1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtDeclarative module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "private/qdeclarativeimagebase_p.h"

    43 #include "private/qdeclarativeimagebase_p_p.h"

    44 

    45 #include <qdeclarativeengine.h>

    46 #include <qdeclarativeinfo.h>

    47 #include <qdeclarativepixmapcache_p.h>

    48 

    49 #include <QFile>

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 QDeclarativeImageBase::QDeclarativeImageBase(QDeclarativeImageBasePrivate &dd, QDeclarativeItem *parent)

    54   : QDeclarativeItem(dd, parent)

    55 {

    56 }

    57 

    58 QDeclarativeImageBase::~QDeclarativeImageBase()

    59 {

    60     Q_D(QDeclarativeImageBase);

    61     if (d->pendingPixmapCache)

    62         QDeclarativePixmapCache::cancel(d->url, this);

    63 }

    64 

    65 QDeclarativeImageBase::Status QDeclarativeImageBase::status() const

    66 {

    67     Q_D(const QDeclarativeImageBase);

    68     return d->status;

    69 }

    70 

    71 

    72 qreal QDeclarativeImageBase::progress() const

    73 {

    74     Q_D(const QDeclarativeImageBase);

    75     return d->progress;

    76 }

    77 

    78 

    79 bool QDeclarativeImageBase::asynchronous() const

    80 {

    81     Q_D(const QDeclarativeImageBase);

    82     return d->async;

    83 }

    84 

    85 void QDeclarativeImageBase::setAsynchronous(bool async)

    86 {

    87     Q_D(QDeclarativeImageBase);

    88     if (d->async != async) {

    89         d->async = async;

    90         emit asynchronousChanged();

    91     }

    92 }

    93 

    94 

    95 QUrl QDeclarativeImageBase::source() const

    96 {

    97     Q_D(const QDeclarativeImageBase);

    98     return d->url;

    99 }

   100 

   101 void QDeclarativeImageBase::setSource(const QUrl &url)

   102 {

   103     Q_D(QDeclarativeImageBase);

   104     //equality is fairly expensive, so we bypass for simple, common case

   105     if ((d->url.isEmpty() == url.isEmpty()) && url == d->url)

   106         return;

   107 

   108     if (d->pendingPixmapCache) {

   109         QDeclarativePixmapCache::cancel(d->url, this);

   110         d->pendingPixmapCache = false;

   111     }

   112 

   113     d->url = url;

   114     emit sourceChanged(d->url);

   115 

   116     if (isComponentComplete())

   117         load();

   118 }

   119 

   120 void QDeclarativeImageBase::setSourceSize(const QSize& size)

   121 {

   122     Q_D(QDeclarativeImageBase);

   123     if (d->sourcesize == size)

   124         return;

   125     d->sourcesize = size;

   126     emit sourceSizeChanged();

   127     if (isComponentComplete())

   128         load();

   129 }

   130 

   131 QSize QDeclarativeImageBase::sourceSize() const

   132 {

   133     Q_D(const QDeclarativeImageBase);

   134     return d->sourcesize.isValid() ? d->sourcesize : QSize(implicitWidth(),implicitHeight());

   135 }

   136 

   137 void QDeclarativeImageBase::load()

   138 {

   139     Q_D(QDeclarativeImageBase);

   140     if (d->progress != 0.0) {

   141         d->progress = 0.0;

   142         emit progressChanged(d->progress);

   143     }

   144 

   145     if (d->url.isEmpty()) {

   146         d->pix = QPixmap();

   147         d->status = Null;

   148         setImplicitWidth(0);

   149         setImplicitHeight(0);

   150         emit statusChanged(d->status);

   151         pixmapChange();

   152         update();

   153     } else {

   154         d->status = Loading;

   155         int reqwidth = d->sourcesize.width();

   156         int reqheight = d->sourcesize.height();

   157         QSize impsize;

   158         QString errorString;

   159         QDeclarativePixmapReply::Status status = QDeclarativePixmapCache::get(d->url, &d->pix, &errorString, &impsize, d->async, reqwidth, reqheight);

   160         if (status != QDeclarativePixmapReply::Ready && status != QDeclarativePixmapReply::Error) {

   161             QDeclarativePixmapReply *reply = QDeclarativePixmapCache::request(qmlEngine(this), d->url, reqwidth, reqheight);

   162             d->pendingPixmapCache = true;

   163 

   164             static int replyDownloadProgress = -1;

   165             static int replyFinished = -1;

   166             static int thisRequestProgress = -1;

   167             static int thisRequestFinished = -1;

   168             if (replyDownloadProgress == -1) {

   169                 replyDownloadProgress =

   170                     QDeclarativePixmapReply::staticMetaObject.indexOfSignal("downloadProgress(qint64,qint64)");

   171                 replyFinished =

   172                     QDeclarativePixmapReply::staticMetaObject.indexOfSignal("finished()");

   173                 thisRequestProgress =

   174                     QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestProgress(qint64,qint64)");

   175                 thisRequestFinished =

   176                     QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestFinished()");

   177             }

   178 

   179             QMetaObject::connect(reply, replyFinished, this,

   180                                  thisRequestFinished, Qt::DirectConnection);

   181             QMetaObject::connect(reply, replyDownloadProgress, this,

   182                                  thisRequestProgress, Qt::DirectConnection);

   183         } else {

   184             //### should be unified with requestFinished

   185             if (status == QDeclarativePixmapReply::Ready) {

   186                 setImplicitWidth(impsize.width());

   187                 setImplicitHeight(impsize.height());

   188 

   189                 if (d->status == Loading)

   190                     d->status = Ready;

   191 

   192                 if (!d->sourcesize.isValid())

   193                     emit sourceSizeChanged();

   194             } else {

   195                 d->status = Error;

   196                 qmlInfo(this) << errorString;

   197             }

   198             d->progress = 1.0;

   199             emit statusChanged(d->status);

   200             emit progressChanged(d->progress);

   201             pixmapChange();

   202             update();

   203         }

   204     }

   205 

   206     emit statusChanged(d->status);

   207 }

   208 

   209 void QDeclarativeImageBase::requestFinished()

   210 {

   211     Q_D(QDeclarativeImageBase);

   212 

   213     d->pendingPixmapCache = false;

   214 

   215     QSize impsize;

   216     QString errorString;

   217     if (QDeclarativePixmapCache::get(d->url, &d->pix, &errorString, &impsize, d->async, d->sourcesize.width(), d->sourcesize.height()) != QDeclarativePixmapReply::Ready) {

   218         d->status = Error;

   219         qmlInfo(this) << errorString;

   220     }

   221     setImplicitWidth(impsize.width());

   222     setImplicitHeight(impsize.height());

   223 

   224     if (d->status == Loading)

   225         d->status = Ready;

   226     d->progress = 1.0;

   227     emit statusChanged(d->status);

   228     emit progressChanged(1.0);

   229     if (!d->sourcesize.isValid())

   230         emit sourceSizeChanged();

   231     pixmapChange();

   232     update();

   233 }

   234 

   235 void QDeclarativeImageBase::requestProgress(qint64 received, qint64 total)

   236 {

   237     Q_D(QDeclarativeImageBase);

   238     if (d->status == Loading && total > 0) {

   239         d->progress = qreal(received)/total;

   240         emit progressChanged(d->progress);

   241     }

   242 }

   243 

   244 void QDeclarativeImageBase::componentComplete()

   245 {

   246     Q_D(QDeclarativeImageBase);

   247     QDeclarativeItem::componentComplete();

   248     if (d->url.isValid())

   249         load();

   250 }

   251 

   252 void QDeclarativeImageBase::pixmapChange()

   253 {

   254 }

   255 

   256 QT_END_NAMESPACE