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List:       koffice-devel
Subject:    Coordinates in KSpread (and maybe other KOffice components).
From:       Inge Wallin <inge () lysator ! liu ! se>
Date:       2005-03-17 13:18:10
Message-ID: 200503171418.11716.inge () lysator ! liu ! se
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Hi gang,

I have started to take on the printing bugs of KSpread, but I am a bit 
confused. 

I can see the use for at least 3 different coordinate systems within KSPread:
1. Cell coordinates (A1 would be (0, 0))
2. Screen coordinates in pixels
3. Metric coordinates which designates an absolute origin of a cell with the 
width and height given in centimeters, millimeters or whatever.

I am sure that all these coordinate systems are used inside KSpread, but I 
haven't found any documentation about which members are using which system.  
In some instances it is obvious, but far from all.

Especially in a lot of calls to methods of, for instance, KSpreadCell, there 
are a lot of QPoints, KoPoints, QRects and KoRects being passed but they are 
never explained.

Is there some documentation that I have missed or is there none?  I would be 
grateful if somebody would explain to me the system of how different 
coordinates are used and also which units are used in the case of a metric 
coordinate system.

 -Inge


-- 
Inge Wallin               | Thus spake the master programmer:               |
                          |      "After three days without programming,     |
inge@lysator.liu.se       |       life becomes meaningless."                |
                          | Geoffrey James: The Tao of Programming.         |
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