Specifies how to calculate the angular position and layout direction for labels on or around point feature symbols. More...
| Header | #include <Label |
| Since | Esri |
| Inherits | Esri |
Public Functions
| Label | |
| Label | |
| virtual | ~ |
| Esri | angle |
(since Esri Esri | clone(QObject *parent = nullptr) const |
| Esri | rotation |
| void | set |
| void | set |
Reimplemented Public Functions
| virtual QString | to |
Static Public Members
| Esri | from |
Detailed Description
The angular position may be different for each feature (driven by one or more feature attributes) or constant for all features (specified by a fixed number).
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.