presentationkb.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2007-11-14
 * Description : a presentation tool.
 *
 * Copyright (C) 2007-2009 by Valerio Fuoglio <valerio dot fuoglio at gmail dot com>
 * Copyright (C) 2012-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * Parts of this code are based on
 * smoothslidesaver by Carsten Weinhold <carsten dot weinhold at gmx dot de>
 * and slideshowgl by Renchi Raju <renchi dot raju 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_KB_H
#define DIGIKAM_PRESENTATION_KB_H
 
// C++ includes
 
#ifndef Q_CC_MSVC
#   include <cstdlib>
#else
#   include <winsock2.h>
#endif
 
// Qt includes
 
#include <QList>
#include <QKeyEvent>
#include <QMap>
#include <QMouseEvent>
#include <QPair>
#include <QString>
#include <QStringList>
#include <QTimer>
#include <QOpenGLWidget>
#include <QOpenGLTexture>
#include <QRandomGenerator>
 
namespace DigikamGenericPresentationPlugin
{
 
class PresentationContainer;
 
class KBViewTrans
{
 
public:
 
    KBViewTrans(bool zoomIn, float relAspect);
    KBViewTrans();
    ~KBViewTrans();
 
    float transX(float pos) const;
    float transY(float pos) const;
    float scale(float pos)  const;
    float xScaleCorrect()   const;
    float yScaleCorrect()   const;
 
private:
 
    double rnd()            const;
    double rndSign()        const;
 
private:
 
    double m_deltaX;
    double m_deltaY;
    double m_deltaScale;
    double m_baseScale;
    double m_baseX;
    double m_baseY;
    float  m_xScale;
    float  m_yScale;
};
 
// -------------------------------------------------------------------------
 
class KBImage
{
 
public:
 
    explicit KBImage(KBViewTrans* const viewTrans, float aspect = 1.0);
    ~KBImage();
 
public:
 
    KBViewTrans*    m_viewTrans;
    float           m_aspect;
    float           m_pos;
    float           m_opacity;
    bool            m_paint;
    QOpenGLTexture* m_texture;
};
 
// -------------------------------------------------------------------------
 
class PresentationKB : public QOpenGLWidget
{
    Q_OBJECT
 
public:
 
    explicit PresentationKB(PresentationContainer* const sharedData);
 
    ~PresentationKB() override;
 
    static QStringList            effectNames();
    static QMap<QString, QString> effectNamesI18N();
 
    bool checkOpenGL()                      const;
 
private:
 
    float    aspect()                       const;
    bool     setupNewImage(int imageIndex);
    void     startSlideShowOnce();
    void     swapImages();
    void     setNewKBEffect();
    void     endOfShow();
 
    void     applyTexture(KBImage* const img, const QImage& image);
    void     paintTexture(KBImage* const img);
    unsigned suggestFrameRate(unsigned forceRate);
 
    void     readSettings();
 
protected:
 
    void initializeGL()                override;
    void paintGL()                     override;
    void resizeGL(int w, int h)        override;
 
    void mousePressEvent(QMouseEvent*) override;
    void mouseMoveEvent(QMouseEvent*)  override;
    void keyPressEvent(QKeyEvent*)     override;
 
private Q_SLOTS:
 
    void moveSlot();
    void slotMouseMoveTimeOut();
    void slotClose();
 
private:
 
    // Disable
    explicit PresentationKB(QWidget*) = delete;
 
private:
 
    class Private;
    Private* const d;
 
    friend class KBEffect;
};
 
} // namespace DigikamGenericPresentationPlugin
 
#endif // DIGIKAM_PRESENTATION_KB_H