qdeclarativeborderimage.cpp

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** This file is part of the QtDeclarative module of the Qt Toolkit.
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#include "private/qdeclarativeborderimage_p.h"
#include "private/qdeclarativeborderimage_p_p.h"

#include <qdeclarativeinfo.h>
#include <private/qdeclarativeengine_p.h>

#include <QNetworkRequest>
#include <QNetworkReply>
#include <QFile>

QT_BEGIN_NAMESPACE

QDeclarativeBorderImage::QDeclarativeBorderImage(QDeclarativeItem *parent)
  : QDeclarativeImageBase(*(new QDeclarativeBorderImagePrivate), parent)
{
}

QDeclarativeBorderImage::~QDeclarativeBorderImage()
{
    Q_D(QDeclarativeBorderImage);
    if (d->sciReply)
        d->sciReply->deleteLater();
}
void QDeclarativeBorderImage::setSource(const QUrl &url)
{
    Q_D(QDeclarativeBorderImage);
    //equality is fairly expensive, so we bypass for simple, common case
    if ((d->url.isEmpty() == url.isEmpty()) && url == d->url)
        return;

    if (d->sciReply) {
        d->sciReply->deleteLater();
        d->sciReply = 0;
    }

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

    if (isComponentComplete())
        load();
}

void QDeclarativeBorderImage::setSourceSize(const QSize& size)
{
    Q_UNUSED(size);
    qmlInfo(this) << "Setting sourceSize for borderImage not supported";
}

void QDeclarativeBorderImage::load()
{
    Q_D(QDeclarativeBorderImage);
    if (d->progress != 0.0) {
        d->progress = 0.0;
        emit progressChanged(d->progress);
    }

    if (d->url.isEmpty()) {
        d->pix.clear(this);
        d->status = Null;
        setImplicitWidth(0);
        setImplicitHeight(0);
        emit statusChanged(d->status);
        update();
    } else {
        d->status = Loading;
        if (d->url.path().endsWith(QLatin1String("sci"))) {
#ifndef QT_NO_LOCALFILE_OPTIMIZED_QML
            QString lf = QDeclarativeEnginePrivate::urlToLocalFileOrQrc(d->url);
            if (!lf.isEmpty()) {
                QFile file(lf);
                file.open(QIODevice::ReadOnly);
                setGridScaledImage(QDeclarativeGridScaledImage(&file));
            } else
#endif
            {
                QNetworkRequest req(d->url);
                d->sciReply = qmlEngine(this)->networkAccessManager()->get(req);

                static int sciReplyFinished = -1;
                static int thisSciRequestFinished = -1;
                if (sciReplyFinished == -1) {
                    sciReplyFinished =
                        QNetworkReply::staticMetaObject.indexOfSignal("finished()");
                    thisSciRequestFinished =
                        QDeclarativeBorderImage::staticMetaObject.indexOfSlot("sciRequestFinished()");
                }

                QMetaObject::connect(d->sciReply, sciReplyFinished, this,
                                     thisSciRequestFinished, Qt::DirectConnection);
            }
        } else {

            QDeclarativePixmap::Options options;
            if (d->async)
                options |= QDeclarativePixmap::Asynchronous;
            if (d->cache)
                options |= QDeclarativePixmap::Cache;
            d->pix.clear(this);
            d->pix.load(qmlEngine(this), d->url, options);

            if (d->pix.isLoading()) {
                d->pix.connectFinished(this, SLOT(requestFinished()));
                d->pix.connectDownloadProgress(this, SLOT(requestProgress(qint64,qint64)));
            } else {
                QSize impsize = d->pix.implicitSize();
                setImplicitWidth(impsize.width());
                setImplicitHeight(impsize.height());

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

                d->progress = 1.0;
                emit statusChanged(d->status);
                emit progressChanged(d->progress);
                requestFinished();
                update();
            }
        }
    }

    emit statusChanged(d->status);
}

QDeclarativeScaleGrid *QDeclarativeBorderImage::border()
{
    Q_D(QDeclarativeBorderImage);
    return d->getScaleGrid();
}

QDeclarativeBorderImage::TileMode QDeclarativeBorderImage::horizontalTileMode() const
{
    Q_D(const QDeclarativeBorderImage);
    return d->horizontalTileMode;
}

void QDeclarativeBorderImage::setHorizontalTileMode(TileMode t)
{
    Q_D(QDeclarativeBorderImage);
    if (t != d->horizontalTileMode) {
        d->horizontalTileMode = t;
        emit horizontalTileModeChanged();
        update();
    }
}

QDeclarativeBorderImage::TileMode QDeclarativeBorderImage::verticalTileMode() const
{
    Q_D(const QDeclarativeBorderImage);
    return d->verticalTileMode;
}

void QDeclarativeBorderImage::setVerticalTileMode(TileMode t)
{
    Q_D(QDeclarativeBorderImage);
    if (t != d->verticalTileMode) {
        d->verticalTileMode = t;
        emit verticalTileModeChanged();
        update();
    }
}

void QDeclarativeBorderImage::setGridScaledImage(const QDeclarativeGridScaledImage& sci)
{
    Q_D(QDeclarativeBorderImage);
    if (!sci.isValid()) {
        d->status = Error;
        emit statusChanged(d->status);
    } else {
        QDeclarativeScaleGrid *sg = border();
        sg->setTop(sci.gridTop());
        sg->setBottom(sci.gridBottom());
        sg->setLeft(sci.gridLeft());
        sg->setRight(sci.gridRight());
        d->horizontalTileMode = sci.horizontalTileRule();
        d->verticalTileMode = sci.verticalTileRule();

        d->sciurl = d->url.resolved(QUrl(sci.pixmapUrl()));

        QDeclarativePixmap::Options options;
        if (d->async)
            options |= QDeclarativePixmap::Asynchronous;
        if (d->cache)
            options |= QDeclarativePixmap::Cache;
        d->pix.clear(this);
        d->pix.load(qmlEngine(this), d->sciurl, options);

        if (d->pix.isLoading()) {
            static int thisRequestProgress = -1;
            static int thisRequestFinished = -1;
            if (thisRequestProgress == -1) {
                thisRequestProgress =
                    QDeclarativeBorderImage::staticMetaObject.indexOfSlot("requestProgress(qint64,qint64)");
                thisRequestFinished =
                    QDeclarativeBorderImage::staticMetaObject.indexOfSlot("requestFinished()");
            }

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

        } else {

            QSize impsize = d->pix.implicitSize();
            setImplicitWidth(impsize.width());
            setImplicitHeight(impsize.height());

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

            d->progress = 1.0;
            emit statusChanged(d->status);
            emit progressChanged(1.0);
            update();

        }
    }
}

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

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

    setImplicitWidth(impsize.width());
    setImplicitHeight(impsize.height());

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

    d->progress = 1.0;
    emit statusChanged(d->status);
    emit progressChanged(1.0);
    update();
}

#define BORDERIMAGE_MAX_REDIRECT 16

void QDeclarativeBorderImage::sciRequestFinished()
{
    Q_D(QDeclarativeBorderImage);

    d->redirectCount++;
    if (d->redirectCount < BORDERIMAGE_MAX_REDIRECT) {
        QVariant redirect = d->sciReply->attribute(QNetworkRequest::RedirectionTargetAttribute);
        if (redirect.isValid()) {
            QUrl url = d->sciReply->url().resolved(redirect.toUrl());
            setSource(url);
            return;
        }
    }
    d->redirectCount=0;

    if (d->sciReply->error() != QNetworkReply::NoError) {
        d->status = Error;
        d->sciReply->deleteLater();
        d->sciReply = 0;
        emit statusChanged(d->status);
    } else {
        QDeclarativeGridScaledImage sci(d->sciReply);
        d->sciReply->deleteLater();
        d->sciReply = 0;
        setGridScaledImage(sci);
    }
}

void QDeclarativeBorderImage::doUpdate()
{
    update();
}

void QDeclarativeBorderImage::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *)
{
    Q_D(QDeclarativeBorderImage);
    if (d->pix.isNull() || d->width() <= 0.0 || d->height() <= 0.0)
        return;

    bool oldAA = p->testRenderHint(QPainter::Antialiasing);
    bool oldSmooth = p->testRenderHint(QPainter::SmoothPixmapTransform);
    QTransform oldTransform;
    if (d->smooth)
        p->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform, d->smooth);
    if (d->mirror) {
        oldTransform = p->transform();
        QTransform mirror;
        mirror.translate(d->width(), 0).scale(-1, 1.0);
        p->setWorldTransform(mirror * oldTransform);
    }

    const QDeclarativeScaleGrid *border = d->getScaleGrid();
    int left = border->left();
    int right = border->right();
    qreal borderWidth = left + right;
    if (borderWidth > 0.0 && d->width() < borderWidth) {
        qreal diff = borderWidth - d->width() - 1;
        left -= qRound(diff * qreal(left) / borderWidth);
        right -= qRound(diff * qreal(right) / borderWidth);
    }
    int top = border->top();
    int bottom = border->bottom();
    qreal borderHeight = top + bottom;
    if (borderHeight > 0.0 && d->height() < borderHeight) {
        qreal diff = borderHeight - d->height() - 1;
        top -= qRound(diff * qreal(top) / borderHeight);
        bottom -= qRound(diff * qreal(bottom) / borderHeight);
    }
    QMargins margins(left, top, right, bottom);
    QTileRules rules((Qt::TileRule)d->horizontalTileMode, (Qt::TileRule)d->verticalTileMode);
    qDrawBorderPixmap(p, QRect(0, 0, (int)d->width(), (int)d->height()), margins, d->pix, d->pix.rect(), margins, rules);
    if (d->smooth) {
        p->setRenderHint(QPainter::Antialiasing, oldAA);
        p->setRenderHint(QPainter::SmoothPixmapTransform, oldSmooth);
    }
    if (d->mirror)
        p->setWorldTransform(oldTransform);
}

QT_END_NAMESPACE