v := RTView new.

fiveCircles := RTEllipse new size: [ :e | 40 atRandom + 5 ]; elementsOn: (1 to: 5).
fiveBoxes := RTBox new size: [ :e | 40 atRandom + 5 ]; elementsOn: (1 to: 5).

v addAll: fiveCircles; addAll: fiveBoxes.

v elements do: [ :element | element translateTo: (200 atRandom @ 200 atRandom) ].

v addMenu: 'Red' callback: [ v canvas shapes do: [ :aTrachelShape | aTrachelShape color: Color red ]. v canvas signalUpdate ].

v addMenu: 'Blue' callback: [ v canvas shapes do: [ :aTrachelShape | aTrachelShape color: Color blue ]. v canvas signalUpdate ].
v

On Feb 23, 2018, at 3:33 AM, Alidra Abdelghani <alidrandco@yahoo.fr> wrote:

On 21 Feb 2018, at 21:05, Alexandre Bergel <alexandre.bergel@me.com> wrote:

Well�� you can change the color of any element (even if the visualization is open).
Simply goes to the canvas and change the trachel shape. I can provide an example if you wish.

Yes please.
It would be great if
- the modification applies uniformly to all the elements of the visualisation.
- Control the modification using a button or a key combination (increase/decrease)

I dont know if this possible but anyway, your solution looks fine to me :)

Abdelghani

Alexandre

On Feb 21, 2018, at 8:38 AM, abdelghani ALIDRA <alidrandco@yahoo.fr> wrote:

Hi Alex and thanks for your answer,
By playing with the contrast I mean to change (dynamically) how visible lighter colors are from darker ones. And by dynamically, I mean I dont want to re-build the visu.

To be more specific, I can have for a certain visu, a shape coloured with Color red and bordered with Color red slightlyDarker.
At some point I would like to see the difference between these two colours and at some other point I dont.
So for instance, I increase the contrast and I see the border of the shape them I decrease it then I see the shape uniformaly coloured.

So, is there a way to do so?
Thanks,
Abdelghani

De : Alexandre Bergel <alexandre.bergel@me.com>
�� : abdelghani ALIDRA <alidrandco@yahoo.fr>; Any question about pharo is welcome <pharo-users@lists.pharo.org>
Envoy�� le : Mercredi 21 f��vrier 2018 2h19
Objet : Re: [Pharo-users] Roassal : Playing with the contrast

Hi!

What do you mean with contrasts? You mean the colors?
Currently, there is no way to automatically assign colors to a visualization, although you can use a color palette (look at the class RTPalette).

Cheers,
Alexandre

On Feb 20, 2018, at 7:01 AM, abdelghani ALIDRA via Pharo-users <pharo-users@lists.pharo.org> wrote:

From: abdelghani ALIDRA <alidrandco@yahoo.fr>
Subject: Roassal : Playing with the contrast
Date: February 20, 2018 at 7:01:20 AM GMT-3
To: "pharo-users@lists.pharo.org" <pharo-users@lists.pharo.org>
Reply-To: abdelghani ALIDRA <alidrandco@yahoo.fr>

Hi,

I am wondering if there is a way to play with the contrast of Roassal visualisations.
If so, please tell me how :)

Thank you in advance
Abdelghani