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/* This file is part of the KDE project
*
* Copyright (C) 2007 Jan Hambrecht <jaham@gmx.net>
* Copyright (C) 2009 Thomas Zander <zander@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "KoShapePainter.h"
#include "KoCanvasBase.h"
#include "KoShapeManager.h"
#include "KoShapeManagerPaintingStrategy.h"
#include "KoShape.h"
#include "KoViewConverter.h"
#include "KoShapeBorderModel.h"
#include "KoShapeGroup.h"
#include "KoShapeContainer.h"
#include <KoUnit.h>
#include <QImage>
class SimpleCanvas : public KoCanvasBase
{
public:
SimpleCanvas()
: KoCanvasBase(0), m_shapeManager(new KoShapeManager(this))
{
}
~SimpleCanvas()
{
delete m_shapeManager;
}
virtual void gridSize(qreal *horizontal, qreal *vertical) const
{
if (horizontal)
*horizontal = 0;
if (vertical)
*vertical = 0;
};
virtual bool snapToGrid() const
{
return false;
}
virtual void addCommand(KUndo2Command *)
{
}
virtual KoShapeManager *shapeManager() const
{
return m_shapeManager;
}
virtual void updateCanvas(const QRectF&)
{
}
virtual KoToolProxy *toolProxy() const
{
return 0;
}
virtual KoViewConverter *viewConverter() const
{
return 0;
}
virtual QWidget *canvasWidget()
{
return 0;
}
virtual const QWidget *canvasWidget() const
{
return 0;
}
virtual KoUnit unit() const
{
return KoUnit(KoUnit::Point);
}
virtual void updateInputMethodInfo() {}
void setCursor(const QCursor &) {}
private:
KoShapeManager *m_shapeManager;
};
class KoShapePainter::Private
{
public:
Private()
: canvas(new SimpleCanvas())
{
}
~Private() { delete canvas; }
SimpleCanvas * canvas;
};
KoShapePainter::KoShapePainter(KoShapeManagerPaintingStrategy *strategy)
: d(new Private())
{
if (strategy) {
strategy->setShapeManager(d->canvas->shapeManager());
d->canvas->shapeManager()->setPaintingStrategy(strategy);
}
}
KoShapePainter::~KoShapePainter()
{
delete d;
}
void KoShapePainter::setShapes(const QList<KoShape*> &shapes)
{
d->canvas->shapeManager()->setShapes(shapes, KoShapeManager::AddWithoutRepaint);
}
void KoShapePainter::paint(QPainter &painter, KoViewConverter &converter)
{
foreach (KoShape *shape, d->canvas->shapeManager()->shapes()) {
shape->waitUntilReady(converter, false);
}
d->canvas->shapeManager()->paint(painter, converter, true);
}
void KoShapePainter::paint(QPainter &painter, const QRect &painterRect, const QRectF &documentRect)
{
if (documentRect.width() == 0.0f || documentRect.height() == 0.0f)
return;
KoViewConverter converter;
// calculate the painter destination rectangle size in document coordinates
QRectF paintBox = converter.viewToDocument(QRectF(QPointF(), painterRect.size()));
// compute the zoom factor based on the bounding rects in document coordinates
// so that the content fits into the image
qreal zoomW = paintBox.width() / documentRect.width();
qreal zoomH = paintBox.height() / documentRect.height();
qreal zoom = qMin(zoomW, zoomH);
// now set the zoom into the zoom handler used for painting the shape
converter.setZoom(zoom);
painter.save();
// initialize painter
painter.setPen(QPen(Qt::NoPen));
painter.setBrush(Qt::NoBrush);
painter.setRenderHint(QPainter::Antialiasing);
painter.setClipRect(painterRect.adjusted(-1,-1,1,1));
// convert document rectangle to view coordinates
QRectF zoomedBound = converter.documentToView(documentRect);
// calculate offset between painter rectangle and converted document rectangle
QPointF offset = QRectF(painterRect).center() - zoomedBound.center();
// center content in painter rectangle
painter.translate(offset.x(), offset.y());
// finally paint the shapes
paint(painter, converter);
painter.restore();
}
void KoShapePainter::paint(QImage &image)
{
if (image.isNull())
return;
QPainter painter(&image);
paint(painter, image.rect(), contentRect());
}
QRectF KoShapePainter::contentRect()
{
QRectF bound;
foreach (KoShape *shape, d->canvas->shapeManager()->shapes()) {
if (!shape->isVisible(true))
continue;
if (dynamic_cast<KoShapeGroup*>(shape))
continue;
QRectF shapeRect = shape->boundingRect();
if (bound.isEmpty())
bound = shapeRect;
else
bound = bound.united(shapeRect);
}
return bound;
}
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