// Create a dynamic meta-object for a Python type by introspecting its
// attributes. Note that it leaks if the type is deleted.
static int create_dynamic_metaobject(pyqtWrapperType *pyqt_wt)
{
PyTypeObject *pytype = (PyTypeObject *)pyqt_wt;
qpycore_metaobject *qo = new qpycore_metaobject;
QMetaObjectBuilder builder;
// Get any class info.
QList<ClassInfo> class_info_list = qpycore_get_class_info_list();
// Get any enums/flags.
QList<EnumsFlags> enums_flags_list = qpycore_get_enums_flags_list();
// Get the super-type's meta-object.
builder.setSuperClass(get_qmetaobject((pyqtWrapperType *)pytype->tp_base));
// Get the name of the type. Dynamic types have simple names.
builder.setClassName(pytype->tp_name);
// Go through the class hierarchy getting all PyQt properties, slots and
// signals.
QList<const qpycore_pyqtSignal *> psigs;
QMap<uint, PropertyData> pprops;
if (trawl_hierarchy(pytype, qo, builder, psigs, pprops) < 0)
return -1;
qo->nr_signals = psigs.count();
// Initialise the header section of the data table. Note that Qt v4.5
// introduced revision 2 which added constructors. However the design is
// broken in that the static meta-call function doesn't provide enough
// information to determine which Python sub-class of a Qt class is to be
// created. So we stick with revision 1 (and don't allow pyqtSlot() to
// decorate __init__).
// Set up any class information.
for (int i = 0; i < class_info_list.count(); ++i)
{
const ClassInfo &ci = class_info_list.at(i);
builder.addClassInfo(ci.first, ci.second);
}
// Set up any enums/flags.
for (int i = 0; i < enums_flags_list.count(); ++i)
{
const EnumsFlags &ef = enums_flags_list.at(i);
QByteArray scoped_name(pytype->tp_name);
scoped_name.append("::");
scoped_name.append(ef.name);
QMetaEnumBuilder enum_builder = builder.addEnumerator(scoped_name);
enum_builder.setIsFlag(ef.isFlag);
QHash<QByteArray, int>::const_iterator it = ef.keys.constBegin();
while (it != ef.keys.constEnd())
{
enum_builder.addKey(it.key(), it.value());
++it;
}
}
// Add the signals to the meta-object.
for (int g = 0; g < qo->nr_signals; ++g)
{
const qpycore_pyqtSignal *ps = psigs.at(g);
QMetaMethodBuilder signal_builder = builder.addSignal(
ps->parsed_signature->signature.mid(1));
if (ps->parameter_names)
signal_builder.setParameterNames(*ps->parameter_names);
signal_builder.setRevision(ps->revision);
}
// Add the slots to the meta-object.
for (int s = 0; s < qo->pslots.count(); ++s)
{
const Chimera::Signature *slot_signature = qo->pslots.at(s)->slotSignature();
const QByteArray &sig = slot_signature->signature;
QMetaMethodBuilder slot_builder = builder.addSlot(sig);
// Add any type.
if (slot_signature->result)
slot_builder.setReturnType(slot_signature->result->name());
slot_builder.setRevision(slot_signature->revision);
}
// Add the properties to the meta-object.
QMapIterator<uint, PropertyData> it(pprops);
for (int p = 0; it.hasNext(); ++p)
{
it.next();
const PropertyData &pprop = it.value();
const char *prop_name = SIPBytes_AS_STRING(pprop.first);
qpycore_pyqtProperty *pp = (qpycore_pyqtProperty *)pprop.second;
int notifier_id;
if (pp->pyqtprop_notify)
{
qpycore_pyqtSignal *ps = (qpycore_pyqtSignal *)pp->pyqtprop_notify;
const QByteArray &sig = ps->parsed_signature->signature;
notifier_id = builder.indexOfSignal(sig.mid(1));
if (notifier_id < 0)
{
PyErr_Format(PyExc_TypeError,
"the notify signal '%s' was not defined in this class",
sig.constData() + 1);
// Note that we leak the property name.
return -1;
}
}
else
{
notifier_id = -1;
}
// A Qt v5 revision 7 meta-object holds the QMetaType::Type of the type
// or its name if it is unresolved (ie. not known to the type system).
// In Qt v4 both are held. For QObject sub-classes Chimera will fall
// back to the QMetaType::QObjectStar if there is no specific meta-type
// for the sub-class. This means that, for Qt v4,
// QMetaProperty::read() can handle the type. However, Qt v5 doesn't
// know that the unresolved type is a QObject sub-class. Therefore we
// have to tell it that the property is a QObject, rather than the
// sub-class. This means that QMetaProperty.typeName() will always
// return "QObject*".
QByteArray prop_type;
if (pp->pyqtprop_parsed_type->metatype() == QMetaType::QObjectStar)
{
// However, if the type is a Python sub-class of QObject then we
// use the name of the Python type. This anticipates that the type
// is one that will be proxied by QML at some point.
if (pp->pyqtprop_parsed_type->typeDef() == sipType_QObject)
{
prop_type = ((PyTypeObject *)pp->pyqtprop_parsed_type->py_type())->tp_name;
prop_type.append('*');
}
else
{
prop_type = "QObject*";
}
}
else
{
prop_type = pp->pyqtprop_parsed_type->name();
}
QMetaPropertyBuilder prop_builder = builder.addProperty(prop_name,
prop_type, notifier_id);
// Reset the defaults.
prop_builder.setReadable(false);
prop_builder.setWritable(false);
// Enum or flag.
if (pp->pyqtprop_parsed_type->isEnum() || pp->pyqtprop_parsed_type->isFlag())
{
prop_builder.setEnumOrFlag(true);
}
if (pp->pyqtprop_get && PyCallable_Check(pp->pyqtprop_get))
{
// Readable.
prop_builder.setReadable(true);
}
if (pp->pyqtprop_set && PyCallable_Check(pp->pyqtprop_set))
{
// Writable.
prop_builder.setWritable(true);
// See if the name of the setter follows the Designer convention.
// If so tell the UI compilers not to use setProperty().
PyObject *setter_name_obj = PyObject_GetAttr(pp->pyqtprop_set,
qpycore_dunder_name);
if (setter_name_obj)
{
PyObject *ascii_obj = setter_name_obj;
const char *ascii = sipString_AsASCIIString(&ascii_obj);
Py_DECREF(setter_name_obj);
if (ascii)
{
if (qstrlen(ascii) > 3 && ascii[0] == 's' &&
ascii[1] == 'e' && ascii[2] == 't' &&
ascii[3] == toupper(prop_name[0]) &&
qstrcmp(&ascii[4], &prop_name[1]) == 0)
prop_builder.setStdCppSet(true);
}
Py_DECREF(ascii_obj);
}
PyErr_Clear();
}
if (pp->pyqtprop_reset && PyCallable_Check(pp->pyqtprop_reset))
{
// Resetable.
prop_builder.setResettable(true);
}
// Add the property flags. Note that Qt4 always seems to have
// ResolveEditable set but QMetaObjectBuilder doesn't provide an API
// call to do it.
prop_builder.setDesignable(pp->pyqtprop_flags & 0x00001000);
prop_builder.setScriptable(pp->pyqtprop_flags & 0x00004000);
prop_builder.setStored(pp->pyqtprop_flags & 0x00010000);
prop_builder.setUser(pp->pyqtprop_flags & 0x00100000);
prop_builder.setConstant(pp->pyqtprop_flags & 0x00000400);
prop_builder.setFinal(pp->pyqtprop_flags & 0x00000800);
prop_builder.setRevision(pp->pyqtprop_revision);
// Save the property data for qt_metacall(). (We already have a
// reference.)
qo->pprops.append(pp);
// We've finished with the property name.
Py_DECREF(pprop.first);
}
// Initialise the rest of the meta-object.
qo->mo = builder.toMetaObject();
// Save the meta-object.
pyqt_wt->metaobject = qo;
return 0;
}
static void clone(QMetaObjectBuilder &builder, const QMetaObject *mo,
const QMetaObject *ignoreStart, const QMetaObject *ignoreEnd)
{
// Set classname
builder.setClassName(ignoreEnd->className());
// Clone Q_CLASSINFO
for (int ii = mo->classInfoOffset(); ii < mo->classInfoCount(); ++ii) {
QMetaClassInfo info = mo->classInfo(ii);
int otherIndex = ignoreEnd->indexOfClassInfo(info.name());
if (otherIndex >= ignoreStart->classInfoOffset() + ignoreStart->classInfoCount()) {
// Skip
} else {
builder.addClassInfo(info.name(), info.value());
}
}
// Clone Q_PROPERTY
for (int ii = mo->propertyOffset(); ii < mo->propertyCount(); ++ii) {
QMetaProperty property = mo->property(ii);
int otherIndex = ignoreEnd->indexOfProperty(property.name());
if (otherIndex >= ignoreStart->propertyOffset() + ignoreStart->propertyCount()) {
builder.addProperty(QByteArray("__qml_ignore__") + property.name(), QByteArray("void"));
// Skip
} else {
builder.addProperty(property);
}
}
// Clone Q_METHODS
for (int ii = mo->methodOffset(); ii < mo->methodCount(); ++ii) {
QMetaMethod method = mo->method(ii);
// More complex - need to search name
QByteArray name = method.name();
bool found = false;
for (int ii = ignoreStart->methodOffset() + ignoreStart->methodCount();
!found && ii < ignoreEnd->methodOffset() + ignoreEnd->methodCount();
++ii) {
QMetaMethod other = ignoreEnd->method(ii);
found = name == other.name();
}
QMetaMethodBuilder m = builder.addMethod(method);
if (found) // SKIP
m.setAccess(QMetaMethod::Private);
}
// Clone Q_ENUMS
for (int ii = mo->enumeratorOffset(); ii < mo->enumeratorCount(); ++ii) {
QMetaEnum enumerator = mo->enumerator(ii);
int otherIndex = ignoreEnd->indexOfEnumerator(enumerator.name());
if (otherIndex >= ignoreStart->enumeratorOffset() + ignoreStart->enumeratorCount()) {
// Skip
} else {
builder.addEnumerator(enumerator);
}
}
}
