161 lines
3.6 KiB
HTML
161 lines
3.6 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>display</title>
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<style>
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body{
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background: #000;
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padding: 0;
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margin: 0;
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max-width: 100%;
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max-height: 100vh;
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}
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body.meter {
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background: rgb(117, 117, 117);
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}
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#img {
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position: absolute;
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/*background-image: url(".../img/background.jpg");*/
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background-repeat:no-repeat;
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background-size: contain;
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background-position: center;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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}
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#can{
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margin: 0;
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background: #fff;
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display: none;
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position: fixed;
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left: 0;
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top: 0;
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}
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#can.show{
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display: block;
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}
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</style>
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</head>
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<body>
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<div id="img">
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</div>
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<canvas id="can">
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</canvas>
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<script>
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'use strict';
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const { remote, ipcRenderer } = require('electron')
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async function setImage (src) {
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return new Promise(async (resolve, reject) => {
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//let img = new Image()
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let img = document.getElementById('img')
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let body = document.querySelector('body')
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if (body.classList.contains('meter')) {
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body.classList.remove('meter')
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}
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img.style.backgroundImage = `url('${src}')`;
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//img.onload = () => {
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//document.body.appendChild(img)
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//return resolve(img)
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//}
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//img.onerror = reject
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//img.src = src
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})
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}
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async function setMeter () {
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let body = document.querySelector('body')
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if (!body.classList.contains('meter')) {
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body.classList.add('meter')
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}
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}
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async function setGrid () {
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const can = document.getElementById('can')
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const ctx = can.getContext('2d')
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if (!can.classList.contains('show')) {
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can.classList.add('show')
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}
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can.width = window.innerWidth
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can.height = window.innerHeight
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can.style.width = `${window.innerWidth}px`
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can.style.height = `${window.innerHeight}px`
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try{
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await drawGrid(can, ctx)
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} catch (err) {
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alert(JSON.stringify(err))
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}
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}
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async function drawGrid (can, ctx) {
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const count = 20
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const half = Math.round(count / 2)
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const w = can.width
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const h = can.height
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const wsec = w / count
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const hsec= h / count
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ctx.moveTo(w / 2, 0)
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ctx.lineTo(w / 2, h)
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ctx.stroke()
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ctx.moveTo(0, h / 2)
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ctx.lineTo(w, h / 2)
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ctx.stroke()
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for (let i = 0; i < count; i++) {
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ctx.moveTo(wsec * i, hsec * i)
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ctx.lineTo(wsec * i, h - (hsec * i))
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ctx.stroke()
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ctx.moveTo(wsec * i, hsec * i)
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ctx.lineTo(w - (wsec * i), hsec * i)
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ctx.stroke()
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}
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ctx.font = '30px Arial'
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for (let i = 0; i < half; i++) {
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ctx.fillText(`${(half - i)}`, (wsec * i) + 15, (h / 2) - 15)
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ctx.fillText(`${(half - i)}`, (w - (wsec * i)) - 25, (h / 2) - 15)
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ctx.fillText(`${(half - i)}`, (w / 2) + 15, (hsec * i) + 25 )
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ctx.fillText(`${(half - i)}`, (w / 2) + 15, (h - (hsec * i)) - 15)
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}
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}
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async function onDigital (event, arg) {
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console.log('called')
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if (arg.src) {
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try {
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await setImage(arg.src)
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} catch (err) {
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console.error(err)
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}
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} else if (arg.meter) {
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try {
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await setMeter()
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} catch (err) {
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console.error(err)
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}
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} else if (arg.grid) {
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try {
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await setGrid()
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} catch (err) {
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console.error(err)
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}
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}
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return event.returnValue = true
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}
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async function onEscape (evt) {
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let isEscape = false
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let win
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evt = evt || window.event
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if ('key' in evt) {
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isEscape = (evt.key == 'Escape' || evt.key == 'Esc')
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} else {
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isEscape = (evt.keyCode == 27)
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}
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if (isEscape) {
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win = remote.getCurrentWindow()
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win.close()
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}
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}
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ipcRenderer.on('display', onDigital)
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document.onkeydown = onEscape
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</script>
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</body>
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</html> |