Enums

An enum is an ordered list of entries, with a Value and a Display Name. The Value is the actual value being used within dataflows, while the Display Name is the text displayed in DRAW. Enums are treated as types within Olympe.

Let's have an example of an enum called "Currencies":

enum Currencies
{
   EUR,
   USD,
   CHF
}

Create an Enum Folder

Create one by drag-and-dropping the Enum component from the Marketplace on the right side of the screen into the main editor.

Define the enums

After creating the enum, you can populate its values.

Each entry in an enum has a value, which is an internal value used by the enum and a display name, which can be a different text to be displayed to users. Reusing our list of currencies above, the value USD could have US Dollar as display name, and CHF have Swiss Franc. The ordering of the values can also be changed using the up/down arrows.

Using an enum

Enums are seen as new types within DRAW. They can therefore be used wherever types are used:

• As types of properties within Data Types and Config Data Types
• As types of inputs and outputs in actions and functions.
  • Ex: Core uses an enum to define the possible log levels for the Debug Log and Log bricks. See their definition here: https://community.olympe.io/#editedItem=0179b269b5c75228d70f
• As types of properties in visual components.
  • Ex: Core uses enums to simplify the use of UI elements such as the Button, which can take several predefined variants. See their definitions here: https://community.olympe.io/#editedItem=017c78c7a7b6795d5151

Reusing an enum in another project

In case the current project is imported by other projects, you may want to set the visibility of the enum to public. By doing so, the enum will be visible within the importing projects.