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/*
* CodeQuery
* Copyright (C) 2013-2016 ruben2020 https://github.com/ruben2020/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "asrt.h"
#include "core_iface.h"
#include "showgraph.h"
/** Magnifying factor for getting more detailed images */
const int IMAGE_EXPORT_SCALE_FACTOR = 2;
/** Adjust value for image's bounding rectangle on scene rendering */
const qreal IMAGE_RECT_ADJUST = 10;
QImage showgraph::convertToImage(QString grpxml)
{
/** Create graph instance */
GraphView* graph_view = new GraphView();
graph_view->setGraph( new GGraph( graph_view, true));
/** Read graph from XML */
graph_view->graph()->readFromXML( grpxml);
/**
* Perform layout in single thread.
* Multi thread wouldn't work since we do not run QApplication::exec() and there is not event loop
*/
graph_view->graph()->doLayoutSingle();
/** Get scene rectangle */
QRectF scene_rect( graph_view->scene()->itemsBoundingRect()
.adjusted( -IMAGE_RECT_ADJUST, -IMAGE_RECT_ADJUST,
IMAGE_RECT_ADJUST, IMAGE_RECT_ADJUST));
/** Render to image */
QImage image( scene_rect.width() * IMAGE_EXPORT_SCALE_FACTOR,
scene_rect.height() * IMAGE_EXPORT_SCALE_FACTOR,
QImage::Format_RGB32);
image.fill( graph_view->palette().base().color().rgb());
QPainter pp( &image);
pp.setRenderHints( graph_view->renderHints());
graph_view->scene()->render( &pp, image.rect(), scene_rect);
delete graph_view;
return image;
}
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