File indexing completed on 2025-03-09 03:52:07

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2007-11-14
  * Description : a presentation tool.
  *
  * SPDX-FileCopyrightText: 2007-2008 by Valerio Fuoglio <valerio dot fuoglio at gmail dot com>
  * SPDX-FileCopyrightText: 2012-2024 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>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #ifndef DIGIKAM_KB_EFFECT_H
 #define DIGIKAM_KB_EFFECT_H
 
 // Qt includes
 
 #include <QObject>
 
 namespace DigikamGenericPresentationPlugin
 {
 
 class KBImage;
 class PresentationKB;
 
 class KBEffect
 {
 
 public:
 
     typedef enum
     {
         Fade,
         Blend
     } Type;
 
 public:
 
     explicit KBEffect(PresentationKB* const parent, bool m_needFadeIn = true);
     virtual ~KBEffect()                  = default;
 
     virtual bool fadeIn()       const
     {
         return m_needFadeIn;
     };
 
     virtual void advanceTime(float step) = 0;
     virtual Type type()                  = 0;
     virtual bool done()                  = 0;
 
     static Type chooseKBEffect(Type oldType);
 
 protected:
 
     void     setupNewImage(int img);
     void     swapImages();
     KBImage* image(int img)     const;
 
 protected:
 
     static int      m_numKBEffectRepeated;
     bool            m_needFadeIn  = false;
     KBImage*        m_img[2];;
 
 private:
 
     PresentationKB* m_slideWidget = nullptr;
 
 private:
 
     Q_DISABLE_COPY(KBEffect)
 };
 
 // -------------------------------------------------------------------------
 
 class FadeKBEffect: public KBEffect
 {
 
 public:
 
     explicit FadeKBEffect(PresentationKB* const parent, bool m_needFadeIn = true);
     ~FadeKBEffect()              override;
 
     Type type()                  override
     {
         return Fade;
     };
 
     void advanceTime(float step) override;
     bool done()                  override;
 
 private:
 
     Q_DISABLE_COPY(FadeKBEffect)
 };
 
 // -------------------------------------------------------------------------
 
 class BlendKBEffect: public KBEffect
 {
 
 public:
 
     explicit BlendKBEffect(PresentationKB* const parent, bool m_needFadeIn = true);
     ~BlendKBEffect()             override;
 
     Type type()                  override
     {
         return Blend;
     };
 
     void advanceTime(float step) override;
     bool done()                  override;
 
 private:
 
     Q_DISABLE_COPY(BlendKBEffect)
 };
 
 } // namespace DigikamGenericPresentationPlugin
 
 #endif // DIGIKAM°KB_EFFECT_H