QSvgRenderer¶
The
QSvgRenderer
class is used to draw the contents of SVG files onto paint devices. More…
Synopsis¶
Functions¶
def
animated
()def
animationDuration
()def
boundsOnElement
(id)def
currentFrame
()def
defaultSize
()def
elementExists
(id)def
framesPerSecond
()def
isValid
()def
matrixForElement
(id)def
setCurrentFrame
(arg__1)def
setFramesPerSecond
(num)def
setViewBox
(viewbox)def
setViewBox
(viewbox)def
viewBox
()def
viewBoxF
()
Slots¶
Signals¶
def
repaintNeeded
()
Detailed Description¶
Using
QSvgRenderer
, Scalable Vector Graphics (SVG) can be rendered onto anyQPaintDevice
subclass, includingQWidget
,QImage
, andQGLWidget
.
QSvgRenderer
provides an API that supports basic features of SVG rendering, such as loading and rendering of static drawings, and more interactive features like animation. Since the rendering is performed usingQPainter
, SVG drawings can be rendered on any subclass ofQPaintDevice
.SVG drawings are either loaded when an
QSvgRenderer
is constructed, or loaded later using theload()
functions. Data is either supplied directly as serialized XML, or indirectly using a file name. If a valid file has been loaded, either when the renderer is constructed or at some later time,isValid()
returns true; otherwise it returns false.QSvgRenderer
provides therender()
slot to render the current document, or the current frame of an animated document, using a given painter.The
defaultSize()
function provides information about the amount of space that is required to render the currently loaded SVG file. This is useful for paint devices, such asQWidget
, that often need to supply a size hint to their parent layout. The default size of a drawing may differ from its visible area, found using theviewBox
property.Animated SVG drawings are supported, and can be controlled with a simple collection of functions and properties:
The
animated()
function indicates whether a drawing contains animation information.The
framesPerSecond
property contains the rate at which the animation plays.Finally, the
QSvgRenderer
class provides therepaintNeeded()
signal which is emitted whenever the rendering of the document needs to be updated.See also
QSvgWidget
Qt SVG C++ Classes SVG Viewer ExampleQPicture
-
class
QSvgRenderer
([parent=None])¶ QSvgRenderer(contents[, parent=None])
QSvgRenderer(contents[, parent=None])
QSvgRenderer(filename[, parent=None])
- param parent
QObject
- param contents
QXmlStreamReader
- param filename
unicode
Constructs a new renderer with the given
parent
.Constructs a new renderer with the given
parent
and loads the SVG data using the stream reader specified bycontents
.
-
PySide2.QtSvg.QSvgRenderer.
animated
()¶ - Return type
bool
Returns true if the current document contains animated elements; otherwise returns false.
See also
-
PySide2.QtSvg.QSvgRenderer.
animationDuration
()¶ - Return type
int
Returns the number of frames in the animation, or 0 if the current document is not animated.
See also
-
PySide2.QtSvg.QSvgRenderer.
boundsOnElement
(id)¶ - Parameters
id – unicode
- Return type
QRectF
Returns bounding rectangle of the item with the given
id
. The transformation matrix of parent elements is not affecting the bounds of the element.See also
-
PySide2.QtSvg.QSvgRenderer.
currentFrame
()¶ - Return type
int
-
PySide2.QtSvg.QSvgRenderer.
defaultSize
()¶ - Return type
QSize
Returns the default size of the document contents.
-
PySide2.QtSvg.QSvgRenderer.
elementExists
(id)¶ - Parameters
id – unicode
- Return type
bool
Returns true if the element with the given
id
exists in the currently parsed SVG file and is a renderable element.Note: this method returns true only for elements that can be rendered. Which implies that elements that are considered part of the fill/stroke style properties, e.g. radialGradients even tough marked with “id” attributes will not be found by this method.
-
PySide2.QtSvg.QSvgRenderer.
framesPerSecond
()¶ - Return type
int
See also
-
PySide2.QtSvg.QSvgRenderer.
isValid
()¶ - Return type
bool
Returns true if there is a valid current document; otherwise returns false.
-
PySide2.QtSvg.QSvgRenderer.
load
(contents)¶ - Parameters
contents –
QXmlStreamReader
- Return type
bool
Loads the specified SVG in
contents
, returning true if the content was successfully parsed; otherwise returns false.The reader will be used from where it currently is positioned. If
contents
isnull
, behavior is undefined.
-
PySide2.QtSvg.QSvgRenderer.
load
(contents) - Parameters
contents –
QByteArray
- Return type
bool
-
PySide2.QtSvg.QSvgRenderer.
load
(filename) - Parameters
filename – unicode
- Return type
bool
-
PySide2.QtSvg.QSvgRenderer.
matrixForElement
(id)¶ - Parameters
id – unicode
- Return type
QMatrix
Returns the transformation matrix for the element with the given
id
. The matrix is a product of the transformation of the element’s parents. The transformation of the element itself is not included.To find the bounding rectangle of the element in logical coordinates, you can apply the matrix on the rectangle returned from
boundsOnElement()
.See also
-
PySide2.QtSvg.QSvgRenderer.
render
(p, elementId[, bounds=QRectF()])¶ - Parameters
p –
QPainter
elementId – unicode
bounds –
QRectF
Renders the given element with
elementId
using the givenpainter
on the specifiedbounds
. If the bounding rectangle is not specified the SVG element is mapped to the whole paint device.
-
PySide2.QtSvg.QSvgRenderer.
render
(p, bounds) - Parameters
p –
QPainter
bounds –
QRectF
Renders the current document, or the current frame of an animated document, using the given
painter
on the specifiedbounds
within the painter. If the bounding rectangle is not specified the SVG file is mapped to the whole paint device.
-
PySide2.QtSvg.QSvgRenderer.
render
(p) - Parameters
p –
QPainter
Renders the current document, or the current frame of an animated document, using the given
painter
.
-
PySide2.QtSvg.QSvgRenderer.
repaintNeeded
()¶
-
PySide2.QtSvg.QSvgRenderer.
setCurrentFrame
(arg__1)¶ - Parameters
arg__1 –
int
-
PySide2.QtSvg.QSvgRenderer.
setFramesPerSecond
(num)¶ - Parameters
num –
int
See also
-
PySide2.QtSvg.QSvgRenderer.
setViewBox
(viewbox)¶ - Parameters
viewbox –
QRect
-
PySide2.QtSvg.QSvgRenderer.
setViewBox
(viewbox) - Parameters
viewbox –
QRectF
-
PySide2.QtSvg.QSvgRenderer.
viewBox
()¶ - Return type
QRect
Returns
viewBoxF()
.toRect().See also
-
PySide2.QtSvg.QSvgRenderer.
viewBoxF
()¶ - Return type
QRectF
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