/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team

  This program 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.

  This program 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.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#ifndef SCROLLINGLABEL_H
#define SCROLLINGLABEL_H

#include <QTimer>
#include <QWidget>

namespace olive
{

class ScrollingLabel : public QWidget {
	Q_OBJECT
public:
	ScrollingLabel(QWidget *parent = nullptr);
	ScrollingLabel(const QStringList &text, QWidget *parent = nullptr);

	void SetText(const QStringList &text);

	void StartAnimating()
	{
		timer_.start();
	}

	void StopAnimating()
	{
		timer_.stop();
	}

protected:
	virtual void paintEvent(QPaintEvent *e) override;

private:
	static void SetOpacityOfScanLine(uchar *scan_line, int width, int channels,
									 double mul);

	static const int kMinLineHeight;

	QStringList text_;

	int text_height_;

	QTimer timer_;

	int animate_;

private slots:
	void AnimationUpdate();
};

}

#endif // SCROLLINGLABEL_H