Subgroup: Annotation
Class: QgsAnnotation¶
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class
qgis.core.
QgsAnnotation
(parent: QObject = None)¶ Bases:
PyQt5.QtCore.QObject
Constructor for QgsAnnotation.
New in version 3.0: Abstract base class for annotation items which are drawn over a map.
QgsAnnotation is an abstract base class for map annotation items. These annotations can be drawn within a map, and have either a fixed map position (retrieved using mapPosition()) or are placed relative to the map’s frame (retrieved using relativePosition()). Annotations with a fixed map position also have a corresponding QgsCoordinateReferenceSystem, which can be determined by calling mapPositionCrs().
Derived classes should implement their custom painting routines within a renderAnnotation() override.
Methods
associatedFeature
Returns the feature associated with the annotation, or an invalid feature if none has been set. childEvent
clone
Clones the annotation, returning a new copy of the annotation reflecting the annotation’s current state. connectNotify
contentsMargin
Returns the margins (in millimeters) between the outside of the frame and the annotation content. copyCommonProperties
Copies common annotation properties to the targe
annotation.customEvent
disconnectNotify
fillSymbol
Returns the symbol that is used for rendering the annotation frame. frameOffsetFromReferencePoint
Returns the annotation’s frame’s offset from the mapPosition() reference point. frameSize
Returns the size of the annotation’s frame (the main area in which the annotation’s content is drawn). hasFixedMapPosition
Returns true if the annotation is attached to a fixed map position, or false if the annotation uses a position relative to the current map extent. isSignalConnected
isVisible
Returns true if the annotation is visible and should be rendered. mapLayer
Returns the map layer associated with the annotation. mapPosition
Returns the map position of the annotation, if it is attached to a fixed map position. mapPositionCrs
Returns the CRS of the map position, or an invalid CRS if the annotation does not have a fixed map position. markerSymbol
Returns the symbol that is drawn at the annotation’s map position. minimumFrameSize
Returns the minimum frame size for the annotation. readXml
Restores the annotation’s state from a DOM element. receivers
relativePosition
Returns the relative position of the annotation, if it is not attached to a fixed map position. render
Renders the annotation to a target render context. renderAnnotation
Renders the annotation’s contents to a target /a context at the specified /a size. sender
senderSignalIndex
setAssociatedFeature
Sets the feature associated with the annotation. setContentsMargin
Sets the margins (in millimeters) between the outside of the frame and the annotation content. setFillSymbol
Sets the fill symbol used for rendering the annotation frame. setFrameOffsetFromReferencePoint
Sets the annotation’s frame’s offset from the mapPosition() reference point. setFrameSize
Sets the size of the annotation’s frame (the main area in which the annotation’s content is drawn). setHasFixedMapPosition
Sets whether the annotation is attached to a fixed map position, or uses a position relative to the current map extent. setMapLayer
Sets the map layer associated with the annotation. setMapPosition
Sets the map position of the annotation, if it is attached to a fixed map position. setMapPositionCrs
Sets the CRS of the map position. setMarkerSymbol
Sets the symbol that is drawn at the annotation’s map position. setRelativePosition
Sets the relative position of the annotation, if it is not attached to a fixed map position. setVisible
Sets whether the annotation is visible and should be rendered. timerEvent
writeXml
Writes the annotation state to a DOM element. Signals
appearanceChanged
Emitted whenever the annotation’s appearance changes [signal] mapLayerChanged
Emitted when the map layer associated with the annotation changes. moved
Emitted when the annotation’s position has changed and items need to be moved to reflect this. Attributes
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appearanceChanged
¶ Emitted whenever the annotation’s appearance changes [signal]
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associatedFeature
(self) → QgsFeature¶ Returns the feature associated with the annotation, or an invalid feature if none has been set.
See also
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childEvent
()¶
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clone
(self) → QgsAnnotation¶ Clones the annotation, returning a new copy of the annotation reflecting the annotation’s current state.
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connectNotify
()¶
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contentsMargin
(self) → QgsMargins¶ Returns the margins (in millimeters) between the outside of the frame and the annotation content.
See also
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copyCommonProperties
(self, target: QgsAnnotation)¶ Copies common annotation properties to the
targe
annotation. Can be used within QgsAnnotation.clone() implementations to assist with creating copies.
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customEvent
()¶
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disconnectNotify
()¶
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fillSymbol
(self) → QgsFillSymbol¶ Returns the symbol that is used for rendering the annotation frame.
See also
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frameOffsetFromReferencePoint
(self) → QPointF¶ Returns the annotation’s frame’s offset from the mapPosition() reference point.
See also
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frameSize
(self) → QSizeF¶ Returns the size of the annotation’s frame (the main area in which the annotation’s content is drawn).
See also
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hasFixedMapPosition
(self) → bool¶ Returns true if the annotation is attached to a fixed map position, or false if the annotation uses a position relative to the current map extent.
See also
See also
See also
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isSignalConnected
()¶
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isVisible
(self) → bool¶ Returns true if the annotation is visible and should be rendered.
See also
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mapLayer
(self) → QgsMapLayer¶ Returns the map layer associated with the annotation. Annotations can be associated with a map layer if their visibility should be synchronized with the layer’s visibility.
See also
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mapLayerChanged
¶ Emitted when the map layer associated with the annotation changes. [signal]
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mapPosition
(self) → QgsPointXY¶ Returns the map position of the annotation, if it is attached to a fixed map position.
See also
See also
See also
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mapPositionCrs
(self) → QgsCoordinateReferenceSystem¶ Returns the CRS of the map position, or an invalid CRS if the annotation does not have a fixed map position.
See also
-
markerSymbol
(self) → QgsMarkerSymbol¶ Returns the symbol that is drawn at the annotation’s map position.
See also
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minimumFrameSize
(self) → QSizeF¶ Returns the minimum frame size for the annotation. Subclasses should implement this if they cannot be resized smaller than a certain minimum size.
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moved
¶ Emitted when the annotation’s position has changed and items need to be moved to reflect this. [signal]
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readXml
(self, itemElem: QDomElement, context: QgsReadWriteContext)¶ Restores the annotation’s state from a DOM element. Derived classes should call _readXml() within their implementation of this method.
See also
See also
_readXml
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receivers
()¶
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relativePosition
(self) → QPointF¶ Returns the relative position of the annotation, if it is not attached to a fixed map position. The coordinates in the return point should be between 0 and 1, and represent the relative percentage for the position compared to the map width and height.
See also
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render
(self, context: QgsRenderContext)¶ Renders the annotation to a target render context.
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renderAnnotation
(self, context: QgsRenderContext, size: QSizeF)¶ Renders the annotation’s contents to a target /a context at the specified /a size. Derived classes should implement their custom annotation drawing logic here.
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sender
()¶
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senderSignalIndex
()¶
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setAssociatedFeature
(self, feature: QgsFeature)¶ Sets the feature associated with the annotation.
See also
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setContentsMargin
(self, margins: QgsMargins)¶ Sets the margins (in millimeters) between the outside of the frame and the annotation content.
See also
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setFillSymbol
(self, symbol: QgsFillSymbol)¶ Sets the fill symbol used for rendering the annotation frame. Ownership of the symbol is transferred to the annotation.
See also
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setFrameOffsetFromReferencePoint
(self, offset: Union[QPointF, QPoint])¶ Sets the annotation’s frame’s offset from the mapPosition() reference point.
See also
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setFrameSize
(self, size: QSizeF)¶ Sets the size of the annotation’s frame (the main area in which the annotation’s content is drawn).
See also
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setHasFixedMapPosition
(self, fixed: bool)¶ Sets whether the annotation is attached to a fixed map position, or uses a position relative to the current map extent.
See also
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setMapLayer
(self, layer: QgsMapLayer)¶ Sets the map layer associated with the annotation. Annotations can be associated with a map layer if their visibility should be synchronized with the layer’s visibility.
See also
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setMapPosition
(self, position: QgsPointXY)¶ Sets the map position of the annotation, if it is attached to a fixed map position.
See also
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setMapPositionCrs
(self, crs: QgsCoordinateReferenceSystem)¶ Sets the CRS of the map position.
See also
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setMarkerSymbol
(self, symbol: QgsMarkerSymbol)¶ Sets the symbol that is drawn at the annotation’s map position. Ownership of the symbol is transferred to the annotation.
See also
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setRelativePosition
(self, position: Union[QPointF, QPoint])¶ Sets the relative position of the annotation, if it is not attached to a fixed map position. The coordinates in the return point should be between 0 and 1, and represent the relative percentage for the position compared to the map width and height.
See also
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setVisible
(self, visible: bool)¶ Sets whether the annotation is visible and should be rendered.
See also
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timerEvent
()¶
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