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------- Additional comments from [EMAIL PROTECTED] Fri Nov 16 14:11:44 +0000 
2007 -------
AW->FS: Frank, i already did, see above. You are mixing up the two involved
models here. Definition:
(MD): Model of DrawingLayer, this includes the SdrObjects. There is no
visibility switch at SdrObjects
(MF): Model of FormControls. It has a visible flag.

Since MF uses MD as implementation, it has somehow to reflect the visibility
flag of it's model objects. Since MD has no visibility model flag, it can do
this e.g. by not painting anything. This is possible since the implementation of
the visualisation side of MF uses own VC and VOC classes. not callint
DoPaintObject in an overloaded SdrObject or (much better) returning false in own
overloaded implementation of ShouldPaintObject is totally legal and will
suppress the object's visualisation -> it gets invisible.

Caution needs to be taken for the interactive part. Even when visualisation for
a SdrObejct is suppressed, it can be selected and modified.

Thus it is necessary to define how this part should behave. That's why i asked
how this part behaved in the past. HTH.

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