Draws straight (right angled) lines as callouts. More...
#include <qgscallout.h>
Inheritance diagram for QgsManhattanLineCallout:
Public Member Functions | |
| QgsManhattanLineCallout () | |
| QgsManhattanLineCallout (const QgsManhattanLineCallout &other) | |
| Copy constructor. More... | |
| QgsManhattanLineCallout * | clone () const override |
| Duplicates a callout by creating a deep copy of the callout. More... | |
| QgsManhattanLineCallout & | operator= (const QgsManhattanLineCallout &)=delete |
| QString | type () const override |
| Returns a unique string representing the callout type. More... | |
 Public Member Functions inherited from QgsSimpleLineCallout | |
| QgsSimpleLineCallout () | |
| QgsSimpleLineCallout (const QgsSimpleLineCallout &other) | |
| Copy constructor. More... | |
| ~QgsSimpleLineCallout () override | |
| bool | drawCalloutToAllParts () const |
Returns true if callout lines should be drawn to all feature parts. More... | |
| QgsLineSymbol * | lineSymbol () |
| Returns the line symbol used to render the callout line. More... | |
| double | minimumLength () const |
| Returns the minimum length of callout lines. More... | |
| const QgsMapUnitScale & | minimumLengthMapUnitScale () const |
| Returns the map unit scale for the minimum callout length. More... | |
| QgsUnitTypes::RenderUnit | minimumLengthUnit () const |
| Returns the units for the minimum length of callout lines. More... | |
| double | offsetFromAnchor () const |
| Returns the offset distance from the anchor point at which to start the line. More... | |
| const QgsMapUnitScale & | offsetFromAnchorMapUnitScale () const |
| Returns the map unit scale for the offset from anchor. More... | |
| QgsUnitTypes::RenderUnit | offsetFromAnchorUnit () const |
| Returns the units for the offset from anchor point. More... | |
| double | offsetFromLabel () const |
| Returns the offset distance from label area at which to end the line. More... | |
| const QgsMapUnitScale & | offsetFromLabelMapUnitScale () const |
| Returns the map unit scale for the minimum callout length. More... | |
| QgsUnitTypes::RenderUnit | offsetFromLabelUnit () const |
| Returns the units for the offset from label area. More... | |
| QgsSimpleLineCallout & | operator= (const QgsSimpleLineCallout &)=delete |
| QVariantMap | properties (const QgsReadWriteContext &context) const override |
| Returns the properties describing the callout encoded in a string format. More... | |
| void | readProperties (const QVariantMap &props, const QgsReadWriteContext &context) override |
| Reads a string map of an callout's properties and restores the callout to the state described by the properties map. More... | |
| QSet< QString > | referencedFields (const QgsRenderContext &context) const override |
| Returns the set of attributes referenced by the callout. More... | |
| void | setDrawCalloutToAllParts (bool drawToAllParts) |
| Sets whether callout lines should be drawn to all feature parts. More... | |
| void | setLineSymbol (QgsLineSymbol *symbol) |
| Sets the line symbol used to render the callout line. More... | |
| void | setMinimumLength (double length) |
| Sets the minimum length of callout lines. More... | |
| void | setMinimumLengthMapUnitScale (const QgsMapUnitScale &scale) |
| Sets the map unit scale for the minimum callout length. More... | |
| void | setMinimumLengthUnit (QgsUnitTypes::RenderUnit unit) |
| Sets the unit for the minimum length of callout lines. More... | |
| void | setOffsetFromAnchor (double distance) |
| Sets the offset distance from the anchor point at which to start the line. More... | |
| void | setOffsetFromAnchorMapUnitScale (const QgsMapUnitScale &scale) |
| Sets the map unit scale for the offset from anchor. More... | |
| void | setOffsetFromAnchorUnit (QgsUnitTypes::RenderUnit unit) |
| Sets the unit for the offset from anchor distance. More... | |
| void | setOffsetFromLabel (double distance) |
| Sets the offset distance from label area at which to end the line. More... | |
| void | setOffsetFromLabelMapUnitScale (const QgsMapUnitScale &scale) |
| Sets the map unit scale for the offset from label area. More... | |
| void | setOffsetFromLabelUnit (QgsUnitTypes::RenderUnit unit) |
| Sets the unit for the offset from label area distance. More... | |
| void | startRender (QgsRenderContext &context) override |
| Prepares the callout for rendering on the specified render context. More... | |
| void | stopRender (QgsRenderContext &context) override |
| Finalises the callout after a set of rendering operations on the specified render context. More... | |
| Public Member Functions inherited from QgsCallout | |
| QgsCallout () | |
| Constructor for QgsCallout. More... | |
| virtual | ~QgsCallout ()=default |
| AnchorPoint | anchorPoint () const |
| Returns the feature's anchor point position. More... | |
| QgsPropertyCollection & | dataDefinedProperties () |
| Returns a reference to the callout's property collection, used for data defined overrides. More... | |
| const QgsPropertyCollection & | dataDefinedProperties () const |
| Returns a reference to the callout's property collection, used for data defined overrides. More... | |
| virtual DrawOrder | drawOrder () const |
| Returns the desired drawing order (stacking) to use while rendering this callout. More... | |
| bool | enabled () const |
Returns true if the the callout is enabled. More... | |
| void | render (QgsRenderContext &context, QRectF rect, const double angle, const QgsGeometry &anchor, QgsCalloutContext &calloutContext) |
| Renders the callout onto the specified render context. More... | |
| virtual void | restoreProperties (const QDomElement &element, const QgsReadWriteContext &context) |
| Restores the callout's properties from a DOM element. More... | |
| virtual bool | saveProperties (QDomDocument &doc, QDomElement &element, const QgsReadWriteContext &context) const |
| Saves the current state of the callout to a DOM element. More... | |
| void | setAnchorPoint (AnchorPoint anchor) |
| Sets the feature's anchor point position. More... | |
| void | setDataDefinedProperties (const QgsPropertyCollection &collection) |
| Sets the callout's property collection, used for data defined overrides. More... | |
| void | setEnabled (bool enabled) |
| Sets whether the callout is enabled. More... | |
Static Public Member Functions | |
| static QgsCallout * | create (const QVariantMap &properties=QVariantMap(), const QgsReadWriteContext &context=QgsReadWriteContext()) |
| Creates a new QgsManhattanLineCallout, using the settings serialized in the properties map (corresponding to the output from QgsManhattanLineCallout::properties() ). More... | |
| Static Public Member Functions inherited from QgsSimpleLineCallout | |
| static QgsCallout * | create (const QVariantMap &properties=QVariantMap(), const QgsReadWriteContext &context=QgsReadWriteContext()) |
| Creates a new QgsSimpleLineCallout, using the settings serialized in the properties map (corresponding to the output from QgsSimpleLineCallout::properties() ). More... | |
| Static Public Member Functions inherited from QgsCallout | |
| static QgsCallout::AnchorPoint | decodeAnchorPoint (const QString &name, bool *ok=nullptr) |
| Attempts to decode a string representation of an anchor point name to the corresponding anchor point. More... | |
| static QString | encodeAnchorPoint (AnchorPoint anchor) |
| Encodes an anchor point to its string representation. More... | |
| static QgsPropertiesDefinition | propertyDefinitions () |
| Returns the definitions for data defined properties available for use in callouts. More... | |
Protected Member Functions | |
| void | draw (QgsRenderContext &context, QRectF bodyBoundingBox, const double angle, const QgsGeometry &anchor, QgsCallout::QgsCalloutContext &calloutContext) override |
| Performs the actual rendering of the callout implementation onto the specified render context. More... | |
Additional Inherited Members | |
| Public Types inherited from QgsCallout | |
| enum | AnchorPoint { PoleOfInaccessibility = 0, PointOnExterior, PointOnSurface, Centroid } |
| Feature's anchor point position. More... | |
| enum | DrawOrder { OrderBelowAllLabels, OrderBelowIndividualLabels } |
| Options for draw order (stacking) of callouts. More... | |
| enum | Property { MinimumCalloutLength, OffsetFromAnchor, OffsetFromLabel, DrawCalloutToAllParts, AnchorPointPosition } |
| Data definable properties. More... | |
Detailed Description
Draws straight (right angled) lines as callouts.
- Since
- QGIS 3.10
Definition at line 567 of file qgscallout.h.
Constructor & Destructor Documentation
◆ QgsManhattanLineCallout() [1/2]
| QgsManhattanLineCallout::QgsManhattanLineCallout | ( | ) |
Definition at line 426 of file qgscallout.cpp.
◆ QgsManhattanLineCallout() [2/2]
| QgsManhattanLineCallout::QgsManhattanLineCallout | ( | const QgsManhattanLineCallout & | other | ) |
Copy constructor.
Definition at line 430 of file qgscallout.cpp.
Member Function Documentation
◆ clone()
|
overridevirtual |
Duplicates a callout by creating a deep copy of the callout.
Caller takes ownership of the returned object.
Reimplemented from QgsSimpleLineCallout.
Definition at line 449 of file qgscallout.cpp.
◆ create()
|
static |
Creates a new QgsManhattanLineCallout, using the settings serialized in the properties map (corresponding to the output from QgsManhattanLineCallout::properties() ).
Definition at line 437 of file qgscallout.cpp.
◆ draw()
|
overrideprotectedvirtual |
Performs the actual rendering of the callout implementation onto the specified render context.
The bodyBoundingBox argument gives the desired size and position of the body of the callout (e.g. the actual label geometry). The angle argument specifies the rotation of the callout body (in degrees clockwise from horizontal). It is assumed that angle rotation specified via angle is applied around the center of rect.
The anchor argument dictates the geometry which the callout should connect to. Depending on the callout subclass and anchor geometry type, the actual shape of the rendered callout may vary. E.g. a subclass may prefer to attach to the centroid of the anchor, while another subclass may prefer to attach to the closest point on anchor instead.
Both rect and anchor are specified in painter coordinates (i.e. pixels).
The calloutContext argument is used to specify additional contextual information about how a callout is being rendered.
Reimplemented from QgsSimpleLineCallout.
Definition at line 454 of file qgscallout.cpp.
◆ operator=()
|
delete |
◆ type()
|
overridevirtual |
Returns a unique string representing the callout type.
Reimplemented from QgsSimpleLineCallout.
Definition at line 444 of file qgscallout.cpp.
The documentation for this class was generated from the following files:
- /build/qgis-3.10.0+15buster/src/core/callouts/qgscallout.h
- /build/qgis-3.10.0+15buster/src/core/callouts/qgscallout.cpp
