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// This implements the helpers for QMetaObject.
//
// Copyright (c) 2010 Riverbank Computing Limited <info@riverbankcomputing.com>
//
// This file is part of PyQt.
//
// This file may be used under the terms of the GNU General Public
// License versions 2.0 or 3.0 as published by the Free Software
// Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
// included in the packaging of this file. Alternatively you may (at
// your option) use any later version of the GNU General Public
// License if such license has been publicly approved by Riverbank
// Computing Limited (or its successors, if any) and the KDE Free Qt
// Foundation. In addition, as a special exception, Riverbank gives you
// certain additional rights. These rights are described in the Riverbank
// GPL Exception version 1.1, which can be found in the file
// GPL_EXCEPTION.txt in this package.
//
// Please review the following information to ensure GNU General
// Public Licensing requirements will be met:
// http://trolltech.com/products/qt/licenses/licensing/opensource/. If
// you are unsure which license is appropriate for your use, please
// review the following information:
// http://trolltech.com/products/qt/licenses/licensing/licensingoverview
// or contact the sales department at sales@riverbankcomputing.com.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#include <Python.h>
#include <QByteArray>
#include <QMetaMethod>
#include <QMetaObject>
#include <QObject>
#include "qpycore_chimera.h"
#include "qpycore_misc.h"
#include "qpycore_sip.h"
// Forward declarations.
static void connect(QObject *qobj, PyObject *slot_obj,
const QByteArray &slot_nm, const QByteArray &args);
void qpycore_qmetaobject_connectslotsbyname(QObject *qobj,
PyObject *qobj_wrapper)
{
// Get the class attributes.
PyObject *dir = PyObject_Dir((PyObject *)Py_TYPE(qobj_wrapper));
if (!dir)
return;
PyObject *slot_obj = 0;
for (SIP_SSIZE_T li = 0; li < PyList_GET_SIZE(dir); ++li)
{
PyObject *name_obj = PyList_GET_ITEM(dir, li);
// Get the slot object.
Py_XDECREF(slot_obj);
slot_obj = PyObject_GetAttr(qobj_wrapper, name_obj);
if (!slot_obj)
continue;
// Ignore it if it is not a callable.
if (!PyCallable_Check(slot_obj))
continue;
// Use the signature attribute instead of the name if there is one.
PyObject *sigattr = PyObject_GetAttr(slot_obj,
qpycore_signature_attr_name);
if (sigattr)
{
for (SIP_SSIZE_T i = 0; i < PyList_GET_SIZE(sigattr); ++i)
{
PyObject *decoration = PyList_GET_ITEM(sigattr, i);
Chimera::Signature *sig = Chimera::Signature::fromPyObject(decoration);
QByteArray args = sig->arguments();
if (!args.isEmpty())
connect(qobj, slot_obj, sig->name(), args);
}
Py_DECREF(sigattr);
}
else
{
const char *ascii_name = sipString_AsASCIIString(&name_obj);
if (!ascii_name)
continue;
PyErr_Clear();
connect(qobj, slot_obj, QByteArray(ascii_name), QByteArray());
Py_DECREF(name_obj);
}
}
Py_XDECREF(slot_obj);
Py_DECREF(dir);
}
// Connect up a particular slot name, with optional arguments.
static void connect(QObject *qobj, PyObject *slot_obj,
const QByteArray &slot_nm, const QByteArray &args)
{
// Ignore if it's not an autoconnect slot.
if (!slot_nm.startsWith("on_"))
return;
// Extract the names of the emitting object and the signal.
int i;
i = slot_nm.lastIndexOf('_');
if (i - 3 < 1 || i + 1 >= slot_nm.size())
return;
QByteArray ename = slot_nm.mid(3, i - 3);
QByteArray sname = slot_nm.mid(i + 1);
// Find the emitting object and get its meta-object.
#if defined(QT_NO_MEMBER_TEMPLATES)
QObject *eobj = qFindChild<QObject *>(qobj, ename);
#else
QObject *eobj = qobj->findChild<QObject *>(ename);
#endif
if (!eobj)
return;
const QMetaObject *mo = eobj->metaObject();
// Got through the methods looking for a matching signal.
PyObject *epyobj = 0;
for (int m = 0; m < mo->methodCount(); ++m)
{
QMetaMethod mm = mo->method(m);
if (mm.methodType() != QMetaMethod::Signal)
continue;
QByteArray sig(mm.signature());
if (Chimera::Signature::name(sig) != sname)
continue;
// If we have slot arguments then they must match as well.
if (!args.isEmpty() && Chimera::Signature::arguments(sig) != args)
continue;
// Add the type character.
sig.prepend('2');
// Get the wrapper now we know it is needed.
if (!epyobj)
{
epyobj = sipConvertFromType(eobj, sipType_QObject, 0);
if (!epyobj)
break;
}
// Connect the signal.
PyObject *res = sipConnectRx(epyobj, sig.constData(), slot_obj, 0, 0);
Py_XDECREF(res);
}
Py_XDECREF(epyobj);
}
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