2.5 - Assorted Animation UI/Editing Tweaks

Main Feature:
* It is now possible to choose which AnimData block is the 'active' one for editing, and/or select them too. AnimData blocks are generally the dark blue and lighter-blue expanders (i.e. Scene, Object, Camera, Lamp, Curve, Armature, etc.)

* Objects are no longer selected/deselected when AKEY is used to toggle selection of channels. This was getting a bit annoying. 

* Following on from selection of AnimData blocks, it is now possible to select/make active an AnimData block in the animation editors, and change the active action for that block via the 'Animation Data' panel in NLA Editor's properties region.
--> Be aware that user-counts are not totally handled correctly there yet, so some funky behaviour might be seen...
--> It is possible to assign a new action, or to assign an existing one, allowing to switch between actions as in the past with Actions/IPO Editors...

Other tweaks:
* Some code tweaks towards making the 'Euler Filter' feature for Graph Editor working sometime soon
* Added some backend code for snapping the values of keyframes to a single value. Still need to work out some UI for it though.
* Shuffled the code for ACT_OT_new() around, and removed the poll() callback so that it worked in NLA too.
* Fixed some more notifier bugs with deleting bones and a few other editmode operations for Armatures.

1 files changed, 30 insertions, 0 deletions

diff --git a/source/blender/editors/space_graph/graph_utils.c b/source/blender/editors/space_graph/graph_utils.c
index f00e7845549..19cffb5cde1 100644
--- a/source/blender/editors/space_graph/graph_utils.c
+++ b/source/blender/editors/space_graph/graph_utils.c
@@ -285,4 +285,34 @@ int graphop_active_fcurve_poll (bContext *C)
 	return has_fcurve;
 }
 
+/* has selected F-Curve that's editable */
+int graphop_selected_fcurve_poll (bContext *C)
+{
+	bAnimContext ac;
+	bAnimListElem *ale;
+	ListBase anim_data = {NULL, NULL};
+	ScrArea *sa= CTX_wm_area(C);
+	int filter, items;
+	short found = 0;
+	
+	/* firstly, check if in Graph Editor */
+	// TODO: also check for region?
+	if ((sa == NULL) || (sa->spacetype != SPACE_IPO))
+		return 0;
+		
+	/* try to init Anim-Context stuff ourselves and check */
+	if (ANIM_animdata_get_context(C, &ac) == 0)
+		return 0;
+	
+	/* get the editable + selected F-Curves, and as long as we got some, we can return */
+	filter= (ANIMFILTER_VISIBLE | ANIMFILTER_SEL | ANIMFILTER_FOREDIT | ANIMFILTER_CURVESONLY);
+	items = ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
+	if (items == 0) 
+		return 0;
+	
+	/* cleanup and return findings */
+	BLI_freelistN(&anim_data);
+	return found;
+}
+
 /* ************************************************************** */