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main.html
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<!DOCTYPE html>
<html>
<head>
<style>
.app {
display: flex;
flex-direction: column;
align-items: center;
}
#display {
display: flex;
margin: 20px;
}
#display > svg {
margin-right: 10px;
}
#display > svg:last-child {
margin-right: 0;
}
svg {
display: block;
}
.pixel {
fill: #EEEEEE;
}
.filledPixel {
fill: #424242;
}
</style>
</head>
<body>
<div class="app">
<h1>Pictures</h1>
<div id="canvasParent"></div>
<p id="serializedPicture"></p>
<div>
<button id="clearButton">clear</button>
<button id="addButton">add</button>
</div>
<div id="display"></div>
</div>
<script>
class Frame {
get width() {
return this.grid.columns * (this.pixel.width + this.pixel.spacing) - this.pixel.spacing;
}
get height() {
return this.grid.rows * (this.pixel.height + this.pixel.spacing) - this.pixel.spacing;
}
constructor(pixel, grid, isInteractive = false) {
this.pixel = pixel;
this.grid = grid;
this.isInteractive = isInteractive;
this.onPixelClick = this.onPixelClick.bind(this);
this.element = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
this.element.setAttribute('viewBox', `0 0 ${this.width} ${this.height}`);
this.element.style.width = `${this.width}px`;
this.element.style.height = `${this.height}px`;
var pixelIndex = 0;
for (let row = 0; row < grid.rows; row += 1) {
for (let column = 0; column < grid.columns; column += 1) {
let x = column * (pixel.width + pixel.spacing);
let y = row * (pixel.height + pixel.spacing);
const pixelRect = document.createElementNS('http://www.w3.org/2000/svg', 'rect');
pixelRect.setAttributeNS(null, 'data-index', pixelIndex);
pixelRect.setAttributeNS(null, 'x', x);
pixelRect.setAttributeNS(null, 'y', y);
pixelRect.setAttributeNS(null, 'width', pixel.width);
pixelRect.setAttributeNS(null, 'height', pixel.height);
pixelRect.setAttributeNS(null, 'rx', '10');
pixelRect.classList.add('pixel');
// Attach listeners.
if (this.isInteractive) {
pixelRect.addEventListener('click', this.onPixelClick);
}
this.element.appendChild(pixelRect);
pixelIndex += 1;
}
}
this.picture = null;
}
cloneIn(parent) {
const clone = new Frame(this.pixel, this.grid, false);
clone.display(this.picture);
clone.attachTo(parent);
}
attachTo(parent) {
parent.appendChild(this.element);
}
onPixelClick(event) {
const pixelIndex = Number.parseInt(event.target.getAttribute('data-index'));
this.picture.togglePixelAt(pixelIndex);
this.display();
}
display(nextPicture = null) {
if (nextPicture && this.picture !== nextPicture) {
this.clear();
this.picture = nextPicture;
this.element.setAttributeNS(null, 'data-picture', this.picture.serialized);
}
const pixels = this.element.querySelectorAll('rect');
for (var index = 0; index < pixels.length; index += 1) {
const pixel = pixels[index];
// Switch pixels on or off.
if (this.picture.serialized[index] === '1') {
pixel.classList.add('filledPixel');
} else {
pixel.classList.remove('filledPixel');
}
}
}
clear() {
this.picture = null;
const pixels = this.element.querySelectorAll('rect');
for (var index = 0; index < pixels.length; index += 1) {
pixels[index].classList.remove('filledPixel');
}
}
}
class Picture {
constructor(serialized) {
this.serialized = serialized;
}
togglePixelAt(index) {
this.serialized = (
this.serialized.slice(0, index) +
(this.serialized[index] === '0' ? '1' : '0') +
this.serialized.slice(index + 1, this.serialized.length)
);
}
}
const frame = new Frame(
{
width: 80,
height: 80,
spacing: 4
},
{
rows: 5,
columns: 5
},
true
);
frame.attachTo(document.querySelector('#canvasParent'));
frame.display(new Picture('0000000000000000000000000'));
// const url = new URL(window.location.href);
// const picture = new Picture(url.searchParams.get('picture'));
const displayElement = document.querySelector('#display');
const smallFrame = new Frame(
{
width: 10,
height: 10,
spacing: 2
},
{
rows: 5,
columns: 5
}
);
smallFrame.display(new Picture('1111010000111001000010000'));
smallFrame.cloneIn(displayElement);
smallFrame.display(new Picture('1000010000100001000011111'));
smallFrame.cloneIn(displayElement);
smallFrame.display(new Picture('0111010001100011000101110'));
smallFrame.cloneIn(displayElement);
smallFrame.display(new Picture('1000110101101011111101010'));
smallFrame.cloneIn(displayElement);
document.querySelector('#clearButton').addEventListener('click', () => {
frame.display(new Picture('0000000000000000000000000'));
});
document.querySelector('#addButton').addEventListener('click', () => {
smallFrame.display(frame.picture);
smallFrame.cloneIn(displayElement);
});
</script>
</body>
</html>