presentationgl.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2004-01-19
 * Description : a presentation tool.
 *
 * Copyright (C)      2004 by Renchi Raju <renchi dot raju at gmail dot com>
 * Copyright (C) 2006-2009 by Valerio Fuoglio <valerio.fuoglio@gmail.com>
 * Copyright (C)      2009 by Andi Clemens <andi dot clemens at googlemail dot com>
 * Copyright (C) 2012-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C)      2021 by Phuoc Khanh Le <phuockhanhnk94 at gmail dot com>
 *
 * 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 2, 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.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_PRESENTATION_GL_H
#define DIGIKAM_PRESENTATION_GL_H
 
#ifdef Q_CC_MSVC
#   include <winsock2.h>
#endif
 
// Qt includes
 
#include <QOpenGLWidget>
#include <QKeyEvent>
#include <QList>
#include <QMap>
#include <QMouseEvent>
#include <QPair>
#include <QString>
#include <QStringList>
#include <QWheelEvent>
#include <QRandomGenerator>
 
namespace DigikamGenericPresentationPlugin
{
 
class PresentationContainer;
 
class PresentationGL : public QOpenGLWidget
{
    Q_OBJECT
 
public:
 
    explicit PresentationGL(PresentationContainer* const sharedData);
    ~PresentationGL()                  override;
 
    void registerEffects();
 
    static QStringList effectNames();
    static QMap<QString, QString> effectNamesI18N();
 
    bool checkOpenGL() const;
 
protected:
 
    void initializeGL()                override;
    void paintGL()                     override;
    void resizeGL(int w, int h)        override;
 
    void mousePressEvent(QMouseEvent*) override;
    void mouseMoveEvent(QMouseEvent*)  override;
    void wheelEvent(QWheelEvent*)      override;
    void keyPressEvent(QKeyEvent*)     override;
 
private:
 
    typedef void (PresentationGL::*EffectMethod)();
 
    QPixmap       generateOutlinedTextPixmap(const QString& text);
    QPixmap       generateOutlinedTextPixmap(const QString& text, QFont& fn);
    QPixmap       generateCustomOutlinedTextPixmap(const QString& text,
                                                   QFont& fn, QColor& fgColor, QColor& bgColor,
                                                   int opacity, bool transBg = true);
 
    void          paintTexture();
    void          advanceFrame();
    void          previousFrame();
    void          loadImage();
    void          montage(QImage& top, QImage& bot);
    EffectMethod  getRandomEffect();
    void          showEndOfShow();
    void          showOverlays();
    void          hideOverlays();
    void          printFilename(QImage& layer);
    void          printProgress(QImage& layer);
    void          printComments(QImage& layer);
 
    void          effectNone();
    void          effectBlend();
    void          effectFade();
    void          effectRotate();
    void          effectBend();
    void          effectInOut();
    void          effectSlide();
    void          effectFlutter();
    void          effectCube();
 
private Q_SLOTS:
 
    void slotTimeOut();
    void slotMouseMoveTimeOut();
 
    void slotPause();
    void slotPlay();
    void slotPrev();
    void slotNext();
    void slotClose();
 
private:
 
    // Disable
    explicit PresentationGL(QWidget*) = delete;
 
private:
 
    class Private;
    Private* const d;
    QRandomGenerator *randomGenerator;
};
 
} // namespace DigikamGenericPresentationPlugin
 
#endif // DIGIKAM_PRESENTATION_GL_H