76 lines
2.1 KiB
C++
76 lines
2.1 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 "grow.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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GrowAnimation::GrowAnimation(qreal factor)
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: m_animFactor(factor)
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{
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}
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void GrowAnimation::setFactor(qreal factor)
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{
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m_animFactor = qBound(qreal(0.0), factor, qreal(1.0));
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}
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qreal GrowAnimation::factor() const
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{
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return m_animFactor;
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}
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QAbstractAnimation* GrowAnimation::render(QObject* parent){
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//get current geometry values
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QGraphicsWidget *m_object = widgetToAnimate();
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QRectF geometry = m_object->geometry();
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qreal w = geometry.width();
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qreal h = geometry.height();
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//compute new geometry values
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qreal factor = m_animFactor;
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qreal newWidth = w * factor;
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qreal newHeight = h * factor;
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//locfactor is factor by which object must move up and left
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//to compensate for its growth down and right, to keep the
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//center in place.
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qreal locfactor = (factor - 1) / 2.0;
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qreal newX = geometry.x() - w * locfactor;
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qreal newY = geometry.y() - h * locfactor;
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//create animation
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QPropertyAnimation* anim = new QPropertyAnimation(m_object, "geometry", parent);
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anim->setEndValue(QRectF(
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newX, newY,
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newWidth, newHeight));
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anim->setDuration(duration());
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//QObject::connect(anim, SIGNAL(finished()), anim, SLOT(deleteLater()));
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return anim;
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}
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} //namespace Plasma
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