Qiodevice

You can qiodevice write to the device with write or putCharand read by calling either readreadLineor readAll. Call close when you are done with the device, qiodevice. QIODevice distinguishes between two types of devices: random-access devices and sequential devices, qiodevice. Random-access devices qiodevice seeking to arbitrary positions using seek.

QtCreator KDevelop Solarized. You can then write to the device with write or putChar , and read by calling either read , readLine , or readAll. Call close when you are done with the device. The current position in the file is available by calling pos. QFile and QBuffer are examples of random-access devices.

Qiodevice

The PySide. QIODevice provides both a common implementation and an abstract interface for devices that support reading and writing of blocks of data, such as PySide. QFile , PySide. QBuffer and PySide. QIODevice pointer, allowing them to be used with various devices such as files and buffers. Before accessing the device, PySide. You can then write to the device with PySide. Call PySide. QIODevice distinguishes between two types of devices: random-access devices and sequential devices. You can use PySide.

Fail if the file to be opened already exists. For example, if several users open the same device and read it character by character, qiodevice, they may qiodevice up reading the same data when they meant to read a separate chunk each. See also setOpenMode and OpenMode, qiodevice.

Base class for QIODevice that provides flags describing the mode in which a device is opened. This enum is used with QIODevice::open to describe the mode in which a device is opened. Certain flags, such as Unbuffered and Truncate , are meaningless when used with some subclasses. Some of these restrictions are implied by the type of device that is represented by a subclass. In other cases, the restriction may be due to the implementation, or may be imposed by the underlying platform; for example, QTcpSocket does not support Unbuffered mode, and limitations in the native API prevent QFile from supporting Unbuffered on Windows.

You can then write to the device with write or putChar , and read by calling either read , readLine , or readAll. Call close when you are done with the device. QIODevice distinguishes between two types of devices: random-access devices and sequential devices. Random-access devices support seeking to arbitrary positions using seek. The current position in the file is available by calling pos.

Qiodevice

More …. We always welcome contributions to the snippet translation. You can then write to the device with write or putChar , and read by calling either read , readLine , or readAll. Call close when you are done with the device. QIODevice distinguishes between two types of devices: random-access devices and sequential devices. Random-access devices support seeking to arbitrary positions using seek. The current position in the file is available by calling pos.

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If msecs is -1, this function will not time out. This signal is emitted when new data is available for reading from the device. If an error occurred, -1 is returned. All other trademarks are property of their respective owners. Returns true if data can be written to the device; otherwise returns false. QIODevice distinguishes between two types of devices: random-access devices and sequential devices. Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. Reimplement this function when creating a subclass of QIODevice. This is an overloaded member function, provided for convenience. Returns true if a complete line of data can be read from the device; otherwise returns false. Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. This virtual function is called when something has been disconnected from signal in this object. Sequential devices, as opposed to a random-access devices, have no concept of a start, an end, a size, or a current position, and they do not support seeking.

Base class for QIODevice that provides flags describing the mode in which a device is opened. This enum is used with QIODevice::open to describe the mode in which a device is opened. Certain flags, such as Unbuffered and Truncate , are meaningless when used with some subclasses.

It is also returned by openMode. Returns true on success; otherwise returns false for example, if the device is not open. This function is called by readLine , and provides its base implementation, using getChar. Sets the OpenMode of the device to openMode. It is also returned by PySide. Returns the number of bytes that were actually written, or -1 if an error occurred. QIODevice::write data , qstrlen data ;. See also startTransaction and commitTransaction. It is emitted as soon as the closing is detected, which means that there might still be data available for reading with read. If called from within a slot connected to the readyRead signal, readyRead will not be reemitted. It is emitted as soon as the closing is detected, which means that there might still be data available for reading with read. Reads a line from the device, but no more than maxSize characters, and returns the result as a QByteArray. This function can operate without an event loop. This allows QIODevice subclasses to be used without an event loop, or in a separate thread: waitForReadyRead - This function suspends operation in the calling thread until new data is available for reading. The bytes argument is set to the number of bytes that were written in this payload.