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Copy pathPythonQtProperty.cpp
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284 lines (258 loc) · 9.72 KB
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/*
*
* Copyright (C) 2010 MeVis Medical Solutions AG All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: MeVis Medical Solutions AG, Universitaetsallee 29,
* 28359 Bremen, Germany or:
*
* http://www.mevis.de
*
*/
#include "PythonQtProperty.h"
#include "PythonQtSignal.h"
#include "PythonQtConversion.h"
int PythonQtProperty_init(PyObject* object, PyObject* args, PyObject* kw)
{
PythonQtProperty* self = (PythonQtProperty*)object;
self->data = new PythonQtPropertyData();
PythonQtPropertyData* data = self->data;
PyObject* type = nullptr;
static const char* kwlist[] = {"type", "fget", "fset", "freset", "fdel", "doc", "designable", "scriptable", "stored",
"user", "constant", "final", "notify", nullptr};
if (!PyArg_ParseTupleAndKeywords(args, kw, "O|OOOOObbbbbbO!:QtCore.QProperty", (char**)kwlist, &type, &(data->fget),
&(data->fset), &(data->freset), &(data->fdel), &(data->doc), &(data->designable), &(data->scriptable),
&(data->stored), &(data->user), &(data->constant), &(data->final), &PythonQtSignalFunction_Type,
&(data->notify)))
{
return 0;
}
data->cppType = PythonQtConv::getCPPTypeName(type);
if (data->cppType.isEmpty()) {
PyErr_Format(PyExc_TypeError, "Unknown Property type: %s", type->ob_type->tp_name);
return -1;
}
if (data->fget == Py_None) {
data->fget = nullptr;
}
if (data->fset == Py_None) {
data->fset = nullptr;
}
if (data->freset == Py_None) {
data->freset = nullptr;
}
if (data->fdel == Py_None) {
data->fdel = nullptr;
}
if (data->doc == Py_None) {
data->doc = nullptr;
}
if (data->fdel) {
std::cerr << "Property: fdel is not yet supported!" << std::endl;
}
Py_XINCREF(data->fget);
Py_XINCREF(data->fset);
Py_XINCREF(data->freset);
Py_XINCREF(data->fdel);
Py_XINCREF(data->notify);
Py_XINCREF(data->doc);
return 1;
}
void PythonQtProperty_dealloc(PyObject* object)
{
PythonQtProperty* self = (PythonQtProperty*)object;
Py_CLEAR(self->data->fget);
Py_CLEAR(self->data->fset);
Py_CLEAR(self->data->freset);
Py_CLEAR(self->data->fdel);
Py_CLEAR(self->data->notify);
Py_CLEAR(self->data->doc);
delete self->data;
self->data = nullptr;
Py_TYPE(object)->tp_free(object);
}
PyObject* PythonQtProperty_setter(PyObject* object, PyObject* func)
{
PythonQtProperty* self = (PythonQtProperty*)object;
if (PyFunction_Check(func)) {
if (self->data->fset) {
Py_DECREF(self->data->fset);
}
Py_INCREF(func);
self->data->fset = func;
// return ourselves, so that setter can be used as a decorator
Py_INCREF(object);
return object;
} else {
PyErr_SetString(PyExc_TypeError, "Property needs a callable as fset.");
return nullptr;
}
}
PyObject* PythonQtProperty_getter(PyObject* object, PyObject* func)
{
PythonQtProperty* self = (PythonQtProperty*)object;
if (PyFunction_Check(func)) {
if (self->data->fget) {
Py_DECREF(self->data->fget);
}
Py_INCREF(func);
self->data->fget = func;
// return ourselves, so that setter can be used as a decorator
Py_INCREF(object);
return object;
} else {
PyErr_SetString(PyExc_TypeError, "Property needs a callable as fget.");
return nullptr;
}
}
PyObject* PythonQtProperty_call(PyObject* object, PyObject* args, PyObject* kw)
{
Q_UNUSED(kw)
if (PyTuple_Size(args) == 1) {
PyObject* func = PyTuple_GetItem(args, 0);
return PythonQtProperty_getter(object, func);
} else {
PyErr_SetString(PyExc_TypeError, "Property expects a single callable.");
return nullptr;
}
}
static PyMethodDef PythonQtProperty_methods[] = {
{"setter", (PyCFunction)PythonQtProperty_setter, METH_O, "Sets the fset function."},
{"getter", (PyCFunction)PythonQtProperty_getter, METH_O, "Sets the fget function."},
{"write", (PyCFunction)PythonQtProperty_setter, METH_O, "Sets the fset function."},
{"read", (PyCFunction)PythonQtProperty_getter, METH_O, "Sets the fget function."},
{nullptr, nullptr, 0, nullptr} /* Sentinel */
};
static PyObject* PythonQtProperty_get_doc(PythonQtProperty* self, void* /*closure*/)
{
if (self->data->doc) {
Py_INCREF(self->data->doc);
return self->data->doc;
} else {
//TODO: we could get the doc string from the fget method if no doc string is given...
Py_RETURN_NONE;
}
}
static PyGetSetDef PythonQtProperty_getsets[] = {
{const_cast<char*>("__doc__"), (getter)PythonQtProperty_get_doc, nullptr, nullptr},
{nullptr, nullptr, nullptr, nullptr},
};
PyDoc_STRVAR(PythonQtProperty_doc, "Property(type, fget=None, fset=None, freset=None, fdel=None, doc=None,\n"
" designable=True, scriptable=True, stored=True, user=False,\n"
" constant=False, final=False, notify=None) -> Property\n");
PyTypeObject PythonQtProperty_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0) /*tp_base*/
"PythonQt.QtCore.Property", /*tp_name*/
sizeof(PythonQtProperty), /*tp_basicsize*/
0, /*tp_itemsize*/
PythonQtProperty_dealloc, /*tp_dealloc*/
0, /*tp_vectorcall_offset*/
nullptr, /*tp_getattr*/
nullptr, /*tp_setattr*/
nullptr, /*tp_compare*/
nullptr, /*tp_repr*/
nullptr, /*tp_as_number*/
nullptr, /*tp_as_sequence*/
nullptr, /*tp_as_mapping*/
nullptr, /*tp_hash */
PythonQtProperty_call, /*tp_call*/
nullptr, /*tp_str*/
nullptr, /*tp_getattro*/
nullptr, /*tp_setattro*/
nullptr, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT, /*tp_flags*/
PythonQtProperty_doc, /*tp_doc */
nullptr, /*tp_traverse */
nullptr, /*tp_clear */
nullptr, /*tp_richcompare */
0, /*tp_weaklistoffset */
nullptr, /*tp_iter */
nullptr, /*tp_iternext */
PythonQtProperty_methods, /*tp_methods */
nullptr, /*tp_members */
PythonQtProperty_getsets, /*tp_getset */
nullptr, /*tp_base */
nullptr, /*tp_dict */
nullptr, /*tp_descr_get */
nullptr, /*tp_descr_set */
0, /*tp_dictoffset */
PythonQtProperty_init, /*tp_init */
nullptr, /*tp_alloc */
PyType_GenericNew, /*tp_new */
nullptr, /*tp_free */
nullptr, /*tp_is_gc */
nullptr, /*tp_bases */
nullptr, /*tp_mro */
nullptr, /*tp_cache */
nullptr, /*tp_subclasses */
nullptr, /*tp_weaklist */
nullptr, /*tp_del */
};
bool PythonQtPropertyData::callSetter(PyObject* wrapper, PyObject* newValue)
{
if (fset) {
PyObject* pyargs = PyTuple_New(2);
PyTuple_SET_ITEM(pyargs, 0, wrapper);
PyTuple_SET_ITEM(pyargs, 1, newValue);
Py_INCREF(wrapper);
Py_INCREF(newValue);
PyObject* result = PyObject_CallObject(fset, pyargs);
bool ok = (result != nullptr);
Py_XDECREF(result);
Py_DECREF(pyargs);
return ok;
} else {
PyErr_Format(PyExc_TypeError, "Property is read only.");
return false;
}
}
PyObject* PythonQtPropertyData::callGetter(PyObject* wrapper)
{
if (fget) {
PyObject* pyargs = PyTuple_New(1);
PyTuple_SET_ITEM(pyargs, 0, wrapper);
Py_INCREF(wrapper);
PyObject* value = PyObject_CallObject(fget, pyargs);
Py_DECREF(pyargs);
return value;
} else {
PyErr_Format(PyExc_TypeError, "Property is write only.");
return nullptr;
}
}
bool PythonQtPropertyData::callReset(PyObject* wrapper)
{
if (freset) {
PyObject* pyargs = PyTuple_New(1);
PyTuple_SET_ITEM(pyargs, 0, wrapper);
Py_INCREF(wrapper);
PyObject* result = PyObject_CallObject(freset, pyargs);
bool ok = (result != nullptr);
Py_XDECREF(result);
Py_DECREF(pyargs);
return ok;
} else {
PyErr_Format(PyExc_TypeError, "Property is not resettable.");
return false;
}
}
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