plasma-framework/animations/fade.cpp
Marco Martin 47a6082bf5 use opacity, not a qgraphicseffect, since an item can't have more than
one effect and the opacity property of the widget would lie.
if there will be graphics glitches it would be a qt problem that should
be resolved, not by a workaround

svn path=/trunk/KDE/kdelibs/; revision=1047550
2009-11-11 12:04:58 +00:00

89 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_p.h"
#include <QRect>
#include <kdebug.h>
namespace Plasma
{
FadeAnimation::FadeAnimation(QObject *parent)
: Animation(parent),
m_startOpacity(0),
m_targetOpacity(1)
{
}
FadeAnimation::~FadeAnimation()
{
}
void FadeAnimation::setStartOpacity(qreal factor)
{
m_startOpacity = qBound(qreal(0.0), factor, qreal(1.0));
}
qreal FadeAnimation::startOpacity() const
{
return m_startOpacity;
}
void FadeAnimation::setTargetOpacity(qreal factor)
{
m_targetOpacity = qBound(qreal(0.0), factor, qreal(1.0));
}
qreal FadeAnimation::targetOpacity() const
{
return m_targetOpacity;
}
void FadeAnimation::setWidgetToAnimate(QGraphicsWidget *widget)
{
Animation::setWidgetToAnimate(widget);
if (widget) {
widget->setOpacity(m_startOpacity);
m_widget = widget;
}
}
QAbstractAnimation* FadeAnimation::render(QObject* parent)
{
//create animation
QPropertyAnimation* anim = dynamic_cast<QPropertyAnimation* >(animation());
if (!anim) {
anim = new QPropertyAnimation(m_widget.data(), "opacity", parent);
setAnimation(anim);
}
anim->setStartValue(m_startOpacity);
anim->setEndValue(m_targetOpacity);
anim->setDuration(duration());
return anim;
}
} //namespace Plasma