diff options
Diffstat (limited to 'source/blender/editors/space_action/action_data.c')
| -rw-r--r-- | source/blender/editors/space_action/action_data.c | 908 |
1 files changed, 908 insertions, 0 deletions
diff --git a/source/blender/editors/space_action/action_data.c b/source/blender/editors/space_action/action_data.c new file mode 100644 index 00000000000..6e3e456f67d --- /dev/null +++ b/source/blender/editors/space_action/action_data.c @@ -0,0 +1,908 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2015 Blender Foundation + * This is a new part of Blender + * + * Contributor(s): Joshua Leung + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/space_action/action_data.c + * \ingroup spaction + */ + + +#include <math.h> +#include <stdlib.h> +#include <string.h> +#include <float.h> + + +#include "BLI_blenlib.h" +#include "BLI_math.h" +#include "BLI_utildefines.h" + +#include "BLF_translation.h" + +#include "DNA_anim_types.h" +#include "DNA_gpencil_types.h" +#include "DNA_key_types.h" +#include "DNA_object_types.h" +#include "DNA_scene_types.h" +#include "DNA_mask_types.h" + +#include "RNA_access.h" +#include "RNA_define.h" +#include "RNA_enum_types.h" + +#include "BKE_animsys.h" +#include "BKE_action.h" +#include "BKE_fcurve.h" +#include "BKE_global.h" +#include "BKE_library.h" +#include "BKE_key.h" +#include "BKE_main.h" +#include "BKE_nla.h" +#include "BKE_scene.h" +#include "BKE_context.h" +#include "BKE_report.h" + +#include "UI_view2d.h" + +#include "ED_anim_api.h" +#include "ED_gpencil.h" +#include "ED_keyframing.h" +#include "ED_keyframes_edit.h" +#include "ED_screen.h" +#include "ED_markers.h" +#include "ED_mask.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "UI_interface.h" + +#include "action_intern.h" + +/* ************************************************************************** */ +/* ACTION CREATION */ + +/* Helper function to find the active AnimData block from the Action Editor context */ +AnimData *ED_actedit_animdata_from_context(bContext *C) +{ + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + Object *ob = CTX_data_active_object(C); + AnimData *adt = NULL; + + /* Get AnimData block to use */ + if (saction->mode == SACTCONT_ACTION) { + /* Currently, "Action Editor" means object-level only... */ + if (ob) { + adt = ob->adt; + } + } + else if (saction->mode == SACTCONT_SHAPEKEY) { + Key *key = BKE_key_from_object(ob); + if (key) { + adt = key->adt; + } + } + + return adt; +} + +/* -------------------------------------------------------------------- */ + +/* Create new action */ +static bAction *action_create_new(bContext *C, bAction *oldact) +{ + ScrArea *sa = CTX_wm_area(C); + bAction *action; + + /* create action - the way to do this depends on whether we've got an + * existing one there already, in which case we make a copy of it + * (which is useful for "versioning" actions within the same file) + */ + if (oldact && GS(oldact->id.name) == ID_AC) { + /* make a copy of the existing action */ + action = BKE_action_copy(oldact); + } + else { + /* just make a new (empty) action */ + action = add_empty_action(CTX_data_main(C), "Action"); + } + + /* when creating new ID blocks, there is already 1 user (as for all new datablocks), + * but the RNA pointer code will assign all the proper users instead, so we compensate + * for that here + */ + BLI_assert(action->id.us == 1); + action->id.us--; + + /* set ID-Root type */ + if (sa->spacetype == SPACE_ACTION) { + SpaceAction *saction = (SpaceAction *)sa->spacedata.first; + + if (saction->mode == SACTCONT_SHAPEKEY) + action->idroot = ID_KE; + else + action->idroot = ID_OB; + } + + return action; +} + +/* Change the active action used by the action editor */ +static void actedit_change_action(bContext *C, bAction *act) +{ + bScreen *screen = CTX_wm_screen(C); + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + + PointerRNA ptr, idptr; + PropertyRNA *prop; + + /* create RNA pointers and get the property */ + RNA_pointer_create(&screen->id, &RNA_SpaceDopeSheetEditor, saction, &ptr); + prop = RNA_struct_find_property(&ptr, "action"); + + /* NOTE: act may be NULL here, so better to just use a cast here */ + RNA_id_pointer_create((ID *)act, &idptr); + + /* set the new pointer, and force a refresh */ + RNA_property_pointer_set(&ptr, prop, idptr); + RNA_property_update(C, &ptr, prop); +} + +/* ******************** New Action Operator *********************** */ + +/* Criteria: + * 1) There must be an dopesheet/action editor, and it must be in a mode which uses actions... + * OR + * The NLA Editor is active (i.e. Animation Data panel -> new action) + * 2) The associated AnimData block must not be in tweakmode + */ +static int action_new_poll(bContext *C) +{ + Scene *scene = CTX_data_scene(C); + + /* Check tweakmode is off (as you don't want to be tampering with the action in that case) */ + /* NOTE: unlike for pushdown, this operator needs to be run when creating an action from nothing... */ + if (ED_operator_action_active(C)) { + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + Object *ob = CTX_data_active_object(C); + + /* For now, actions are only for the active object, and on object and shapekey levels... */ + if (saction->mode == SACTCONT_ACTION) { + /* XXX: This assumes that actions are assigned to the active object in this mode */ + if (ob) { + if ((ob->adt == NULL) || (ob->adt->flag & ADT_NLA_EDIT_ON) == 0) + return true; + } + } + else if (saction->mode == SACTCONT_SHAPEKEY) { + Key *key = BKE_key_from_object(ob); + if (key) { + if ((key->adt == NULL) || (key->adt->flag & ADT_NLA_EDIT_ON) == 0) + return true; + } + } + } + else if (ED_operator_nla_active(C)) { + if (!(scene->flag & SCE_NLA_EDIT_ON)) { + return true; + } + } + + /* something failed... */ + return false; +} + +static int action_new_exec(bContext *C, wmOperator *UNUSED(op)) +{ + PointerRNA ptr, idptr; + PropertyRNA *prop; + + /* hook into UI */ + UI_context_active_but_prop_get_templateID(C, &ptr, &prop); + + if (prop) { + bAction *action = NULL, *oldact = NULL; + AnimData *adt = NULL; + PointerRNA oldptr; + + oldptr = RNA_property_pointer_get(&ptr, prop); + oldact = (bAction *)oldptr.id.data; + + /* stash the old action to prevent it from being lost */ + if (ptr.type == &RNA_AnimData) { + adt = ptr.data; + } + else if (ptr.type == &RNA_SpaceDopeSheetEditor) { + adt = ED_actedit_animdata_from_context(C); + } + + /* Perform stashing operation - But only if there is an action */ + if (adt && oldact) { + /* stash the action */ + if (BKE_nla_action_stash(adt)) { + /* The stash operation will remove the user already + * (and unlink the action from the AnimData action slot). + * Hence, we must unset the ref to the action in the + * action editor too (if this is where we're being called from) + * first before setting the new action once it is created, + * or else the user gets decremented twice! + */ + if (ptr.type == &RNA_SpaceDopeSheetEditor) { + SpaceAction *saction = (SpaceAction *)ptr.data; + saction->action = NULL; + } + } + else { + //printf("WARNING: Failed to stash %s. It may already exist in the NLA stack though\n", oldact->id.name); + } + } + + /* create action */ + action = action_create_new(C, oldact); + + /* set this new action + * NOTE: we can't use actedit_change_action, as this function is also called from the NLA + */ + RNA_id_pointer_create(&action->id, &idptr); + RNA_property_pointer_set(&ptr, prop, idptr); + RNA_property_update(C, &ptr, prop); + } + + /* set notifier that keyframes have changed */ + WM_event_add_notifier(C, NC_ANIMATION | ND_KEYFRAME | NA_ADDED, NULL); + + return OPERATOR_FINISHED; +} + +void ACTION_OT_new(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "New Action"; + ot->idname = "ACTION_OT_new"; + ot->description = "Create new action"; + + /* api callbacks */ + ot->exec = action_new_exec; + ot->poll = action_new_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/* ******************* Action Push-Down Operator ******************** */ + +/* Criteria: + * 1) There must be an dopesheet/action editor, and it must be in a mode which uses actions + * 2) There must be an action active + * 3) The associated AnimData block must not be in tweakmode + */ +static int action_pushdown_poll(bContext *C) +{ + if (ED_operator_action_active(C)) { + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Check for AnimData, Actions, and that tweakmode is off */ + if (adt && saction->action) { + /* NOTE: We check this for the AnimData block in question and not the global flag, + * as the global flag may be left dirty by some of the browsing ops here. + */ + if (!(adt->flag & ADT_NLA_EDIT_ON)) + return true; + } + } + + /* something failed... */ + return false; +} + +static int action_pushdown_exec(bContext *C, wmOperator *op) +{ + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Do the deed... */ + if (adt) { + /* Perform the pushdown operation + * - This will deal with all the AnimData-side usercounts + */ + if (action_has_motion(adt->action) == 0) { + /* action may not be suitable... */ + BKE_report(op->reports, RPT_WARNING, "Action must have at least one keyframe or F-Modifier"); + return OPERATOR_CANCELLED; + } + else { + /* action can be safely added */ + BKE_nla_action_pushdown(adt); + } + + /* Stop displaying this action in this editor + * NOTE: The editor itself doesn't set a user... + */ + saction->action = NULL; + } + + /* Send notifiers that stuff has changed */ + WM_event_add_notifier(C, NC_ANIMATION | ND_NLA_ACTCHANGE, NULL); + return OPERATOR_FINISHED; +} + +void ACTION_OT_push_down(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Push Down Action"; + ot->idname = "ACTION_OT_push_down"; + ot->description = "Push action down on to the NLA stack as a new strip"; + + /* callbacks */ + ot->exec = action_pushdown_exec; + ot->poll = action_pushdown_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/* ******************* Action Stash Operator ******************** */ + +static int action_stash_exec(bContext *C, wmOperator *op) +{ + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Perform stashing operation */ + if (adt) { + /* don't do anything if this action is empty... */ + if (action_has_motion(adt->action) == 0) { + /* action may not be suitable... */ + BKE_report(op->reports, RPT_WARNING, "Action must have at least one keyframe or F-Modifier"); + return OPERATOR_CANCELLED; + } + else { + /* stash the action */ + if (BKE_nla_action_stash(adt)) { + /* The stash operation will remove the user already, + * so the flushing step later shouldn't double up + * the usercount fixes. Hence, we must unset this ref + * first before setting the new action. + */ + saction->action = NULL; + } + else { + /* action has already been added - simply warn about this, and clear */ + BKE_report(op->reports, RPT_ERROR, "Action has already been stashed"); + } + + /* clear action refs from editor, and then also the backing data (not necessary) */ + actedit_change_action(C, NULL); + } + } + + /* Send notifiers that stuff has changed */ + WM_event_add_notifier(C, NC_ANIMATION | ND_NLA_ACTCHANGE, NULL); + return OPERATOR_FINISHED; +} + +void ACTION_OT_stash(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Stash Action"; + ot->idname = "ACTION_OT_stash"; + ot->description = "Store this action in the NLA stack as a non-contributing strip for later use"; + + /* callbacks */ + ot->exec = action_stash_exec; + ot->poll = action_pushdown_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; + + /* properties */ + ot->prop = RNA_def_boolean(ot->srna, "create_new", true, "Create New Action", + "Create a new action once the existing one has been safely stored"); +} + +/* ----------------- */ + +/* Criteria: + * 1) There must be an dopesheet/action editor, and it must be in a mode which uses actions + * 2) The associated AnimData block must not be in tweakmode + */ +static int action_stash_create_poll(bContext *C) +{ + if (ED_operator_action_active(C)) { + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Check tweakmode is off (as you don't want to be tampering with the action in that case) */ + /* NOTE: unlike for pushdown, this operator needs to be run when creating an action from nothing... */ + if (adt) { + if (!(adt->flag & ADT_NLA_EDIT_ON)) + return true; + } + else { + /* There may not be any action/animdata yet, so, just fallback to the global setting + * (which may not be totally valid yet if the action editor was used and things are + * now in an inconsistent state) + */ + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + Scene *scene = CTX_data_scene(C); + + if (!(scene->flag & SCE_NLA_EDIT_ON)) { + /* For now, actions are only for the active object, and on object and shapekey levels... */ + return ELEM(saction->mode, SACTCONT_ACTION, SACTCONT_SHAPEKEY); + } + } + } + + /* something failed... */ + return false; +} + +static int action_stash_create_exec(bContext *C, wmOperator *op) +{ + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Check for no action... */ + if (saction->action == NULL) { + /* just create a new action */ + bAction *action = action_create_new(C, NULL); + actedit_change_action(C, action); + } + else if (adt) { + /* Perform stashing operation */ + if (action_has_motion(adt->action) == 0) { + /* don't do anything if this action is empty... */ + BKE_report(op->reports, RPT_WARNING, "Action must have at least one keyframe or F-Modifier"); + return OPERATOR_CANCELLED; + } + else { + /* stash the action */ + if (BKE_nla_action_stash(adt)) { + bAction *new_action = NULL; + + /* create new action not based on the old one (since the "new" operator already does that) */ + new_action = action_create_new(C, NULL); + + /* The stash operation will remove the user already, + * so the flushing step later shouldn't double up + * the usercount fixes. Hence, we must unset this ref + * first before setting the new action. + */ + saction->action = NULL; + actedit_change_action(C, new_action); + } + else { + /* action has already been added - simply warn about this, and clear */ + BKE_report(op->reports, RPT_ERROR, "Action has already been stashed"); + actedit_change_action(C, NULL); + } + } + } + + /* Send notifiers that stuff has changed */ + WM_event_add_notifier(C, NC_ANIMATION | ND_NLA_ACTCHANGE, NULL); + return OPERATOR_FINISHED; +} + +void ACTION_OT_stash_and_create(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Stash Action"; + ot->idname = "ACTION_OT_stash_and_create"; + ot->description = "Store this action in the NLA stack as a non-contributing strip for later use, and create a new action"; + + /* callbacks */ + ot->exec = action_stash_create_exec; + ot->poll = action_stash_create_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/* ************************************************************************** */ +/* ACTION UNLINK */ + +/* ******************* Action Unlink Operator ******************** */ +/* We use a custom unlink operator here, as there are some technicalities which need special care: + * 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 + */ + +void ED_animedit_unlink_action(bContext *C, ID *id, AnimData *adt, bAction *act, ReportList *reports) +{ + ScrArea *sa = CTX_wm_area(C); + + /* If the old action only has a single user (that it's about to lose), + * warn user about it + * + * TODO: Maybe we should just save it for them? But then, there's the problem of + * trying to get rid of stuff that's actually unwanted! + */ + if (act->id.us == 1) { + BKE_reportf(reports, RPT_WARNING, + "Action '%s' will not be saved, create Fake User or Stash in NLA Stack to retain", + act->id.name + 2); + } + + /* If in Tweak Mode, don't unlink. Instead, this + * becomes a shortcut to exit Tweak Mode instead + */ + if ((adt) && (adt->flag & ADT_NLA_EDIT_ON)) { + /* Exit Tweak Mode */ + BKE_nla_tweakmode_exit(adt); + + /* Flush this to the Action Editor (if that's where this change was initiated) */ + if (sa->spacetype == SPACE_ACTION) { + actedit_change_action(C, NULL); + } + } + else { + /* Unlink normally - Setting it to NULL should be enough to get the old one unlinked */ + if (sa->spacetype == SPACE_ACTION) { + /* clear action editor -> action */ + actedit_change_action(C, NULL); + } + else { + /* clear AnimData -> action */ + PointerRNA ptr; + PropertyRNA *prop; + + /* create AnimData RNA pointers */ + RNA_pointer_create(id, &RNA_AnimData, adt, &ptr); + prop = RNA_struct_find_property(&ptr, "action"); + + /* clear... */ + RNA_property_pointer_set(&ptr, prop, PointerRNA_NULL); + RNA_property_update(C, &ptr, prop); + } + } +} + +/* -------------------------- */ + +static int action_unlink_poll(bContext *C) +{ + if (ED_operator_action_active(C)) { + SpaceAction *saction = (SpaceAction *)CTX_wm_space_data(C); + AnimData *adt = ED_actedit_animdata_from_context(C); + + /* Only when there's an active action, in the right modes... */ + if (saction->action && adt) + return true; + } + + /* something failed... */ + return false; +} + +static int action_unlink_exec(bContext *C, wmOperator *op) +{ + AnimData *adt = ED_actedit_animdata_from_context(C); + + if (adt && adt->action) { + ED_animedit_unlink_action(C, NULL, adt, adt->action, op->reports); + } + + return OPERATOR_FINISHED; +} + +void ACTION_OT_unlink(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Unlink Action"; + ot->idname = "ACTION_OT_unlink"; + ot->description = "Unlink this action from the active action slot (and/or exit Tweak Mode)"; + + /* callbacks */ + ot->exec = action_unlink_exec; + ot->poll = action_unlink_poll; +} + +/* ************************************************************************** */ +/* ACTION BROWSING */ + +/* Try to find NLA Strip to use for action layer up/down tool */ +static NlaStrip *action_layer_get_nlastrip(ListBase *strips, float ctime) +{ + NlaStrip *strip; + + for (strip = strips->first; strip; strip = strip->next) { + /* Can we use this? */ + if (IN_RANGE_INCL(ctime, strip->start, strip->end)) { + /* in range - use this one */ + return strip; + } + else if ((ctime < strip->start) && (strip->prev == NULL)) { + /* before first - use this one */ + return strip; + } + else if ((ctime > strip->end) && (strip->next == NULL)) { + /* after last - use this one */ + return strip; + } + } + + /* nothing suitable found... */ + return NULL; +} + +/* Switch NLA Strips/Actions */ +static void action_layer_switch_strip(AnimData *adt, + NlaTrack *old_track, NlaStrip *old_strip, + NlaTrack *nlt, NlaStrip *strip) +{ + /* Exit tweakmode on old strip + * NOTE: We need to manually clear this stuff ourselves, as tweakmode exit doesn't do it + */ + BKE_nla_tweakmode_exit(adt); + + if (old_strip) { + old_strip->flag &= ~(NLASTRIP_FLAG_ACTIVE | NLASTRIP_FLAG_SELECT); + } + if (old_track) { + old_track->flag &= ~(NLATRACK_ACTIVE | NLATRACK_SELECTED); + } + + /* Make this one the active one instead */ + strip->flag |= (NLASTRIP_FLAG_ACTIVE | NLASTRIP_FLAG_SELECT); + nlt->flag |= NLATRACK_ACTIVE; + + /* Copy over "solo" flag - This is useful for stashed actions... */ + if (old_track) { + if (old_track->flag & NLATRACK_SOLO) { + old_track->flag &= ~NLATRACK_SOLO; + nlt->flag |= NLATRACK_SOLO; + } + } + else { + /* NLA muting <==> Solo Tracks */ + if (adt->flag & ADT_NLA_EVAL_OFF) { + /* disable NLA muting */ + adt->flag &= ~ADT_NLA_EVAL_OFF; + + /* mark this track as being solo */ + adt->flag |= ADT_NLA_SOLO_TRACK; + nlt->flag |= NLATRACK_SOLO; + + // TODO: Needs restpose flushing (when we get reference track) + } + } + + /* Enter tweakmode again - hopefully we're now "it" */ + BKE_nla_tweakmode_enter(adt); + BLI_assert(adt->actstrip == strip); +} + +/* ********************** One Layer Up Operator ************************** */ + +static int action_layer_next_poll(bContext *C) +{ + /* Action Editor's action editing modes only */ + if (ED_operator_action_active(C)) { + AnimData *adt = ED_actedit_animdata_from_context(C); + if (adt) { + /* only allow if we're in tweakmode, and there's something above us... */ + if (adt->flag & ADT_NLA_EDIT_ON) { + /* We need to check if there are any tracks above the active one + * since the track the action comes from is not stored in AnimData + */ + if (adt->nla_tracks.last) { + NlaTrack *nlt = (NlaTrack *)adt->nla_tracks.last; + + if (nlt->flag & NLATRACK_DISABLED) { + /* A disabled track will either be the track itself, + * or one of the ones above it. + * + * If this is the top-most one, there is the possibility + * that there is no active action. For now, we let this + * case return true too, so that there is a natural way + * to "move to an empty layer", even though this means + * that we won't actually have an action. + */ + // return (adt->tmpact != NULL); + return true; + } + } + } + } + } + + /* something failed... */ + return false; +} + +static int action_layer_next_exec(bContext *C, wmOperator *op) +{ + AnimData *adt = ED_actedit_animdata_from_context(C); + NlaTrack *act_track; + + Scene *scene = CTX_data_scene(C); + float ctime = BKE_scene_frame_get(scene); + + /* Get active track */ + act_track = BKE_nlatrack_find_tweaked(adt); + + if (act_track == NULL) { + BKE_report(op->reports, RPT_ERROR, "Could not find current NLA Track"); + return OPERATOR_CANCELLED; + } + + /* Find next action, and hook it up */ + if (act_track->next) { + NlaTrack *nlt; + + /* Find next action to use */ + for (nlt = act_track->next; nlt; nlt = nlt->next) { + NlaStrip *strip = action_layer_get_nlastrip(&nlt->strips, ctime); + + if (strip) { + action_layer_switch_strip(adt, act_track, adt->actstrip, nlt, strip); + break; + } + } + } + else { + /* No more actions (strips) - Go back to editing the original active action + * NOTE: This will mean exiting tweakmode... + */ + BKE_nla_tweakmode_exit(adt); + + /* Deal with solo flags... + * Assume: Solo Track == NLA Muting + */ + if (adt->flag & ADT_NLA_SOLO_TRACK) { + /* turn off solo flags on tracks */ + act_track->flag &= ~NLATRACK_SOLO; + adt->flag &= ~ADT_NLA_SOLO_TRACK; + + /* turn on NLA muting (to keep same effect) */ + adt->flag |= ADT_NLA_EVAL_OFF; + + // TODO: Needs restpose flushing (when we get reference track) + } + } + + /* Update the action that this editor now uses + * NOTE: The calls above have already handled the usercount/animdata side of things + */ + actedit_change_action(C, adt->action); + return OPERATOR_FINISHED; +} + +void ACTION_OT_layer_next(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Next Layer"; + ot->idname = "ACTION_OT_layer_next"; + ot->description = "Switch to editing action in animation layer above the current action in the NLA Stack"; + + /* callbacks */ + ot->exec = action_layer_next_exec; + ot->poll = action_layer_next_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/* ********************* One Layer Down Operator ************************* */ + +static int action_layer_prev_poll(bContext *C) +{ + /* Action Editor's action editing modes only */ + if (ED_operator_action_active(C)) { + AnimData *adt = ED_actedit_animdata_from_context(C); + if (adt) { + if (adt->flag & ADT_NLA_EDIT_ON) { + /* Tweak Mode: We need to check if there are any tracks below the active one that we can move to */ + if (adt->nla_tracks.first) { + NlaTrack *nlt = (NlaTrack *)adt->nla_tracks.first; + + /* Since the first disabled track is the track being tweaked/edited, + * we can simplify things by only checking the first track: + * - If it is disabled, this is the track being tweaked, + * so there can't be anything below it + * - Otherwise, there is at least 1 track below the tweaking + * track that we can descend to + */ + if ((nlt->flag & NLATRACK_DISABLED) == 0) { + /* not disabled = there are actions below the one being tweaked */ + return true; + } + } + } + else { + /* Normal Mode: If there are any tracks, we can try moving to those */ + return (adt->nla_tracks.first != NULL); + } + } + } + + /* something failed... */ + return false; +} + +static int action_layer_prev_exec(bContext *C, wmOperator *op) +{ + AnimData *adt = ED_actedit_animdata_from_context(C); + NlaTrack *act_track; + NlaTrack *nlt; + + Scene *scene = CTX_data_scene(C); + float ctime = BKE_scene_frame_get(scene); + + /* Sanity Check */ + if (adt == NULL) { + BKE_report(op->reports, RPT_ERROR, "Internal Error: Could not find Animation Data/NLA Stack to use"); + return OPERATOR_CANCELLED; + } + + /* Get active track */ + act_track = BKE_nlatrack_find_tweaked(adt); + + /* If there is no active track, that means we are using the active action... */ + if (act_track) { + /* Active Track - Start from the one below it */ + nlt = act_track->prev; + } + else { + /* Active Action - Use the top-most track */ + nlt = adt->nla_tracks.last; + } + + /* Find previous action and hook it up */ + for (; nlt; nlt = nlt->prev) { + NlaStrip *strip = action_layer_get_nlastrip(&nlt->strips, ctime); + + if (strip) { + action_layer_switch_strip(adt, act_track, adt->actstrip, nlt, strip); + break; + } + } + + /* Update the action that this editor now uses + * NOTE: The calls above have already handled the usercount/animdata side of things + */ + actedit_change_action(C, adt->action); + return OPERATOR_FINISHED; +} + +void ACTION_OT_layer_prev(wmOperatorType *ot) +{ + /* identifiers */ + ot->name = "Previous Layer"; + ot->idname = "ACTION_OT_layer_prev"; + ot->description = "Switch to editing action in animation layer below the current action in the NLA Stack"; + + /* callbacks */ + ot->exec = action_layer_prev_exec; + ot->poll = action_layer_prev_poll; + + /* flags */ + ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO; +} + +/* ************************************************************************** */ |