plasma-framework/animations/fade.cpp
Aaron J. Seigo fd48743847 set start value; now it can go backwards too
svn path=/trunk/KDE/kdelibs/; revision=1038848
2009-10-22 03:59:46 +00:00

87 lines
2.1 KiB
C++

/*
* Copyright 2009 Mehmet Ali Akmanalp <makmanalp@wpi.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "fade.h"
#include <QRect>
#include <QtGui/QGraphicsOpacityEffect>
#include <kdebug.h>
namespace Plasma
{
class FadeAnimationPrivate
{
public:
FadeAnimationPrivate()
{
}
~FadeAnimationPrivate()
{
}
QGraphicsOpacityEffect *opacityEffect;
};
FadeAnimation::FadeAnimation(qreal factor)
: d(new FadeAnimationPrivate()),
m_animFactor(qBound(qreal(0.0), factor, qreal(1.0)))
{
}
FadeAnimation::~FadeAnimation()
{
delete d;
}
void FadeAnimation::setWidgetToAnimate(QGraphicsWidget *widget)
{
QGraphicsWidget *m_widget = widgetToAnimate();
if (m_widget) {
QGraphicsEffect *effect = m_widget->graphicsEffect();
if (effect && dynamic_cast<QGraphicsOpacityEffect *>(effect)) {
effect->deleteLater();
}
}
Animation::setWidgetToAnimate(widget);
d->opacityEffect = new QGraphicsOpacityEffect(widget);
widget->setGraphicsEffect(d->opacityEffect);
}
QAbstractAnimation* FadeAnimation::render(QObject* parent)
{
//create animation
QPropertyAnimation* anim = new QPropertyAnimation(d->opacityEffect, "opacity", parent);
anim->setStartValue(0);
anim->setEndValue(m_animFactor);
anim->setDuration(duration());
//QObject::connect(anim, SIGNAL(finished()), anim, SLOT(deleteLater()));
return anim;
}
} //namespace Plasma