Serializing Qt Data Types

bool

• boolean

qint8

• signed byte

qint16

• signed 16-bit integer

qint32

• signed 32-bit integer

qint64

• signed 64-bit integer

quint8

• unsigned byte

quint16

• unsigned 16-bit integer

quint32

• unsigned 32-bit integer

quint64

• unsigned 64-bit integer

float

• 32-bit floating point number using the standard IEEE 754 format

double

• 64-bit floating point number using the standard IEEE 754 format

const char *

• The string length (quint32)

• The string bytes, excluding the terminating 0

QBitArray

• The array size (quint32)

• The array bits, i.e. (size + 7)/8 bytes

QBrush

• The brush style (quint8)

• The brush color (QColor)

• If style is CustomPattern, the brush pixmap (QPixmap)

QByteArray

• If the byte array is null: 0xFFFFFFFF (quint32)

• Otherwise: the array size (quint32) followed by the array bytes, i.e. size bytes

QColor

• Color spec (qint8)

• Alpha value (quint16)

• Red value (quint16)

• Green value (quint16)

• Blue value (quint16)

• Pad value (quint16)

QCursor

• Shape ID (qint16)

• If shape is BitmapCursor: The bitmap (QPixmap), mask (QPixmap), and hot spot (QPoint)

QDate

• Julian day (quint32)

QDateTime

• Date (QDate)

• Time (QTime)

• The time spec offsetFromUtc (qint32) if Qt::TimeSpec is offsetFromUtc TimeZone(QTimeZone) if Qt::TimeSpec is TimeZone

QEasingCurve

• type (quint8)

• func (quint64)

• hasConfig (bool)

• If hasConfig is true then these fields follow:

• list

• period (double)

• amplitude (double)

• overshoot (double)

QFont

• The family (QString)

• The style name (QString)

• The point size (double)

• The pixel size (qint32)

• The style hint (quint8)

• The style strategy (quint16)

• The char set (quint8)

• The weight (quint8)

• The font bits (quint8)

• The font stretch (quint16)

• The extended font bits (quint8)

• The letter spacing (double)

• The word spacing (double)

• The hinting preference (quint8)

QHash<Key, T>

• The number of items (quint32)

• For all items, the key (Key) and value (T)

QIcon

• The number of pixmap entries (quint32)

• For all pixmap entries:

  • The pixmap (QPixmap)

  • The file name (QString)

  • The pixmap size (QSize)

  • The mode (quint32)

  • The state (quint32)

QImage

• If the image is null a "null image" marker is saved; otherwise the image is saved in PNG or BMP format (depending on the stream version). If you want control of the format, stream the image into a QBuffer (using QImageIOHandler/QImageIOPlugin) and stream that.

QKeySequence

• A QList<int>, where each integer is a key in the key sequence

QLinkedList<T>

• The number of items (quint32)

• The items (T)

QList<T>

• The number of items (quint32)

• The items (T)

QMap<Key, T>

• The number of items (quint32)

• For all items, the key (Key) and value (T)

QMargins

• left (int)

• top (int)

• right (int)

• bottom (int)

QMatrix

• m11 (double)

• m12 (double)

• m21 (double)

• m22 (double)

• dx (double)

• dy (double)

QMatrix4x4

• m11 (float)

• m12 (float)

• m13 (float)

• m14 (float)

• m21 (float)

• m22 (float)

• m23 (float)

• m24 (float)

• m31 (float)

• m32 (float)

• m33 (float)

• m34 (float)

• m41 (float)

• m42 (float)

• m43 (float)

• m44 (float)

QPair<T1, T2>

• first (T1)

• second (T2)

QPalette

The disabled, active, and inactive color groups, each of which consists of the following:

• foreground (QBrush)

• button (QBrush)

• light (QBrush)

• midlight (QBrush)

• dark (QBrush)

• mid (QBrush)

• text (QBrush)

• brightText (QBrush)

• buttonText (QBrush)

• base (QBrush)

• background (QBrush)

• shadow (QBrush)

• highlight (QBrush)

• highlightedText (QBrush)

• link (QBrush)

• linkVisited (QBrush)

QPen

• The pen styles (quint8)

• The pen width (quint16)

• The pen color (QColor)

QPicture

• The size of the picture data (quint32)

• The raw bytes of picture data (char)

QPixmap

• Save it as a PNG image.

QPoint

• The x coordinate (qint32)

• The y coordinate (qint32)

QQuaternion

• The scalar component (float)

• The x coordinate (float)

• The y coordinate (float)

• The z coordinate (float)

QRect

• left (qint32)

• top (qint32)

• right (qint32)

• bottom (qint32)

QRegExp

• The regexp pattern (QString)

• Case sensitivity (quint8)

• Regular expression syntax (quint8)

• Minimal matching (quint8)

QRegularExpression

• The regular expression pattern (QString)

• The pattern options (quint32)

QRegion

• The size of the data, i.e. 8 + 16 * (number of rectangles) (quint32)

• 10 (qint32)

• The number of rectangles (quint32)

• The rectangles in sequential order (QRect)

QSize

• width (qint32)

• height (qint32)

QString

• If the string is null: 0xFFFFFFFF (quint32)

• Otherwise: The string length in bytes (quint32) followed by the data in UTF-16

QTime

• Milliseconds since midnight (quint32)

QTransform

• m11 (double)

• m12 (double)

• m13 (double)

• m21 (double)

• m22 (double)

• m23 (double)

• m31 (double)

• m32 (double)

• m33 (double)

QUrl

• Holds an URL (QString)

QVariant

• The type of the data (quint32)

• The null flag (qint8)

• The data of the specified type

QVector2D

• the x coordinate (float)

• the y coordinate (float)

QVector3D

• the x coordinate (float)

• the y coordinate (float)

• the z coordinate (float)

QVector4D

• the x coordinate (float)

• the y coordinate (float)

• the z coordinate (float)

• the w coordinate (float)

QVector<T>

• The number of items (quint32)

• The items (T)