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n2-kbd.html
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<!DOCTYPE html>
<!--
Author: Peter Jensen
-->
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Nascom 2 Keyboard</title>
<style>
:root {
--container-width:100%;
--key-width:49px;
--key-border-width:2px;
--key-margin:2px;
}
@media (min-width: 1000px) {
:root {
--container-width:50%;
}
}
.n2k-container {
width:var(--container-width);
font-size: 20pt;
font-family:Arial, Helvetica, sans-serif;
color:white;
}
.n2k-row {
display: flex;
}
.n2k-key {
display: inline-flex;
border: var(--key-border-width) black solid;
border-radius: 8px;
width:var(--key-width);
aspect-ratio:1;
justify-content: center;
align-items: center;
flex-direction: column;
padding: 0px;
margin: var(--key-margin);
background: rgb(162, 134, 107);
cursor:pointer;
}
.n2k-key:active {
background:rgb(90,59,40);
}
.n2k-medium-font {
font-size:0.75em;
}
.n2k-small-font {
font-size:0.5em;
}
.n2k-key.n2k-medium-font > div {
margin-bottom:0px;
margin-top:0px;
}
</style>
</head>
<body onload="Ui.init()" onresize="Ui.init()">
<script>
class Ui {
static makeKeyboardKey(key) {
let $key = Ui.d.createElement("div");
$key.classList.add("n2k-key");
$key.setAttribute("role", "button");
let labels = key.labels;
if (Array.isArray(labels) && labels.length == 2) {
let $upper = Ui.d.createElement("div");
$upper.innerHTML = labels[0];
let $lower = Ui.d.createElement("div");
$lower.innerHTML = labels[1];
$key.appendChild($upper);
$key.appendChild($lower);
$key.classList.add("n2k-medium-font");
if (labels[0][0] != '&' && (labels[0].length > 1 || labels[1].length > 1)) {
$key.classList.add("n2k-small-font");
}
}
else {
$key.innerHTML = labels;
if (labels[0] != '&' && labels.length > 1) {
$key.classList.add("n2k-small-font");
}
}
if (typeof (key.size) !== "undefined") {
let newWidth = (key.size * (Ui.keyWidth + 2*(Ui.keyBorderWidth + Ui.keyMargin)) - 2*(Ui.keyMargin + Ui.keyBorderWidth));
$key.style.width = newWidth + "px";
$key.style.aspectRatio = newWidth/Ui.keyWidth;
}
else {
$key.style.width = Ui.keyWidth + "px";
}
return $key;
}
static makeKeyboardRow(row) {
let $row = Ui.d.createElement("div");
$row.classList.add("n2k-row");
for (let k of row.keys) {
let $key = Ui.makeKeyboardKey(k);
$row.appendChild($key);
}
$row.style.marginLeft = (row.offset * Ui.keyWidth) + "px";
return $row;
}
static makeKeyboard(kbd) {
let $container = Ui.d.createElement("div");
$container.classList.add("n2k-container");
for (let row of kbd.rows) {
let r = Ui.makeKeyboardRow(row);
$container.appendChild(r);
}
return $container;
}
static init() {
if (Ui.$kbd != null) {
Ui.$kbd.remove();
Ui.$kbd = null;
}
let rootStyle = getComputedStyle(Ui.d.body);
let bodyWidth = Ui.d.body.clientWidth;
Ui.keyBorderWidth = parseInt(rootStyle.getPropertyValue("--key-border-width").slice(0, -2));
Ui.keyMargin = parseInt(rootStyle.getPropertyValue("--key-margin").slice(0, -2));
//Ui.keyWidth = parseInt(rootStyle.getPropertyValue("--key-width").slice(0, -2));
Ui.keyWidth = bodyWidth/14 - 2*(Ui.keyBorderWidth + Ui.keyMargin);
Ui.keyWidth = Ui.keyWidth - 0.25*Ui.keyWidth/14;
let $kbd = Ui.makeKeyboard(Ui.keyboard);
Ui.$kbd = $kbd;
Ui.d.body.appendChild($kbd);
}
}
// These definitions should be inside the Ui class definition as static members, but Safari :(
Ui.keyboard = {
rows: [
{offset: 0.5,
keys: [{labels:['!', '1']}, {labels:['"', '2']}, {labels:['£', '3']}, {labels:['$', '4']},
{labels:['%', '5']}, {labels:['&', '6']}, {labels:["'", '7']}, {labels:['(', '8']},
{labels:[')', '9']}, {labels:['↑', '0']}, {labels:['=', '-']},
{labels:['\\', '[']}, {labels:['_', ']']}]},
{offset: 0,
keys: [{labels:'GRAPH'}, {labels:'Q'}, {labels:'W'}, {labels:'E'}, {labels:'R'}, {labels:'T'},
{labels:'Y'}, {labels:'U'}, {labels:'I'}, {labels:'O'}, {labels:'P'}, {labels:'@'},
{labels:['CS', 'BACK']}]},
{offset: 0.25,
keys: [{labels:'CTRL'}, {labels:'A'}, {labels:'S'}, {labels: 'D'}, {labels:'F'}, {labels:'G'},
{labels:'H'}, {labels:'J'}, {labels:'K'}, {labels:'L'}, {labels:['+',';']},
{labels:['*', ':']}, {labels:['ESC', 'ENTER']}, {labels:['LF', 'CH']}]},
{offset: 0.75,
keys: [{labels:'SHIFT'}, {labels:'Z'}, {labels:'X'}, {labels:'C'}, {labels:'V'}, {labels:'B'},
{labels:'N'}, {labels:'M'}, {labels:['<', ',']}, {labels: ['>', '.']}, {labels:['?','/']},
{labels:'SHIFT'}]},
{offset: 0.75,
keys: [{labels:'←'}, {labels:'↑'}, {labels:' ', size:8}, {labels:'↓'}, {labels:'→'}]}
]
};
Ui.d = document; // shorthand
Ui.$kbd = null;
</script>
</body>
</html>