plasma-framework/animations/zoom.cpp
Igor Trindade Oliveira 22c6f8e31b fix zoom animation: change transform origin point to widget center
svn path=/trunk/KDE/kdelibs/; revision=1059966
2009-12-07 19:55:22 +00:00

76 lines
1.9 KiB
C++

/*
* Copyright 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>
*
* 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 "zoom_p.h"
#include <kdebug.h>
namespace Plasma
{
ZoomAnimation::ZoomAnimation(QObject *parent)
: Animation(parent),
m_zoom(1)
{
}
ZoomAnimation::~ZoomAnimation()
{
}
void ZoomAnimation::setZoom(qreal zoom)
{
m_zoom = zoom;
}
qreal ZoomAnimation::zoom() const
{
return m_zoom;
}
void ZoomAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
{
QGraphicsWidget *w = widgetToAnimate();
if (!w) {
return;
}
if (oldState == Stopped && newState == Running) {
w->setTransformOriginPoint(w->size().width()/2, w->size().height()/2);
w->setScale(direction() == Forward ? 1 : m_zoom);
} else if (newState == Stopped) {
w->setScale(direction() == Forward ? m_zoom : 1);
}
}
void ZoomAnimation::updateCurrentTime(int currentTime)
{
QGraphicsWidget *w = widgetToAnimate();
if (w) {
qreal delta = currentTime / qreal(duration());
delta = (1 - m_zoom) * delta;
w->setScale( 1 - delta);
}
Animation::updateCurrentTime(currentTime);
}
} //namespace Plasma