static int graph_panel_context(const bContext *C, bAnimListElem **ale, FCurve **fcu)
{
bAnimContext ac;
bAnimListElem *elem = NULL;
/* for now, only draw if we could init the anim-context info (necessary for all animation-related tools)
* to work correctly is able to be correctly retrieved. There's no point showing empty panels?
*/
if (ANIM_animdata_get_context(C, &ac) == 0)
return 0;
/* try to find 'active' F-Curve */
elem = get_active_fcurve_channel(&ac);
if (elem == NULL)
return 0;
if (fcu)
*fcu = (FCurve *)elem->data;
if (ale)
*ale = elem;
else
MEM_freeN(elem);
return 1;
}
/* has active F-Curve that's editable */
int graphop_active_fcurve_poll(bContext *C)
{
bAnimContext ac;
bAnimListElem *ale;
ScrArea *sa = CTX_wm_area(C);
bool has_fcurve = 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;
/* try to get the Active F-Curve */
ale = get_active_fcurve_channel(&ac);
if (ale == NULL)
return 0;
/* free temp data... */
has_fcurve = ((ale->data) && (ale->type == ANIMTYPE_FCURVE));
if (has_fcurve) {
FCurve *fcu = (FCurve *)ale->data;
has_fcurve = (fcu->flag & FCURVE_VISIBLE) != 0;
}
MEM_freeN(ale);
/* return success */
return has_fcurve;
}
static int graphkeys_deselectall_exec(bContext *C, wmOperator *op)
{
bAnimContext ac;
bAnimListElem *ale_active = NULL;
/* get editor data */
if (ANIM_animdata_get_context(C, &ac) == 0)
return OPERATOR_CANCELLED;
/* find active F-Curve, and preserve this for later
* or else it becomes annoying with the current active
* curve keeps fading out even while you're editing it
*/
ale_active = get_active_fcurve_channel(&ac);
/* 'standard' behavior - check if selected, then apply relevant selection */
if (RNA_boolean_get(op->ptr, "invert"))
deselect_graph_keys(&ac, 0, SELECT_INVERT, true);
else
deselect_graph_keys(&ac, 1, SELECT_ADD, true);
/* restore active F-Curve... */
if (ale_active) {
FCurve *fcu = (FCurve *)ale_active->data;
/* all others should not be disabled, so we should be able to just set this directly...
* - selection needs to be set too, or else this won't work...
*/
fcu->flag |= (FCURVE_SELECTED | FCURVE_ACTIVE);
MEM_freeN(ale_active);
ale_active = NULL;
}
/* set notifier that things have changed */
WM_event_add_notifier(C, NC_ANIMATION | ND_KEYFRAME | NA_SELECTED, NULL);
return OPERATOR_FINISHED;
}
