Re: [Pythoncard-users] simple layout managers

[Alex T. <al...@tw...>]

Michael Sorich wrote:

>I have written some code to reposition/resize
>components with changes in Background (wxFrame) size.
>There are 3 options. The only requirement for each is
>that the anchors property is set for each component –
>these indicate how the component should move/size with
>respect to its environment. I have attached a simple
>example GUI that can be run to demonstrate the 3
>layout managers. The layout manager and anchors for
>each component can be changed in
>MyBackground.on_initialize.
>
>1) Simple anchors
>
too simple ...

>2) Relative anchors
>
still too simple ....

>3) Advanced anchors 
>
getting interesting ...

>I would be interested in comments and examples where
>these layout managers do and do not work well.
>  
>
Only talking about Advanced anchors - the others really do hit their 
limits very quickly.

1. In the example you sent out, try to add a "Button 3" mid-way between 
B1 and B2.
I'd like B3 to remain mid-way between them as the window width is varied.

Can't do that currently. Would be easy enough to add a "fixed-size" 
flag, so that it could be anchored to L and R, position calculated as it 
is currently - but then adjusted to keep the size unchanged. (i.e. it 
would find the right place to grow into - but not grow, leaving space on 
each side).

2. (This may really be 1a :-)
In the devx article you mentioned, they had a static text (label) beside 
a text area; as the text area grows, the label should "float" to remain 
half-way up the side.

3. Mix of expanding and non-expanding components.

label 1: [.Txtfld 1...] label 2: [.Txtfld 2...] label 3: [.......tf3.]

where you want the labels to stay fixed-width, and the fields to grow to 
fill the available width.
(I don't think there's a way to do just that).


4. Interference.
Extend the last case ...

[button 1 across here about this long]
label 1: [.Txtfld 1...] label 2: [.Txtfld 2...] label 3: [.......tf3.]

where you want the labels to stay fixed-width, and the fields to grow to 
fill the available width.
The edges of button1 become partition edges - and so change the growth 
patterns of the textfields 1 and 2.
If you put the button way up at the top of the background, and the 
fields way at the bottom - with a lot of other stuff in between, it 
would be very hard to understand what's going on ...

-- Alex.

-- 
Alex Tweedly       http://www.tweedly.net




-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.10.4 - Release Date: 27/04/2005