[Development] Qt5 missing features

[Alan Alpert]

On Thu, 12 Apr 2012 11:28:43 ext Lincoln Ramsay wrote:
> On 04/12/2012 11:00 AM, ext Alan Alpert wrote:
> > One thing I don't understand in this discussion is this theme manager
> > concept (like QStyle).
> 
> ...
> 
> > Why exactly do we need this level of indirection
> 
> Because of this:
> 
> import Widgets 1.0
> 
> As opposed to this:
> 
> //import MeeGoWidgets 1.0
> //import SymbianWidgets 1.0
> import DesktopWidgets 1.0
> 
> 
> If there was a "standard API" defined for a "components" and each
> platform provided something that was source-compatible with this API
> then that would work too (without indirection) but I haven't seen anyone
> suggesting that a platform's "components" should adhere to some
> "standard API".

I suggest it :) . It's a de-facto standard already if you can simply comment 
in the appropriate import.

> People are coming at this from a "one source, multiple targets"
> viewpoint, which clashes with QML's "one source, one target" design. I
> suspect that people do not want to maintain otherwise
> virtually-identical .qml files for each target platform just because the
> components have a different import, or a different name for an element.

This doesn't require a theme manager abstraction. It could be handled with a 
Widgets import that resolves to MeeGoWidget,SymbianWidgets or DesktopWidgets 
based on runtime platform. (this approach does also require the 'standard API' 
you mention, but that's still not a theme manager - it requires quite 
different actions to make it a reality)

-- 
Alan Alpert
Senior Engineer
Nokia, Qt Development Frameworks