Ross Boylan wrote:

>I have a Morph I'll call Inner that holds a bunch of boxes arranged in
>columns.  The number of boxes is large enough that they won't all fit
>on the screen.  I'd like to embed this in a TwoWayScrollPane.
>
>Getting the right sizing information communicated properly has proven
>trickier than I thought, and I'd appreciate any advice on how to
>proceed.  The ownership of the Morphs looks like this, with owners
>above the things they own:
>  SystemWindow
>  TwoWayScrollPane
>  TransformMorph
>  Inner
>
>addMorph:frame:  (I'm doing this from memory, so details may be off)
>works to embed the TwoWayScrollPane in the SystemWindow, but the
>resizing doesn't get transmitted further than that.  The proximate
>cause seems to be that neither TwoWayScrollPane nor TransformMorph
>have a layoutPolicy.  That's sensible, given their regular use.
>
>However, I want one dimension of Inner to match the available space
>(in this case, the vertical dimension).  What is a good way to achieve
>this?  I think one way of putting that is that Inner's vertical should
>spacefill and the horizontal should shrinkWrap.  (Hmm, can I just
>combine those two?)
>  
>
These settings are a little confusing, and some morphs override them 
with their
own policy, for example text morph. But some trial and testing should 
get you
to the wanted behaviour.

>My current thinking is that I should make a custom LayoutPolicy, but
>it looks as if I'd need to put one on both TwoWayScrollPane and
>TransformMorph.  Also, I wonder if a regular TableLayout would do,
>since the behavior I'm currently seeing suggets that TableLayout
>matches the available dimension along its primary direction, and then
>wraps with as much space as it needs in the other direction.
>  
>
The table layout in Squeak is pretty basic and is hard to controll if 
you want an exact layout.
Use proportional layout for anything you want to have controll over.


>Also, is there any functionality around that will make scrolling
>happen automatically if the mouse gets close to the edge of the pane?
>  
>
Should not be hard to implement using mouseEnter or mouseOver events.
Karl

>I'm using TwoWayScrollPane because I'm in a 3.6 image; I'm aware it's
>basically obsolete in 3.7.
>
>Thanks.
>Ross
>
>
>
>  
>