Re: Walking zigzag in a Custom buffer

[Lennart Borgman <lennart.borgman.073@student.lu.se>]

Jason Rumney wrote:

>Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
>
>  
>
>>If one looks at "Property:" and "Value:" they seem to be aligned
>>horizontally ok. However placing point at one of those words and
>>moving up and down between them shows that something else in Emacs
>>seems to make a different computation of the button width than was
>>used when displaying the buffer.
>>
>>This makes me think there is a potential bug.
>>    
>>
>
>This is due to the fact that Emacs uses characters, not pixels as its
>unit of horizontal position. The decoration on the buttons causes them
>to be wider than the equivalent fixed-width text without such
>decoration. You can see this by going to the beginning of the line
>containing "Value", and moving foward 3 characters. I think the
>alignment of the colons is more by careful hand placement than a
>difference in computation of button width.
>  
>
Thanks, I guess you are right. I did not think about that possibility. 
Looks to me like one button decoration is a half character wide there. 
Seems to be the easiest way to solve it.