Call for action for Roassal

On Mar 7, 2016, at 10:34 AM, Johan Fabry <[hidden email]> wrote:

Better late than never :-) (working on the holidays backlog)

I only have one request: better positioning on labels of nodes and edges. For example see the image: three of the four labels are badly positioned because the bounding box of their text is intersected by one or more edges.

<Screen Shot 2016-03-07 at 10.31.24.png>

I know that to solve this generally is hard, but for simple cases like this it should be possible. 

Ah, and it should work well with animations and dragging of course ;-)

On Feb 24, 2016, at 05:51, Alexandre Bergel <[hidden email]> wrote:

Dear community,

As you may have seen, Roassal has entered a stabilization phase. The book AgileVisualization.com will soon be released. After its release, Roassal will go over a new development phase. In order to prepare it, I am asking this question:

What are the 3 aspects you would like to see improved in Roassal?

You can answer publicly or by sending private messages.

Kind regards,
Alexandre
-- 
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Alexandre Bergel  http://www.bergel.eu
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On Mar 7, 2016, at 11:34, Peter Uhnák <[hidden email]> wrote:

Hi Johan,

I've just commited RTAnchorConstraint to latest Roassal, see class-side example there.

I've been using it for my class diagrams where it works quite well, however class diagrams are usually orthogonal-ish, which makes it a bit nicer.

 <uml.png>

The Anchor will avoid intersecting it's own line, and one of the end shapes (it should both but apparently I have a bug there...).

It doesn't look at other lines, however you can specify on which side it should be.

(You can also put the node label inside the circle with  `el @ (RTLabelled new center)` but you probably know that.)

<anchor.png>
​

I have also a global edge labeling layout which produces good placement… but it's slow as hell… I need to write a fast flow alogrithm…

Also the Anchor currently doesn't work with self-edges. On the other hand Roassal doesn't have self-edges yet so it shouldn't be a problem. :)

Peter

On Mon, Mar 7, 2016 at 2:34 PM, Johan Fabry <[hidden email]> wrote:

Better late than never :-) (working on the holidays backlog)

I only have one request: better positioning on labels of nodes and edges. For example see the image: three of the four labels are badly positioned because the bounding box of their text is intersected by one or more edges.

<Screen Shot 2016-03-07 at 10.31.24.png>

I know that to solve this generally is hard, but for simple cases like this it should be possible. 

Ah, and it should work well with animations and dragging of course ;-)

On Feb 24, 2016, at 05:51, Alexandre Bergel <[hidden email]> wrote:

Dear community,

As you may have seen, Roassal has entered a stabilization phase. The book AgileVisualization.com will soon be released. After its release, Roassal will go over a new development phase. In order to prepare it, I am asking this question:

What are the 3 aspects you would like to see improved in Roassal?

You can answer publicly or by sending private messages.

Kind regards,
Alexandre
-- 
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel  http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.



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On Mar 10, 2016, at 11:25 AM, Johan Fabry <[hidden email]> wrote:

But now there is a new bug RTAnchorConstraint>>computeExtraDistance that I cannot reliably reproduce, 

On Mar 10, 2016, at 12:42 PM, Peter Uhnák <[hidden email]> wrote:

> To which problem?

The problem is that RTSpringLayoutStepping always uses all the elements in the view and ignores what you set to the layout.

This is a problem, because it will try to also layout the anchor, but that will trigger the anchor to fix itself… and we get endless spinning.

On Thu, Mar 10, 2016 at 4:21 PM, Johan Fabry <[hidden email]> wrote:

On Mar 10, 2016, at 12:08, Alexandre Bergel <[hidden email]> wrote:

There is no other solution? Alex, do you have any idea?

To which problem?

Copy-paste from original mail:

anchor constraints: they do not play well with layouts and animations. Try the code below (adapted from the example to use the layout and animation of LRP ) and you will see that the circles keep spinning around, they never stop. I think it would be better for them to stop ;-)

| v lbls es e1 e2 a1 a2 layout stepping|

v := RTView new.

lbls := RTLabel new elementsOn: #(#First #Second).

es := RTEllipse new

size: 30;

borderColor: Color black;

elementsOn: #(#source #dest).

v

addAll: lbls;

addAll: es.

es @ RTDraggable.

es @ RTLabeled.

e1 := RTArrowedLine new

withContinuousCircleAttachPoint;

color: Color black;

edgeFrom: es first to: es second.

v add: e1.

e2 := RTArrowedLine new

withContinuousCircleAttachPoint;

color: Color black;

edgeFrom: es second to: es first.

v add: e2.

a1 := RTAnchorConstraint new.

a1 anchorShape size: 10.

a1 guideLine color: Color red.

a1

element: lbls first;

edge: e1;

balance: 0.2;

minDistance: 10;

build.

(a2 := RTAnchorConstraint new)

element: lbls second;

edge: e2;

balance: 0.2;

minDistance: 10;

build.

layout := RTForceBasedLayout new

charge: -450; length: 100; 

doNotUseProgressBar; applyOn: es; yourself.

layout initialLayout: RTSugiyamaLayout new.

stepping := RTSpringLayoutStepping new 

view: v; layout: layout;

afterBlock: [ v canvas camera focusOnCenter].

v addAnimation: stepping.

^ v

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Johan Fabry   -   http://pleiad.cl/~jfabry
PLEIAD and RyCh labs  -  Computer Science Department (DCC)  -  University of Chile

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