Hi guys,
I'm italian and my english is not so good so...I'll try as possible in a very schematic way!
1. What I want
I have an atoms square box L*L (physics simulation) and each of them have two possible spin values (binary information, very simple). I want to display this box to an image (atom ---> pixel, spin value ----->pixel color ).
So, I initialize my box and display it to my MainWindow. But during the simulation, in each step of my loop I select a spin (a pixel) and I flip it (flip pixel's color).
It's all! (simply)
2. What I've done...
The first algorithm works fine (I can view my image in a correct way)....
/* Previously, I declared
QImage *reticolo_image=new QImage(L,L,QImage::Format_RGB32);
QPixmap *pix=new QPixmap;
pix->fromImage(*reticolo_image); */
void MainWindow::inizializzaImage(int *reticolo)
/* reticolo is a Pointer to array representing my box..I don't use a matrix
representation, it's the same. */
{
QRgb downValue, upValue;
downValue=qRgb(122,163,39); //green
upValue=qRgb(237,187,51); //orange
int t;
for(t=0;t<L*L;t++)
{
if (t==0)
{
if (reticolo[t]==1) reticolo_image->setPixel(0,0,upValue);
if (reticolo[t]==-1) reticolo_image->setPixel(0,0,downValue);
}
else
{
if (reticolo[t]==1) reticolo_image->setPixel(t%L,(int)(t/L),upValue); // t%L=y t/L=x in matricial representation
if (reticolo[t]==-1) reticolo_image->setPixel(t%L,(int)(t/L),downValue);
}
}
reticolo_image
->scaled
(QSize(270,
270));
pixtmp->fromImage(*reticolo_image);
pix=pixtmp;
ui->labelImage->setPixmap(*pix);
ui->labelImage->show();
}
/* Previously, I declared
QImage *reticolo_image=new QImage(L,L,QImage::Format_RGB32);
QPixmap *pix=new QPixmap;
pix->fromImage(*reticolo_image); */
void MainWindow::inizializzaImage(int *reticolo)
/* reticolo is a Pointer to array representing my box..I don't use a matrix
representation, it's the same. */
{
QRgb downValue, upValue;
downValue=qRgb(122,163,39); //green
upValue=qRgb(237,187,51); //orange
int t;
for(t=0;t<L*L;t++)
{
if (t==0)
{
if (reticolo[t]==1) reticolo_image->setPixel(0,0,upValue);
if (reticolo[t]==-1) reticolo_image->setPixel(0,0,downValue);
}
else
{
if (reticolo[t]==1) reticolo_image->setPixel(t%L,(int)(t/L),upValue); // t%L=y t/L=x in matricial representation
if (reticolo[t]==-1) reticolo_image->setPixel(t%L,(int)(t/L),downValue);
}
}
reticolo_image->scaled(QSize(270, 270));
QPixmap *pixtmp=new QPixmap(270,270);
pixtmp->fromImage(*reticolo_image);
pix=pixtmp;
ui->labelImage->setPixmap(*pix);
ui->labelImage->show();
}
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The problem is that I can't upload or view any pixel color change on the screen. I thing that this is a correct (and simple) way to approach this question, instead using QPainter and similar.
I've simply changed a pixel color with setPixel without using tableColor because I selected RGB32 format.
void MainWindow::changeSpin(int spin, int value)
{
int x,y, L;
QRgb downValue, upValue;
downValue=qRgb(122,163,39); //green
upValue=qRgb(237,187,51); //orange
L=ui->sL->value();
x=spin%L;
y=(int)(spin/L);
if (value==1) reticolo_image->setPixel(x,y,downValue);
if (value==-1) reticolo_image->setPixel(x,y,upValue);
ui->labelImage->setPixmap(*pix); // I've also tried without replacing these last rows
ui->labelImage->show();
}
void MainWindow::changeSpin(int spin, int value)
{
int x,y, L;
QRgb downValue, upValue;
downValue=qRgb(122,163,39); //green
upValue=qRgb(237,187,51); //orange
L=ui->sL->value();
x=spin%L;
y=(int)(spin/L);
if (value==1) reticolo_image->setPixel(x,y,downValue);
if (value==-1) reticolo_image->setPixel(x,y,upValue);
ui->labelImage->setPixmap(*pix); // I've also tried without replacing these last rows
ui->labelImage->show();
}
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PS: the second algorithm is a SLOT called by a SIGNAL emitted in my main simulation function.
I hope someone help me...I know it!
You are a great resource...
Thanks
QImage & Pixel manipulation
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