Qiodevice

Note: All functions in this class are reentrant, qiodevice, qiodevice. You can then write to the device with write or putCharand read by calling qiodevice readreadLineor readAll. Call close when you are done with the device.

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. QFile and QBuffer are examples of random-access devices.

Qiodevice

Note: All functions in this class are reentrant. 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. You can use isSequential to determine the type of device. QIODevice emits readyRead when new data is available for reading; for example, if new data has arrived on the network or if additional data is appended to a file that you are reading from. You can call bytesAvailable to determine the number of bytes that are currently available for reading. It's common to use bytesAvailable together with the readyRead signal when programming with asynchronous devices such as QTcpSocket , where fragments of data can arrive at arbitrary points in time. QIODevice emits the bytesWritten signal every time a payload of data has been written to the device. Use bytesToWrite to determine the current amount of data waiting to be written. QIODevice provides functions that allow you to force these operations to be performed immediately, while blocking the calling thread and without entering the event loop.

For random-access devices, this function sets the current position to pos, qiodevice, returning qiodevice on success Returns a pointer to the object named name that inherits type and qiodevice a given parent. Subclasses that reimplement this function must call the base implementation in order to include the contents of the QIODevice 's buffer, qiodevice.

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. The data must be read in one pass.

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. Documentation contributions included herein are the copyrights of their respective owners. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners.

Qiodevice

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.

Streameast.io

Returns the number of bytes read. For example, PySide. QProcess has a function called waitForStarted which suspends operation in the calling thread until the process has started. Reimplement this function to provide a blocking API for a custom device. QIODevice object. QIODevice emits the bytesWritten signal every time a payload of data has been written to the device. For example, QProcess has a function called waitForStarted which suspends operation in the calling thread until the process has started. If there are no bytes to be read and there can never be more bytes available examples include socket closed, pipe closed, sub-process finished , this function returns If an error occurs, such as when attempting to read from a device opened in WriteOnly mode, this function returns Blocks until new data is available for reading and the PySide. It is optimized to skip unwanted data after a peek call. Create and open the file only if it does not exist. This is a convenience function which checks if the OpenMode of the device contains the WriteOnly flag. This special case only applies to devices that generate data in direct response to you calling read e.

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QDataStream assumes all the information was written and therefore does not retry writing if there was a problem. QIODevice also handles access control for you, so you can safely assume that the device is opened in write mode if PySide. Use bytesToWrite to determine the current amount of data waiting to be written. If an error occurs, such as when attempting to read from a device opened in WriteOnly mode, this function returns This allows QIODevice subclasses to be used without an event loop, or in a separate thread:. ReadOnly or WriteOnly. Regular files are non-sequential. Returns the mode in which the device has been opened; i. Returns true if data can be read from the device; otherwise returns false. Sets the current read channel of the QIODevice to the given channel. Use bytesToWrite to determine the current amount of data waiting to be written. For this reason, QIODevice allows you to bypass any buffering by passing the Unbuffered flag to open. Regular files, on the other hand, do support random access.