/* poll callback for adding data/layers - special */
static int gp_data_unlink_poll(bContext *C)
{
bGPdata **gpd_ptr = gpencil_data_get_pointers(C, NULL);
/* if we have access to some active data, make sure there's a datablock before enabling this */
return (gpd_ptr && *gpd_ptr);
}
/* Standard panel to be included whereever Grease Pencil is used... */
void gpencil_panel_standard(const bContext *C, Panel *pa)
{
bGPdata **gpd_ptr = NULL;
PointerRNA ptr;
//if (v3d->flag2 & V3D_DISPGP)... etc.
/* get pointer to Grease Pencil Data */
gpd_ptr= gpencil_data_get_pointers((bContext *)C, &ptr);
if (gpd_ptr)
draw_gpencil_panel((bContext *)C, pa->layout, *gpd_ptr, &ptr);
}
int ED_undo_gpencil_step(bContext *C, int step, const char *name)
{
bGPdata **gpd_ptr = NULL, *new_gpd = NULL;
gpd_ptr = gpencil_data_get_pointers(C, NULL);
if (step == 1) { /* undo */
//printf("\t\tGP - undo step\n");
if (cur_node->prev) {
if (!name || strcmp(cur_node->name, name) == 0) {
cur_node = cur_node->prev;
new_gpd = cur_node->gpd;
}
}
}
else if (step == -1) {
//printf("\t\tGP - redo step\n");
if (cur_node->next) {
if (!name || strcmp(cur_node->name, name) == 0) {
cur_node = cur_node->next;
new_gpd = cur_node->gpd;
}
}
}
if (new_gpd) {
if (gpd_ptr) {
if (*gpd_ptr) {
bGPdata *gpd = *gpd_ptr;
bGPDlayer *gpl, *gpld;
free_gpencil_layers(&gpd->layers);
/* copy layers */
gpd->layers.first = gpd->layers.last = NULL;
for (gpl = new_gpd->layers.first; gpl; gpl = gpl->next) {
/* make a copy of source layer and its data */
gpld = gpencil_layer_duplicate(gpl);
BLI_addtail(&gpd->layers, gpld);
}
}
}
}
WM_event_add_notifier(C, NC_SCREEN | ND_GPENCIL | NA_EDITED, NULL);
return OPERATOR_FINISHED;
}
/* add new layer - wrapper around API */
static int gp_layer_add_exec(bContext *C, wmOperator *op)
{
bGPdata **gpd_ptr = gpencil_data_get_pointers(C, NULL);
/* if there's no existing Grease-Pencil data there, add some */
if (gpd_ptr == NULL) {
BKE_report(op->reports, RPT_ERROR, "Nowhere for grease pencil data to go");
return OPERATOR_CANCELLED;
}
if (*gpd_ptr == NULL)
*gpd_ptr = gpencil_data_addnew(DATA_("GPencil"));
/* add new layer now */
gpencil_layer_addnew(*gpd_ptr, DATA_("GP_Layer"), 1);
/* notifiers */
WM_event_add_notifier(C, NC_GPENCIL | ND_DATA | NA_EDITED, NULL);
return OPERATOR_FINISHED;
}
/* unlink datablock - wrapper around API */
static int gp_data_unlink_exec(bContext *C, wmOperator *op)
{
bGPdata **gpd_ptr = gpencil_data_get_pointers(C, NULL);
if (gpd_ptr == NULL) {
BKE_report(op->reports, RPT_ERROR, "Nowhere for grease pencil data to go");
return OPERATOR_CANCELLED;
}
else {
/* just unlink datablock now, decreasing its user count */
bGPdata *gpd = (*gpd_ptr);
id_us_min(&gpd->id);
*gpd_ptr = NULL;
}
/* notifiers */
WM_event_add_notifier(C, NC_GPENCIL | ND_DATA | NA_EDITED, NULL);
return OPERATOR_FINISHED;
}
/* add new datablock - wrapper around API */
static int gp_data_add_exec(bContext *C, wmOperator *op)
{
bGPdata **gpd_ptr = gpencil_data_get_pointers(C, NULL);
if (gpd_ptr == NULL) {
BKE_report(op->reports, RPT_ERROR, "Nowhere for Grease Pencil data to go");
return OPERATOR_CANCELLED;
}
else {
/* decrement user count and add new datablock */
bGPdata *gpd = (*gpd_ptr);
id_us_min(&gpd->id);
*gpd_ptr = gpencil_data_addnew("GPencil");
}
/* notifiers */
WM_event_add_notifier(C, NC_SCREEN | ND_GPENCIL | NA_EDITED, NULL); // XXX need a nicer one that will work
return OPERATOR_FINISHED;
}
/* poll callback for adding data/layers - special */
static int gp_add_poll(bContext *C)
{
/* the base line we have is that we have somewhere to add Grease Pencil data */
return gpencil_data_get_pointers(C, NULL) != NULL;
}
/* Get the active Grease Pencil datablock */
bGPdata *gpencil_data_get_active(const bContext *C)
{
bGPdata **gpd_ptr = gpencil_data_get_pointers(C, NULL);
return (gpd_ptr) ? *(gpd_ptr) : NULL;
}