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183 | /* ============================================================
*
* 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: 2012-2025 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
*
* ============================================================ */
#include "kbeffect.h"
// Qt includes
#include <QRandomGenerator>
// Local includes
#include "presentationkb.h"
#include "presentationkb_p.h"
namespace DigikamGenericPresentationPlugin
{
// -------------------------------------------------------------------------
int KBEffect::m_numKBEffectRepeated = 0;
// -------------------------------------------------------------------------
KBEffect::KBEffect(PresentationKB* const parent, bool needFadeIn)
: m_needFadeIn (needFadeIn),
m_slideWidget(parent)
{
}
void KBEffect::setupNewImage(int img)
{
m_slideWidget->setupNewImage(img);
}
void KBEffect::swapImages()
{
m_slideWidget->swapImages();
}
KBImage* KBEffect::image(int img) const
{
Q_ASSERT ((img >= 0) && (img < 2));
return m_slideWidget->d->image[img];
}
KBEffect::Type KBEffect::chooseKBEffect(KBEffect::Type oldType)
{
KBEffect::Type type;<--- Shadow variable
do
{
type = (QRandomGenerator::global()->bounded(2U) == 0) ? KBEffect::Fade : KBEffect::Blend;
}
while ((type == oldType) && (m_numKBEffectRepeated >= 1));
if (type == oldType)
{
m_numKBEffectRepeated++;
}
else
{
m_numKBEffectRepeated = 0;
}
return type;
}
// -------------------------------------------------------------------------
FadeKBEffect::FadeKBEffect(PresentationKB* const parent, bool needFadeIn)
: KBEffect(parent, needFadeIn)
{
m_img[0] = image(0);
}
bool FadeKBEffect::done()
{
if (m_img[0]->m_pos >= 1.0)
{
setupNewImage(0);
return true;
}
return false;
}
void FadeKBEffect::advanceTime(float step)
{
m_img[0]->m_pos += step;
if (m_img[0]->m_pos >= 1.0)
{
m_img[0]->m_pos = 1.0;
}
if (m_needFadeIn && (m_img[0]->m_pos < 0.1))
{
m_img[0]->m_opacity = m_img[0]->m_pos * 10;
}
else if (m_img[0]->m_pos > 0.9)
{
m_img[0]->m_opacity = (1.0 - m_img[0]->m_pos) * 10;
}
else
{
m_img[0]->m_opacity = 1.0;
}
}
// -------------------------------------------------------------------------
BlendKBEffect::BlendKBEffect(PresentationKB* const parent, bool needFadeIn)
: KBEffect(parent, needFadeIn)
{
m_img[0] = image(0);
}
bool BlendKBEffect::done()
{
if (m_img[0]->m_pos >= 1.0)
{
m_img[0]->m_paint = false;
swapImages();
return true;
}
return false;
}
void BlendKBEffect::advanceTime(float step)
{
m_img[0]->m_pos += step;
if (m_img[0]->m_pos >= 1.0)
{
m_img[0]->m_pos = 1.0;
}
if (m_img[1])
{
m_img[1]->m_pos += step;
}
if (m_needFadeIn && (m_img[0]->m_pos < 0.1))
{
m_img[0]->m_opacity = m_img[0]->m_pos * 10;
}
else if (m_img[0]->m_pos > 0.9)
{
m_img[0]->m_opacity = (1.0 - m_img[0]->m_pos) * 10;
if (m_img[1] == nullptr)
{
setupNewImage(1);
m_img[1] = image(1);
m_img[1]->m_opacity = 1.0;
}
}
else
{
m_img[0]->m_opacity = 1.0;
}
}
} // namespace DigikamGenericPresentationPlugin
|