Re: Win gravity: Diff between ICCCM spec and EWMH

[Sasha Vasko <sasha aftercode net>]

Davor Buvinic wrote:
> I have a question regards window gravity manipulation:
>
> The ICCCM spec (section 4.1.2.3) states the coordinates used to calculate the 
> win gravity reference point. The explanation is (I think) clear.
>
> But in the implementation notes of the EWMH document (draft January 2003), the 
> author of the second table apparently is assuming that the coordinate system 
> is with respect to the inner border of the client window, i.e. for a 
> configure request that the window manager gets,  its need to asume the inner 
> border is at (x, y). With this, the coordinates of the outer border is (x-bw, 
> y-bw).

The ICCCM says :

 The [x,y] location of the window's upper left-outer corner.

therefore you are right and I am wrong.

The table should look like so :

win_gravity:		ref_x:		ref_y:
StaticGravity		x+bw		y+bw
NorthWestGravity	x		y
NorthGravity		x+bw+(width/2)	y
NorthEastGravity	x+bw+width+bw	y
EastGravity		x+bw+width+bw	y+bw+(height/2)
SouthEastGravity	x+bw+width+bw	y+bw+height+bw
SouthGravity		x+bw+(width/2)	y+bw+height+bw
SouthWestGravity	x		y+bw+height+bw
WestGravity		x		y+bw+(height/2)
CenterGravity		x+bw+(width/2)	y+bw+(height/2)


Regards

Sasha Vasko


> AFAIK the window manager always gets the configure request with respect the 
> outer edge of the client window, irrespective if the client window has or not 
> a border. So, the OUTER border is at (x, y) and the INNER border is at (x+bw, 
> y+bw). (Of course, if the window manager don't honors the client bw this 
> doesn't matters).
>
> Is my interpretation of the EWMH correct, or I'm missing something? Excuse me 
> if this was discussed previously, but I browse the mail archives and I only 
> found an email from Sasha Vasko which states the formulas that the EWMH now 
> use. 
>
> - Davor
>  
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