Geoff the Medio wrote:
Having clicking or double-clicking a system do different things depending on not-necessarily-obvious details of the system doesn't seem like a good idea. A particular user action should have a consistent result, be that showing the system or opening the production screen to a system.
Even if a system doesn't have any valid production locations for an empire, there's no reason to make it impossible to view the system in the production screen, particularly if doing so means the same UI action would do one thing in some situations, do nothing in other situations, or do something else in yet other situations. This could be confusing for players.
This is a feature I really like in latest games in Civilization series. Clicking on your own city brings building screen. Clicking on other empire's city brings diplomacy screen. Completely different results follow seemingly same UI action... Unless you consider clicking your own asset and clicking an asset of another player separate
UI actions. Context is clear in this example.
I'm not sure what is not clear in FreeOrion's example of double clicking systems. You either have colonies in a system, or you don't. If you don't know this much, you are a confused user anyway.