We have callbacks for that, they also do some checks and help ensure things are done
correctly. Only place where this is assumed not true is blenloader (since here we
may affect refcount of library IDs as well...).
By popular request, restored the ability to shift-click on the X (unlink) button
to unlink the action (from the active action slot), clear the Fake User, and
also remove the NLA-stashed copy (only works for the current object/NLA stack though).
- Add blentranslation `BLT_*` module.
- moved & split `BLF_translation.h` into (`BLT_translation.h`, `BLT_lang.h`).
- moved `BLF_*_unifont` functions from `blf_translation.c` to new source file `blf_font_i18n.c`.
To help make it more convenient to edit stashed actions, Shift-Tab
(i.e. holding down the Shift key, which "tabbing" into tweakmode as
usual to edit the action referenced by the active NLA strip) now flags
the NLA Track that the strip occupies as being "solo" too.
This allows you to use the NLA to select a stashed action, then Shift-Tab
to start editing it without any other actions in the NLA stack interfering.
Like the "Next/Previous Layer" tools in the Action Editor, this is designed
to help with checking on stashed actions.
After looking into this more carefully, I've found that we do in fact need a dedicate
operator to add some custom logic when trying to unlink an action from the editor/datablocks.
Specifically, this new operator does the following:
1) When in Tweak Mode, it shouldn't be possible to unlink the active action,
or else, everything turns to custard.
2) If the Action doesn't have any other users, the user should at least get
a warning that it is going to get lost.
3) We need a convenient way to exit Tweak Mode from the Action Editor
4) If none of the above apply, we can just unlink normally
This commit implements this for the Action Editor, with stubs for the NLA Editor too.
Those will be fixed next.
Made all action management operators use the AnimData-local flag instead of the scene
global one. Technically, this is more accurate and results in less blocking
situations (i.e. another object may be in tweakmode, but because of that, the active
object's action couldn't be stashed).
The main impetus for this though was that the Action Up/Down feature doesn't clear
the global flag, since it is not in a position to do so (since it can't load up
everything to clear it).
TODO:
I'll need to review how this global flag works and/or potentially ditch it (or
perhaps add some better ways to ensure that it stays valid), since while thinking
this over, I've noticed a few problems here. But, for the meantime, this commit
at least makes things more usable here in the short term.
Now marking NLA Tracks as Solo'd and muting the NLA stack are linked together
when using the Action Layer Up/Down tools. That is, when switching from a NLA strip
to the active action, if the track was solo'd, then the NLA stack will get muted;
and when switching from the active action to a NLA track, if the stack was muted,
the track will get solo'd. This linkage means that we ensure that when moving up
and down the stack, we can continue to check the actions in isolation without things
messing up when you switch to and from the active action.
Also fixed a bug where this wasn't getting applied when going in the other direction.
TODO:
- When we get the rest/reference track support, we're going to need to insert
some calls to flush the restpose values so that values from the previously
used action do not pollute the pose for the new action (if not all the
same controls get keyed across both). For now, it's best to only do this
switching from the first frame.
With this feature, it is now possible to quickly switch between different actions
stacked/stashed on top of each other in the NLA Stack without having to go to the
NLA Editor and doing a tab-select-tab dance, thus saving quite a few clicks. It
was specifically designed with Game Animation / Action Library workflows in mind,
but also helps layered animation workflows.
Usage:
Simply click on the up/down arrow buttons (between the action datablock selector
and the pushdown/stash buttons) to go to the action in the NLA Track above/below
the NLA Strip being whose action is being tweaked in the Action Editor.
Notes:
- These still work when you're not editing the action used by a NLA Strip.
If you're just animating a new action normally, it is possible to use the "down arrow"
to temporarily jump down to the previous action without losing the new action you're
working on, and then use the "up arrow" to get back to it once you're done checking
the other action(s).
- If there are multiple actions/strips on the same layer/track, then only the one
closest to the current frame will be used.
