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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used 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. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "subcomponentmasklayeritem_p.h"
#include "../qmlobserverconstants_p.h"
#include "../qdeclarativeviewobserver_p.h"
#include <QtGui/QPolygonF>
QT_BEGIN_NAMESPACE
SubcomponentMaskLayerItem::SubcomponentMaskLayerItem(QDeclarativeViewObserver *observer,
QGraphicsItem *parentItem) :
QGraphicsPolygonItem(parentItem),
m_observer(observer),
m_currentItem(0),
m_borderRect(new QGraphicsRectItem(this))
{
m_borderRect->setRect(0,0,0,0);
m_borderRect->setPen(QPen(QColor(60, 60, 60), 1));
m_borderRect->setData(Constants::EditorItemDataKey, QVariant(true));
setBrush(QBrush(QColor(160,160,160)));
setPen(Qt::NoPen);
}
int SubcomponentMaskLayerItem::type() const
{
return Constants::EditorItemType;
}
static QRectF resizeRect(const QRectF &newRect, const QRectF &oldRect)
{
QRectF result = newRect;
if (oldRect.left() < newRect.left())
result.setLeft(oldRect.left());
if (oldRect.top() < newRect.top())
result.setTop(oldRect.top());
if (oldRect.right() > newRect.right())
result.setRight(oldRect.right());
if (oldRect.bottom() > newRect.bottom())
result.setBottom(oldRect.bottom());
return result;
}
static QPolygonF regionToPolygon(const QRegion ®ion)
{
QPainterPath path;
foreach (const QRect &rect, region.rects())
path.addRect(rect);
return path.toFillPolygon();
}
void SubcomponentMaskLayerItem::setCurrentItem(QGraphicsItem *item)
{
QGraphicsItem *prevItem = m_currentItem;
m_currentItem = item;
if (!m_currentItem)
return;
QRect viewRect = m_observer->declarativeView()->rect();
viewRect = m_observer->declarativeView()->mapToScene(viewRect).boundingRect().toRect();
QRectF itemRect = item->boundingRect() | item->childrenBoundingRect();
itemRect = item->mapRectToScene(itemRect);
// if updating the same item as before, resize the rectangle only bigger, not smaller.
if (prevItem == item && prevItem != 0) {
m_itemPolyRect = resizeRect(itemRect, m_itemPolyRect);
} else {
m_itemPolyRect = itemRect;
}
QRectF borderRect = m_itemPolyRect;
borderRect.adjust(-1, -1, 1, 1);
m_borderRect->setRect(borderRect);
const QRegion externalRegion = QRegion(viewRect).subtracted(m_itemPolyRect.toRect());
setPolygon(regionToPolygon(externalRegion));
}
QGraphicsItem *SubcomponentMaskLayerItem::currentItem() const
{
return m_currentItem;
}
QT_END_NAMESPACE
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