double press example (38ed9c38) · Commits · bsmrgo / splace-joysticks

README.md

+2 −2

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		@@ -9,7 +9,7 @@ Installation:

		go get github.com/splace/joysticks

		Example: play a note when pressing button #1. hat position changes frequency, y axis, and volume, x axis. (button #10 to exit)
		Example: play a note when pressing button #1. hat position changes frequency, y axis, and volume, x axis. (double press button #10 to exit)

		package main

		@@ -26,7 +26,7 @@ Example: play a note when pressing button #1. hat position changes frequency, y

		func main() {
		events := Capture(
		Channel{10, State.OnOpen}, // events[0] button #10 opens
		Channel{10, State.OnDouble}, // events[0] button #10 double pressed
		Channel{1, State.OnClose}, // events[1] button #1 closes
		Channel{1, State.OnMove}, // events[2] hat #1 moves
		)

0 → 100644

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		package main

		import (
		"io"
		"os/exec"
		"time"
		"math"
		)

		import . "github.com/splace/joysticks"

		import . "github.com/splace/sounds"

		func main() {
		events := Capture(
		Channel{10, State.OnDouble}, // event[0] button #10 double pressed
		Channel{1, State.OnClose}, // event[1] button #1 closes
		Channel{1, State.OnMove}, // event[2] hat #1 moves
		)
		var x float32 = .5
		var f time.Duration = time.Second / 440
		for {
		select {
		case <-events[0]:
		return
		case <-events[1]:
		play(NewSound(NewTone(f, float64(x)), time.Second/3))
		case h := <-events[2]:
		x = h.(HatChangeEvent).X/2 + .5
		f = time.Duration(100math.Pow(2, float64(h.(HatChangeEvent).Y))) time.Second / 44000
		}
		}
		}

		func play(s Sound) {
		cmd := exec.Command("aplay")
		out, in := io.Pipe()
		go func() {
		Encode(in, 2, 44100, s)
		in.Close()
		}()
		cmd.Stdin = out
		err := cmd.Run()
		if err != nil {
		panic(err)
		}
		}