[syslinux] How to define the main menu style

[Murali (முரளி கணபதி)]

On Tue, Feb 17, 2009 at 5:32 AM, Erwan Velu <erwan at seanodes.com> wrote:
> Murali (முரளி கணபதி) wrote:
>> On Fri, Feb 13, 2009 at 6:01 AM, Erwan <erwan at seanodes.com> wrote:
>>
>>> Hey Murali,
>>>
>>> I'm currently playing with the menu system (against latest git).That's a
>>> very nice toy you gave us, thanks ;o)
>>>
>>> I was just wondering if it's possible to put the main menu as a single line
>>> on top of the screen instead of having a big box on the top left on the
>>> screen.
>>> Having a single line a the top would leave me a lot of space for the sub
>>> menu.
>>>
>>
>> You want the top level menu to be horizontal instead of vertical! The
>> menu rendering code only renders vertically now. You could add a
>> boolean field to the menu data structure and modify the rendering code
>> appropriately. I would guess no more than 20-30 line code change.
>>
>>
> Hey Murali,
> I don't know that much the menu code, could you provide me some hints to
> achieve that task ?
>

Glad the code is being used.

* menu/libmenu/menu.h contains the declaration of the menu structure
(struct s_menu). You would need to add a boolean (vertical/horiz) and
possibly some more params related to horizontal rendering.

* menu/libmenu/menu.c contains the actual rendering code. The
following functions would need to be modified
  + printmenu
     Need to handle horiz rendering
  + printradiomenu
     I wouldn't bother with changing this assuming you dont want a
radio box rendered horiz.
     Could probably just enforce that radiomenu's are always vertical.
  + clearmenu (to clean up horiz menu also)
  + getmenuoption
     Depending on horiz/vertical rendering UP/DOWN and RIGHT/LEFT keys
should have different action.

* The entry point for the code is showmenus() function which does some
setup and calls runmenusystem() which does all the work.

For testing, we should also ensure that it does the right thing if a
non-top level menu is horizontal.

Feel free to email if you have other questions.

-- 
Murali

கற்றது கை மண் அளவு, கல்லாதது உலகளவு
(What we know is only a handful, what we dont is the rest of the world)