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Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativeimagebase.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qdeclarativeimagebase.cpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativeimagebase.cpp b/src/declarative/graphicsitems/qdeclarativeimagebase.cpp new file mode 100644 index 0000000..a8cce3f --- /dev/null +++ b/src/declarative/graphicsitems/qdeclarativeimagebase.cpp @@ -0,0 +1,221 @@ +/**************************************************************************** +** +** 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 "qdeclarativeimagebase_p.h" +#include "qdeclarativeimagebase_p_p.h" + +#include <qdeclarativeengine.h> +#include <qdeclarativepixmapcache_p.h> + +#include <QFile> + +QT_BEGIN_NAMESPACE + +QDeclarativeImageBase::QDeclarativeImageBase(QDeclarativeImageBasePrivate &dd, QDeclarativeItem *parent) + : QDeclarativeItem(dd, parent) +{ + setFlag(QGraphicsItem::ItemHasNoContents, false); +} + +QDeclarativeImageBase::~QDeclarativeImageBase() +{ + Q_D(QDeclarativeImageBase); + if (d->pendingPixmapCache) + QDeclarativePixmapCache::cancel(d->url, this); +} + +QDeclarativeImageBase::Status QDeclarativeImageBase::status() const +{ + Q_D(const QDeclarativeImageBase); + return d->status; +} + + +qreal QDeclarativeImageBase::progress() const +{ + Q_D(const QDeclarativeImageBase); + return d->progress; +} + + +bool QDeclarativeImageBase::asynchronous() const +{ + Q_D(const QDeclarativeImageBase); + return d->async; +} + +void QDeclarativeImageBase::setAsynchronous(bool async) +{ + Q_D(QDeclarativeImageBase); + if (d->async != async) { + d->async = async; + emit asynchronousChanged(); + } +} + + +QUrl QDeclarativeImageBase::source() const +{ + Q_D(const QDeclarativeImageBase); + return d->url; +} + +void QDeclarativeImageBase::setSource(const QUrl &url) +{ + Q_D(QDeclarativeImageBase); + //equality is fairly expensive, so we bypass for simple, common case + if ((d->url.isEmpty() == url.isEmpty()) && url == d->url) + return; + + if (d->pendingPixmapCache) { + QDeclarativePixmapCache::cancel(d->url, this); + d->pendingPixmapCache = false; + } + + d->url = url; + emit sourceChanged(d->url); + + if (isComponentComplete()) + load(); +} + +void QDeclarativeImageBase::load() +{ + Q_D(QDeclarativeImageBase); + if (d->progress != 0.0) { + d->progress = 0.0; + emit progressChanged(d->progress); + } + + if (d->url.isEmpty()) { + d->pix = QPixmap(); + d->status = Null; + setImplicitWidth(0); + setImplicitHeight(0); + emit statusChanged(d->status); + emit pixmapChanged(); + update(); + } else { + d->status = Loading; + QDeclarativePixmapReply::Status status = QDeclarativePixmapCache::get(d->url, &d->pix, d->async); + if (status != QDeclarativePixmapReply::Ready && status != QDeclarativePixmapReply::Error) { + QDeclarativePixmapReply *reply = QDeclarativePixmapCache::request(qmlEngine(this), d->url); + d->pendingPixmapCache = true; + + static int replyDownloadProgress = -1; + static int replyFinished = -1; + static int thisRequestProgress = -1; + static int thisRequestFinished = -1; + if (replyDownloadProgress == -1) { + replyDownloadProgress = + QDeclarativePixmapReply::staticMetaObject.indexOfSignal("downloadProgress(qint64,qint64)"); + replyFinished = + QDeclarativePixmapReply::staticMetaObject.indexOfSignal("finished()"); + thisRequestProgress = + QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestProgress(qint64,qint64)"); + thisRequestFinished = + QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestFinished()"); + } + + QMetaObject::connect(reply, replyFinished, this, + thisRequestFinished, Qt::DirectConnection); + QMetaObject::connect(reply, replyDownloadProgress, this, + thisRequestProgress, Qt::DirectConnection); + } else { + //### should be unified with requestFinished + if (status == QDeclarativePixmapReply::Ready) { + setImplicitWidth(d->pix.width()); + setImplicitHeight(d->pix.height()); + + if (d->status == Loading) + d->status = Ready; + } else { + d->status = Error; + } + d->progress = 1.0; + emit statusChanged(d->status); + emit progressChanged(d->progress); + emit pixmapChanged(); + update(); + } + } + + emit statusChanged(d->status); +} + +void QDeclarativeImageBase::requestFinished() +{ + Q_D(QDeclarativeImageBase); + + d->pendingPixmapCache = false; + + if (QDeclarativePixmapCache::get(d->url, &d->pix, d->async) != QDeclarativePixmapReply::Ready) + d->status = Error; + setImplicitWidth(d->pix.width()); + setImplicitHeight(d->pix.height()); + + if (d->status == Loading) + d->status = Ready; + d->progress = 1.0; + emit statusChanged(d->status); + emit progressChanged(1.0); + emit pixmapChanged(); + update(); +} + +void QDeclarativeImageBase::requestProgress(qint64 received, qint64 total) +{ + Q_D(QDeclarativeImageBase); + if (d->status == Loading && total > 0) { + d->progress = qreal(received)/total; + emit progressChanged(d->progress); + } +} + +void QDeclarativeImageBase::componentComplete() +{ + Q_D(QDeclarativeImageBase); + QDeclarativeItem::componentComplete(); + if (d->url.isValid()) + load(); +} + +QT_END_NAMESPACE |