plasma-framework/animations/pulser.cpp

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/* Copyright (C) 2009 Adenilson Cavalcanti <cavalcantii@gmail.com>
*
* 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.
*/
/* TODO:
* - fix centering of pulsed shadow object
*/
#include "pulser.h"
#include <QGraphicsWidget>
#include <QEvent>
#include <QAbstractAnimation>
#include <QParallelAnimationGroup>
#include <QDebug>
#include <QPropertyAnimation>
namespace Plasma
{
class PulseAnimationPrivate
{
public:
PulseAnimationPrivate(): animation(0),
under(0),
pulseGeometry(0),
zvalue(0),
mscale(0),
opacityAnimation(0),
geometryAnimation(0),
scaleAnimation(0)
{}
QAbstractAnimation *animation;
QGraphicsWidget *under;
QRectF *pulseGeometry;
qreal zvalue, mscale, mopacity;
QPropertyAnimation *opacityAnimation;
QPropertyAnimation *geometryAnimation;
QPropertyAnimation *scaleAnimation;
};
PulseAnimation::PulseAnimation(): d(new PulseAnimationPrivate)
{
}
PulseAnimation::~PulseAnimation()
{
//XXX: current plasma::Animation model will delete all animation objects
// delete animation;
// delete pulseGeometry;
delete d;
}
void PulseAnimation::setCopy(QGraphicsWidget *copy)
{
QGraphicsWidget *target = animatedWidget();
d->under = copy;
if (d->under != target) {
d->under->setParentItem(target);
d->mopacity = 0;
} else {
d->mopacity = d->under->opacity();
}
d->zvalue = target->zValue();
--d->zvalue;
d->under->setOpacity(0);
d->under->setZValue(d->zvalue);
d->mscale = d->under->scale();
}
void PulseAnimation::updateGeometry(QRectF updated, qreal zCoordinate, qreal scale)
{
d->zvalue = zCoordinate;
--d->zvalue;
d->under->setGeometry(updated);
d->under->setPos(0, 0);
d->under->setOpacity(0);
d->under->setZValue(d->zvalue);
/* TODO: move this to a function */
QRectF initial(d->under->geometry());
qreal W = initial.width() * scale * 0.33;
qreal H = initial.height() * scale * 0.33;
QRectF end(initial.x() - W, initial.y() - H, initial.width() * scale,
initial.height() * scale);
d->geometryAnimation->setEndValue(end);
}
void PulseAnimation::resetPulser()
{
d->under->setGeometry(*d->pulseGeometry);
d->under->setOpacity(d->mopacity);
d->under->setZValue(d->zvalue);
d->under->setScale(d->mscale);
}
void PulseAnimation::createAnimation(qreal duration, qreal scale)
{
QGraphicsWidget *target = animatedWidget();
/* Fallback to parent widget if we don't have one 'shadow' widget */
if (!d->under) {
setCopy(target);
} else if (d->under != target) {
delete d->under;
d->under = new QGraphicsWidget(target);
setCopy(d->under);
}
d->pulseGeometry = new QRectF(d->under->geometry());
QParallelAnimationGroup *group = new QParallelAnimationGroup(this);
d->opacityAnimation = new QPropertyAnimation(d->under, "opacity");
d->opacityAnimation->setDuration(duration);
d->opacityAnimation->setEndValue(0);
group->addAnimation(d->opacityAnimation);
/* TODO: move this to a function */
d->geometryAnimation = new QPropertyAnimation(d->under, "geometry");
d->geometryAnimation->setDuration(duration);
QRectF initial(d->under->geometry());
qreal W = initial.width() * scale * 0.33;
qreal H = initial.height() * scale * 0.33;
QRectF end(initial.x() - W, initial.y() - H, initial.width() * scale,
initial.height() * scale);
d->geometryAnimation->setEndValue(end);
group->addAnimation(d->geometryAnimation);
d->scaleAnimation = new QPropertyAnimation(d->under, "scale");
d->scaleAnimation->setDuration(duration);
d->scaleAnimation->setEndValue(scale);
group->addAnimation(d->scaleAnimation);
d->animation = group;
//This makes sure that if there is *not* a shadow widget, the
//parent widget will still remain visible
connect(d->animation, SIGNAL(finished()), this, SLOT(resetPulser()));
}
QAbstractAnimation* PulseAnimation::render(QObject* parent)
{
Q_UNUSED(parent);
createAnimation();
d->under->setOpacity(1);
return d->animation;
}
void PulseAnimation::start()
{
d->under->setOpacity(1);
d->animation->start();
}
} //namespace Plasma