Re: Cross Platform GNUStep GUI with Native Look-And-Feel

[aditya siram]

Thank you all for the information. Is there currently an open-source
application created with GnuStep that runs with a native look-and-feel
on Windows, Linux and Mac? It would be nice if there were some
reference point.

-deech

On Mon, Jun 27, 2011 at 3:27 AM, Richard Frith-Macdonald
<richard@tiptree.demon.co.uk> wrote:
>
> On 27 Jun 2011, at 08:57, Riccardo Mottola wrote:
>
>> Hi,
>>
>> On 06/27/11 03:01, Gregory Casamento wrote:
>>> Riccardo,
>>>
>>>
>>> 1) Cleanly switching from theme to theme when in-window menus are involved.
>> Yes, this is especially noticeable when native in-windows menus are used, 
>> but that goes along with 3)
>>> 2) Unloading theme images between themes.  When theme A loaded if
>>> theme B doesn't  have images for some of the widgets then theme A's
>>> images are used instead of the default theme's images as may have been
>>> intended.
>> Afaik, unloading was implemented by Richard, but somehow it doesn't work 
>> (anymore).
>
> Yes ... eighteen months ago IIRC, but there have probably been a lot of 
> changes in theming that I haven't been involved with since then...
> The basic principle was simple.
> When you load a theme, all the images for that theme are installed.
> When you unload a theme, all the images for the default theme are installed 
> (which means all system images)
> When you change themes, you have a sequence of unloading the old theme (which 
> cleans out its images) and loading the new.
>
> Now, it's possible to have glitches with this caused by code outside the 
> theming system ... if code makes a *copy* of a system image (rather than 
> retaining it), and caches and re-uses that copy.  There may be some such bugs 
> in odd apps or even odd places in the gui library.  If so, they should either:
>
> 1. not copy the system images, just use them as required .... the best option 
> unless we *know* there is a performance issue.
> 2. where they must do something like keeping a scaled or otherwise modified 
> copy of a system image for performance, they should have the code observe 
> theme loading notifications and regenerate their cache when a new theme is 
> loaded ... this is a general principle of theme aware software, without which 
> no theming system can work properly.
>
>
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