Squeak3.10.gamma.7159, WinXP/SP2

I have a window with four panes:
    top left: LayoutFrame fractions: (0 at 0 corner: 0.2 at 0.5)).
    top right pane: LayoutFrame fractions: (0.2 at 0 corner: 1 at 0.5).
    bottom left pane: LayoutFrame fractions: (0 at 0.5 corner: 0.19 at 1).
    bottom right pane: LayoutFrame fractions: (0.19 at 0.5 corner: 1 at 1).

self addPaneSplitters does its impressive magic;
    a horizontal pane splitter right across the window at y=0.5
    two vertical pane splitters one between top left and top right and 
another between bottom left and bottom right.
(The latter two has 'splitsTopAndBottom'=false)

The curious thing is that the two vertical pane splitters are linked; 
any one of them cannot be moved past the other one. The constraint is in 
these methods
/*ProportionalSplitterMorph>>*/
    *normalizedX: x*
             ^ (x max: self leftBoundary) min: self rightBoundary
    *rightBoundary*
            ^ (self splitterRight ifNil: [self containingWindow 
panelRect right] ifNotNil: [self splitterRight left]) - 50
    *splitterRight*
        | splitters |
        splitters _ ((self siblingSplitters select: [:each | each x > 
self x]) asSortedCollection: [:a :b | a x < b x]). 
        ^ splitters ifEmpty: nil ifNotEmpty: [splitters first]
    *siblingSplitters*
        ^ self owner submorphsSatisfying: [:each | (each isKindOf: self 
class) and: [self splitsTopAndBottom = each splitsTopAndBottom] and: 
[each ~= self]]
   
Does anybody know the motivation for this curious behavior? The easiest 
workaround would be to hack *siblingSplitters *to return an empty 
collection. Perhaps it would be better with a new preference? 
(Subclassing /*ProportionalSplitterMorph*/ does not seem practicable).

I'll be grateful for enlightenment about this curious behavior.
--Trygve
**
-- 

Trygve Reenskaug       mailto: trygver at ifi.uio.no

Morgedalsvn. 5A         http://heim.ifi.uio.no/~trygver

N-0378 Oslo               Tel: (+47) 22 49 57 27

Norway

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