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Diffstat (limited to 'src/declarative/graphicsitems/qmlgraphicspainteditem.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qmlgraphicspainteditem.cpp | 466 |
1 files changed, 0 insertions, 466 deletions
diff --git a/src/declarative/graphicsitems/qmlgraphicspainteditem.cpp b/src/declarative/graphicsitems/qmlgraphicspainteditem.cpp deleted file mode 100644 index 3daa0c6..0000000 --- a/src/declarative/graphicsitems/qmlgraphicspainteditem.cpp +++ /dev/null @@ -1,466 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, 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. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qmlgraphicspainteditem_p.h" -#include "qmlgraphicspainteditem_p_p.h" - -#include <QDebug> -#include <QPen> -#include <QFile> -#include <QEvent> -#include <QApplication> -#include <QGraphicsSceneMouseEvent> -#include <QPainter> -#include <QPaintEngine> -#include <qmath.h> - -QT_BEGIN_NAMESPACE - -/*! - \class QmlGraphicsPaintedItem - \brief The QmlGraphicsPaintedItem class is an abstract base class for QmlView items that want cached painting. - \internal - - This is a convenience class for implementing items that paint their contents - using a QPainter. The contents of the item are cached behind the scenes. - The dirtyCache() function should be called if the contents change to - ensure the cache is refreshed the next time painting occurs. - - To subclass QmlGraphicsPaintedItem, you must reimplement drawContents() to draw - the contents of the item. -*/ - -/*! - \fn void QmlGraphicsPaintedItem::drawContents(QPainter *painter, const QRect &rect) - - This function is called when the cache needs to be refreshed. When - sub-classing QmlGraphicsPaintedItem this function should be implemented so as to - paint the contents of the item using the given \a painter for the - area of the contents specified by \a rect. -*/ - -/*! - \property QmlGraphicsPaintedItem::contentsSize - \brief The size of the contents - - The contents size is the size of the item in regards to how it is painted - using the drawContents() function. This is distinct from the size of the - item in regards to height() and width(). -*/ - -// XXX bug in WebKit - can call repaintRequested and other cache-changing functions from within render! -static int inpaint=0; -static int inpaint_clearcache=0; - -/*! - Marks areas of the cache that intersect with the given \a rect as dirty and - in need of being refreshed. - - \sa clearCache() -*/ -void QmlGraphicsPaintedItem::dirtyCache(const QRect& rect) -{ - Q_D(QmlGraphicsPaintedItem); - QRect srect(qCeil(rect.x()*d->contentsScale), - qCeil(rect.y()*d->contentsScale), - qCeil(rect.width()*d->contentsScale), - qCeil(rect.height()*d->contentsScale)); - for (int i=0; i < d->imagecache.count(); ) { - QmlGraphicsPaintedItemPrivate::ImageCacheItem *c = d->imagecache[i]; - QRect isect = (c->area & srect) | c->dirty; - if (isect == c->area && !inpaint) { - delete d->imagecache.takeAt(i); - } else { - c->dirty = isect; - ++i; - } - } -} - -/*! - Marks the entirety of the contents cache as dirty. - - \sa dirtyCache() -*/ -void QmlGraphicsPaintedItem::clearCache() -{ - if (inpaint) { - inpaint_clearcache=1; - return; - } - Q_D(QmlGraphicsPaintedItem); - qDeleteAll(d->imagecache); - d->imagecache.clear(); -} - -/*! - Returns the size of the contents. - - \sa setContentsSize() -*/ -QSize QmlGraphicsPaintedItem::contentsSize() const -{ - Q_D(const QmlGraphicsPaintedItem); - return d->contentsSize; -} - -/*! - Sets the size of the contents to the given \a size. - - \sa contentsSize() -*/ -void QmlGraphicsPaintedItem::setContentsSize(const QSize &size) -{ - Q_D(QmlGraphicsPaintedItem); - if (d->contentsSize == size) return; - d->contentsSize = size; - setImplicitWidth(size.width()*d->contentsScale); - setImplicitHeight(size.height()*d->contentsScale); - clearCache(); - update(); - emit contentsSizeChanged(); -} - -qreal QmlGraphicsPaintedItem::contentsScale() const -{ - Q_D(const QmlGraphicsPaintedItem); - return d->contentsScale; -} - -void QmlGraphicsPaintedItem::setContentsScale(qreal scale) -{ - Q_D(QmlGraphicsPaintedItem); - if (d->contentsScale == scale) return; - d->contentsScale = scale; - setImplicitWidth(d->contentsSize.width()*scale); - setImplicitHeight(d->contentsSize.height()*scale); - clearCache(); - update(); - emit contentsScaleChanged(); -} - - -/*! - Constructs a new QmlGraphicsPaintedItem with the given \a parent. -*/ -QmlGraphicsPaintedItem::QmlGraphicsPaintedItem(QmlGraphicsItem *parent) - : QmlGraphicsItem(*(new QmlGraphicsPaintedItemPrivate), parent) -{ - init(); -} - -/*! - \internal - Constructs a new QmlGraphicsPaintedItem with the given \a parent and - initialized private data member \a dd. -*/ -QmlGraphicsPaintedItem::QmlGraphicsPaintedItem(QmlGraphicsPaintedItemPrivate &dd, QmlGraphicsItem *parent) - : QmlGraphicsItem(dd, parent) -{ - init(); -} - -/*! - Destroys the image item. -*/ -QmlGraphicsPaintedItem::~QmlGraphicsPaintedItem() -{ - clearCache(); -} - -/*! - \internal -*/ -void QmlGraphicsPaintedItem::init() -{ - connect(this,SIGNAL(widthChanged()),this,SLOT(clearCache())); - connect(this,SIGNAL(heightChanged()),this,SLOT(clearCache())); - connect(this,SIGNAL(visibleChanged()),this,SLOT(clearCache())); -} - -void QmlGraphicsPaintedItem::setCacheFrozen(bool frozen) -{ - Q_D(QmlGraphicsPaintedItem); - if (d->cachefrozen == frozen) - return; - d->cachefrozen = frozen; - // XXX clear cache? -} - -/*! - \reimp -*/ -void QmlGraphicsPaintedItem::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *) -{ - Q_D(QmlGraphicsPaintedItem); - const QRect content(0,0,qCeil(d->contentsSize.width()*d->contentsScale), - qCeil(d->contentsSize.height()*d->contentsScale)); - if (content.width() <= 0 || content.height() <= 0) - return; - - ++inpaint; - - const QTransform &x = p->deviceTransform(); - QTransform xinv = x.inverted(); - QRegion effectiveClip; - QRegion sysClip = p->paintEngine()->systemClip(); - if (xinv.type() <= QTransform::TxScale && sysClip.numRects() < 5) { - // simple transform, region gets no more complicated... - effectiveClip = xinv.map(sysClip); - } else { - // do not make complicated regions... - effectiveClip = xinv.mapRect(sysClip.boundingRect()); - } - - QRegion topaint = p->clipRegion(); - if (topaint.isEmpty()) { - if (effectiveClip.isEmpty()) - topaint = QRect(0,0,p->device()->width(),p->device()->height()); - else - topaint = effectiveClip; - } else if (!effectiveClip.isEmpty()) { - topaint &= effectiveClip; - } - - topaint &= content; - QRegion uncached(content); - p->setRenderHints(QPainter::SmoothPixmapTransform, d->smooth); - - int cachesize=0; - for (int i=0; i<d->imagecache.count(); ++i) { - QRect area = d->imagecache[i]->area; - if (topaint.contains(area)) { - QRectF target(area.x(), area.y(), area.width(), area.height()); - if (!d->cachefrozen) { - if (!d->imagecache[i]->dirty.isNull() && topaint.contains(d->imagecache[i]->dirty)) { - QPainter qp(&d->imagecache[i]->image); - qp.setRenderHints(QPainter::HighQualityAntialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform, d->smoothCache); - qp.translate(-area.x(), -area.y()); - qp.scale(d->contentsScale,d->contentsScale); - QRect clip = d->imagecache[i]->dirty; - QRect sclip(qFloor(clip.x()/d->contentsScale), - qFloor(clip.y()/d->contentsScale), - qCeil(clip.width()/d->contentsScale+clip.x()/d->contentsScale-qFloor(clip.x()/d->contentsScale)), - qCeil(clip.height()/d->contentsScale+clip.y()/d->contentsScale-qFloor(clip.y()/d->contentsScale))); - qp.setClipRect(sclip); - if (d->fillColor.isValid()){ - if(d->fillColor.alpha() < 255){ - // ### Might not work outside of raster paintengine - QPainter::CompositionMode prev = qp.compositionMode(); - qp.setCompositionMode(QPainter::CompositionMode_Source); - qp.fillRect(sclip,d->fillColor); - qp.setCompositionMode(prev); - }else{ - qp.fillRect(sclip,d->fillColor); - } - } - drawContents(&qp, sclip); - d->imagecache[i]->dirty = QRect(); - } - } - p->drawPixmap(target.toRect(), d->imagecache[i]->image); - topaint -= area; - d->imagecache[i]->age=0; - } else { - d->imagecache[i]->age++; - } - cachesize += area.width()*area.height(); - uncached -= area; - } - - if (!topaint.isEmpty()) { - if (!d->cachefrozen) { - // Find a sensible larger area, otherwise will paint lots of tiny images. - QRect biggerrect = topaint.boundingRect().adjusted(-64,-64,128,128); - cachesize += biggerrect.width() * biggerrect.height(); - while (d->imagecache.count() && cachesize > d->max_imagecache_size) { - int oldest=-1; - int age=-1; - for (int i=0; i<d->imagecache.count(); ++i) { - int a = d->imagecache[i]->age; - if (a > age) { - oldest = i; - age = a; - } - } - cachesize -= d->imagecache[oldest]->area.width()*d->imagecache[oldest]->area.height(); - uncached += d->imagecache[oldest]->area; - delete d->imagecache.takeAt(oldest); - } - const QRegion bigger = QRegion(biggerrect) & uncached; - const QVector<QRect> rects = bigger.rects(); - for (int i = 0; i < rects.count(); ++i) { - const QRect &r = rects.at(i); - QPixmap img(r.size()); - if (d->fillColor.isValid()) - img.fill(d->fillColor); - { - QPainter qp(&img); - qp.setRenderHints(QPainter::HighQualityAntialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform, d->smoothCache); - - qp.translate(-r.x(),-r.y()); - qp.scale(d->contentsScale,d->contentsScale); - QRect sclip(qFloor(r.x()/d->contentsScale), - qFloor(r.y()/d->contentsScale), - qCeil(r.width()/d->contentsScale+r.x()/d->contentsScale-qFloor(r.x()/d->contentsScale)), - qCeil(r.height()/d->contentsScale+r.y()/d->contentsScale-qFloor(r.y()/d->contentsScale))); - drawContents(&qp, sclip); - } - QmlGraphicsPaintedItemPrivate::ImageCacheItem *newitem = new QmlGraphicsPaintedItemPrivate::ImageCacheItem; - newitem->area = r; - newitem->image = img; - d->imagecache.append(newitem); - p->drawPixmap(r, newitem->image); - } - } else { - const QVector<QRect> rects = uncached.rects(); - for (int i = 0; i < rects.count(); ++i) - p->fillRect(rects.at(i), Qt::lightGray); - } - } - - if (inpaint_clearcache) { - clearCache(); - inpaint_clearcache = 0; - } - - --inpaint; -} - -/*! - \qmlproperty int PaintedItem::pixelCacheSize - - This property holds the maximum number of pixels of image cache to - allow. The default is 0.1 megapixels. The cache will not be larger - than the (unscaled) size of the WebView. -*/ -/*! - \property QmlGraphicsPaintedItem::pixelCacheSize - - The maximum number of pixels of image cache to allow. The default - is 0.1 megapixels. The cache will not be larger than the (unscaled) - size of the QmlGraphicsPaintedItem. -*/ -int QmlGraphicsPaintedItem::pixelCacheSize() const -{ - Q_D(const QmlGraphicsPaintedItem); - return d->max_imagecache_size; -} - -void QmlGraphicsPaintedItem::setPixelCacheSize(int pixels) -{ - Q_D(QmlGraphicsPaintedItem); - if (pixels < d->max_imagecache_size) { - int cachesize=0; - for (int i=0; i<d->imagecache.count(); ++i) { - QRect area = d->imagecache[i]->area; - cachesize += area.width()*area.height(); - } - while (d->imagecache.count() && cachesize > pixels) { - int oldest=-1; - int age=-1; - for (int i=0; i<d->imagecache.count(); ++i) { - int a = d->imagecache[i]->age; - if (a > age) { - oldest = i; - age = a; - } - } - cachesize -= d->imagecache[oldest]->area.width()*d->imagecache[oldest]->area.height(); - delete d->imagecache.takeAt(oldest); - } - } - d->max_imagecache_size = pixels; -} - - - -/*! - \property QmlGraphicsPaintedItem::fillColor - - The color to be used to fill the item prior to calling drawContents(). - By default, this is Qt::transparent. - - Performance improvements can be achieved if subclasses call this with either an - invalid color (QColor()), or an appropriate solid color. -*/ -void QmlGraphicsPaintedItem::setFillColor(const QColor& c) -{ - Q_D(QmlGraphicsPaintedItem); - if (d->fillColor == c) - return; - d->fillColor = c; - emit fillColorChanged(); - update(); -} - -QColor QmlGraphicsPaintedItem::fillColor() const -{ - Q_D(const QmlGraphicsPaintedItem); - return d->fillColor; -} - -/*! - \qmlproperty bool PaintedItem::smoothCache - - Controls whether the cached tiles of which the item is composed are - rendered smoothly when they are generated. - - This is in addition toe Item::smooth, which controls the smooth painting of - the already-painted cached tiles under transformation. -*/ -bool QmlGraphicsPaintedItem::smoothCache() const -{ - Q_D(const QmlGraphicsPaintedItem); - return d->smoothCache; -} - -void QmlGraphicsPaintedItem::setSmoothCache(bool on) -{ - Q_D(QmlGraphicsPaintedItem); - if (d->smoothCache != on) { - d->smoothCache = on; - clearCache(); - } -} - - -QT_END_NAMESPACE |