// colors: Takes one argument, either a tuple of three floats, a string
// color name, or an integer color index
static PyObject *graphics_color(PyObject *self, PyObject *args) {
int id;
PyObject *obj;
int result = -1;
if (!PyArg_ParseTuple(args, (char *)"iO:graphics.color", &id, &obj))
return NULL;
MoleculeGraphics *mol = mol_from_id(id);
if (!mol)
return NULL;
if (PyInt_Check(obj)) {
int index = PyInt_AsLong(obj);
if (index >= 0 && index < MAXCOLORS)
result = mol->use_color(index);
} else if (PyString_Check(obj)) {
char *name = PyString_AsString(obj);
VMDApp *app = get_vmdapp();
int index = app->color_index(name);
if (index >= 0)
result = mol->use_color(index);
}
if (result >= 0)
return PyInt_FromLong(result);
PyErr_SetString(PyExc_ValueError, (char *)"Invalid color");
return NULL;
}
static PyObject *set_colors(PyObject *self, PyObject *args) {
PyObject *newdict;
if (!PyArg_ParseTuple(args, (char *)"O!", &PyDict_Type, &newdict))
return NULL;
VMDApp *app = get_vmdapp();
PyObject *keys = PyDict_Keys(newdict);
PyObject *vals = PyDict_Values(newdict);
int error = 0;
for (int i=0; i<PyList_Size(keys); i++) {
char *keyname = PyString_AsString(PyList_GET_ITEM(keys, i));
if (PyErr_Occurred()) {
error = 1;
break;
}
if (app->color_index(keyname) < 0) {
PyErr_SetString(PyExc_ValueError, (char *)"Unknown color");
error = 1;
break;
}
PyObject *newtuple = PyList_GET_ITEM(vals, i);
if (!PyTuple_Check(newtuple) || PyTuple_Size(newtuple) != 3) {
PyErr_SetString(PyExc_ValueError, (char *)"color definition must be 3-tuple of floats");
error = 1;
break;
}
float rgb[3];
for (int j=0; j<3; j++)
rgb[j] = (float)PyFloat_AsDouble(PyTuple_GET_ITEM(newtuple, j));
if (PyErr_Occurred()) {
error = 1;
break;
}
app->color_changevalue(keyname, rgb[0], rgb[1], rgb[2]);
}
Py_DECREF(keys);
Py_DECREF(vals);
if (error)
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
static PyObject* py_set_colors(PyObject *self, PyObject *args, PyObject *kwargs)
{
PyObject *newdict, *newtuple, *keys, *vals;
const char *kwnames[] = {"colors", NULL};
PyObject *retval = NULL;
char *keyname;
float rgb[3];
VMDApp *app;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!:color.set_colors",
(char**) kwnames, &PyDict_Type, &newdict))
return NULL;
if (!(app = get_vmdapp()))
return NULL;
keys = PyDict_Keys(newdict);
vals = PyDict_Values(newdict);
for (int i=0; i<PyList_Size(keys); i++) {
// Get color name from input dictionary
keyname = as_charptr(PyList_GetItem(keys, i));
if (PyErr_Occurred())
goto cleanup;
// Check this color name actually exists
if (app->color_index(keyname) < 0) {
PyErr_Format(PyExc_ValueError, "Unknown color '%s'", keyname);
goto cleanup;
}
// Unpack value tuples into 3 floats
newtuple = PyList_GetItem(vals, i);
if (!PyTuple_Check(newtuple) || PyTuple_Size(newtuple) != 3) {
PyErr_SetString(PyExc_ValueError,
"color definition must be 3-tuple of floats");
goto cleanup;
}
for (int j=0; j<3; j++) {
rgb[j] = (float)PyFloat_AsDouble(PyTuple_GET_ITEM(newtuple, j));
if (PyErr_Occurred()) {
PyErr_SetString(PyExc_ValueError, "color definition must be floats");
goto cleanup;
}
}
// Finally actually change the color
app->color_change_rgb(keyname, rgb[0], rgb[1], rgb[2]);
}
retval = Py_None;
// Getting the keys and values from the dictionary makes a new reference.
// We tell Python we're done with it so as to not leak memory.
// This needs to happen even if there was a problem setting color, which is
// why we don't return NULL from the error checking statements above.
cleanup:
Py_DECREF(keys);
Py_DECREF(vals);
Py_XINCREF(retval);
return retval;
}