[Interest] #define in qml

[Bo Thorsen]

Den 21-02-2012 19:17, Thiago Macieira skrev:
> On terça-feira, 21 de fevereiro de 2012 22.16.09, Konstantin Tokarev wrote:
>> 21.02.2012, 22:09, "Thiago Macieira"<thiago at kde.org>:
>>> On terça-feira, 21 de fevereiro de 2012 18.06.37, qtnext wrote:
>>>>   it's sure that lot of people will wait for a release version of 5.0, or
>>>>   5.1, if there is no way to use the same source code with #ifdef ...
>>>>   Providing the way to test Qt5 before, will allow more feedback from
>>>>   users ... and a stronger release ! just my two cents !
>>>
>>> There's nothing we can do. The language simply doesn't support it.
>>
>> Wouldn't it be possible to enable simple version comparison like e.g.
>>
>> if (QtQuick.Version<  2) {
>> // some code
>> } else {
>> // other code
>> }
>>
>> ?
>
> That's already possible. But it doesn't help in any way because you can't have
> an import statement in "some code" there.
>
> You HAVE to write
> 	import QtQuick 1.1
> or
> 	import QtQuick 2.0
>
> without conditionals.

True. However, you kept writing that we have to load a QML file from C++ 
based on "some choice" if we support multiple versions. This test along 
with a Loader object shows how you do this in javascript. I guess this 
is only important if you have a project with only QML and JS files and 
don't want to start up C++ files as well.

Maybe this was obvious, I just mention it for completion.

Bo Thorsen,
Fionia Software.

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