Custom Controls

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User inputs are handled by the InputHandler which is part of SceneryBase and Hubable. Adding inputs can be done in an overwrite of the inputSetup method of SceneryBase. First a Behavior needs to be added before a key can be assigned.
Adding a Behavior
A behavior defines an action which is executed when the corresponding keys are pressed. There are currently the following base behaviors from which can be inherited: ClickBehavior, DragBehavior, ScrollBehavior.
In most cases a ClickBehavior is used. Example:
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val helloClick = object : ClickBehaviour {
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    val output = "Hello World"
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​
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    override fun click(x: Int, y: Int) {
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        logger.info(output + "at $x and $y")
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    }
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}
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For cases where the x and y screen positions of the cursor are not needed they are just ignored. Adding a behavior to the InputHandler is straightforward:
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inputHandler?.addBehaviour("hello_click", helloClick)
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inputHandler should be available from an overwrite of the inputSetup method.
Assigning Keys to Behaviors
Assigning keys to a behavior works in a similiar fashion:
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inputHandler?.addKeyBinding("hello_click", "button1")
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This code assigned the earlied added behavior to the first mouse button.
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inputHandler?.addKeyBinding("hello_click", "M")
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Does the same but for the "M" key.
For more on the available keys and combinations thereof see InputTrigger syntax​

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Contents

Adding a Behavior

Assigning Keys to Behaviors