C++ base::PyException类代码示例

std::vector<App::DocumentObject*> ViewProviderPythonFeatureImp::claimChildren(const std::vector<App::DocumentObject*>& base) const 
{
    std::vector<App::DocumentObject*> children;
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("claimChildren"))) {
                Py::Callable method(vp.getAttr(std::string("claimChildren")));
                Py::Tuple args(0);
                Py::Sequence list(method.apply(args));
                for (Py::Sequence::iterator it = list.begin(); it != list.end(); ++it) {
                    PyObject* item = (*it).ptr();
                    if (PyObject_TypeCheck(item, &(App::DocumentObjectPy::Type))) {
                        App::DocumentObject* obj = static_cast<App::DocumentObjectPy*>(item)->getDocumentObjectPtr();
                        children.push_back(obj);
                    }
                }
            }
            else {
                children = base;
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        Base::Console().Error("ViewProviderPythonFeature::claimChildren: %s\n", e.what());
    }

    return children;
}

DocumentObjectExecReturn *FeaturePythonImp::execute()
{
    // Run the execute method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == PropertyPythonObject::getClassTypeId()) {
            Py::Object feature = static_cast<PropertyPythonObject*>(proxy)->getValue();
            if (feature.hasAttr("__object__")) {
                Py::Callable method(feature.getAttr(std::string("execute")));
                Py::Tuple args(0);
                method.apply(args);
            }
            else {
                Py::Callable method(feature.getAttr(std::string("execute")));
                Py::Tuple args(1);
                args.setItem(0, Py::Object(object->getPyObject(), true));
                method.apply(args);
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
        std::stringstream str;
        str << object->Label.getValue() << ": " << e.what();
        return new App::DocumentObjectExecReturn(str.str());
    }

    return DocumentObject::StdReturn;
}

bool ViewProviderPythonFeatureImp::setEdit(int ModNum)
{
    // Run the onChanged method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("setEdit"))) {
                if (vp.hasAttr("__object__")) {
                    Py::Callable method(vp.getAttr(std::string("setEdit")));
                    Py::Tuple args(1);
                    args.setItem(0, Py::Int(ModNum));
                    Py::Boolean ok(method.apply(args));
                    return (bool)ok;
                }
                else {
                    Py::Callable method(vp.getAttr(std::string("setEdit")));
                    Py::Tuple args(2);
                    args.setItem(0, Py::Object(object->getPyObject(), true));
                    args.setItem(1, Py::Int(ModNum));
                    Py::Boolean ok(method.apply(args));
                    return (bool)ok;
                }
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        const char* name = object->getObject()->Label.getValue();
        Base::Console().Error("ViewProviderPythonFeature::setEdit (%s): %s\n", name, e.what());
    }

    return false;
}

std::string PropertyPythonObject::toString() const
{
    std::string repr;
    Base::PyGILStateLocker lock;
    try {
        Py::Module pickle(PyImport_ImportModule("json"),true);
        Py::Callable method(pickle.getAttr(std::string("dumps")));
        Py::Object dump;
        if (this->object.hasAttr("__getstate__")) {
            Py::Tuple args;
            Py::Callable state(this->object.getAttr("__getstate__"));
            dump = state.apply(args);
        }
        else if (this->object.hasAttr("__dict__")) {
            dump = this->object.getAttr("__dict__");
        }
        else {
            dump = this->object;
        }

        Py::Tuple args(1);
        args.setItem(0, dump);
        Py::Object res = method.apply(args);
        Py::String str(res);
        repr = str.as_std_string("ascii");
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }

    return repr;
}

void FeaturePythonImp::onChanged(const Property* prop)
{
    // Run the execute method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == PropertyPythonObject::getClassTypeId()) {
            Py::Object feature = static_cast<PropertyPythonObject*>(proxy)->getValue();
            if (feature.hasAttr(std::string("onChanged"))) {
                if (feature.hasAttr("__object__")) {
                    Py::Callable method(feature.getAttr(std::string("onChanged")));
                    Py::Tuple args(1);
                    std::string prop_name = object->getName(prop);
                    args.setItem(0, Py::String(prop_name));
                    method.apply(args);
                }
                else {
                    Py::Callable method(feature.getAttr(std::string("onChanged")));
                    Py::Tuple args(2);
                    args.setItem(0, Py::Object(object->getPyObject(), true));
                    std::string prop_name = object->getName(prop);
                    args.setItem(1, Py::String(prop_name));
                    method.apply(args);
                }
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }
}

void ViewProviderPythonFeatureImp::attach(App::DocumentObject *pcObject)
{
    // Run the attach method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("attach"))) {
                if (vp.hasAttr("__object__")) {
                    Py::Callable method(vp.getAttr(std::string("attach")));
                    Py::Tuple args(0);
                    method.apply(args);
                }
                else {
                    Py::Callable method(vp.getAttr(std::string("attach")));
                    Py::Tuple args(1);
                    args.setItem(0, Py::Object(object->getPyObject(), true));
                    method.apply(args);
                }

                // #0000415: Now simulate a property change event to call
                // claimChildren if implemented.
                pcObject->Label.touch();
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        const char* name = object->getObject()->Label.getValue();
        Base::Console().Error("ViewProviderPythonFeature::attach (%s): %s\n", name, e.what());
    }
}

ViewProviderPythonFeatureImp::ValueT
ViewProviderPythonFeatureImp::canDropObject(App::DocumentObject* obj) const
{
    // Run the onChanged method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("canDropObject"))) {
                Py::Callable method(vp.getAttr(std::string("canDropObject")));
                Py::Tuple args(1);
                args.setItem(0, Py::Object(obj->getPyObject(), true));
                Py::Boolean ok(method.apply(args));
                return static_cast<bool>(ok) ? Accepted : Rejected;
            }
            else {
                return NotImplemented;
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }

    return Rejected;
}

void PropertyPythonObject::fromString(const std::string& repr)
{
    Base::PyGILStateLocker lock;
    try {
        Py::Module pickle(PyImport_ImportModule("json"),true);
        Py::Callable method(pickle.getAttr(std::string("loads")));
        Py::Tuple args(1);
        args.setItem(0, Py::String(repr));
        Py::Object res = method.apply(args);

        if (this->object.hasAttr("__setstate__")) {
            Py::Tuple args(1);
            args.setItem(0, res);
            Py::Callable state(this->object.getAttr("__setstate__"));
            state.apply(args);
        }
        else if (this->object.hasAttr("__dict__")) {
            this->object.setAttr("__dict__", res);
        }
        else {
            this->object = res;
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }
}

const char* ViewProviderPythonFeatureImp::getDefaultDisplayMode() const
{
    // Run the getDefaultDisplayMode method of the proxy object.
    Base::PyGILStateLocker lock;
    static std::string mode;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("getDefaultDisplayMode"))) {
                Py::Callable method(vp.getAttr(std::string("getDefaultDisplayMode")));
                Py::Tuple args;
                Py::String str(method.apply(args));
                //if (str.isUnicode())
                //    str = str.encode("ascii"); // json converts strings into unicode
                mode = str.as_std_string("ascii");
                return mode.c_str();
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }

    return 0;
}

void PythonGroupCommand::activated(int iMsg)
{
    try {
        Gui::ActionGroup* pcAction = qobject_cast<Gui::ActionGroup*>(_pcAction);
        QList<QAction*> a = pcAction->actions();
        assert(iMsg < a.size());
        QAction* act = a[iMsg];

        Base::PyGILStateLocker lock;
        Py::Object cmd(_pcPyCommand);
        if (cmd.hasAttr("Activated")) {
            Py::Callable call(cmd.getAttr("Activated"));
            Py::Tuple args(1);
            args.setItem(0, Py::Int(iMsg));
            Py::Object ret = call.apply(args);
        }
        // If the command group doesn't implement the 'Activated' method then invoke the command directly
        else {
            Gui::CommandManager &rcCmdMgr = Gui::Application::Instance->commandManager();
            rcCmdMgr.runCommandByName(act->property("CommandName").toByteArray());
        }

        // Since the default icon is reset when enabing/disabling the command we have
        // to explicitly set the icon of the used command.
        pcAction->setIcon(a[iMsg]->icon());
    }
    catch(Py::Exception&) {
        Base::PyGILStateLocker lock;
        Base::PyException e;
        Base::Console().Error("Running the Python command '%s' failed:\n%s\n%s",
                              sName, e.getStackTrace().c_str(), e.what());
    }
}

SoDetail* ViewProviderPythonFeatureImp::getDetail(const char* name) const
{
    // Run the onChanged method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("getDetail"))) {
                Py::Callable method(vp.getAttr(std::string("getDetail")));
                Py::Tuple args(1);
                args.setItem(0, Py::String(name));
                Py::Object det(method.apply(args));
                void* ptr = 0;
                Base::Interpreter().convertSWIGPointerObj("pivy.coin", "SoDetail *", det.ptr(), &ptr, 0);
                SoDetail* detail = reinterpret_cast<SoDetail*>(ptr);
                return detail ? detail->copy() : 0;
            }
        }
    }
    catch (const Base::Exception& e) {
        e.ReportException();
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }

    return 0;
}

std::string ViewProviderPythonFeatureImp::getElement(const SoDetail *det) const
{
    // Run the onChanged method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("getElement"))) {
                PyObject* pivy = 0;
                // Note: As there is no ref'counting mechanism for the SoDetail class we must
                // pass '0' as the last parameter so that the Python object does not 'own'
                // the detail object.
                pivy = Base::Interpreter().createSWIGPointerObj("pivy.coin", "SoDetail *", (void*)det, 0);
                Py::Callable method(vp.getAttr(std::string("getElement")));
                Py::Tuple args(1);
                args.setItem(0, Py::Object(pivy, true));
                Py::String name(method.apply(args));
                return (std::string)name;
            }
        }
    }
    catch (const Base::Exception& e) {
        e.ReportException();
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }

    return "";
}

void PropertyPythonObject::loadPickle(const std::string& str)
{
    // find the custom attributes and restore them
    Base::PyGILStateLocker lock;
    try {
        std::string buffer = str;
        boost::regex pickle("S'(\\w+)'.+S'(\\w+)'\\n");
        boost::match_results<std::string::const_iterator> what;
        std::string::const_iterator start, end;
        start = buffer.begin();
        end = buffer.end();
        while (boost::regex_search(start, end, what, pickle)) {
            std::string key = std::string(what[1].first, what[1].second);
            std::string val = std::string(what[2].first, what[2].second);
            this->object.setAttr(key, Py::String(val));
            buffer = std::string(what[2].second, end);
            start = buffer.begin();
            end = buffer.end();
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        e.ReportException();
    }
}

Action * PythonGroupCommand::createAction(void)
{
    Gui::ActionGroup* pcAction = new Gui::ActionGroup(this, Gui::getMainWindow());
    pcAction->setDropDownMenu(true);

    applyCommandData(this->getName(), pcAction);

    int defaultId = 0;

    try {
        Base::PyGILStateLocker lock;
        Py::Object cmd(_pcPyCommand);

        Py::Callable call(cmd.getAttr("GetCommands"));
        Py::Tuple args;
        Py::Tuple ret(call.apply(args));
        for (Py::Tuple::iterator it = ret.begin(); it != ret.end(); ++it) {
            Py::String str(*it);
            QAction* cmd = pcAction->addAction(QString());
            cmd->setProperty("CommandName", QByteArray(static_cast<std::string>(str).c_str()));
        }

        if (cmd.hasAttr("GetDefaultCommand")) {
            Py::Callable call2(cmd.getAttr("GetDefaultCommand"));
            Py::Int def(call2.apply(args));
            defaultId = static_cast<int>(def);
        }
    }
    catch(Py::Exception&) {
        Base::PyGILStateLocker lock;
        Base::PyException e;
        Base::Console().Error("createAction() of the Python command '%s' failed:\n%s\n%s",
                              sName, e.getStackTrace().c_str(), e.what());
    }

    _pcAction = pcAction;
    languageChange();

    if (strcmp(getResource("Pixmap"),"") != 0) {
        pcAction->setIcon(Gui::BitmapFactory().iconFromTheme(getResource("Pixmap")));
    }
    else {
        QList<QAction*> a = pcAction->actions();
        // if out of range then set to 0
        if (defaultId < 0 || defaultId >= a.size())
            defaultId = 0;
        if (a.size() > defaultId)
            pcAction->setIcon(a[defaultId]->icon());
    }

    pcAction->setProperty("defaultAction", QVariant(defaultId));

    return pcAction;
}

QIcon ViewProviderPythonFeatureImp::getIcon() const
{
    // default icon
    //static QPixmap px = BitmapFactory().pixmap("Tree_Python");

    // Run the getIcon method of the proxy object.
    Base::PyGILStateLocker lock;
    try {
        App::Property* proxy = object->getPropertyByName("Proxy");
        if (proxy && proxy->getTypeId() == App::PropertyPythonObject::getClassTypeId()) {
            Py::Object vp = static_cast<App::PropertyPythonObject*>(proxy)->getValue();
            if (vp.hasAttr(std::string("getIcon"))) {
                Py::Callable method(vp.getAttr(std::string("getIcon")));
                Py::Tuple args(0);
                Py::String str(method.apply(args));
                std::string content = str.as_std_string();
                QPixmap icon;
                // Check if the passed string is a filename, otherwise treat as xpm data
                QFileInfo fi(QString::fromAscii(content.c_str()));
                if (fi.isFile() && fi.exists()) {
                    icon.load(fi.absoluteFilePath());
                } else {
                    QByteArray ary;
                    int strlen = (int)content.size();
                    ary.resize(strlen);
                    for (int j=0; j<strlen; j++)
                        ary[j]=content[j];
                    // Make sure to remove crap around the XPM data
                    QList<QByteArray> lines = ary.split('\n');
                    QByteArray buffer;
                    buffer.reserve(ary.size()+lines.size());
                    for (QList<QByteArray>::iterator it = lines.begin(); it != lines.end(); ++it) {
                        QByteArray trim = it->trimmed();
                        if (!trim.isEmpty()) {
                            buffer.append(trim);
                            buffer.append('\n');
                        }
                    }
                    icon.loadFromData(buffer, "XPM");
                }
                if (!icon.isNull()) {
                    return icon;
                }
            }
        }
    }
    catch (Py::Exception&) {
        Base::PyException e; // extract the Python error text
        Base::Console().Error("ViewProviderPythonFeature::getIcon: %s\n", e.what());
    }

    return QIcon();
}