QGraphicsSvgItem provides a way of rendering SVG files onto
QGraphicsSvgItem can be created by passing the SVG file to be rendered to its constructor or by explicit setting a shared
QSvgRenderer on it.
Note that setting
QSvgRenderer on a
QGraphicsSvgItem doesn’t make the item take ownership of the renderer, therefore if using
setSharedRenderer() method one has to make sure that the lifetime of the
QSvgRenderer object will be at least as long as that of the
QGraphicsSvgItem provides a way of rendering only parts of the SVG files via the
setElementId . If
setElementId() method is called, only the SVG element (and its children) with the passed id will be renderer. This provides a convenient way of selectively rendering large SVG files that contain a number of discrete elements. For example the following code renders only jokers from a SVG file containing a whole card deck:
QSvgRenderer *renderer = new QSvgRenderer(QLatin1String("SvgCardDeck.svg")); QGraphicsSvgItem *black = new QGraphicsSvgItem(); QGraphicsSvgItem *red = new QGraphicsSvgItem(); black->setSharedRenderer(renderer); black->setElementId(QLatin1String("black_joker")); red->setSharedRenderer(renderer); red->setElementId(QLatin1String("red_joker"));
Size of the item can be set via direct manipulation of the items transformation matrix.
By default the SVG rendering is cached using
DeviceCoordinateCache mode to speedup the display of items. Caching can be disabled by passing
NoCache to the
QSvgWidgetQt SVG C++ Classes
fileName – str
Constructs a new SVG item with the given
Constructs a new item with the given
parent and loads the contents of the SVG file with the specified
- Return type
Returns the XML ID the element that is currently being rendered. Returns an empty string if the whole file is being rendered.
- Return type
Returns the current maximum size of the device coordinate cache for this item. If the item is cached using
DeviceCoordinateCache mode, caching is bypassed if the extension of the item in device coordinates is larger than the maximum size.
The default maximum cache size is 1024x768.
cacheLimit() gives the cumulative bounds of the whole cache, whereas refers to a maximum cache size for this particular item.
Returns the currently use
arg__1 – bool
setCacheMode() instead. Passing true to this function is equivalent to
id – str
Sets the XML ID of the element to
Sets the maximum device coordinate cache size of the item to
size. If the item is cached using
DeviceCoordinateCache mode, caching is bypassed if the extension of the item in device coordinates is larger than
The cache corresponds to the
QPixmap which is used to cache the results of the rendering. Use
setCacheLimit() to set limitations on the whole cache and use when setting cache size for individual items.
renderer to be a shared
QSvgRenderer on the item. By using this method one can share the same
QSvgRenderer on a number of items. This means that the SVG file will be parsed only once.
QSvgRenderer passed to this method has to exist for as long as this item is used.
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