source: trunk/src/declarative/graphicsitems/qdeclarativeimagebase.cpp@ 1054

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** This file is part of the QtDeclarative module of the Qt Toolkit.
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** General Public License version 3.0 as published by the Free Software
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#include "private/qdeclarativeimagebase_p.h"
#include "private/qdeclarativeimagebase_p_p.h"

#include <qdeclarativeengine.h>
#include <qdeclarativeinfo.h>
#include <qdeclarativepixmapcache_p.h>

QT_BEGIN_NAMESPACE

QDeclarativeImageBase::QDeclarativeImageBase(QDeclarativeImageBasePrivate &dd, QDeclarativeItem *parent)
  : QDeclarativeItem(dd, parent)
{
}

QDeclarativeImageBase::~QDeclarativeImageBase()
{
}

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;

    d->url = url;
    emit sourceChanged(d->url);

    if (isComponentComplete())
        load();
}

void QDeclarativeImageBase::setSourceSize(const QSize& size)
{
    Q_D(QDeclarativeImageBase);
    if (d->sourcesize == size)
        return;

    d->sourcesize = size;
    d->explicitSourceSize = true;
    emit sourceSizeChanged();
    if (isComponentComplete())
        load();
}

QSize QDeclarativeImageBase::sourceSize() const
{
    Q_D(const QDeclarativeImageBase);

    int width = d->sourcesize.width();
    int height = d->sourcesize.height();
    return QSize(width != -1 ? width : implicitWidth(), height != -1 ? height : implicitHeight());
}

void QDeclarativeImageBase::load()
{
    Q_D(QDeclarativeImageBase);

    if (d->url.isEmpty()) {
        d->pix.clear();
        d->status = Null;
        d->progress = 0.0;
        setImplicitWidth(0);
        setImplicitHeight(0);
        emit progressChanged(d->progress);
        emit statusChanged(d->status);
        pixmapChange();
        update();
    } else {
        d->pix.load(qmlEngine(this), d->url, d->explicitSourceSize ? sourceSize() : QSize(), d->async);

        if (d->pix.isLoading()) {
            d->progress = 0.0;
            d->status = Loading;
            emit progressChanged(d->progress);
            emit statusChanged(d->status);

            static int thisRequestProgress = -1;
            static int thisRequestFinished = -1;
            if (thisRequestProgress == -1) {
                thisRequestProgress =
                    QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestProgress(qint64,qint64)");
                thisRequestFinished =
                    QDeclarativeImageBase::staticMetaObject.indexOfSlot("requestFinished()");
            }

            d->pix.connectFinished(this, thisRequestFinished);
            d->pix.connectDownloadProgress(this, thisRequestProgress);

        } else {
            requestFinished();
        }
    }
}

void QDeclarativeImageBase::requestFinished()
{
    Q_D(QDeclarativeImageBase);

    QDeclarativeImageBase::Status oldStatus = d->status;
    qreal oldProgress = d->progress;

    if (d->pix.isError()) {
        d->status = Error;
        qmlInfo(this) << d->pix.error();
    } else {
        d->status = Ready;
    }

    d->progress = 1.0;

    setImplicitWidth(d->pix.width());
    setImplicitHeight(d->pix.height());

    if (d->sourcesize.width() != d->pix.width() || d->sourcesize.height() != d->pix.height())
        emit sourceSizeChanged();

    if (d->status != oldStatus)
        emit statusChanged(d->status);
    if (d->progress != oldProgress)
        emit progressChanged(d->progress);
    pixmapChange();
    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();
}

void QDeclarativeImageBase::pixmapChange()
{
}

QT_END_NAMESPACE