It is always best to cast integers to a Qt integer type when writing, and to read back into the same Qt integer type when reading.
Q_INT8 |
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Q_INT16 |
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Q_INT32 |
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Q_INT64 |
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Q_UINT8 |
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Q_UINT16 |
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Q_UINT32 |
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Q_UINT64 |
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float |
- 32-bit floating point number using the standard IEEE 754 format
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double |
- 64-bit floating point number using the standard IEEE 754 format
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const char * |
- The size of the string including the terminating 0 (Q_UINT32)
- The string bytes including the terminating 0
The null string is represented as (Q_UINT32)0. |
QBitArray |
- The array size (Q_UINT32)
- The array bits, i.e. (size + 7)/8 bytes
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QBrush |
- The brush style (Q_UINT8)
- The brush color (QColor)
- If style is CustomPattern, the brush pixmap (QPixmap)
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QByteArray |
- If the byte array is null: 0xFFFFFFFF (Q_UINT32)
- Otherwise: the array size (Q_UINT32) followed by the array bytes, i.e. size bytes
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QColor |
- RGB value serialized as a Q_UINT32
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QCoreVariant |
- The type of the data (Q_UINT32)
- The data of the specified type
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QCursor |
- Shape ID (Q_INT16)
- If shape is BitmapCursor: The bitmap (QPixmap), mask (QPixmap), and hot spot (QPoint)
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QDate |
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QDateTime |
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QFont |
- The family (QString)
- The point size (Q_INT16)
- The style hint (Q_UINT8)
- The char set (Q_UINT8)
- The weight (Q_UINT8)
- The font bits (Q_UINT8)
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QHash<Key, T> |
- The number of items (Q_UINT32)
- For all items, the key (Key) and value (T)
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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 QImageIO) and stream that.
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QKeySequence | A QList<int>, where each integer is a key in the key sequence |
QLinkedList<T> |
- The number of items (Q_UINT32)
- The items (T)
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QList<T> |
- The number of items (Q_UINT32)
- The items (T)
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QMap<Key, T> |
- The number of items (Q_UINT32)
- For all items, the key (Key) and value (T)
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QPair<T1, T2> |
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QPalette | The disabled, active, and inactive color groups, each of which consists of the following:
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QPen |
- The pen styles (Q_UINT8)
- The pen width (Q_UINT16)
- The pen color (QColor)
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QPicture |
- The size of the picture data (Q_UINT32)
- The raw bytes of picture data (char)
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QPixmap |
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QPoint |
- The x coordinate (Q_INT32)
- The y coordinate (Q_INT32)
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QPointArray |
- The array size (Q_UINT32)
- The array points (QPoint)
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QRect |
- left (Q_INT32)
- top (Q_INT32)
- right (Q_INT32)
- bottom (Q_INT32)
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QRegion |
- The size of the data, i.e. 8 + 16 * (number of rectangles) (Q_UINT32)
- QRGN_RECTS (Q_INT32)
- The number of rectangles (Q_UINT32)
- The rectangles in sequential order (QRect)
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QSize |
- width (Q_INT32)
- height (Q_INT32)
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QString |
- If the string is null: 0xFFFFFFFF (Q_UINT32)
- Otherwise: The string length (Q_UINT32) followed by the data in UTF-16
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QTime |
- Milliseconds since midnight (Q_UINT32)
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QVector<T> |
- The number of items (Q_UINT32)
- The items (T)
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QWMatrix |
- m11 (double)
- m12 (double)
- m21 (double)
- m22 (double)
- dx (double)
- dy (double)
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