signal) { qWarning("QObject::connect: invalid nullptr parameter"); if (slotObj) slotObj->destroyIfLastRef(); return QMetaObject::Connection(); } int signal_index = -1; void *args[] = { &signal_index, signal }; // 根据调用来判断是否存在信号,如果当前类没有就去父类中寻找 // 直到...
{if(!signal) { qCWarning(lcConnect,"QObject::connect: invalid nullptr parameter");if(slotObj) slotObj->destroyIfLastRef();returnQMetaObject::Connection(); }intsignal_index = -1;void*args[] = { &signal_index, signal };for(; senderMetaObject && signal_index <0; senderMetaObject = sende...
: "Unknown"; qWarning("QObject::connect(%s, %s): invalid nullptr parameter", senderString, receiverString); if (slotObj) slotObj->destroyIfLastRef(); return QMetaObject::Connection(); }//同QT4 QObject *s = const_cast<QObject *>(sender); QObject *r = const_cast<QObject *>(receive...
*/// Convert a wchar_t to char string, equivalent to QString::toLocal8Bit()// when passed CP_ACP.staticinline char*wideToMulti(int codePage,constwchar_t*aw){constint required=WideCharToMultiByte(codePage,0,aw,-1,NULL,0,NULL,NULL);char*result=newchar[required];WideCharToMultiByte(codePage...
senderMetaObject) { qWarning("QObject::connect: invalid null parameter"); if (slotObj) slotObj->destroyIfLastRef(); return QMetaObject::Connection(); } //2 去除const 属性 QObject *s = const_cast<QObject *>(sender); QObject *r = const_cast<QObject *>(receiver); QOrderedMutexLocker...
); mqtt::token_ptr subtok = client_.subscribe(topic_.toStdString(), QOS,nullptr, cb_)...
OpenGLWidget(QWidget *parent = nullptr); ~OpenGLWidget(); void initializeGL() override; void resizeGL(int w, int h) override; void paintGL() override; private: QOpenGLShaderProgram m_shaderProgram; QOpenGLBuffer m_vertexBuffer; QOpenGLVertexArrayObject m_vao; }; 在这个示例中,我们创建了一个...
首选项错误码:code:"401” err: Error: Parameter error. The type of 'value' must be ValueType. 如何排查问题 如何查看或导出持久化数据? 如何获知数据存储沙箱路径? 插入数据之后,RDB数据库的wal文件体积异常 用户首选项是线程安全的吗 为什么在关系型数据库中调用deleteRdbStore函数后并未真实删除数据...
short toShort(bool *ok = nullptr, int base = 10) const std::string toStdString() const std::u16string toStdU16String() const std::u32string toStdU32String() const std::wstring toStdWString() const uint toUInt(bool *ok = nullptr, int base = 10) const ulong toULong(bool *ok =...
signal) {qWarning("QObject::connect: invalid nullptr parameter");if (slotObj)slotObj->destroyIfLastRef();return QMetaObject::Connection();}int signal_index = -1;void *args[] = { &signal_index, signal };// 根据调用来判断是否存在信号,如果当前类没有就去父类中寻找// 直到找到信号或者是...