[oss-devel] Added "tooltip" and help text support to the mixer API

[Hannu Savolainen]

Yair K. kirjoitti:
> On Friday 21 March 2008 17:23:13 Hannu Savolainen wrote:
>   
>> Hannu Savolainen wrote:
>> I added a new ioctl call
>> (http://manuals.opensound.com/developer/SNDCTL_MIX_DESCRIPTION.html) to
>> the hg version. There is also a new MIXF_DESCR flag that tells if a
>> mixer control has descriptive text available.
>>
>>     
>
>   
>> I also modified ossxmix to show the texts but it looks like it doesn't
>> work yet (at least not under GTK+ versions before 2.12). 
>>     
>
> I tested with a fake description ("strcpy(ei.strings,"... ). GTK 2.12+ is 
> usually fine. It works only on some widgets in GTK < 2.12, maybe because of 
> this restriction (from GtkTooltips.html):
> "Tooltips can only be set on widgets which have their own X window and
>   receive enter and leave events." (They than prescribe a test which doesn't 
> work at all, and a workaround which is too messy to apply).
>
> I suggest the attached diff to simplify check_tooltips a bit. 
Ok.
> (I don't 
> understand why char *p is needed in check_tooltips() - it doesn't look like 
> there's a way to access the "private tooltips", so it's unneccesary).
>   
The 'p' pointer is used to separate the first line (tooltip) from the 
subsequent lines (help text).

Best regards,

Hannu