import org.openrndr.application
import org.openrndr.draw.loadFont
import org.openrndr.extra.envelopes.ADSRTracker

fun main() = application {
    program {
        val tracker = ADSRTracker(this)
        tracker.attack = 1.0
        tracker.decay = 0.2
        tracker.sustain = 0.8
        tracker.release = 2.0

        keyboard.keyDown.listen {
            if (it.name == "t")
                tracker.triggerOn()
        }
        keyboard.keyUp.listen {
            if (it.name == "t")
                tracker.triggerOff()
        }
        extend {
            tracker.values().forEach {
                drawer.circle(40.0, 40.0, 20.0 * it.value)
                drawer.translate(40.0, 0.0)
            }
            drawer.defaults()
            drawer.circle(drawer.bounds.center, 100.0 * tracker.value())

            drawer.fontMap = loadFont("demo-data/fonts/IBMPlexMono-Regular.ttf", 16.0)
            drawer.text("press and hold 't'", 20.0, height - 20.0)
        }
    }
}