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LabelAngle Class | ArcGIS Maps SDK for Qt

Specifies how to calculate the angular position and layout direction for labels on or around point feature symbols. More...

Member Function Documentation [explicit] LabelAngle::LabelAngle(Esri::ArcGISRuntime::ArcadeExpression *arcadeExpression, QObject *parent = nullptr)

Creates a LabelAngle with the specified ArcadeExpression.

arcadeExpression - A complete, self-contained Arcade expression that calculates an angle in degrees.
parent - The optional parent QObject.

The rotationType will be defaulted to LabelAngleRotationType::Automatic.

LabelAngle::LabelAngle(Esri::ArcGISRuntime::ArcadeExpression *arcadeExpression, Esri::ArcGISRuntime::LabelAngleRotationType rotationType, QObject *parent = nullptr)

Creates a LabelAngle with the specified ArcadeExpression and LabelAngleRotationType.

arcadeExpression - A complete, self-contained Arcade expression that calculates an angle in degrees.
rotationType - Whether the angle should be interpreted as arithmetic or geographic.
parent - The optional parent QObject.

[override virtual noexcept] LabelAngle::~LabelAngle()

Destructor.

Esri::ArcGISRuntime::ArcadeExpression *LabelAngle::angleExpression() const

Specifies and returns how the angle (in degrees) is calculated from the feature attributes, using an Arcade expression.

The calculation may use attributes, fixed numbers, or a combination of both. The default value is an ArcadeExpression containing an empty expression string, which will produce a zero angle when evaluated.

Note: If the expression attempts to use attributes which don't exist then no label will be produced. This is distinct from the attribute existing but having a null or empty value, which will be interpreted as a zero angle.

See also setAngleExpression().

[since Esri::ArcGISRuntime 200.1] Esri::ArcGISRuntime::LabelAngle *LabelAngle::clone(QObject *parent = nullptr) const

Clones the LabelAngle to a new instance with an optional parent.

Returns a new instance of the current LabelAngle.

This function was introduced in Esri::ArcGISRuntime 200.1.

[static] Esri::ArcGISRuntime::LabelAngle *LabelAngle::fromJson(const QString &json, QObject *parent = nullptr)

Creates a new LabelAngle from json string with an optional parent.

See also JsonSerializable.

Esri::ArcGISRuntime::LabelAngleRotationType LabelAngle::rotationType() const

Returns the rotation type angle (arithmetic or geographic).

The default value is LabelAngleRotationType::Automatic (which will be interpreted as LabelAngleRotationType::Arithmetic).

See also setRotationType().

void LabelAngle::setAngleExpression(Esri::ArcGISRuntime::ArcadeExpression *angleExpression)

Sets the angleExpression to angleExpression.

See also angleExpression.

void LabelAngle::setRotationType(Esri::ArcGISRuntime::LabelAngleRotationType rotationType)

Sets the rotationType to rotationType.

See also rotationType.

[override virtual] QString LabelAngle::toJson() const

Reimplements: JsonSerializable::toJson() const.

Gets the JSON string representation of this object.

See also JsonSerializable.

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