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ReasonML p5.js Stopwatch
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| type p5; | |
| type sketch = { | |
| mutable setup: unit => unit, | |
| mutable draw: unit => unit, | |
| }; | |
| type button; | |
| type state = | |
| | Initializing | |
| | NotStarted(button) | |
| | Running(button, int) | |
| | Stopped(button, int); | |
| [@bs.module] [@bs.new] external createP5: (sketch => unit) => p5 = "p5"; | |
| [@bs.send] external createCanvas: (sketch, int, int) => unit = "createCanvas"; | |
| [@bs.send] external noCanvas: sketch => unit = "noCanvas"; | |
| [@bs.send] external millis: sketch => int = "millis"; | |
| [@bs.send] external createButton: (sketch, string) => button = "createButton"; | |
| [@bs.send] external html: (button, string) => unit = "html"; | |
| [@bs.send] | |
| external mousePressed: (button, unit => unit) => unit = "mousePressed"; | |
| [@bs.send] external nfc: (sketch, float, int) => string = "nfc"; | |
| let makeSketch = s => { | |
| let appState = ref(Initializing); | |
| let btnPressed = () => { | |
| switch (appState^) { | |
| | NotStarted(btn) => appState := Running(btn, millis(s)) | |
| | Running(btn, time) => appState := Stopped(btn, time) | |
| | Stopped(btn, _) => | |
| appState := NotStarted(btn); | |
| html(btn, "Start"); | |
| | _ => () | |
| }; | |
| }; | |
| s.setup = ( | |
| () => { | |
| noCanvas(s); | |
| let btn = createButton(s, "Start"); | |
| mousePressed(btn, btnPressed); | |
| appState := NotStarted(btn); | |
| } | |
| ); | |
| s.draw = ( | |
| () => { | |
| switch (appState^) { | |
| | Running(btn, time) => | |
| let seconds = float(millis(s) - time) /. 1000.0; | |
| let str = nfc(s, seconds, 2); | |
| html(btn, str ++ " Seconds"); | |
| | _ => () | |
| }; | |
| } | |
| ); | |
| }; | |
| createP5(makeSketch); |
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