QLabel size, packing algorithm

bkaminiecki

Hi,

I am developing a Text Mining application. Part of the functionality is to create visualization. I am developing a packing algorithm in separate class, this algorithm generates a QList of QLabls, and a QList of QPoints.
How it works:
I have x and y values initialized to 5 (in this case),
I have string values stored in the model,
I am taking strings one by one,
Taken string is used to create a label, label is added to the list QLabels
Values x and y are used to construct the QPoint, and next added to the list of QPoints

New values x and y are calculated for the next label
calculate by formula :

@x= x + lbl->width()+2;
if (x >= 1200) {
x = 5;
y += lbl->height() +2;
}
@

Process continues ...

Then pointers to the both lists are passed to the Form class and displayed on the form.

Here is the whole code:
@
void packer::createColoredLabels(){

model->sort(0,Qt::AscendingOrder);

int x = 5;
int y = 5;

lablesList = new QList<QLabel*>;
coords = new QList<QPoint>;
for(int j=0; j< wCount ; j++){

  QString lblName = model->item(j,0)->text();
  QLabel *lbl = new QLabel(lblName);
  lbl->setAutoFillBackground(true);
  lbl->setFrameShape(QFrame::Panel);
  lbl->setFrameShadow(QFrame::Raised);

  lablesList->append(lbl);
  QPoint p = QPoint(x,y);
  coords->append(p);
  //lbl->show();
 
  x= x + lbl->width()+2;
  if (x >= 1200) {
      x = 5;
      y += lbl->height() +2;
  }

}

}
@

The problem I have is that when I execute the application I see that the coordinates are not calculated correctly, each label inherits properties from QWidget and assign its size. So each label size is fixed to 640x480.

But if i use

@lbl->show();@

commented out in the code I am getting the desired results, that means each label size is actually the size it takes(not 640x480 as above), and everything works as intended. The only thing is I am seeing the small window popping up during the process of generating coordinates by the packing algorithm.

So finally the question is:

Is there any other way than

@lbl->show();@

To force the label to get the its actual size instead of inherited 640x480?

Rgds
Bart