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/***************************************************************************
* Copyright 2010 Stefan Majewsky <majewsky@gmx.net> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License *
* version 2 as published by the Free Software Foundation *
* *
* 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 Library 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 "board.h"
#include "spriteobjectitem.h"
#include <QBasicTimer>
#include <QTimerEvent>
#include <QApplication>
#include <QGraphicsScene>
struct Tagaro::Board::Private
{
Tagaro::Board* m_board;
Qt::Alignment m_alignment;
QSizeF m_logicalSize, m_size;
qreal m_physicalSizeFactor;
QPointF m_renderSizeFactor;
QList<Tagaro::SpriteObjectItem*> m_items;
QList<QGraphicsItem*> m_pendingItems;
QBasicTimer m_pendingItemsTimer;
void _k_update();
inline void update(Tagaro::SpriteObjectItem* item);
void _k_updateItem();
Private(Tagaro::Board* board) : m_board(board), m_alignment(Qt::AlignCenter), m_logicalSize(1, 1), m_size(1, 1), m_physicalSizeFactor(1), m_renderSizeFactor(1, 1) {}
};
Tagaro::Board::Board(QGraphicsItem* parent)
: QGraphicsObject(parent)
, d(new Private(this))
{
setFlag(QGraphicsItem::ItemHasNoContents); //so do not call paint()
if (parent)
{
d->_k_update();
}
}
Tagaro::Board::~Board()
{
delete d;
}
QSizeF Tagaro::Board::logicalSize() const
{
return d->m_logicalSize;
}
void Tagaro::Board::setLogicalSize(const QSizeF& size)
{
if (size.isValid() && d->m_logicalSize != size)
{
d->m_logicalSize = size;
d->_k_update();
}
}
QSizeF Tagaro::Board::size() const
{
return d->m_size;
}
void Tagaro::Board::setSize(const QSizeF& size)
{
if (size.isValid() && d->m_size != size)
{
d->m_size = size;
d->m_alignment = (Qt::Alignment) 0;
d->_k_update();
}
}
qreal Tagaro::Board::physicalSizeFactor() const
{
return d->m_physicalSizeFactor;
}
void Tagaro::Board::setPhysicalSizeFactor(qreal physicalSizeFactor)
{
if (physicalSizeFactor > 0.0 && d->m_physicalSizeFactor != physicalSizeFactor)
{
d->m_physicalSizeFactor = physicalSizeFactor;
d->_k_update();
}
}
Qt::Alignment Tagaro::Board::alignment() const
{
return d->m_alignment;
}
void Tagaro::Board::setAlignment(Qt::Alignment alignment)
{
//filter Qt::AlignJustify which is not interpreted by this class
static const Qt::Alignment respectedFlags = (Qt::Alignment) ((Qt::AlignHorizontal_Mask & ~Qt::AlignJustify) | Qt::AlignVertical_Mask);
alignment &= respectedFlags;
if (d->m_alignment != alignment)
{
d->m_alignment = alignment;
d->_k_update();
}
}
void Tagaro::Board::Private::_k_update()
{
//determine physical size
if (m_alignment)
{
//determine base rect (the rect into which we will be layouting)
QRectF baseRect;
QGraphicsItem* parentItem = m_board->parentItem();
if (parentItem)
{
baseRect = parentItem->boundingRect();
}
else
{
QGraphicsScene* scene = m_board->scene();
baseRect = scene ? scene->sceneRect() : QRectF(QPointF(), m_size);
}
//keep aspect ratio
const qreal scaleX = baseRect.width() / m_logicalSize.width();
const qreal scaleY = baseRect.height() / m_logicalSize.height();
m_size = qMin(scaleX, scaleY) * m_logicalSize;
QRectF physicalRect(baseRect.topLeft(), m_size);
//horizontal alignment (constructor of physicalRect aligns on left)
const bool hReverse = !(m_alignment & Qt::AlignAbsolute) && QApplication::isRightToLeft();
if (m_alignment & Qt::AlignHCenter)
{
const qreal dx = (baseRect.width() - m_size.width()) / 2;
physicalRect.translate(dx, 0);
}
else if (m_alignment & Qt::AlignRight || ((m_alignment & Qt::AlignLeft) && hReverse))
{
physicalRect.moveRight(baseRect.right());
}
//vertical alignment (constructor of physicalRect aligns on top)
if (m_alignment & Qt::AlignVCenter)
{
const qreal dy = (baseRect.height() - m_size.height()) / 2;
physicalRect.translate(0, dy);
}
else if (m_alignment & Qt::AlignBottom)
{
physicalRect.moveBottom(baseRect.bottom());
}
m_board->setPos(physicalRect.topLeft());
}
//update own transform and calculate renderSizeFactor
m_renderSizeFactor.setX(m_size.width() / m_logicalSize.width());
m_renderSizeFactor.setY(m_size.height() / m_logicalSize.height());
m_board->setTransform(QTransform::fromScale(m_renderSizeFactor.x(), m_renderSizeFactor.y()));
m_renderSizeFactor *= m_physicalSizeFactor;
//update items
QList<Tagaro::SpriteObjectItem*>::const_iterator it1 = m_items.constBegin(), it2 = m_items.constEnd();
for (; it1 != it2; ++it1)
update(*it1);
}
void Tagaro::Board::Private::_k_updateItem()
{
Tagaro::SpriteObjectItem* item = qobject_cast<Tagaro::SpriteObjectItem*>(m_board->sender());
if (item)
{
update(item);
}
}
void Tagaro::Board::Private::update(Tagaro::SpriteObjectItem* item)
{
QSizeF size = item->size();
size.rwidth() *= m_renderSizeFactor.x();
size.rheight() *= m_renderSizeFactor.y();
item->setRenderSize(size.toSize());
}
QRectF Tagaro::Board::boundingRect() const
{
return QRectF(QPointF(), d->m_size);
}
void Tagaro::Board::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
Q_UNUSED(painter) Q_UNUSED(option) Q_UNUSED(widget)
}
QVariant Tagaro::Board::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant& value)
{
if (change == ItemChildRemovedChange)
{
QGraphicsItem* item = value.value<QGraphicsItem*>();
d->m_pendingItems.removeAll(item);
QGraphicsObject* object = item->toGraphicsObject();
Tagaro::SpriteObjectItem* objectItem = qobject_cast<Tagaro::SpriteObjectItem*>(object);
if (objectItem)
{
disconnect(objectItem, 0, this, 0);
d->m_items.removeAll(objectItem);
}
}
else if (change == ItemChildAddedChange)
{
//check if this is a Tagaro::SpriteObjectItem
QGraphicsItem* item = value.value<QGraphicsItem*>();
QGraphicsObject* object = item->toGraphicsObject();
Tagaro::SpriteObjectItem* objectItem = qobject_cast<Tagaro::SpriteObjectItem*>(object);
if (objectItem)
{
d->m_items << objectItem;
connect(objectItem, SIGNAL(sizeChanged(QSizeF)), SLOT(_k_updateItem()));
d->update(objectItem);
}
//if we cannot cast to Tagaro::SpriteObjectItem, it might be that the item is
//not fully constructed -> check again later
if (item && (!object || (object && object->metaObject()->className() != QByteArray("QGraphicsObject"))))
{
d->m_pendingItems << item;
if (!d->m_pendingItemsTimer.isActive())
{
d->m_pendingItemsTimer.start(0, this);
}
}
}
else if (change == ItemSceneChange)
{
QGraphicsScene* scene = value.value<QGraphicsScene*>();
if (scene)
{
disconnect(scene, 0, this, 0);
}
}
else if (change == ItemSceneHasChanged)
{
QGraphicsScene* scene = value.value<QGraphicsScene*>();
if (scene)
{
d->_k_update();
connect(scene, SIGNAL(sceneRectChanged(QRectF)), this, SLOT(_k_update()));
}
}
return QGraphicsObject::itemChange(change, value);
}
void Tagaro::Board::timerEvent(QTimerEvent* event)
{
if (event->timerId() == d->m_pendingItemsTimer.timerId())
{
d->m_pendingItemsTimer.stop();
//process pending ItemChildAddedChanges
QList<QGraphicsItem*>::const_iterator it1 = d->m_pendingItems.constBegin(), it2 = d->m_pendingItems.constEnd();
for (; it1 != it2; ++it1)
{
QGraphicsItem* item = *it1;
QGraphicsObject* object = item->toGraphicsObject();
Tagaro::SpriteObjectItem* objectItem = qobject_cast<Tagaro::SpriteObjectItem*>(object);
if (objectItem)
{
d->m_items << objectItem;
connect(objectItem, SIGNAL(sizeChanged(QSizeF)), SLOT(_k_updateItem()));
d->update(objectItem);
}
}
d->m_pendingItems.clear();
}
else
{
QGraphicsObject::timerEvent(event);
}
}
#include "moc_board.cpp"
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