[Interest] Widget cross-platform (minimum) size constraint problem.

[Frank Hemer]

On Wednesday 02 January 2013 10:46:24 Goblin Coding wrote:
> Hi Tony,
> 
> You make a valid point.  Originally the idea was to allow for scrollbars,
> but since that comes with an entirely different set of issues (as soon as
> the scrollbar appears, it "cramps the style" of the remaining
> widgets...i.e. when the horizontal scrollbar is created, it actually uses
> some of the available vertical space and overlaps some of the widgets in
> the scroll area...I hope that makes sense).
> 
> I'll try using a standard QWidget as parent (as opposed to the QScrollArea)
> and see how that pans out.
> 
> I also realise that there are no guarantees regarding the look of the Qt
> widgets on different platforms.  What I actually wanted to find out is if
> there was a way to design a widget in Qt Designer so that the way it looks
> in Designer will be the way it is created at run-time? (i.e. if I tweak it
> on Windows and run it on Windows, it should look fine on Windows...if I
> subsequently go tweak it on Linux and run it on Linux, it should look fine
> on Linux).  My problem is that, so far, it seems setting min values is a
> hit and miss operation - tweak value, compile, run, see what it looks like,
> realise it's too big/small, tweak value, compile, etc etc.

What you would need is a 'getMinRequiredSize' method ...
I whish this would exist - as it would allow for choosing different layouts 
according to the available space, i.e. to create specialized layout managers. 
Currently calculating the expected size _BEFORE_ showing a widget is really 
expensive ...

Frank