On 22/01/2010, at 2:13 PM, Kyle Sluder wrote:

> But that's different from blithely drawing the
> resize handles at whatever scale AppKit has calculated for you.

I didn't say I was. AppKit doesn't decide on the scale, the user does. Appkit 
merely sets up a transform to suit. The resize handles are carefully drawn in 
accordance with the scale according to the rules I want to apply - in my case 
at 33% of the zoom scale, within certain limits. It would also be possible to 
draw them always at the same scale (1:1) or at one of several fixed sizes if I 
wanted. At no point is anything not under the control of the programmer.

> My preferred solution: ditch NSRulerView. :)


That does seem to me to be throwing the baby out with the bathwater. I guess if 
I wanted to heavily customise NSRulerView it might be easier to start from 
scratch, but the built-in class is not bad as far as it goes, and does do a 
great deal of really tedious work for you.

So, what it boils down to is:

a) roll your own view scaling/zooming and you have to implement your own 
rulers, or:

b) use the built-in view scaling/zooming and you have to implement your own 
resize handles or other "scale-proof" UI widget drawing.

Seems as broad as it's long to me, though I still favour (b)!

--Graham


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