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piano-midi-monitor
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Simple monitor for displaying MIDI status for digital pianos.
Du kannst nicht mehr als 25 Themen auswählen Themen müssen entweder mit einem Buchstaben oder einer Ziffer beginnen. Sie können Bindestriche („-“) enthalten und bis zu 35 Zeichen lang sein.
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piano-midi-monitor/pages/piano.html

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  1. <!DOCTYPE html>

  2. <html lang="en-PH">

  3.   <head>

  4.     <meta charset="UTF-8">

  5.     <title>Piano</title>

  6.     <meta

  7.       http-equiv="Content-Security-Policy"

  8.       content="script-src 'self' 'unsafe-inline';"

  9.     />

  10.     <style>

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  14.       }

  15. 

  16.       body {

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  20.         align-items: center;

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  24. 

  25.       svg {

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  28. 

  29.       .natural {

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  34.         background-image: url('./piano/natural.png');

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  36. 

  37.       .accidental {

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  42.         background-image: url('./piano/accidental.png');

  43.       }

  44. 

  45.       #pedals {

  46.         display: flex;

  47.         justify-content: space-between;

  48.         align-items: center;

  49.         width: 0;

  50.         flex: auto;

  51.         padding: 0 1rem;

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  53.         background-color: black;

  54.         color: white;

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  56.       }

  57.     </style>

  58.   </head>

  59.   <body>

  60.     <div

  61.       id="keyboard"

  62.       style="width: 944px; height: 100%; position: relative;"

  63.     ></div>

  64.     <div id="pedals">

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  120.                 d="M0.085,-0.261C0.131,-0.261 0.167,-0.314 0.167,-0.375C0.167,-0.402 0.162,-0.407 0.156,-0.407C0.148,-0.407 0.147,-0.398 0.142,-0.381C0.138,-0.366 0.126,-0.333 0.096,-0.333C0.067,-0.333 0.059,-0.359 0.059,-0.381L0.059,-0.385C0.062,-0.479 0.16,-0.529 0.245,-0.529C0.253,-0.529 0.259,-0.528 0.259,-0.522C0.259,-0.514 0.25,-0.502 0.244,-0.492C0.229,-0.469 0.19,-0.406 0.19,-0.379C0.19,-0.353 0.231,-0.308 0.245,-0.289C0.258,-0.271 0.286,-0.244 0.286,-0.211C0.286,-0.191 0.28,-0.178 0.265,-0.158C0.252,-0.14 0.251,-0.139 0.232,-0.132C0.188,-0.116 0.102,-0.061 0.102,-0.02C0.102,-0.003 0.119,0.008 0.136,0.008C0.166,0.008 0.194,-0.023 0.238,-0.075L0.252,-0.092C0.257,-0.098 0.261,-0.104 0.269,-0.104C0.309,-0.104 0.324,0.003 0.377,0.003C0.394,0.003 0.407,0 0.438,-0.029L0.464,-0.054C0.468,-0.058 0.472,-0.062 0.476,-0.062C0.478,-0.062 0.479,-0.06 0.483,-0.052C0.498,-0.02 0.523,0.006 0.562,0.006C0.593,0.006 0.621,-0.009 0.657,-0.046C0.674,-0.064 0.681,-0.074 0.686,-0.074C0.69,-0.074 0.692,-0.069 0.696,-0.062C0.715,-0.025 0.748,0.003 0.8,0.003C0.86,0.003 0.923,-0.057 0.923,-0.172C0.923,-0.386 0.727,-0.462 0.55,-0.498C0.545,-0.499 0.538,-0.5 0.532,-0.5C0.522,-0.5 0.519,-0.494 0.519,-0.488C0.519,-0.481 0.525,-0.476 0.542,-0.472C0.714,-0.431 0.849,-0.35 0.849,-0.154C0.849,-0.085 0.837,-0.027 0.8,-0.027C0.767,-0.027 0.745,-0.092 0.745,-0.159C0.745,-0.218 0.754,-0.262 0.786,-0.294C0.792,-0.3 0.793,-0.303 0.793,-0.307C0.793,-0.313 0.789,-0.318 0.782,-0.318C0.777,-0.318 0.77,-0.316 0.759,-0.31C0.71,-0.283 0.677,-0.234 0.677,-0.15L0.677,-0.132C0.677,-0.111 0.675,-0.104 0.655,-0.084C0.624,-0.053 0.609,-0.048 0.592,-0.048C0.567,-0.048 0.546,-0.081 0.539,-0.103C0.538,-0.107 0.537,-0.11 0.537,-0.113C0.537,-0.116 0.539,-0.118 0.546,-0.123L0.556,-0.13C0.602,-0.163 0.651,-0.197 0.651,-0.254C0.651,-0.293 0.625,-0.315 0.586,-0.315C0.494,-0.315 0.462,-0.23 0.462,-0.151C0.462,-0.137 0.463,-0.122 0.466,-0.106L0.466,-0.102C0.466,-0.099 0.465,-0.097 0.46,-0.093C0.444,-0.082 0.434,-0.077 0.42,-0.077C0.397,-0.077 0.379,-0.094 0.362,-0.111C0.345,-0.128 0.329,-0.137 0.313,-0.141C0.302,-0.144 0.296,-0.143 0.296,-0.147C0.296,-0.15 0.298,-0.153 0.303,-0.16C0.322,-0.187 0.354,-0.236 0.354,-0.27C0.354,-0.302 0.333,-0.321 0.298,-0.362C0.269,-0.396 0.256,-0.416 0.256,-0.437C0.256,-0.45 0.267,-0.48 0.279,-0.5C0.295,-0.527 0.31,-0.53 0.321,-0.53C0.375,-0.53 0.424,-0.489 0.424,-0.433C0.424,-0.411 0.41,-0.399 0.392,-0.399C0.375,-0.399 0.361,-0.404 0.348,-0.418C0.342,-0.424 0.338,-0.432 0.329,-0.432C0.323,-0.432 0.319,-0.427 0.319,-0.419C0.319,-0.396 0.354,-0.327 0.419,-0.327C0.465,-0.327 0.494,-0.364 0.494,-0.408C0.494,-0.515 0.385,-0.555 0.293,-0.555L0.287,-0.555C0.227,-0.554 0.181,-0.548 0.124,-0.52C0.074,-0.495 0,-0.439 0,-0.359C0,-0.315 0.026,-0.261 0.085,-0.261ZM0.976,0C1.001,0 1.019,-0.018 1.019,-0.043C1.019,-0.068 1.001,-0.086 0.976,-0.086C0.951,-0.086 0.933,-0.068 0.933,-0.043C0.933,-0.018 0.951,0 0.976,0ZM0.525,-0.196C0.525,-0.24 0.536,-0.28 0.566,-0.28C0.582,-0.28 0.589,-0.266 0.589,-0.238C0.589,-0.205 0.572,-0.181 0.542,-0.157C0.537,-0.153 0.533,-0.151 0.531,-0.151C0.529,-0.151 0.527,-0.153 0.527,-0.158C0.526,-0.17 0.525,-0.182 0.525,-0.196Z"

  121.                 style="fill-rule:nonzero;"

  122.               />

  123.             </g>

  124.           </g>

  125.         </g>

  126.       </svg>

  127.     </div>

  128. 

  129.     <script>

  130.       const X_OFFSET = 0

  131.       const NATURAL_KEY_WIDTH = 15;

  132.       const ACCIDENTAL_KEY_WIDTH = 9;

  133.       const accidental_key_x_offsets = [

  134.         10.0 / 112.0,

  135.         28.0 / 112.0,

  136.         57.0 / 112.0,

  137.         75.0 / 112.0,

  138.         93.0 / 112.0,

  139.       ]

  140. 

  141.       const { ipcRenderer, } = require('electron')

  142. 

  143.       const renderKeys = () => {

  144.         let midi_note = 12

  145.         let element

  146.         const keyboard = window.document.getElementById('keyboard')

  147.         for (let octave = 0; octave < 9; octave += 1) {

  148.           for (let natural_key = 0; natural_key < 7; natural_key += 1) {

  149.             element = window.document.createElement('div')

  150.             element.setAttribute('id', 'n' + midi_note)

  151.             element.classList.add('natural')

  152.             element.style.position = 'absolute'

  153.             element.style.top = 0

  154.             element.style.left = X_OFFSET + (octave * NATURAL_KEY_WIDTH * 7) + (natural_key * NATURAL_KEY_WIDTH - 1) +

  155.               'px'

  156.             element.style.width = NATURAL_KEY_WIDTH + 1 + 'px'

  157.             keyboard.appendChild(element)

  158. 

  159.             switch (natural_key) {

  160.               case 0:

  161.               case 1:

  162.               case 3:

  163.               case 4:

  164.               case 5:

  165.                 midi_note += 2;

  166.                 break;

  167.               case 2:

  168.               case 6:

  169.                 midi_note += 1;

  170.                 break;

  171.               default:

  172.                 break;

  173.             }

  174.           }

  175. 

  176.           midi_note -= 11;

  177. 

  178.           for (let accidental_key = 0; accidental_key < 5; accidental_key += 1) {

  179.             element = window.document.createElement('div')

  180.             element.classList.add('accidental')

  181.             element.setAttribute('id', 'n' + midi_note)

  182.             element.style.position = 'absolute'

  183.             element.style.top = 0

  184.             element.style.left = X_OFFSET + (octave * NATURAL_KEY_WIDTH * 7) + (NATURAL_KEY_WIDTH * 7 *

  185.               accidental_key_x_offsets[accidental_key]) + 'px'

  186.             element.style.width = ACCIDENTAL_KEY_WIDTH + 'px'

  187.             keyboard.appendChild(element)

  188. 

  189.             switch (accidental_key) {

  190.               case 0:

  191.               case 2:

  192.               case 3:

  193.                 midi_note += 2;

  194.                 break;

  195.               case 1:

  196.               case 4:

  197.                 midi_note += 3;

  198.                 break;

  199.               default:

  200.                 break;

  201.             }

  202.           }

  203. 

  204.           midi_note -= 1;

  205.         }

  206.       }

  207. 

  208.       ipcRenderer.on('note', (event, message) => {

  209.         const [key, value, ] = message.split(':')

  210.         window.document.getElementById('n' + key).style.backgroundColor = value > 0 ? 'red' : null

  211.       })

  212. 

  213.       renderKeys(null, null)

  214. 

  215.       ipcRenderer.on('pedal', (event, message) => {

  216.         console.log(message)

  217.         const [which, value, ] = message.split(':')

  218.         const pedalIds = {

  219.           64: 'sustain',

  220.           66: 'sostenuto',

  221.           67: 'unacorda',

  222.         }

  223. 

  224.         console.log(window.document.getElementById(pedalIds[which]))

  225. 

  226.         window.document.getElementById(pedalIds[which]).style.opacity = value / 127 * 0.75 + 0.25

  227.       })

  228.     </script>

  229.   </body>

  230. </html>