Any Morph can use a layoutPolicy.
Available are
none (position based)
Prorportional (frame/fractions/offsets)
Table (overly complex too)
Row (one of mine, quicker for simple rows)
Stack (mine, overlay morphs on top of each other)
TEasilyThemed provides some methods like...
newRow: {aMorph, anotherMorph}
newColumn:
Something like this works...
(UITheme builder
newColumn: {
UITheme builder newPanel
fillStyle: Color red;
hResizing: #spaceFill;
vResizing: #spaceFill.
UITheme builder newRow: {
UITheme builder newOKButton.
UITheme builder newCancelButton}})
extent: 2...@300;
openInHand
(can use openInWindow also)...
Rather busy today, hope this helps in the meantime...
Regards, Gary
----- Original Message -----
From: "Schwab,Wilhelm K" <[email protected]>
To: <[email protected]>
Sent: Sunday, August 08, 2010 11:46 PM
Subject: [Pharo-project] Early days of an MVP framework
Gary,
I was on an unstoppable roll (salvaged early on by Andreas' bitblt
coaching), until I needed to repeat a "complex" GUI component and
wanted/insisted on doing so with some reuse. Seaside gives us components
on web pages; we need them for GUI code too. I tried turning my
presenter-like structures into factories that would add morphs to a single
shell, but it fell apart when it came time to set the framing values. I
was not particularly interested in fixing it, because if I could do that,
I would simply build proper composite widgets using the fix.
The problem appears to be in SystemWindow, which does some incredibly
complicated things, all of which (correct me if I am wrong) would be
unnecessary if only there were a good set of layout managers. I can get
very simple-minded about things, but it would make a whole lot more sense
to me to create rows and columns of widgets, adding splitters between them
until the whole things behaves as intended, rather than writing code
(present only in a top-level shell) that tries to split things up into
rows using its own judgment. Not good. I realize you did not create the
situation, and have done wonders to make it work far better than when you
found it.
Some time ago, I built an emulated widget framework for Dolphin, which I
needed because the combination of Dolphin's view resources and Windows
itself was too slow for what I was trying to do. That project included a
somewhat strange set of layout classes, but the basics are present, and it
is not Object Arts' IP. I ported the classes to Pharo and did some work
on stub View and Presenter classes that I had added to Pharo largely to
passify my code that I was importing from Dolphin. The layouts think in
terms of emulated widgets, and I see no reason to change their minds: I
might want to replicate the framework. However, dynamic typing and a
couple of extra methods allow them to work with just about anything. My
goals are modest. Being able to compose rows and columns would do a lot
for me. Add splitters and the ability to fix the size of some items, and
I could almost anything I would need.
View class>>example
| row column dot square out shell |
dot := ( Form dotOfSize:100 ) asFormOfDepth:32.
square := ( Form squareOfSize:100 ) asFormOfDepth:32.
out := Array writeStream.
row := ContainerView row.
2 timesRepeat:[
column := row addSubview:ContainerView column.
2 timesRepeat:[
out nextPut:(
column addSubview:ImageView new
).
].
].
out contents with:{ dot copy. square copy. square copy. dot copy. } do:[
:view :form |
view morph image:form.
].
row rectangle:( 0...@0 extent:4...@400 ).
row layout.
shell := StandardWindow labelled:'Hello MVP'.
^shell addMorph:row morph frame:( 0...@0 extent:1...@1 ); yourself.
The above code produces an array of dots and squares, as intended. One
quirk is that the grid does not resize as the shell resizes, a consequence
of my not having hooked it up to resize events. I might get some
interesting meltdowns once I begin to do that =:0 I used your PanelMorph
as the "view" associated with ContainerView. What, ContainView isn't a
view??? No. The code is biased toward Morphic, but hopefully the same
code should extend to wx, GTK, etc. Dolphin's views have a handle
instance variable to control the external resource; these views have an
instance variable pointing to their morph. Handling of sub views works
pretty much as in Dolphin: any view/morph can have children, but adding
them is "legal" only for composites.
Most systems I have seen treat coordinates relative to the parent/owner,
but not Morphic. I remember seeing plans to make the change, but nothing
after that. The view instances provide a natural place to fix things, so
I took the plunge. If we switch to some other graphical realization, we
can simply remove the the transformation.
Are the existing splitters as strange as SystemWindow? By that I mean,
would it be reasonable to add them between other morphs and look for
events from them, or will they have to be replaced? I will eventually
need splitters, but I could initially live without them if I can get
reliable composition where I need it.
There are very few view classes at present. MorphView can wrap almost
anything, so it might be better to create a rich set of presenters
instead. Dolphin's view resources are going to be interesting to replace.
There are some complexities that I suspect are in deference to Windows,
and some that might be avoidable. For our purposes, it might be enough to
use SIXX to serialize a bunch of message sends and gzip the results to
save memory. Another option might be to rely on class methods; having
full closures won't hurt; they might allow sufficient hooking that
resources in the Dolphin sense won't even be necessary. The desire for
them quickly arises because views get realized in places know nothing
about how the views should be configured; at least I think that is what
happened to me after just a couple of hours. I am far less interested in
having a graphical view editor than I am in being able to write **GOOD**
code that assembles things as I want. If the result happens to allow a
graphical editor too, so much the better.
Any interest?
Bill
-----------------------------
View
MorphViev
ImageView
ContainerView
ViewGadgetLayoutAbstract
ScrollerGadgetLayout
NullViewGadgetLayout
FixedStretchFixedGadgetLayout
ProportionalGadgetLayout
PreferredExtentsGadgetLayout
GridGadgetRowsLayout
VerticalListLayout
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