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/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (directui@nokia.com)
**
** This file is part of libmeegotouch.
**
** If you have questions regarding the use of this file, please contact
** Nokia at directui@nokia.com.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation
** and appearing in the file LICENSE.LGPL included in the packaging
** of this file.
**
****************************************************************************/
#include "mbasiclayoutanimation_p.h"
#include "mlayout_p.h"
MBasicLayoutAnimationPrivate::MBasicLayoutAnimationPrivate()
{
recordedTimeSinceLastUpdate = 0;
}
MBasicLayoutAnimationPrivate::~MBasicLayoutAnimationPrivate()
{ }
void MBasicLayoutAnimationPrivate::tick()
{
Q_Q(MBasicLayoutAnimation);
recordedTimeSinceLastUpdate = timeSinceLastUpdate.elapsed();
timeSinceLastUpdate.restart();
bool layout_is_done(true);
for(int i = states.count() - 1; i >= 0; --i) {
MItemState &state = states[i];
if (state.isAnimationDone())
continue;
animate(state);
if (state.isAnimationDone()) {
if(state.isSet(MItemState::STATE_FLAG_TO_BE_DELETED))
q->layout()->removeAt(i);
} else {
layout_is_done = false;
}
}
if (layout_is_done)
q->stop();
}
void MBasicLayoutAnimationPrivate::animate(MItemState &item)
{
Q_Q(MBasicLayoutAnimation);
qreal delta_progress = recordedTimeSinceLastUpdate / q->style()->duration(); //Both times are in milliseconds
//First animate the geometry if needed
if (item.translateProgress() != 1) {
//animate the geometry
qreal new_geometry_progress = item.translateProgress() + delta_progress;
if (new_geometry_progress >= 1.0) {
item.setTransformProgress(1.0);
item.item()->setTransform( QTransform() );
} else {
item.setTransformProgress(new_geometry_progress);
qreal x_translation_animation_value = q->style()->xTranslationEasingCurve().valueForProgress(new_geometry_progress);
qreal y_translation_animation_value = q->style()->yTranslationEasingCurve().valueForProgress(new_geometry_progress);
qreal x_offset = item.sourceTranslate().x() * (1 - x_translation_animation_value);
qreal y_offset = item.sourceTranslate().y() * (1 - y_translation_animation_value);
item.item()->setTransform( QTransform::fromTranslate(x_offset, y_offset) );
}
}
//Then animate the opacity if needed
if (item.opacityProgress() != 1 && item.targetOpacity() != -1) { //-1 target opacity means to not animate anyway
//animate the opacity
qreal new_opacity_progress = qMin(item.opacityProgress() + delta_progress, (qreal)1.0); //between 0 and 1
item.setOpacityProgress(new_opacity_progress);
qreal opacity_animation_value = q->style()->opacityEasingCurve().valueForProgress(new_opacity_progress);
qreal current_opacity = item.item()->opacity();
if (current_opacity != -1) {
qreal new_opacity = item.sourceOpacity() + (item.targetOpacity() - item.sourceOpacity()) * opacity_animation_value;
new_opacity = qAbs(new_opacity); //make sure it is between 0 and 1
if (new_opacity > 1)
new_opacity = qMax((float)qAbs(2 - new_opacity), 1.0f);
item.item()->setOpacity(new_opacity);
}
}
//Have we finished with this item now?
if (item.opacityProgress() == 1 && item.translateProgress() == 1) {
if (item.isSet(MItemState::STATE_FLAG_TO_BE_HIDDEN)) {
if (item.targetOpacity() != -1)
item.item()->setOpacity(1); //Restore the opacity to 1, since we are hiding it now anyway
q->hideItemNow(item.item());
}
item.animationDone();
}
}
void MBasicLayoutAnimationPrivate::doItemHiddenAnimation(MItemState *itemstate)
{
Q_Q(MBasicLayoutAnimation);
Q_ASSERT(itemstate->item());
if (!q->style()->animateOpacity())
return;
QGraphicsItem *graphicsItem = itemstate->item()->graphicsItem();
if (graphicsItem) {
qreal finalOpacity = q->style()->finalHidingOpacity();
if (finalOpacity >= 0 && finalOpacity < 1) //If it ==1 there's no need to do anything
itemstate->setTargetOpacity(finalOpacity);
}
}
void MBasicLayoutAnimationPrivate::doItemShownAnimation(MItemState *itemstate)
{
Q_Q(MBasicLayoutAnimation);
Q_ASSERT(itemstate->item());
q->showItemNow(itemstate->item());
if (!q->style()->animateOpacity())
return;
QGraphicsItem *graphicsItem = itemstate->item()->graphicsItem();
if(!graphicsItem)
return;
if (itemstate->isSet(MItemState::STATE_FLAG_SHOWING)) {
//If the item is already visible, this can be called because we were currently doing a hide animation.
//So just make sure that we make everything visible
itemstate->setTargetOpacity(1);
graphicsItem->setOpacity(1);
return;
}
qreal initialOpacity = q->style()->initialShowingOpacity();
if (initialOpacity >= 0 && initialOpacity < 1) { //If it ==1 there's no need to do anything
graphicsItem->setOpacity(initialOpacity);
itemstate->setTargetOpacity(1);
}
}
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