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/***************************************************************************
* Copyright (C) 2011 by Peter Penz <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, 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 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 "kitemlistviewanimation.h"
#include <kitemviews/kitemlistview.h>
#include <QGraphicsWidget>
#include <QPropertyAnimation>
KItemListViewAnimation::KItemListViewAnimation(QObject* parent) :
QObject(parent),
m_scrollOrientation(Qt::Vertical),
m_scrollOffset(0),
m_animation()
{
}
KItemListViewAnimation::~KItemListViewAnimation()
{
for (int type = 0; type < AnimationTypeCount; ++type) {
qDeleteAll(m_animation[type]);
}
}
void KItemListViewAnimation::setScrollOrientation(Qt::Orientation orientation)
{
m_scrollOrientation = orientation;
}
Qt::Orientation KItemListViewAnimation::scrollOrientation() const
{
return m_scrollOrientation;
}
void KItemListViewAnimation::setScrollOffset(qreal offset)
{
const qreal diff = m_scrollOffset - offset;
m_scrollOffset = offset;
// The change of the offset requires that the position of all
// animated QGraphicsWidgets get adjusted. An exception is made
// for the delete animation that should just fade away on the
// existing position.
for (int type = 0; type < AnimationTypeCount; ++type) {
if (type == DeleteAnimation) {
continue;
}
QHashIterator<QGraphicsWidget*, QPropertyAnimation*> it(m_animation[type]);
while (it.hasNext()) {
it.next();
QGraphicsWidget* widget = it.key();
QPropertyAnimation* propertyAnim = it.value();
QPointF currentPos = widget->pos();
if (m_scrollOrientation == Qt::Vertical) {
currentPos.ry() += diff;
} else {
currentPos.rx() += diff;
}
if (type == MovingAnimation) {
// Stop the animation, calculate the moved start- and end-value
// and restart the animation for the remaining duration.
const int remainingDuration = propertyAnim->duration()
- propertyAnim->currentTime();
const bool block = propertyAnim->signalsBlocked();
propertyAnim->blockSignals(true);
propertyAnim->stop();
QPointF endPos = propertyAnim->endValue().toPointF();
if (m_scrollOrientation == Qt::Vertical) {
endPos.ry() += diff;
} else {
endPos.rx() += diff;
}
propertyAnim->setDuration(remainingDuration);
propertyAnim->setStartValue(currentPos);
propertyAnim->setEndValue(endPos);
propertyAnim->start();
propertyAnim->blockSignals(block);
} else {
widget->setPos(currentPos);
}
}
}
}
qreal KItemListViewAnimation::scrollOffset() const
{
return m_scrollOffset;
}
void KItemListViewAnimation::start(QGraphicsWidget* widget, AnimationType type, const QVariant& endValue)
{
stop(widget, type);
QPropertyAnimation* propertyAnim = 0;
const int animationDuration = widget->style()->styleHint(QStyle::SH_Widget_Animate) ? 200 : 1;
switch (type) {
case MovingAnimation: {
const QPointF newPos = endValue.toPointF();
if (newPos == widget->pos()) {
return;
}
propertyAnim = new QPropertyAnimation(widget, "pos");
propertyAnim->setDuration(animationDuration);
propertyAnim->setEndValue(newPos);
break;
}
case CreateAnimation: {
propertyAnim = new QPropertyAnimation(widget, "opacity");
propertyAnim->setEasingCurve(QEasingCurve::InQuart);
propertyAnim->setDuration(animationDuration);
propertyAnim->setStartValue(0.0);
propertyAnim->setEndValue(1.0);
break;
}
case DeleteAnimation: {
propertyAnim = new QPropertyAnimation(widget, "opacity");
propertyAnim->setEasingCurve(QEasingCurve::OutQuart);
propertyAnim->setDuration(animationDuration);
propertyAnim->setStartValue(1.0);
propertyAnim->setEndValue(0.0);
break;
}
case ResizeAnimation: {
const QSizeF newSize = endValue.toSizeF();
if (newSize == widget->size()) {
return;
}
propertyAnim = new QPropertyAnimation(widget, "size");
propertyAnim->setDuration(animationDuration);
propertyAnim->setEndValue(newSize);
break;
}
default:
break;
}
Q_ASSERT(propertyAnim);
connect(propertyAnim, &QPropertyAnimation::finished, this, &KItemListViewAnimation::slotFinished);
m_animation[type].insert(widget, propertyAnim);
propertyAnim->start();
}
void KItemListViewAnimation::stop(QGraphicsWidget* widget, AnimationType type)
{
QPropertyAnimation* propertyAnim = m_animation[type].value(widget);
if (propertyAnim) {
propertyAnim->stop();
switch (type) {
case MovingAnimation: break;
case CreateAnimation: widget->setOpacity(1.0); break;
case DeleteAnimation: widget->setOpacity(0.0); break;
case ResizeAnimation: break;
default: break;
}
m_animation[type].remove(widget);
delete propertyAnim;
emit finished(widget, type);
}
}
void KItemListViewAnimation::stop(QGraphicsWidget* widget)
{
for (int type = 0; type < AnimationTypeCount; ++type) {
stop(widget, static_cast<AnimationType>(type));
}
}
bool KItemListViewAnimation::isStarted(QGraphicsWidget *widget, AnimationType type) const
{
return m_animation[type].value(widget);
}
bool KItemListViewAnimation::isStarted(QGraphicsWidget* widget) const
{
for (int type = 0; type < AnimationTypeCount; ++type) {
if (isStarted(widget, static_cast<AnimationType>(type))) {
return true;
}
}
return false;
}
void KItemListViewAnimation::slotFinished()
{
QPropertyAnimation* finishedAnim = qobject_cast<QPropertyAnimation*>(sender());
for (int type = 0; type < AnimationTypeCount; ++type) {
QMutableHashIterator<QGraphicsWidget*, QPropertyAnimation*> it(m_animation[type]);
while (it.hasNext()) {
it.next();
QPropertyAnimation* propertyAnim = it.value();
if (propertyAnim == finishedAnim) {
QGraphicsWidget* widget = it.key();
it.remove();
finishedAnim->deleteLater();
emit finished(widget, static_cast<AnimationType>(type));
return;
}
}
}
Q_ASSERT(false);
}
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