plasma-framework/animations/slide.cpp
Adenilson Cavalcanti Da Silva 485635f07b Experimenting with easing curves.
svn path=/trunk/KDE/kdelibs/; revision=1061361
2009-12-11 15:09:32 +00:00

137 lines
3.6 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 "slide_p.h"
#include <QPointF>
#include <kdebug.h>
namespace Plasma
{
void SlideAnimation::setDistance(qreal distance)
{
m_animDistance = distance;
}
qreal SlideAnimation::distance() const
{
return m_animDistance;
}
SlideAnimation::~SlideAnimation()
{
}
SlideAnimation::SlideAnimation(QObject *parent,
AnimationDirection direction,
qreal distance) : Animation(parent)
{
setMovementDirection(direction);
setDistance(distance);
Animation::setEasingCurveType(QEasingCurve::OutCirc);
}
void SlideAnimation::setMovementDirection(const qint8 &direction)
{
m_animDirection = static_cast<Plasma::AnimationDirection>(direction);
}
qint8 SlideAnimation::movementDirection() const
{
return static_cast<qint8>(m_animDirection);
}
void SlideAnimation::updateCurrentTime(int currentTime)
{
QGraphicsWidget *w = widgetToAnimate();
if (w && state() == QAbstractAnimation::Running) {
qreal delta = Animation::easingCurve().valueForProgress(
currentTime / qreal(duration()));
w->setPos(m_startPos * (1-delta) + (m_targetPos * delta));
}
}
void SlideAnimation::updateState(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
{
if (oldState == QAbstractAnimation::Stopped && newState == QAbstractAnimation::Running) {
if (!widgetToAnimate()) {
return;
}
m_startPos = widgetToAnimate()->pos();
qreal newX = m_startPos.x();
qreal newY = m_startPos.y();
int actualDistance = (direction() == QAbstractAnimation::Forward?distance():-distance());
switch (movementDirection()) {
case MoveUp:
newY -= actualDistance;
break;
case MoveRight:
newX += actualDistance;
break;
case MoveDown:
newY += actualDistance;
break;
case MoveLeft:
newX -= actualDistance;
break;
case MoveUpRight:
newX += actualDistance;
newY -= actualDistance;
break;
case MoveDownRight:
newX += actualDistance;
newY += actualDistance;
break;
case MoveDownLeft:
newX -= actualDistance;
newY += actualDistance;
break;
case MoveUpLeft:
newX -= actualDistance;
newY -= actualDistance;
break;
default:
kDebug()<<"Compound direction is not supported";
return;
}
if (direction() == QAbstractAnimation::Forward) {
m_targetPos = QPointF(newX, newY);
} else {
m_targetPos = m_startPos;
m_startPos = QPointF(newX, newY);
}
}
}
} //namespace Plasma