[Style] Allow style for backward element on repeat loop, on Activity diagram

[The-Lum]

Hi PlantUML team,

Context

To continue (style on (beta-)Activity diagram):

• https://forum.plantuml.net/16711/style-allow-all-style-for-stereotype-on-activity-diagram
• Activity: Allow post-positioned stereotype style #1422
• Activity: Allow to style SDL stereotype  #1423

Ref. or other similar issue:

• https://forum.plantuml.net/16912/backward-in-repeat-loop-not-possible-to-set-color

Wanted feature

• Could you allow style for backward element on Activity diagram?

Source

@startuml
<style>
.save {
  LineColor blue
  BackgroundColor lightCyan
  LineThickness 2
  ArrowThickness 0.5
  FontName Arial Narrow
  FontColor red
  FontSize 11
  FontStyle regular
}
</style>
repeat
  :Generate diagrams; <<save>>
backward:Log context; <<save>>
repeat while (more data?) is (yes)

repeat
  :Generate diagrams; <<save>>
backward:Log
context; <<save>>
repeat while (more data?) is (yes)
@enduml

Output: The backward element is not styled (tested on 1.2023.11beta2) ❌

Regards,
Th.

[arnaudroques]

Thanks for the report and for your tests!
This should be fixed in last snapshot.

[LolaBeckett]

Nice to get this fix, thank you.
Then I am wondering what is the "backward" skinparam to get one SDL Output shape red and one other green for example.
I did not get "activityshape" to work

@startuml
<style>
.output {
  BackgroundColor red
}

.sdloutputgreen {
  activityshape outputstype
  BackgroundColor lightgreen
}

</style>
repeat
  :Generate diagrams; <<save>>
backward:It is red; <<output>>
repeat while (more data?) is (yes)
repeat
  :Generate diagrams; <<save>>
backward:I want it green and with SDL Output shape; <<sdloutputgreen>>
repeat while (more data?) is (yes)
@enduml

[The-Lum]

Hi @LolaBeckett,

For that see issues (and wanted features) here:

• [Style] Allow multiple style stereotypes for Mindmap, WBS, Activity diagram, ... #1527
• [Style] Allow multiple style stereotypes for backward element on Activity diagram #1538

Awaiting enhancement of those topics,
Regards,
Th.

[gwendalrobic]

Hi,
Thanks a lot for the functionality to apply the style to a backward element. However, after downloading version 1.2023.12, I cannot style a backward element in a while loop.

@startuml
<style>
.USR {
  BackgroundColor #PowderBlue
}

.SSTEM {
  BackgroundColor #LightGray
}

</style>
while (data available?)
  :read data; <<USR>>
  :generate diagrams;<<SSTEM>>
backward:Collect errors; <<USR>>
endwhile
end
@enduml

I tried this plantuml code on the diagram generator and it ended up like this :

In that case, I was expecting the backward element to be colored in PowderBlue.

Should I open a new issue/feature or is it related to that feature ?
Thanks for your consideration.

[The-Lum]

Hi @gwendalrobic, and all,

Thanks for your report.
I just opened a new issue for that: #1632.

Regards,
Th.