[Development] QTextDocument device scaling

[Nils Jeisecke]

Hi,

I'm currently working on a new feature to enhance QTextDocument's
table rendering with CSS style border formatting (individual settings
for left/right/top/bottom borders of table cells and border-collapse
mode).

While doing this I've stumbled over some inconsistencies regarding
scaling of table/frame format settings to the output device. Examples:

Format settings scaled to the device:
- QTextTableFormat::cellSpacing and cellPadding
- frame width
- table column widths

Format settings not scaled to the device:
- QTextFrameFormat:topMargin, bottomMargin, border
- frame height

Do I miss something here?

Nils