Hi Trygve, 
 
    It was a long time ago but I think the rationale was this. The
DiagramBrowser SystemWindow is composed of 3 panels. The two on the left
and the one on the right where the Diagrams appear. 
 
    This last one isn't a Diagram but a simple Morph acting as a
container because if it wasn't in that way then the SystemWindow would
change the Diagram's color to match the one of the window. 
 
    Another reason in using SystemWindows in this way is that I found it
more convenient for adding and removing submorphs. Here you just add and
remove submorphs from the container and you forget about the
SystemWindow. Without the container you would have to be careful on how
you add and remove the morphs to not mest up the LayoutFrames and
resizeability (does exists that word?) of the SystemWindow panels.
 
    Inside Diagram what we have is:
 
- a TwoWayScrollablePanel
- a TransformMorph
- an HJPasteUpMorph
 
    To reduce one level of composition we could make Diagram to be a
subclass of TwoWayScrollablePane, but I did it in this way because a
Diagram do not only holds the TwoWayScrollablePane but also an extra
annotation panel which is not visible by default (right click on the
diagram and select: 'shows annotations panel'). 
 
    The TransformMorph is part of the TwoWayScrollablePanel so we cannot
get rid of it. The last level is the PasteUpMorph which holds the
shapes, and thats it.  Those were the six level.
 
Hope it helps.
 
Regards,
Hernán
 

-----Original Message-----
From: squeak-dev-bounces at lists.squeakfoundation.org
[mailto:squeak-dev-bounces at lists.squeakfoundation.org] On Behalf Of
Trygve Reenskaug
Sent: Monday, August 16, 2004 2:23 PM
To: The general-purpose Squeak developers list
Subject: RE: Widow activation


Hernán,
Many thanks for your quick reply.

The problem was that TwoWayScrollPane>>handlesMouseDown: returned true
and the event did not reach up to the SystemWindow.
Changing it to false solved the problem.

Jacaranda was my starting point for the present programs, but I have
tried to simplify the morph structure. Corresponding to my three levels,
I find 6 levels in Jacaranda:

a SystemWindow
a Morph (Morph default)
a Diagram (handlesMouseDown: returns evt yellowButtonPressed, i.e.,
false)
a TwoWayScrollPane (handlesMouseDown: returns true)
a TransformMorph (Morph default)
a HJPasteUpMorph (handlesMouseDown: returns true)

I haven't quite penetrated the rationale behind the many layers in
Jacaranda, but it seems as if I could have introduced a dummy layer
below the SystemWindow for the purposes of returning false. My solution
is to use my own sco of TwoWayScollPane that returns true. This may be a
hack since I there may be a deep reason for ScrollPanes to return true.

Problem resolved. Many thanks for putting me on the right track
--Trygve

-----------------------------------------------
At 16.08.2004 11:34, Hernán wrote:



Hi Trygve, 
        
        You should check DiagramBrowser. In there I have the same
structure than you (SystemWindow, TwoWayScrollPane and PasteUpMorph) but
without the problem you are describing.

        How are you handling the events? With #on:send:to: or overriding
#handlesMouseDown: and #mouseDown: ? Because If you return false in
#handlesMouseDown: I am pretty sure that the event should reach the
SystemWindow and get it activated.

        BTW, you can always from the event handler send the #activate
message to the SystemWindow yourself.

> -----Original Message-----
> From: Trygve
> 
> I have a SystemWindow
>    containing a TwoWayScrollPane
>      containing a PasteUpMorph
> 
> The window is activated (moved to the top) if I click the 
> SystemWindow header.
> It is not activated if I click in a visible corner of the 
> PasteUpMorph.
> 
> I have tried making the PasteUpMorph keep the event 
> WasHandeled at =false,
> but it doesn't help.
> 
> Any ideas?
> Cheers
> --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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