1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
|
// This implements the helper for QObject.__getattr__().
//
// Copyright (c) 2014 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.
//
// If you are unsure which license is appropriate for your use, please
// 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 <QHash>
#include <QMetaMethod>
#include <QObject>
#include "qpycore_pyqtboundsignal.h"
#include "qpycore_pyqtmethodproxy.h"
#include "qpycore_pyqtsignal.h"
// See if we can find an attribute in the Qt meta-type system. This is
// primarily to support access to JavaScript (e.g. QDeclarativeItem) so we
// don't support overloads.
PyObject *qpycore_qobject_getattr(QObject *qobj, PyObject *py_qobj,
const char *name)
{
const QMetaObject *mo = qobj->metaObject();
// Try and find a method with the name.
QMetaMethod method;
int method_index = -1;
// Count down to allow overrides (assuming they are possible).
for (int m = mo->methodCount() - 1; m >= 0; --m)
{
method = mo->method(m);
#if QT_VERSION >= 0x040500
if (method.methodType() == QMetaMethod::Constructor)
continue;
#endif
// Get the method name.
#if QT_VERSION >= 0x050000
QByteArray mname(method.methodSignature());
#else
QByteArray mname(method.signature());
#endif
int idx = mname.indexOf('(');
if (idx >= 0)
mname.truncate(idx);
if (mname == name)
{
method_index = m;
break;
}
}
if (method_index < 0)
{
// Replicate the standard Python exception.
PyErr_Format(PyExc_AttributeError, "'%s' object has no attribute '%s'",
Py_TYPE(py_qobj)->tp_name, name);
return 0;
}
// Get the value to return. Note that this is recreated each time. We
// could put a descriptor in the type dictionary to satisfy the request in
// future but the typical use case is getting a value from a C++ proxy
// (e.g. QDeclarativeItem) and we can't assume that what is being proxied
// is the same each time.
PyObject *value;
if (method.methodType() == QMetaMethod::Signal)
{
// We need to keep explicit references to the unbound signals (because
// we don't use the type dictionary to do so) because they own the
// parsed signature which may be needed by a PyQtProxy at some point.
typedef QHash<QByteArray, PyObject *> SignalHash;
static SignalHash *sig_hash = 0;
// For crappy compilers.
if (!sig_hash)
sig_hash = new SignalHash;
PyObject *sig_obj;
#if QT_VERSION >= 0x050000
QByteArray sig_str(method.methodSignature());
#else
QByteArray sig_str(method.signature());
#endif
SignalHash::const_iterator it = sig_hash->find(sig_str);
if (it == sig_hash->end())
{
sig_obj = (PyObject *)qpycore_pyqtSignal_New(sig_str.constData());
if (!sig_obj)
return 0;
sig_hash->insert(sig_str, sig_obj);
}
else
{
sig_obj = it.value();
}
value = qpycore_pyqtBoundSignal_New((qpycore_pyqtSignal *)sig_obj,
py_qobj, qobj);
}
else
{
QByteArray py_name(Py_TYPE(py_qobj)->tp_name);
py_name.append('.');
py_name.append(name);
value = qpycore_pyqtMethodProxy_New(qobj, method_index, py_name);
}
return value;
}
|