QPrinter::PrinterMode and QPrinter::setResolution??

[SkripT]

Hi all, I want to know why there are two ways of setting QPrinter's resolution: using PrinterMode and setResolution. Do they work with the same parameter? Moreover, if I change the resolution with setResolution the volume of the final document (printing in a PDF file) is always the same. Is it a bug of Qt or it's just the correct behaviour?.

I need the resolution because I have to set the page margins from their size in centimeters. Could you suggest me which value of resolution should I use, the one from PrinterMode or the returned calling QPrinter::resolution()??

Thanks.

[SkripT]

Any suggestion, please?

[jacek]

Hi all, I want to know why there are two ways of setting QPrinter's resolution: using PrinterMode and setResolution. Do they work with the same parameter?

No, they don't:

void QPrinter::setResolution ( int dpi )
Requests that the printer prints at dpi or as near to dpi as possible.
This setting affects the coordinate system as returned by, for example QPainter::viewport().
This function must be called before QPainter::begin() to have an effect on all platforms.
See also resolution() and setPageSize().

Using this method you can set the resolution (in dots per inch).

While PrinterMode only controls the default resolution:

enum QPrinter::PrinterMode
This enum describes the mode the printer should work in. It basically presets a certain resolution and working mode.

Could you suggest me which value of resolution should I use, the one from PrinterMode or the returned calling QPrinter::resolution()?

Only QPrinter::resolution() returns the resolution.