/****************************************************************************

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** This file is part of the QtGui module of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** 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

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****************************************************************************/

#include <private/qpaintengine_preview_p.h>

#include <private/qpainter_p.h>

#include <private/qpaintengine_p.h>

#include <private/qpicture_p.h>

#include <QtGui/qprintengine.h>

#include <QtGui/qpainter.h>

#include <QtGui/qpicture.h>

#ifndef QT_NO_PRINTPREVIEWWIDGET

QT_BEGIN_NAMESPACE

class QPreviewPaintEnginePrivate : public QPaintEnginePrivate

{

    Q_DECLARE_PUBLIC(QPreviewPaintEngine)

public:

    QPreviewPaintEnginePrivate() : state(QPrinter::Idle) {}

    ~QPreviewPaintEnginePrivate() {}

    QList<const QPicture *> pages;

    QPaintEngine *engine;

    QPainter *painter;

    QPrinter::PrinterState state;

    QPaintEngine *proxy_paint_engine;

    QPrintEngine *proxy_print_engine;

};

QPreviewPaintEngine::QPreviewPaintEngine()

    : QPaintEngine(*(new QPreviewPaintEnginePrivate), PaintEngineFeatures(AllFeatures & ~ObjectBoundingModeGradients))

{

    Q_D(QPreviewPaintEngine);

    d->proxy_print_engine = 0;

    d->proxy_paint_engine = 0;

}

QPreviewPaintEngine::~QPreviewPaintEngine()

{

    Q_D(QPreviewPaintEngine);

    qDeleteAll(d->pages);

}

bool QPreviewPaintEngine::begin(QPaintDevice *)

{

    Q_D(QPreviewPaintEngine);

    qDeleteAll(d->pages);

    d->pages.clear();

    QPicture *page = new QPicture;

    page->d_func()->in_memory_only = true;

    d->painter = new QPainter(page);

    d->engine = d->painter->paintEngine();

    d->pages.append(page);

    d->state = QPrinter::Active;

    return true;

}

bool QPreviewPaintEngine::end()

{

    Q_D(QPreviewPaintEngine);

    delete d->painter;

    d->painter = 0;

    d->engine = 0;

    d->state = QPrinter::Idle;

    return true;

}

void QPreviewPaintEngine::updateState(const QPaintEngineState &state)

{

    Q_D(QPreviewPaintEngine);

    d->engine->updateState(state);

}

void QPreviewPaintEngine::drawPath(const QPainterPath &path)

{

    Q_D(QPreviewPaintEngine);

    d->engine->drawPath(path);

}

void QPreviewPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)

{

    Q_D(QPreviewPaintEngine);

    d->engine->drawPolygon(points, pointCount, mode);

}

void QPreviewPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)

{

    Q_D(QPreviewPaintEngine);

    d->engine->drawTextItem(p, textItem);

}

void QPreviewPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)

{

    Q_D(QPreviewPaintEngine);

    d->engine->drawPixmap(r, pm, sr);

}

void QPreviewPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &p)

{

    Q_D(QPreviewPaintEngine);

    d->engine->drawTiledPixmap(r, pm, p);

}

bool QPreviewPaintEngine::newPage()

{

    Q_D(QPreviewPaintEngine);

    QPicture *page = new QPicture;

    page->d_func()->in_memory_only = true;

    QPainter *tmp_painter = new QPainter(page);

    QPaintEngine *tmp_engine = tmp_painter->paintEngine();

    // copy the painter state from the original painter

    Q_ASSERT(painter()->d_func()->state && tmp_painter->d_func()->state);

    *tmp_painter->d_func()->state = *painter()->d_func()->state;

    // composition modes aren't supported on a QPrinter and yields a

    // warning, so ignore it for now

    tmp_engine->setDirty(DirtyFlags(AllDirty & ~DirtyCompositionMode));

    tmp_engine->syncState();

    delete d->painter;

    d->painter = tmp_painter;

    d->pages.append(page);

    d->engine = tmp_engine;

    return true;

}

bool QPreviewPaintEngine::abort()

{

    Q_D(QPreviewPaintEngine);

    end();

    qDeleteAll(d->pages);

    d->state = QPrinter::Aborted;

    return true;

}

QList<const QPicture *> QPreviewPaintEngine::pages()

{

    Q_D(QPreviewPaintEngine);

    return d->pages;

}

void QPreviewPaintEngine::setProxyEngines(QPrintEngine *printEngine, QPaintEngine *paintEngine)

{

    Q_D(QPreviewPaintEngine);

    d->proxy_print_engine = printEngine;

    d->proxy_paint_engine = paintEngine;

}

void QPreviewPaintEngine::setProperty(PrintEnginePropertyKey key, const QVariant &value)

{

    Q_D(QPreviewPaintEngine);

    d->proxy_print_engine->setProperty(key, value);

}

QVariant QPreviewPaintEngine::property(PrintEnginePropertyKey key) const

{

    Q_D(const QPreviewPaintEngine);

    return d->proxy_print_engine->property(key);

}

int QPreviewPaintEngine::metric(QPaintDevice::PaintDeviceMetric id) const

{

    Q_D(const QPreviewPaintEngine);

    return d->proxy_print_engine->metric(id);

}

QPrinter::PrinterState QPreviewPaintEngine::printerState() const

{

    Q_D(const QPreviewPaintEngine);

    return d->state;

}

QT_END_NAMESPACE

#endif