World: r3wp

that's because you must drag mouse up/down and not in circle

I am not sure it should work by dragging the mouse up and down ... 
you should be able to hold the knob and do circular movement imo 
...

I'll probably add circular movement too - but IMO mouse really not 
suitable for circular movements (try to paint a circle with mouse...)

in Cubase there's option for up/down or circular movement for knobs, 
I'll add it later (it's just work in progress)

Pekr, there's a reason why up/down is the preferred way. It's weird 
to start with but it's better control in the long run. The hand is 
more precise in just one direction of mouse movement than two (or 
more, as you might like to see it).

Kru, nice demo ! :) Incidentally, this is just what I have been working 
hard on the last couple of days. Now I must post a demo :)

do http://www.lexicon.net/antonr/rebol/gui/demo-rotate-knob.r

In Reason and FruityLoops (audio sequencing software), up/down is 
the default behaviour.

Anton I'm working on a french rebol software witch names is FaireBo 
it's a weather dashboard  based on METAR/TAF information so I need 
a kind of widget like  the ones you give in your demo to symbolise 
the wind direction  ;)

METAR/ TAF information are comming from airports weather system and 
are usefull in aeronautic

I don't understand why the big view is so aliased

Is it really close to what you need ? If you can show me a picture 
of how the widget should look, I can see if rotate-knob can do it.

The big view is for looking at the pixels. It needs to be non-antialiased.

You can scale each widget by dragging on it then dragging on the 
pair-edit.

what I would like is a cardinal roze of the wind with a dynamical 
arrow that symbolise the wind direction according to the data comming 
from the weather station in the airports

I need to symbolise 8 directions N, NE , E, SE, S, SO, O, NO,

so up, up-right, right, down-right,  down, down-left, left, left-up

this are the direction where the dynamic arrow can be displayed

So, every 45 degres ?

My point is O I make 8 images and show the  right one according to 
the datas

yes ,)

What if there is no wind ?

or I make one image and I make a dynamic arrow using draw effects

Il ne souffle.

there is always wind  ;)

Every 45 degrees can be programmed by setting  rotate-knob-face/divisions: 
45

even if the wind speed is not enought significant

:)

for example today  on paris we have wind from north  N (360) speed 
12 KT.

OK, wind speed is shown by another widget.

in all cases your code is a good example  and a usefull working pass 
for me

Umm, I would need to add the ability to place multiple texts (N, 
NE, E ...) at any position in the face (I will use draw dialect).

Actually in the fairebo's dashboard  I only symbolise weather and 
temperature and for complete weather description we have to report 
to the text report (witch translate the METAR/TAF informations)

I am sure this demo will be useful to you.

What I want to symbolise is the wind speed and direction and the 
humidity

this will brings me 4 dynamic images built according to METAR/TAF 
informations ;)

My idea was to make a images that symbolise the cardinal direction 
(rose of the wind) and using draw effect over draw information like 
arrow or text :)

Well, adding the image is simple. Adding the text should be fairly 
quick too.

Kru, yep, definitely like your style Kru. Just skimming your codes, 
nice and clean. Your multiple colours handling looks smart, too. 
Something I haven't implemented so fully and nicely.

Anton your knobs are nice too, more posibilities than in my design

Anton if you want, use my code - this is probably enough for my purpose 
so I'm going to focus on other elements (now I've got sample window 
in my mind). BTW design of the knobs is inspired by Roland SH1000 
:)

Kru and Anton. Both excellent demos! Should we add a folder on Viewtop 
for custom styles?

Probably yes. There are some good styles around there but it might 
be hard to find them

Draw style constest ?
Can I play too ?
:-)

do http://membres.lycos.fr/didec/rebol/stick-style.r

DiceC that's really nice! I really like it. Did you tried it with 
non-fixed positions of the stick?

Yep, but :
- Not easy to set value by mouse (as said before).

- Effect (fill-pen) is not "mathematicaly" link to stick angle (don't 
find a formula), so hard to do for any value.

très joli !! (very nice )

there is a tiny bug in your algo didec

drag the stick at what ever position stay with the mouse button down 
and you will see the pair position text to be increment every seconds