Qiodevice

Qiodevice 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, qiodevice. Certain flags, such as Unbuffered and Truncateqiodevice, are meaningless when used with some subclasses. Some of these restrictions are implied by the type of device that is represented by a subclass.

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

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 buffered devices, this function waits until a payload of buffered written data has been written qiodevice the device and the bytesWritten signal has been emitted, or until msecs milliseconds have passed. Note that this mode implies WriteOnly, and combining it qiodevice ReadWrite is allowed, 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.

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

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.

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Returns true if the Text flag is enabled; otherwise returns false. This is a convenience function which checks if the OpenMode of the device contains the ReadOnly flag. Returns the number of bytes read. Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. Seeks to the start of input for random-access devices. For buffered devices, this function waits until a payload of buffered written data has been written to the device and the bytesWritten signal has been emitted, or until msecs milliseconds have passed. For random-access devices, this function sets the current position to pos , returning true on success, or false if an error occurred. This special case only applies to devices that generate data in direct response to you calling read e. Reads up to maxSize characters into data and returns the number of characters read. This function has no way of reporting errors; returning an empty QByteArray can mean either that no data was currently available for reading, or that an error occurred. QIODevice also handles access control for you, so you can safely assume that the device is opened in write mode if writeData is called. If a newline is not encountered before maxSize - 1 bytes are read, a newline will not be inserted into the buffer. Some subclasses, such as QFile and QTcpSocket , are implemented using a memory buffer for intermediate storing of data. Returns true if data is available for reading; otherwise returns false if the operation timed out or if an error occurred. QTextStream on a PySide.

Base class for QIODevice that provides flags describing the mode in which a device is opened.

For example, PySide. Use bytesToWrite to determine the current amount of data waiting to be written. QIODevice also handles access control for you, so you can safely assume that the device is opened in write mode if PySide. Seeks to the start of input for random-access devices. This signal is emitted when the device is about to close. All other trademarks are property of their respective owners. QIODevice implement blocking functions for device-specific operations. If an error occurs, it should return -1 if and only if no bytes were read. This function is called by readLine , and provides its base implementation, using getChar. Peeks at most maxSize bytes from the device, returning the data peeked as a PySide. Kills the timer with timer identifier, id. See also bytesWritten. Returns true if data can be read from the device; otherwise returns false. The current input channel is used by the functions read , readAll , readLine , and getChar. Referenced by read , and QUnixSocket::read.