Re: [Alphacocoa-devel] Technical question about window geometry

[Joachim K. <ko...@ma...>]

Hi Bernard,

thanks for looking into this. It is not
worth spending more time on it.
The offsets I found empirically work very
well, so I'll just leave it at that.
I will soon (well, at some point) commit
a revision of the winZoom stuff.

Cheers,
Joachim.

On 13/09/2019 15:51, Bernard Desgraupes wrote:
> Hi Joachim,
> 
> I’ve been looking at this and my guess is that the horizontal offset you need to add is due to the line numbers margin. Unfortunately this margin does not have a fixed width: that depends on the number of lines. If there are less than 10 lines, the margin is large enough to display 1-digit numbers, if it is between 10 and 99 it is large enough to display 2-digits numbers, etc.
> This certainly complicates your calculations…
> If necessary I could let the core provide the information about the line margin width (via getWinInfo).
> 
> Now vertically, as I said before I think the offset is the title bar’s height (possibly augmented by the toolbar’s height).
> 
> What do you think ?
> 
> Bernard
> 
>> Le 6 sept. 2019 à 21:56, Joachim Kock <ko...@ma...> a écrit :
>>
>> Hi Bernard,
>>
>> I am revising the windowZoom package.
>>
>> When I wrote it many years ago for AlphaX,
>> I had to use some ad hoc home-made font-
>> metrics tables valid only for Monaco :-(
>> In AlphaCocoa, this looks childish, as we now have
>> getWinInfo charWidth and getWinInfo lineHeight :-)
>> Really cool -- it simplifies a lot.
>>
>> My question is about two offsets that seem
>> required. I have determined them empirically:
>> 12 horizontally and 63 vertically.  So that
>> the final calculation of window dimensions to
>> hold $rowNum lines of $colNum chars (at a given
>> font) is:
>>
>> 	# Calculate new geometry
>> 	set x [getWinInfo charWidth]
>> 	set y [getWinInfo lineHeight]
>> 	set newWidth [expr {$x * $colNum + 12}]
>> 	set newHeight [expr {$y * $rowNum + 63}]
>>
>> However, I cannot figure out how to explain
>> these offsets. For example, the difference betweem
>> getGeometry and getCeometry -c gives a vertical
>> difference of 22 (and no horizontal difference).
>> I have tried with line numbers turned off, but
>> it does not seem to make any difference.
>>
>> Do you know how to determine these offsets in
>> a more formal way, and what they depend on?
>>
>> Thanks! -- and no hurry.
>>
>> Cheers,
>> Joachim.
>>
>>
>>
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