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orx/orx-parameters/README.md
2023-08-28 08:33:33 +00:00

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# orx-parameters
Provides annotations and tools for turning Kotlin properties into introspectable parameters.
Used by [`orx-gui`](../orx-jvm/orx-gui/README.md) to automatically generate user interfaces.
Note that `orx-parameters` does _not_ generate user interfaces,
it only provides the information needed to create them.
For an example (and a highly usable implementation) of generating interfaces
from the annotations you are encouraged to check out [`orx-gui`](../orx-jvm/orx-gui/README.md).
Currently orx-parameters facilitates the following annotations:
- `DoubleParameter` for `Double` properties
- `IntParameter` for `Int` properties
- `BooleanParameter` for `Boolean` properties
- `TextParameter` for `String` properties
- `ColorParameter` for `ColorRGBa` properties
- `XYParameter` for `Vector2` properties
- `Vector2Parameter` for `Vector2` properties
- `Vector3Parameter` for `Vector3` properties
- `Vector4Parameter` for `Vector4` properties
- `DoubleListParameter` for `List<Double>` properties
- `OptionParameter` for `Enum` properties
Additionally there is an `ActionParameter` that can be used to annotate functions without arguments.
## Annotation application
Annotations can be applied to properties inside a class or object class.
```kotlin
val foo = object {
@DoubleParameter("a double scalar", 0.0, 1.0, order = 0)
var d = 1.0
@IntParameter("an integer scalar", 1, 100, order = 1)
var i = 1
@BooleanParameter("a boolean parameter", order = 2)
var b = false
@XYParameter("an XY parameter", order = 3)
var xy = Vector2.ZERO
@Vector2Parameter("a Vector2 parameter", order = 4)
var v2 = Vector2.ZERO
@Vector3Parameter("a Vector3 parameter", order = 5)
var v3 = Vector3.ZERO
@Vector4Parameter("a Vector4 parameter", order = 6)
var v4 = Vector4.ZERO
@ActionParameter("a simple action", order = 7)
fun actionFunction() {
// --
}
@DoubleListParameter("a double-list parameter", order = 8)
var dl = mutableListOf(0.0, 0.0, 0.0)
@OptionParameter("an option parameter", order = 9)
var option = SomeEnum.SomeValue
}
```
## Querying parameters
Given an instance of an annotated class we can list the parameters using the extension method
`Any.listParameters()` of our previously declared object `foo`
```kotlin
import org.openrndr.extra.parameters.listParameters
// ..
val parameters = foo.listParameters()
```