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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/python/intern/bpy_rna_callback.c
* \ingroup pythonintern
*
* This file currently exposes callbacks for interface regions but may be
* extended later.
*/
#include <Python.h>
#include "RNA_types.h"
#include "bpy_rna.h"
#include "bpy_rna_callback.h"
#include "bpy_util.h"
#include "BLI_utildefines.h"
#include "DNA_screen_types.h"
#include "RNA_access.h"
#include "BKE_context.h"
#include "ED_space_api.h"
/* use this to stop other capsules from being mis-used */
#define RNA_CAPSULE_ID "RNA_HANDLE"
#define RNA_CAPSULE_ID_INVALID "RNA_HANDLE_REMOVED"
static void cb_region_draw(const bContext *C, ARegion *UNUSED(ar), void *customdata)
{
PyObject *cb_func, *cb_args, *result;
PyGILState_STATE gilstate;
bpy_context_set((bContext *)C, &gilstate);
cb_func = PyTuple_GET_ITEM((PyObject *)customdata, 0);
cb_args = PyTuple_GET_ITEM((PyObject *)customdata, 1);
result = PyObject_CallObject(cb_func, cb_args);
if (result) {
Py_DECREF(result);
}
else {
PyErr_Print();
PyErr_Clear();
}
bpy_context_clear((bContext *)C, &gilstate);
}
PyObject *pyrna_callback_add(BPy_StructRNA *self, PyObject *args)
{
void *handle;
PyObject *cb_func, *cb_args;
char *cb_event_str = NULL;
int cb_event;
if (!PyArg_ParseTuple(args, "OO!|s:bpy_struct.callback_add", &cb_func, &PyTuple_Type, &cb_args, &cb_event_str))
return NULL;
if (!PyCallable_Check(cb_func)) {
PyErr_SetString(PyExc_TypeError, "callback_add(): first argument isn't callable");
return NULL;
}
if (RNA_struct_is_a(self->ptr.type, &RNA_Region)) {
if (cb_event_str) {
static EnumPropertyItem region_draw_mode_items[] = {
{REGION_DRAW_POST_PIXEL, "POST_PIXEL", 0, "Post Pixel", ""},
{REGION_DRAW_POST_VIEW, "POST_VIEW", 0, "Post View", ""},
{REGION_DRAW_PRE_VIEW, "PRE_VIEW", 0, "Pre View", ""},
{0, NULL, 0, NULL, NULL}};
if (pyrna_enum_value_from_id(region_draw_mode_items, cb_event_str, &cb_event, "bpy_struct.callback_add()") < 0) {
return NULL;
}
}
else {
cb_event = REGION_DRAW_POST_PIXEL;
}
handle = ED_region_draw_cb_activate(((ARegion *)self->ptr.data)->type, cb_region_draw, (void *)args, cb_event);
Py_INCREF(args);
}
else {
PyErr_SetString(PyExc_TypeError, "callback_add(): type does not suppport callbacks");
return NULL;
}
return PyCapsule_New((void *)handle, RNA_CAPSULE_ID, NULL);
}
PyObject *pyrna_callback_remove(BPy_StructRNA *self, PyObject *args)
{
PyObject *py_handle;
void *handle;
void *customdata;
if (!PyArg_ParseTuple(args, "O!:callback_remove", &PyCapsule_Type, &py_handle))
return NULL;
handle = PyCapsule_GetPointer(py_handle, RNA_CAPSULE_ID);
if (handle == NULL) {
PyErr_SetString(PyExc_ValueError, "callback_remove(handle): NULL handle given, invalid or already removed");
return NULL;
}
if (RNA_struct_is_a(self->ptr.type, &RNA_Region)) {
customdata = ED_region_draw_cb_customdata(handle);
Py_DECREF((PyObject *)customdata);
ED_region_draw_cb_exit(((ARegion *)self->ptr.data)->type, handle);
}
/* dont allow reuse */
PyCapsule_SetName(py_handle, RNA_CAPSULE_ID_INVALID);
Py_RETURN_NONE;
}
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