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

[Bernard D. <bde...@or...>]

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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