/* Check if there are any visible keyframes (for selection tools) */
int graphop_visible_keyframes_poll(bContext *C)
{
bAnimContext ac;
bAnimListElem *ale;
ListBase anim_data = {NULL, NULL};
ScrArea *sa = CTX_wm_area(C);
size_t items;
int filter;
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;
/* loop over the visible (selection doesn't matter) F-Curves, and see if they're suitable
* stopping on the first successful match
*/
filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE);
items = ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
if (items == 0)
return 0;
for (ale = anim_data.first; ale; ale = ale->next) {
FCurve *fcu = (FCurve *)ale->data;
/* visible curves for selection must fulfill the following criteria:
* - it has bezier keyframes
* - F-Curve modifiers do not interfere with the result too much
* (i.e. the modifier-control drawing check returns false)
*/
if (fcu->bezt == NULL)
continue;
if (fcurve_are_keyframes_usable(fcu)) {
found = 1;
break;
}
}
/* cleanup and return findings */
BLI_freelistN(&anim_data);
return found;
}
/* This is called twice from space_graph.c -> graph_main_area_draw()
* Unselected then selected F-Curves are drawn so that they do not occlude each other.
*/
void graph_draw_curves(bAnimContext *ac, SpaceIpo *sipo, ARegion *ar, View2DGrid *grid, short sel)
{
ListBase anim_data = {NULL, NULL};
bAnimListElem *ale;
int filter;
/* build list of curves to draw */
filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE);
filter |= ((sel) ? (ANIMFILTER_SEL) : (ANIMFILTER_UNSEL));
ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
/* for each curve:
* draw curve, then handle-lines, and finally vertices in this order so that
* the data will be layered correctly
*/
for (ale = anim_data.first; ale; ale = ale->next) {
FCurve *fcu = (FCurve *)ale->key_data;
FModifier *fcm = find_active_fmodifier(&fcu->modifiers);
AnimData *adt = ANIM_nla_mapping_get(ac, ale);
/* map keyframes for drawing if scaled F-Curve */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 0, 0);
/* draw curve:
* - curve line may be result of one or more destructive modifiers or just the raw data,
* so we need to check which method should be used
* - controls from active modifier take precedence over keyframes
* (XXX! editing tools need to take this into account!)
*/
/* 1) draw curve line */
{
/* set color/drawing style for curve itself */
if (BKE_fcurve_is_protected(fcu)) {
/* protected curves (non editable) are drawn with dotted lines */
setlinestyle(2);
}
if (((fcu->grp) && (fcu->grp->flag & AGRP_MUTED)) || (fcu->flag & FCURVE_MUTED)) {
/* muted curves are drawn in a grayish hue */
/* XXX should we have some variations? */
UI_ThemeColorShade(TH_HEADER, 50);
}
else {
/* set whatever color the curve has set
* - unselected curves draw less opaque to help distinguish the selected ones
*/
glColor4f(fcu->color[0], fcu->color[1], fcu->color[2], fcurve_display_alpha(fcu));
}
/* draw active F-Curve thicker than the rest to make it stand out */
if (fcu->flag & FCURVE_ACTIVE) {
glLineWidth(2.0);
}
/* anti-aliased lines for less jagged appearance */
if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) glEnable(GL_LINE_SMOOTH);
glEnable(GL_BLEND);
/* draw F-Curve */
if ((fcu->modifiers.first) || (fcu->flag & FCURVE_INT_VALUES)) {
/* draw a curve affected by modifiers or only allowed to have integer values
* by sampling it at various small-intervals over the visible region
*/
draw_fcurve_curve(ac, ale->id, fcu, &ar->v2d, grid);
}
else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) {
/* just draw curve based on defined data (i.e. no modifiers) */
if (fcu->bezt)
//draw_fcurve_curve_bezts(ac, ale->id, fcu, &ar->v2d);
draw_fcurve_curve(ac, ale->id, fcu, &ar->v2d, grid); // XXX: better to do an optimised integration here instead, but for now, this works
else if (fcu->fpt)
draw_fcurve_curve_samples(ac, ale->id, fcu, &ar->v2d);
}
/* restore settings */
setlinestyle(0);
glLineWidth(1.0);
if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
/* 2) draw handles and vertices as appropriate based on active
* - if the option to only show controls if the F-Curve is selected is enabled, we must obey this
*/
if (!(sipo->flag & SIPO_SELCUVERTSONLY) || (fcu->flag & FCURVE_SELECTED)) {
if (fcurve_are_keyframes_usable(fcu) == 0) {
/* only draw controls if this is the active modifier */
if ((fcu->flag & FCURVE_ACTIVE) && (fcm)) {
switch (fcm->type) {
case FMODIFIER_TYPE_ENVELOPE: /* envelope */
draw_fcurve_modifier_controls_envelope(fcm, &ar->v2d);
break;
}
}
}
else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) {
short mapping_flag = ANIM_get_normalization_flags(ac);
float unit_scale = ANIM_unit_mapping_get_factor(ac->scene, ale->id, fcu, mapping_flag);
glPushMatrix();
glScalef(1.0f, unit_scale, 1.0f);
if (fcu->bezt) {
int do_handles = draw_fcurve_handles_check(sipo, fcu);
if (do_handles) {
/* only draw handles/vertices on keyframes */
glEnable(GL_BLEND);
draw_fcurve_handles(sipo, fcu);
glDisable(GL_BLEND);
}
draw_fcurve_vertices(sipo, ar, fcu, do_handles, (sipo->flag & SIPO_SELVHANDLESONLY), unit_scale);
}
else {
/* samples: only draw two indicators at either end as indicators */
draw_fcurve_samples(sipo, ar, fcu);
}
glPopMatrix();
}
}
/* 3) draw driver debugging stuff */
if ((ac->datatype == ANIMCONT_DRIVERS) && (fcu->flag & FCURVE_ACTIVE)) {
graph_draw_driver_debug(ac, ale->id, fcu);
}
/* undo mapping of keyframes for drawing if scaled F-Curve */
if (adt)
ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 1, 0);
}
/* free list of curves */
BLI_freelistN(&anim_data);
}
