Qt-interest Archive, July 2007
Q_ENUMS: howto register 'external' enums
Message 1 in thread
Hi,
I'm facing the following problem:
I have a lot of classes, and many of them are using the same enums. All
these enums are declared in a separate header file.
I must register these enums with Q_ENUMS in two of my classes. My
current solution is very ugly, but it was the only way I could make it
work: I've duplicated these enums mit Copy/Paste into the header file of
those classes. It means, that my enums are being declared in three
times: in the separate header, and in the header of the classes, where
they must be registered. :(((
Does anyone have a better solution? Any advice would be appriciated.
Thanks
Laszlo
Message 2 in thread
Federics Laszlo a écrit :
> Hi,
>
>
>
> I'm facing the following problem:
>
> I have a lot of classes, and many of them are using the same enums.
> All these enums are declared in a separate header file.
>
> I must register these enums with Q_ENUMS in two of my classes. My
> current solution is very ugly, but it was the only way I could make it
> work: I've duplicated these enums mit Copy/Paste into the header file
> of those classes. It means, that my enums are being declared in three
> times: in the separate header, and in the header of the classes, where
> they must be registered. :(((
>
>
>
> Does anyone have a better solution? Any advice would be appriciated.
>
>
>
> Thanks
>
> Laszlo
>
>
>
>
>
maybe it's stupid but... why don't you do, like in qt qnamespace.h ?
you register and declare you enums and just include this .h in class
file you want to use them.
using this solution and namespace to control if it's a "common" enum or
your "class" enum that you want to use.
AppNamespace
{
Q_ENUMS(ToolButtonStyle )
//etc.......
enum ToolButtonStyle {
ToolButtonIconOnly,
ToolButtonTextOnly,
ToolButtonTextBesideIcon,
ToolButtonTextUnderIcon
};
}
Message 3 in thread
On 7/31/07, veronique.lefrere@xxxxxx <veronique.lefrere@xxxxxx> wrote:
> maybe it's stupid but... why don't you do, like in qt qnamespace.h ?
> you register and declare you enums and just include this .h in class file
> you want to use them.
Qt uses some magic to make this work:
#ifndef Q_MOC_RUN
namespace
#else
class Q_CORE_EXPORT
#endif
Qt {
#ifdef Q_MOC_RUN
Q_OBJECT
Q_ENUMS(Orientation TextFormat BackgroundMode DateFormat
ScrollBarPolicy FocusPolicy ContextMenuPolicy CaseSensitivi
ty LayoutDirection ArrowType ShortcutContext)
Looking at this appears that sometimes the namespace is treated as a
namespace, and other times as class. I don't see any reason why this
shouldn't work though it seems a bit evil.
Cheers
Rich.
--
[ signature omitted ]
Message 4 in thread
Thanks a lot, it will work.
Laszlo
-----Original Message-----
From: Richard Moore [mailto:richmoore44@xxxxxxxxx]
Sent: Tuesday, July 31, 2007 3:38 PM
To: qt-interest@xxxxxxxxxxxxx
Subject: [SPAM] - Re: Q_ENUMS: howto register 'external' enums -
Bayesian Filter detected spam
On 7/31/07, veronique.lefrere@xxxxxx <veronique.lefrere@xxxxxx> wrote:
> maybe it's stupid but... why don't you do, like in qt qnamespace.h ?
> you register and declare you enums and just include this .h in class
file
> you want to use them.
Qt uses some magic to make this work:
#ifndef Q_MOC_RUN
namespace
#else
class Q_CORE_EXPORT
#endif
Qt {
#ifdef Q_MOC_RUN
Q_OBJECT
Q_ENUMS(Orientation TextFormat BackgroundMode DateFormat
ScrollBarPolicy FocusPolicy ContextMenuPolicy CaseSensitivi
ty LayoutDirection ArrowType ShortcutContext)
Looking at this appears that sometimes the namespace is treated as a
namespace, and other times as class. I don't see any reason why this
shouldn't work though it seems a bit evil.
Cheers
Rich.
--
[ signature omitted ]
