadowEnabled = false;

	mutable Animation _animation;
	QPixmap _cacheUnder, _cacheOver;

	RepaintCallback _repaintCallback;
	FinishedCallback _finishedCallback;
};

} // namespace Window