move anything that "deletes" to the delete key

[ahicks92]

Maybe we need to keep other keystrokes for this, but if so we can bring this all down to one key in the alternate as well. We have a lot of things that look like delete which are all completely disjoint. The delete key does this, save for "superghost mining" which would probably fit on shift+delete. This would give us back at least a few keys and move things to somewhere sensible. My candidate list:

• Delete blueprints if on them in the inventory or if the blueprint menu is open.
• Delete ghosts if the cursor is on it like we do with shift+x etc.
• Clear logistics requests on everything that can have them.
• Cancel crafting in the crafting queue (move cancel all to shift+delete)
• In the inventory, send things to logistic trash. Also spidertrons.
• Maybe we want to go as far as mark for deconstruct (single structures, accomplished today with alt+u [ [)
• Clear filters on splitters and filter inserters (in 2.0 all inserters, since filter inserters are going away).
• Clear filters on storage chests and train slots and anything else that might have filters.
• A sorta important to me one we don't have today: shift+click equivalent for electric poles. Drops all copper wire connections.

As far as I can tell the set is completely 100% disjoint and also doesn't care what's in the hand even, though I will say that we should not use our old way of having multiple prototypes to handle this

The advantage here isn't that delete is usually an ergonomic key because even on traditional keyboards it's a little out of the way. The advantage is that it's very easy to teach use delete for delete-like things. There's other obvious extensions as well: zero a signal in a constant combinator for example. But in any case, once the player learns early on that delete deletes, it's the sort of thing they'll probably try later. Also for myself despite being a mod dev, I sometimes have to play "which keystrokes delete" because the infrequency of the action matches the ergonomics of just using the delete key excepting that we didn't (we have what, at least 3 just counting things "on the ground").

Maybe the alternate mapping is backspace. I don't think we use that. It also "feels like deleting" and is a bit more ergonomic plus on all keyboards including weird laptop ones.

[LevFendi]

• Started this feature now for 0.14. Added deleting the planner tool in hand for any menu. This can be overridden for specific menus. I will override it for blueprint books so that you delete the selected planner from the book instead of the book itself.
• I like the suggestions here. Marking for deconstruction needs to be the last on the execution order in case you want to clear filters first.
• The item in hand will have last execution order as well.
• Also, all of these actions are being designed to require a confirmation, which is done by pressing the delete key again within 10 seconds.

[ahicks92]

So careful on that confirmation bit. We don't really have the ability to know if a second key was pressed between delete presses unless you're going to instrument literally every single event by hand.

I actually want to genericize that kind of thing because for example we talked yesterday about two-press train building and at that point we really need to know if it's the nth press within a timeout. But obviously we don't have that yet. If you're going to instrument every event by hand perhaps you want to handle it: register custom events with another module and have that module maintain a running history with timestamps.