Render widgets to different positions on paintdevice - qt

Question

With Qt I want to print multiple widgets onto a single DINA4-page.
Say I have 3 widgets that I want to place directly next to each other:
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| A |
-------
| B |
-------
| C |
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As I render them in my code below, all 3 widgets are rendered above each other at the postion of C (or even A and B are not rendered at all, I don't see it). I intended to move each widget a little bit down by the size of the last widget, to render it directly next to the last one. This seems not to work:
int lastWidgetHeight;
lastWidgetHeight= 0;
for (int i = 0; i < this->widgets.size(); i++){
Wid* e = widgets.at(i);
QWidget *printBox = e->printArea();
// define float scaleX and scaleY [...]
QPainter painter;
painter.begin(printer);
painter.scale(scaleX,scaleY);
// render and translate in y-direction:
printBox->render(&painter, QPoint(0,lastWidgetHeight)); // <-- My idea
painter.end();
lastWidgetHeight+= e->height();
}
If all 3 widgets are rendered, then how does the loop affect the position of A and B, since I create a new QPainter-Object each time?

Answer 1

You can set your 3 elements in a layout
QVVoxLayout *Vertical_layout;
this->getLayout()->addLayout(this->Vertical_layout);
Vertical_layout->addItem(ElementA);
Vertical_layout->addItem(ElementB);
Vertical_layout->addItem(ElementC);
and you can set the distance between them with:
Vertical_layout- >setContentsMargins(left,top,right,bottom);
With that they will always be in their place.