Country / zone diagram

[flo-dup]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• A PR or issue has been opened in all impacted repositories (if any)

Does this PR already have an issue describing the problem?
No

What kind of change does this PR introduce?
Feature

What is the current behavior?
Only voltage levels graphs could be generated

What is the new behavior (if this is a feature change)?
Country (or zone) graphs could be generated

Does this PR introduce a breaking change or deprecate an API?

• Yes
• No

[sonarqubecloud]

Quality Gate failed

Failed conditions
67.1% Coverage on New Code (required ≥ 90%)

See analysis details on SonarQube Cloud

[flo-dup]

This has been developped quickly for having a glance of this feature, in order to confirm that users are interested in such a feature.

To do this in a cleaner way,

• we should refactor the existing code as VoltageLevelNode / BusNode is not appropriate for country / zone diagram
• the DefaultCountryLabelProvider is coded to have the arrows at the exact same radius for France, this should be an input parameter
• it would be nice to rely on some geographical position as initial positions for the layout
• the principle should be extended to group voltage levels based on any grouping method given as input
• more unit tests are needed

[flo-dup]

An example for the french neighbouring countries exchanges