100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/*
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* Copyright 2009 Mehmet Ali Akmanalp <makmanalp@wpi.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "fade_p.h"
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#include <QRect>
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#include <kdebug.h>
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namespace Plasma
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{
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FadeAnimation::FadeAnimation(QObject *parent)
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: Animation(parent),
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m_startOpacity(0),
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m_targetOpacity(1)
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{
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}
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FadeAnimation::~FadeAnimation()
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{
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}
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void FadeAnimation::setStartOpacity(qreal factor)
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{
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m_startOpacity = qBound(qreal(0.0), factor, qreal(1.0));
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}
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qreal FadeAnimation::startOpacity() const
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{
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return m_startOpacity;
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}
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void FadeAnimation::setTargetOpacity(qreal factor)
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{
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m_targetOpacity = qBound(qreal(0.0), factor, qreal(1.0));
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}
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qreal FadeAnimation::targetOpacity() const
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{
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return m_targetOpacity;
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}
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void FadeAnimation::setWidgetToAnimate(QGraphicsWidget *widget)
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{
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if (widget == widgetToAnimate()) {
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return;
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}
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Animation::setWidgetToAnimate(widget);
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if (widget) {
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widget->setOpacity(m_startOpacity);
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}
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}
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void FadeAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
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{
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QGraphicsWidget *w = widgetToAnimate();
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if (!w) {
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return;
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}
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if (oldState == Stopped && newState == Running) {
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w->setOpacity(direction() == Forward ? m_startOpacity : m_targetOpacity);
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} else if (newState == Stopped) {
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w->setOpacity(direction() == Forward ? m_targetOpacity : m_startOpacity);
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}
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}
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void FadeAnimation::updateCurrentTime(int currentTime)
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{
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QGraphicsWidget *w = widgetToAnimate();
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if (w) {
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qreal delta = currentTime / qreal(duration());
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delta = (m_startOpacity - m_targetOpacity) *
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easingCurve().valueForProgress(delta);
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w->setOpacity(m_startOpacity - delta);
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}
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Animation::updateCurrentTime(currentTime);
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}
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} //namespace Plasma
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