The QPicture class is a paint device that records and replays QPainter commands.
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A picture serializes painter commands to an IO device in a platform-independent format. For example, a picture created under Windows can be read on a Sun SPARC.
Qt pictures use a proprietary binary format. Unlike native picture (meta-file) formats on many window systems, TQt pictures have no limitations regarding their contents. Everything that can be painted can also be stored in a picture, e.g. fonts, pixmaps, regions, transformed graphics, etc.
Pictures can also be drawn using play(). Some basic data about a picture is available, for example, size(), isNull() and boundingRect().
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See also Graphics Classes, Image Processing Classes, and Implicitly and Explicitly Shared Classes.
.SH MEMBER FUNCTION DOCUMENTATION
.SH "QPicture::QPicture ( int formatVersion = -1 )"
Constructs an empty picture.
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The \fIformatVersion\fR parameter may be used to \fIcreate\fR a QPicture that can be read by applications that are compiled with earlier versions of Qt.
Note that the default formatVersion is -1 which signifies the current release, i.e. for TQt 3.1 a formatVersion of 5 is the same as the default formatVersion of -1.
Returns a pointer to the picture data. The pointer is only valid until the next non-const function is called on this picture. The returned pointer is 0 if the picture contains no data.
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See also size() and isNull().
.SH "void QPicture::detach ()\fC [protected]\fR"
Detaches from shared picture data and makes sure that this picture is the only one referring to the data.
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If multiple pictures share common data, this picture makes a copy of the data and detaches itself from the sharing mechanism. Nothing is done if there is just a single reference.
.SH "bool QPicture::isNull () const"
Returns TRUE if the picture contains no data; otherwise returns FALSE.
Loads a picture from the file specified by \fIfileName\fR and returns TRUE if successful; otherwise returns FALSE.
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By default, the file will be interpreted as being in the native QPicture format. Specifying the \fIformat\fR string is optional and is only needed for importing picture data stored in a different format.
Saves a picture to the file specified by \fIfileName\fR and returns TRUE if successful; otherwise returns FALSE.
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Specifying the file \fIformat\fR string is optional. It's not recommended unless you intend to export the picture data for use by a third party reader. By default the data will be saved in the native QPicture file format.
