FreeCAD

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/***************************************************************************
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 *   Copyright (c) 2016 WandererFan <wandererfan@gmail.com>                *
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 *                                                                         *
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 *   This file is part of the FreeCAD CAx development system.              *
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 *                                                                         *
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 *   This library is free software; you can redistribute it and/or         *
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 *   modify it under the terms of the GNU Library General Public           *
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 *   License as published by the Free Software Foundation; either          *
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 *   version 2 of the License, or (at your option) any later version.      *
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 *                                                                         *
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 *   This library  is distributed in the hope that it will be useful,      *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU Library General Public License for more details.                  *
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 *                                                                         *
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 *   You should have received a copy of the GNU Library General Public     *
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 *   License along with this library; see the file COPYING.LIB. If not,    *
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 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
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 *   Suite 330, Boston, MA  02111-1307, USA                                *
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 *                                                                         *
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 ***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <cmath>
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# include <sstream>
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# include <QGraphicsItem>
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# include <QRectF>
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# include <QString>
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#endif
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#include <Mod/TechDraw/App/DrawViewImage.h>
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#include "QGIViewImage.h"
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#include "QGCustomClip.h"
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#include "QGCustomImage.h"
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#include "Rez.h"
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#include "ViewProviderImage.h"
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using namespace TechDrawGui;
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QGIViewImage::QGIViewImage()
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{
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    setHandlesChildEvents(false);
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    setFlag(QGraphicsItem::ItemClipsChildrenToShape, false);
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    setCacheMode(QGraphicsItem::NoCache);
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    setAcceptHoverEvents(true);
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    setFlag(QGraphicsItem::ItemIsMovable, true);
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    setFlag(QGraphicsItem::ItemIsSelectable, true);
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    setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
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    m_cliparea = new QGCustomClip();
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    addToGroup(m_cliparea);
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    m_cliparea->setRect(0., 0., 5., 5.);
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    m_cliparea->centerAt(0., 0.);
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    m_imageItem = new QGCustomImage();
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    m_imageItem->setTransformationMode(Qt::SmoothTransformation);
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    m_cliparea->addToGroup(m_imageItem);
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    m_imageItem->centerAt(0., 0.);
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}
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QGIViewImage::~QGIViewImage()
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{
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    // m_imageItem belongs to this group and will be deleted by Qt
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}
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void QGIViewImage::setViewImageFeature(TechDraw::DrawViewImage *obj)
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{
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    setViewFeature(static_cast<TechDraw::DrawView *>(obj));
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}
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void QGIViewImage::updateView(bool update)
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{
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    auto viewImage( dynamic_cast<TechDraw::DrawViewImage *>(getViewObject()) );
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    if (!viewImage)
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        return;
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    if (update ||
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        viewImage->isTouched() ||
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        viewImage->Width.isTouched() ||
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        viewImage->Height.isTouched() ||
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        viewImage->ImageFile.isTouched()) {
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        draw();
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    }
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    if (viewImage->Scale.isTouched()) {
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        draw();
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    }
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    QGIView::updateView(update);
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}
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void QGIViewImage::draw()
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{
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    if (!isVisible()) {
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        return;
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    }
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    auto viewImage( dynamic_cast<TechDraw::DrawViewImage*>(getViewObject()) );
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    if (!viewImage)
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        return;
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    auto vp = static_cast<ViewProviderImage*>(getViewProvider(getViewObject()));
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    if (!vp)
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        return;
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    bool crop = vp->Crop.getValue();
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    drawImage();
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    if (crop) {
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        QRectF cropRect(0.0, 0.0, Rez::guiX(viewImage->Width.getValue()), Rez::guiX(viewImage->Height.getValue()));
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        m_cliparea->setRect(cropRect);
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    } else {
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        QRectF cropRect(0.0, 0.0, m_imageItem->imageSize().width(), m_imageItem->imageSize().height());
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        m_cliparea->setRect(cropRect);
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    }
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    m_cliparea->centerAt(0.0, 0.0);
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    drawImage();
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}
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void QGIViewImage::drawImage()
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{
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    auto viewImage( dynamic_cast<TechDraw::DrawViewImage *>(getViewObject()) );
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    if (!viewImage)
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        return;
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    if (!viewImage->ImageIncluded.isEmpty()) {
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        QString fileSpec = QString::fromUtf8(viewImage->ImageIncluded.getValue(), strlen(viewImage->ImageIncluded.getValue()));
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        m_imageItem->load(fileSpec);
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        m_imageItem->setScale(viewImage->getScale());
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        QRectF br = m_cliparea->rect();
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        double midX = br.width()/2.0;
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        double midY = br.height()/2.0;
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        m_imageItem->centerAt(midX, midY);
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        m_imageItem->show();
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    }
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}
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void QGIViewImage::rotateView()
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{
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    QRectF r = m_cliparea->boundingRect();
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    m_cliparea->setTransformOriginPoint(r.center());
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    double rot = getViewObject()->Rotation.getValue();
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    m_cliparea->setRotation(-rot);
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}
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