NLA SoC: Delete Tracks Operator (XKEY / DELKEY) over the channel list

This deletes all the strips in the relevant (selected) tracks too.

source/blender/editors/space_nla/nla_channels.c

@@ -423,4 +423,58 @@ void NLA_OT_add_tracks (wmOperatorType *ot)
 	RNA_def_boolean(ot->srna, "above_selected", 0, "Above Selected", "Add a new NLA Track above every existing selected one.");
 }
 
+/* ******************** Delete Tracks Operator ***************************** */
+/* Delete selected NLA Tracks */
+
+static int nlaedit_delete_tracks_exec (bContext *C, wmOperator *op)
+{
+	bAnimContext ac;
+	
+	ListBase anim_data = {NULL, NULL};
+	bAnimListElem *ale;
+	int filter;
+	
+	/* get editor data */
+	if (ANIM_animdata_get_context(C, &ac) == 0)
+		return OPERATOR_CANCELLED;
+		
+	/* get a list of the AnimData blocks being shown in the NLA */
+	filter= (ANIMFILTER_VISIBLE | ANIMFILTER_NLATRACKS | ANIMFILTER_SEL);
+	ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
+	
+	/* delete tracks */
+	for (ale= anim_data.first; ale; ale= ale->next) {
+		NlaTrack *nlt= (NlaTrack *)ale->data;
+		AnimData *adt= BKE_animdata_from_id(ale->id);
+		
+		/* call delete on this track - deletes all strips too */
+		free_nlatrack(&adt->nla_tracks, nlt);
+	}
+	
+	/* free temp data */
+	BLI_freelistN(&anim_data);
+	
+	/* set notifier that things have changed */
+	ANIM_animdata_send_notifiers(C, &ac, ANIM_CHANGED_BOTH);
+	WM_event_add_notifier(C, NC_SCENE, NULL);
+	
+	/* done */
+	return OPERATOR_FINISHED;
+}
+
+void NLA_OT_delete_tracks (wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Delete Tracks";
+	ot->idname= "NLA_OT_delete_tracks";
+	ot->description= "Delete selected NLA-Tracks and the strips they contain.";
+	
+	/* api callbacks */
+	ot->exec= nlaedit_delete_tracks_exec;
+	ot->poll= nlaop_poll_tweakmode_off;
+	
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+}
+
 /* *********************************************** */

source/blender/editors/space_nla/nla_draw.c

@@ -391,9 +391,6 @@ void draw_nla_main_data (bAnimContext *ac, SpaceNla *snla, ARegion *ar)
 					NlaStrip *strip;
 					int index;
 					
-					/* draw backdrop? */
-					// TODO...
-					
 					/* draw each strip in the track (if visible) */
 					for (strip=nlt->strips.first, index=1; strip; strip=strip->next, index++) {
 						if (BKE_nlastrip_within_bounds(strip, v2d->cur.xmin, v2d->cur.xmax)) {
@@ -420,7 +417,7 @@ void draw_nla_main_data (bAnimContext *ac, SpaceNla *snla, ARegion *ar)
 					// TODO: if tweaking some action, use the same color as for the tweaked track (quick hack done for now)
 					if (adt && (adt->flag & ADT_NLA_EDIT_ON)) {
 						// greenish color (same as tweaking strip) - hardcoded for now
-						glColor4f(0.3f, 0.95f, 0.1f, 0.3f); // FIXME: only draw the actual range of the action darker?
+						glColor4f(0.3f, 0.95f, 0.1f, 0.3f);
 					}
 					else {
 						if (ale->data)

source/blender/editors/space_nla/nla_intern.h

@@ -106,6 +106,7 @@ void NLAEDIT_OT_split(wmOperatorType *ot);
 void NLA_OT_channels_click(wmOperatorType *ot);
 
 void NLA_OT_add_tracks(wmOperatorType *ot);
+void NLA_OT_delete_tracks(wmOperatorType *ot);
 
 /* **************************************** */
 /* nla_ops.c */

source/blender/editors/space_nla/nla_ops.c

@@ -132,6 +132,7 @@ void nla_operatortypes(void)
 	WM_operatortype_append(NLA_OT_channels_click);
 	
 	WM_operatortype_append(NLA_OT_add_tracks);
+	WM_operatortype_append(NLA_OT_delete_tracks);
 	
 	/* select */
 	WM_operatortype_append(NLAEDIT_OT_click_select);
@@ -166,6 +167,10 @@ static void nla_keymap_channels (wmWindowManager *wm, ListBase *keymap)
 	WM_keymap_add_item(keymap, "NLA_OT_add_tracks", AKEY, KM_PRESS, KM_SHIFT, 0);
 	RNA_boolean_set(WM_keymap_add_item(keymap, "NLA_OT_add_tracks", AKEY, KM_PRESS, KM_CTRL|KM_SHIFT, 0)->ptr, "above_selected", 1);
 	
+		/* delete tracks */
+	WM_keymap_add_item(keymap, "NLA_OT_delete_tracks", XKEY, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "NLA_OT_delete_tracks", DELKEY, KM_PRESS, 0, 0);
+	
 	/* General Animation Channels keymap (see anim_channels.c) ----------------------- */
 	/* selection */
 		/* borderselect - not in tweakmode */