Dynamic Scrollarea Content

[rouge]

hi
I would like to have a scrollarea contains a dynamic count of images...

I tried to solve it like you see below. But the problem is that the scrollbar never appear...

My approach is:
I design with the QT desinger a ScrollArea (scrollArea) with default ScrollBarAsNeeded. Then I at also in the QT Designer a widget to the ScrollArea (named scrollContent).

Then in the Programm i tried:

QVBoxLayout* ScrollBoxLayout = new QVBoxLayout();
ScrollBoxLayout->setSpacing(2);
ScrollBoxLayout->setMargin(2);
ScrollBoxLayout->setAlignment(Qt::AlignTop);
ScrollBoxLayout->setSizeConstraint(QLayout::SetMinimumSize);
ui.scrollArea->setLayout(ScrollBoxLayout);

QVBoxLayout* ScrollBoxLayout = new QVBoxLayout();
ScrollBoxLayout->setSpacing(2);
ScrollBoxLayout->setMargin(2);
ScrollBoxLayout->setAlignment(Qt::AlignTop);
ScrollBoxLayout->setSizeConstraint(QLayout::SetMinimumSize);
ui.scrollArea->setLayout(ScrollBoxLayout);

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and add the images like:

for (it=sig.begin(); it!=sig.end(); it++){
  //ignore this part
  image = QImage((uchar *) it->Image()->imageData, it->Image()->width, it->Image()->height,QImage::Format_RGB888); 
  image = image.rgbSwapped(); 
 
  //add qlabel to widget in scrollarea
  QLabel *img = new QLabel(); 	
  ui.scrollArea->layout()->addWidget(img);
  img->setPixmap(QPixmap::fromImage(image));
  img->repaint();
}

for (it=sig.begin(); it!=sig.end(); it++){
  //ignore this part
  image = QImage((uchar *) it->Image()->imageData, it->Image()->width, it->Image()->height,QImage::Format_RGB888); 
  image = image.rgbSwapped(); 
  
  //add qlabel to widget in scrollarea
  QLabel *img = new QLabel(); 	
  ui.scrollArea->layout()->addWidget(img);
  img->setPixmap(QPixmap::fromImage(image));
  img->repaint();
}

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so the images appears like I wanted row by row... but no scrollbar appears if there are many QLabel objects added...

thx