void MainWindow::exportImage() {
QVector<CPoint> centroids = nGas.getCentroids();
QVector<KPoint> points = nGas.getPoints();
QImage image(imageSize,QImage::Format_RGB32);
QProgressDialog progress(this);
progress.setWindowTitle("Self-organizing maps");
progress.setLabelText("Generating file...");
progress.setModal(true);
progress.show();
int k = 0;
for(int i=0;i<image.width();i++) {
progress.setValue(((double)i / (double)image.width()) * 100);
if(progress.wasCanceled())
return;
for(int j=0;j<image.height();j++) {
for(int d=0;d<centroids.size();d++)
centroids[d].setDistance(Centroids::countDistance(centroids[d],points[k]));
qSort(centroids.begin(),centroids.end(),SortByDistance());
image.setPixel(i,j,qRgb(centroids[0].paramAt(0),centroids[1].paramAt(1),centroids[2].paramAt(2)));
k++;
}
}
progress.setValue(100);
QGraphicsScene* scene = new QGraphicsScene(this);
ui->graphicsView_2->setScene(scene);
scene->addPixmap(QPixmap::fromImage(image.scaled(ui->graphicsView->width()*0.95,ui->graphicsView->height()*0.95)));
ui->graphicsView_2->show();
QImageWriter writer;
writer.setFileName(QFileDialog::getSaveFileName(this,tr("Open image"),"C:\\Users\\GiBSoN\\Desktop",tr("Image files (*.jpg *.png)")));
writer.setFormat("jpg");
writer.setCompression(10);
writer.write(image);
}
static QByteArray randomJPEGByteArray(int w=512, int h=512, int q=85 )
{
QImage image=randomImage(w,h);
QBuffer bu;
bu.open(QBuffer::WriteOnly);
QImageWriter iw;
iw.setFormat("jpeg");
iw.setDevice(&bu);
iw.setOptimizedWrite(true );
iw.setQuality(q);
iw.setCompression(9);
iw.setProgressiveScanWrite(true );
iw.write( image );
bu.close();
QByteArray ba=bu.buffer();
//utility::byteArrayToFile("random_test.jpeg",ba );
//qDebug()<<"Random JPEG image of size "<<w<<"x"<<h<<" was "<< utility::humanReadableSize(ba.size())<< "("<<(qreal)ba.size()/((qreal)w*h) << " bytes/pixel)";
return ba;
}
