plasma-framework/animations/fade.cpp
Adenilson Cavalcanti Da Silva 5a721b9bad Creating a QEasingCurve object in AnimationPrivate and allowing access to
it to all Animation derived classes.

The idea is that the user can select the easing curve (if the it makes sense
in the animation).


svn path=/trunk/KDE/kdelibs/; revision=1060687
2009-12-09 16:28:27 +00:00

101 lines
2.5 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)
{
if (widget == widgetToAnimate()) {
return;
}
Animation::setWidgetToAnimate(widget);
if (widget) {
widget->setOpacity(m_startOpacity);
}
}
void FadeAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
{
QGraphicsWidget *w = widgetToAnimate();
if (!w) {
return;
}
if (oldState == Stopped && newState == Running) {
w->setOpacity(direction() == Forward ? m_startOpacity : m_targetOpacity);
} else if (newState == Stopped) {
w->setOpacity(direction() == Forward ? m_targetOpacity : m_startOpacity);
}
}
void FadeAnimation::updateCurrentTime(int currentTime)
{
QGraphicsWidget *w = widgetToAnimate();
if (w) {
qreal delta = currentTime / qreal(duration());
delta = (m_startOpacity - m_targetOpacity) *
Animation::easingCurve().valueForProgress(delta);
w->setOpacity(m_startOpacity - delta);
}
Animation::updateCurrentTime(currentTime);
}
} //namespace Plasma