Created
March 24, 2019 21:38
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JS Bin // source https://jsbin.com/somosim
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<title>JS Bin</title> | |
<style id="jsbin-css"> | |
/* Source: Bootstrap 4.2.1 */ | |
/* BEGIN BOOTSTRAP */ | |
body { | |
margin: 0; | |
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; | |
font-size: 1rem; | |
font-weight: 400; | |
line-height: 1.5; | |
color: #212529; | |
text-align: left; | |
background-color: #fff; | |
} | |
.container { | |
/* width: 100%; */ | |
padding-right: 15px; | |
padding-left: 15px; | |
margin-right: auto; | |
margin-left: auto; | |
} | |
.btn { | |
display: inline-block; | |
font-weight: 400; | |
color: #212529; | |
text-align: center; | |
vertical-align: middle; | |
-webkit-user-select: none; | |
-moz-user-select: none; | |
-ms-user-select: none; | |
user-select: none; | |
background-color: transparent; | |
border: 1px solid transparent; | |
padding: 0.375rem 0.75rem; | |
font-size: 1rem; | |
line-height: 1.5; | |
border-radius: 0.25rem; | |
transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out; | |
} | |
.btn-light { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
.btn-light:hover { | |
color: #212529; | |
background-color: #e2e6ea; | |
border-color: #dae0e5; | |
} | |
.btn-light:focus, .btn-light.focus { | |
box-shadow: 0 0 0 0.2rem rgba(216, 217, 219, 0.5); | |
} | |
.btn-light.disabled, .btn-light:disabled { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
button { | |
border-radius: 0; | |
} | |
button:focus { | |
outline: 1px dotted; | |
outline: 5px auto -webkit-focus-ring-color; | |
} | |
input, | |
button, | |
select, | |
optgroup, | |
textarea { | |
margin: 0; | |
font-family: inherit; | |
font-size: inherit; | |
line-height: inherit; | |
} | |
button, | |
input { | |
overflow: visible; | |
} | |
button, | |
select { | |
text-transform: none; | |
} | |
.text-center { | |
text-align: center !important; | |
} | |
.float-left { | |
float: left !important; | |
} | |
.float-right { | |
float: right !important; | |
} | |
/* END BOOTSTRAP */ | |
body { | |
background-color: #333; | |
} | |
#canvas { | |
border: 1px solid black; | |
margin-top: 20px; | |
} | |
#toolbar { | |
margin: 0 auto; | |
width: 100px; | |
} | |
.dot { | |
display: inline-block; | |
height: 31px; | |
width: 31px; | |
border-radius: 50%; | |
margin: 0 3px; | |
} | |
.color-option-selected { | |
height: 25px; | |
width: 25px; | |
border: 3px solid white; | |
} | |
/* .bg-red { | |
background-color: red; | |
} | |
.bg-blue { | |
background-color: blue; | |
} | |
.bg-yellow { | |
background-color: yellow; | |
} | |
.bg-orange { | |
background-color: orange; | |
} | |
.bg-green { | |
background-color: green; | |
} | |
.bg-purple { | |
background-color: purple; | |
} */ | |
body | |
</style> | |
</head> | |
<body> | |
<div class="container text-center"> | |
<canvas id="canvas"></canvas> | |
<div id="toolbar"> | |
<div id="color-selector" class="float-left"> | |
<!-- <span id="option-red" class="dot bg-red"></span> | |
<span id="option-blue" class="dot bg-blue"></span> | |
<span id="option-yellow" class="dot bg-yellow"></span> | |
<span id="option-orange" class="dot bg-orange"></span> | |
<span id="option-green" class="dot bg-green"></span> | |
<span id="option-purple" class="dot bg-purple"></span> --> | |
</div> | |
<div class="float-right"> | |
<button id="undo" class="btn btn-light" disabled>Undo</button> | |
</div> | |
</div> | |
</div> | |
<script id="jsbin-javascript"> | |
/* CONSTANTS */ | |
var pictureWidth = 60; | |
var pictureHeight = 40; | |
var dotDiameter = 10; | |
var colors = ["red", "blue", "yellow", "orange", "green", "purple", "brown", "black", "white"]; | |
/* STATE */ | |
var selectedColor = colors[0]; | |
var dots = []; | |
var countNewDots = 0; | |
// for (var r = 0; r < pictureHeight; r++) { | |
// var row = []; | |
// for (var c = 0; c < pictureWidth; c++) { | |
// row.push(null); | |
// } | |
// dots.push(row); | |
// } | |
/* CANVAS SETUP */ | |
var canvas = document.getElementById("canvas"); | |
canvas.width = pictureWidth * dotDiameter; | |
canvas.height = pictureHeight * dotDiameter; | |
document.getElementById("toolbar").style.width = (pictureWidth * dotDiameter) + "px"; | |
var ctx = canvas.getContext("2d"); | |
drawDots(); | |
/* DRAWING */ | |
function drawDot(x, y, color) { | |
ctx.beginPath(); | |
ctx.fillStyle = color; | |
ctx.arc(x, y, dotDiameter, 0, 2 * Math.PI); | |
ctx.fill(); | |
} | |
function drawDots() { | |
var oldAlpha = ctx.globalAlpha; | |
ctx.globalAlpha = 1; | |
ctx.fillStyle = "white"; | |
ctx.fillRect(0, 0, canvas.width, canvas.height); | |
ctx.globalAlpha = 0.75; | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
drawDot(dot.c * dotDiameter, dot.r * dotDiameter, dot.color); | |
} | |
// for (var r = 0; r < pictureHeight; r++) { | |
// for (var c = 0; c < pictureWidth; c++) { | |
// var color = dots[r][c]; | |
// if (color) { | |
// drawDot(c * dotDiameter, r * dotDiameter, color); | |
// } | |
// } | |
// } | |
ctx.globalAlpha = oldAlpha; | |
} | |
function getMousePos(canvas, evt) { | |
var rect = canvas.getBoundingClientRect(); | |
return { | |
x: evt.clientX - rect.left, | |
y: evt.clientY - rect.top | |
}; | |
} | |
/* PREVIEW DOT */ | |
canvas.addEventListener("mousemove", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
drawDots(); | |
drawDot(col * dotDiameter, row * dotDiameter, selectedColor); | |
// console.log("[MOVE] x: " + xPos + ", y: " + yPos); | |
}); | |
canvas.addEventListener("mouseleave", function(evt) { | |
drawDots(); | |
}); | |
/* ADD DOT */ | |
canvas.addEventListener("click", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
if (!dotAtPosition(row, col)) { | |
dots.push({ | |
c: col, | |
r: row, | |
color: selectedColor | |
}); | |
countNewDots++; | |
undoButton.removeAttribute("disabled"); | |
drawDots(); | |
} | |
// console.log("[CLICK] x: " + xPos + ", y: " + yPos); | |
}); | |
function dotAtPosition(row, col) { | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
if (dot.r === row && dot.c === col) { | |
return dot; | |
} | |
} | |
return null; | |
} | |
/* UNDO BUTTON */ | |
var undoButton = document.getElementById("undo"); | |
undoButton.addEventListener("click", function() { | |
if (countNewDots > 0) { | |
dots.pop(); | |
if (--countNewDots === 0) { | |
console.log("disabling undo button"); | |
undoButton.setAttribute("disabled", ""); | |
} | |
} | |
drawDots(); | |
}); | |
/* COLOR SELECTOR */ | |
var SELECTED_CLASS = "color-option-selected"; | |
function selectColorOption(color) { | |
return function() { | |
selectedColor = color; | |
var selectedColorOptions = document.getElementsByClassName(SELECTED_CLASS); | |
for (var i = 0; i < selectedColorOptions.length; i++) { | |
selectedColorOptions[i].classList.remove(SELECTED_CLASS); | |
} | |
document.getElementById("option-" + color).classList.add(SELECTED_CLASS); | |
}; | |
} | |
var colorSelector = document.getElementById("color-selector"); | |
for (var i = 0; i < colors.length; i++) { | |
var color = colors[i]; | |
var colorOption = document.createElement("span"); | |
colorOption.id = "option-" + color; | |
colorOption.classList.add("dot"); | |
if (color === selectedColor) { | |
colorOption.classList.add(SELECTED_CLASS); | |
} | |
colorOption.style.backgroundColor = color; | |
colorOption.addEventListener("click", selectColorOption(color)); | |
colorSelector.appendChild(colorOption); | |
} | |
</script> | |
<script id="jsbin-source-css" type="text/css">/* Source: Bootstrap 4.2.1 */ | |
/* BEGIN BOOTSTRAP */ | |
body { | |
margin: 0; | |
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; | |
font-size: 1rem; | |
font-weight: 400; | |
line-height: 1.5; | |
color: #212529; | |
text-align: left; | |
background-color: #fff; | |
} | |
.container { | |
/* width: 100%; */ | |
padding-right: 15px; | |
padding-left: 15px; | |
margin-right: auto; | |
margin-left: auto; | |
} | |
.btn { | |
display: inline-block; | |
font-weight: 400; | |
color: #212529; | |
text-align: center; | |
vertical-align: middle; | |
-webkit-user-select: none; | |
-moz-user-select: none; | |
-ms-user-select: none; | |
user-select: none; | |
background-color: transparent; | |
border: 1px solid transparent; | |
padding: 0.375rem 0.75rem; | |
font-size: 1rem; | |
line-height: 1.5; | |
border-radius: 0.25rem; | |
transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out; | |
} | |
.btn-light { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
.btn-light:hover { | |
color: #212529; | |
background-color: #e2e6ea; | |
border-color: #dae0e5; | |
} | |
.btn-light:focus, .btn-light.focus { | |
box-shadow: 0 0 0 0.2rem rgba(216, 217, 219, 0.5); | |
} | |
.btn-light.disabled, .btn-light:disabled { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
button { | |
border-radius: 0; | |
} | |
button:focus { | |
outline: 1px dotted; | |
outline: 5px auto -webkit-focus-ring-color; | |
} | |
input, | |
button, | |
select, | |
optgroup, | |
textarea { | |
margin: 0; | |
font-family: inherit; | |
font-size: inherit; | |
line-height: inherit; | |
} | |
button, | |
input { | |
overflow: visible; | |
} | |
button, | |
select { | |
text-transform: none; | |
} | |
.text-center { | |
text-align: center !important; | |
} | |
.float-left { | |
float: left !important; | |
} | |
.float-right { | |
float: right !important; | |
} | |
/* END BOOTSTRAP */ | |
body { | |
background-color: #333; | |
} | |
#canvas { | |
border: 1px solid black; | |
margin-top: 20px; | |
} | |
#toolbar { | |
margin: 0 auto; | |
width: 100px; | |
} | |
.dot { | |
display: inline-block; | |
height: 31px; | |
width: 31px; | |
border-radius: 50%; | |
margin: 0 3px; | |
} | |
.color-option-selected { | |
height: 25px; | |
width: 25px; | |
border: 3px solid white; | |
} | |
/* .bg-red { | |
background-color: red; | |
} | |
.bg-blue { | |
background-color: blue; | |
} | |
.bg-yellow { | |
background-color: yellow; | |
} | |
.bg-orange { | |
background-color: orange; | |
} | |
.bg-green { | |
background-color: green; | |
} | |
.bg-purple { | |
background-color: purple; | |
} */ | |
body</script> | |
<script id="jsbin-source-javascript" type="text/javascript">/* CONSTANTS */ | |
var pictureWidth = 60; | |
var pictureHeight = 40; | |
var dotDiameter = 10; | |
var colors = ["red", "blue", "yellow", "orange", "green", "purple", "brown", "black", "white"]; | |
/* STATE */ | |
var selectedColor = colors[0]; | |
var dots = []; | |
var countNewDots = 0; | |
// for (var r = 0; r < pictureHeight; r++) { | |
// var row = []; | |
// for (var c = 0; c < pictureWidth; c++) { | |
// row.push(null); | |
// } | |
// dots.push(row); | |
// } | |
/* CANVAS SETUP */ | |
var canvas = document.getElementById("canvas"); | |
canvas.width = pictureWidth * dotDiameter; | |
canvas.height = pictureHeight * dotDiameter; | |
document.getElementById("toolbar").style.width = (pictureWidth * dotDiameter) + "px"; | |
var ctx = canvas.getContext("2d"); | |
drawDots(); | |
/* DRAWING */ | |
function drawDot(x, y, color) { | |
ctx.beginPath(); | |
ctx.fillStyle = color; | |
ctx.arc(x, y, dotDiameter, 0, 2 * Math.PI); | |
ctx.fill(); | |
} | |
function drawDots() { | |
var oldAlpha = ctx.globalAlpha; | |
ctx.globalAlpha = 1; | |
ctx.fillStyle = "white"; | |
ctx.fillRect(0, 0, canvas.width, canvas.height); | |
ctx.globalAlpha = 0.75; | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
drawDot(dot.c * dotDiameter, dot.r * dotDiameter, dot.color); | |
} | |
// for (var r = 0; r < pictureHeight; r++) { | |
// for (var c = 0; c < pictureWidth; c++) { | |
// var color = dots[r][c]; | |
// if (color) { | |
// drawDot(c * dotDiameter, r * dotDiameter, color); | |
// } | |
// } | |
// } | |
ctx.globalAlpha = oldAlpha; | |
} | |
function getMousePos(canvas, evt) { | |
var rect = canvas.getBoundingClientRect(); | |
return { | |
x: evt.clientX - rect.left, | |
y: evt.clientY - rect.top | |
}; | |
} | |
/* PREVIEW DOT */ | |
canvas.addEventListener("mousemove", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
drawDots(); | |
drawDot(col * dotDiameter, row * dotDiameter, selectedColor); | |
// console.log("[MOVE] x: " + xPos + ", y: " + yPos); | |
}); | |
canvas.addEventListener("mouseleave", function(evt) { | |
drawDots(); | |
}); | |
/* ADD DOT */ | |
canvas.addEventListener("click", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
if (!dotAtPosition(row, col)) { | |
dots.push({ | |
c: col, | |
r: row, | |
color: selectedColor | |
}); | |
countNewDots++; | |
undoButton.removeAttribute("disabled"); | |
drawDots(); | |
} | |
// console.log("[CLICK] x: " + xPos + ", y: " + yPos); | |
}); | |
function dotAtPosition(row, col) { | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
if (dot.r === row && dot.c === col) { | |
return dot; | |
} | |
} | |
return null; | |
} | |
/* UNDO BUTTON */ | |
var undoButton = document.getElementById("undo"); | |
undoButton.addEventListener("click", function() { | |
if (countNewDots > 0) { | |
dots.pop(); | |
if (--countNewDots === 0) { | |
console.log("disabling undo button"); | |
undoButton.setAttribute("disabled", ""); | |
} | |
} | |
drawDots(); | |
}); | |
/* COLOR SELECTOR */ | |
var SELECTED_CLASS = "color-option-selected"; | |
function selectColorOption(color) { | |
return function() { | |
selectedColor = color; | |
var selectedColorOptions = document.getElementsByClassName(SELECTED_CLASS); | |
for (var i = 0; i < selectedColorOptions.length; i++) { | |
selectedColorOptions[i].classList.remove(SELECTED_CLASS); | |
} | |
document.getElementById("option-" + color).classList.add(SELECTED_CLASS); | |
}; | |
} | |
var colorSelector = document.getElementById("color-selector"); | |
for (var i = 0; i < colors.length; i++) { | |
var color = colors[i]; | |
var colorOption = document.createElement("span"); | |
colorOption.id = "option-" + color; | |
colorOption.classList.add("dot"); | |
if (color === selectedColor) { | |
colorOption.classList.add(SELECTED_CLASS); | |
} | |
colorOption.style.backgroundColor = color; | |
colorOption.addEventListener("click", selectColorOption(color)); | |
colorSelector.appendChild(colorOption); | |
}</script></body> | |
</html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Source: Bootstrap 4.2.1 */ | |
/* BEGIN BOOTSTRAP */ | |
body { | |
margin: 0; | |
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"; | |
font-size: 1rem; | |
font-weight: 400; | |
line-height: 1.5; | |
color: #212529; | |
text-align: left; | |
background-color: #fff; | |
} | |
.container { | |
/* width: 100%; */ | |
padding-right: 15px; | |
padding-left: 15px; | |
margin-right: auto; | |
margin-left: auto; | |
} | |
.btn { | |
display: inline-block; | |
font-weight: 400; | |
color: #212529; | |
text-align: center; | |
vertical-align: middle; | |
-webkit-user-select: none; | |
-moz-user-select: none; | |
-ms-user-select: none; | |
user-select: none; | |
background-color: transparent; | |
border: 1px solid transparent; | |
padding: 0.375rem 0.75rem; | |
font-size: 1rem; | |
line-height: 1.5; | |
border-radius: 0.25rem; | |
transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out; | |
} | |
.btn-light { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
.btn-light:hover { | |
color: #212529; | |
background-color: #e2e6ea; | |
border-color: #dae0e5; | |
} | |
.btn-light:focus, .btn-light.focus { | |
box-shadow: 0 0 0 0.2rem rgba(216, 217, 219, 0.5); | |
} | |
.btn-light.disabled, .btn-light:disabled { | |
color: #212529; | |
background-color: #f8f9fa; | |
border-color: #f8f9fa; | |
} | |
button { | |
border-radius: 0; | |
} | |
button:focus { | |
outline: 1px dotted; | |
outline: 5px auto -webkit-focus-ring-color; | |
} | |
input, | |
button, | |
select, | |
optgroup, | |
textarea { | |
margin: 0; | |
font-family: inherit; | |
font-size: inherit; | |
line-height: inherit; | |
} | |
button, | |
input { | |
overflow: visible; | |
} | |
button, | |
select { | |
text-transform: none; | |
} | |
.text-center { | |
text-align: center !important; | |
} | |
.float-left { | |
float: left !important; | |
} | |
.float-right { | |
float: right !important; | |
} | |
/* END BOOTSTRAP */ | |
body { | |
background-color: #333; | |
} | |
#canvas { | |
border: 1px solid black; | |
margin-top: 20px; | |
} | |
#toolbar { | |
margin: 0 auto; | |
width: 100px; | |
} | |
.dot { | |
display: inline-block; | |
height: 31px; | |
width: 31px; | |
border-radius: 50%; | |
margin: 0 3px; | |
} | |
.color-option-selected { | |
height: 25px; | |
width: 25px; | |
border: 3px solid white; | |
} | |
/* .bg-red { | |
background-color: red; | |
} | |
.bg-blue { | |
background-color: blue; | |
} | |
.bg-yellow { | |
background-color: yellow; | |
} | |
.bg-orange { | |
background-color: orange; | |
} | |
.bg-green { | |
background-color: green; | |
} | |
.bg-purple { | |
background-color: purple; | |
} */ | |
body |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* CONSTANTS */ | |
var pictureWidth = 60; | |
var pictureHeight = 40; | |
var dotDiameter = 10; | |
var colors = ["red", "blue", "yellow", "orange", "green", "purple", "brown", "black", "white"]; | |
/* STATE */ | |
var selectedColor = colors[0]; | |
var dots = []; | |
var countNewDots = 0; | |
// for (var r = 0; r < pictureHeight; r++) { | |
// var row = []; | |
// for (var c = 0; c < pictureWidth; c++) { | |
// row.push(null); | |
// } | |
// dots.push(row); | |
// } | |
/* CANVAS SETUP */ | |
var canvas = document.getElementById("canvas"); | |
canvas.width = pictureWidth * dotDiameter; | |
canvas.height = pictureHeight * dotDiameter; | |
document.getElementById("toolbar").style.width = (pictureWidth * dotDiameter) + "px"; | |
var ctx = canvas.getContext("2d"); | |
drawDots(); | |
/* DRAWING */ | |
function drawDot(x, y, color) { | |
ctx.beginPath(); | |
ctx.fillStyle = color; | |
ctx.arc(x, y, dotDiameter, 0, 2 * Math.PI); | |
ctx.fill(); | |
} | |
function drawDots() { | |
var oldAlpha = ctx.globalAlpha; | |
ctx.globalAlpha = 1; | |
ctx.fillStyle = "white"; | |
ctx.fillRect(0, 0, canvas.width, canvas.height); | |
ctx.globalAlpha = 0.75; | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
drawDot(dot.c * dotDiameter, dot.r * dotDiameter, dot.color); | |
} | |
// for (var r = 0; r < pictureHeight; r++) { | |
// for (var c = 0; c < pictureWidth; c++) { | |
// var color = dots[r][c]; | |
// if (color) { | |
// drawDot(c * dotDiameter, r * dotDiameter, color); | |
// } | |
// } | |
// } | |
ctx.globalAlpha = oldAlpha; | |
} | |
function getMousePos(canvas, evt) { | |
var rect = canvas.getBoundingClientRect(); | |
return { | |
x: evt.clientX - rect.left, | |
y: evt.clientY - rect.top | |
}; | |
} | |
/* PREVIEW DOT */ | |
canvas.addEventListener("mousemove", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
drawDots(); | |
drawDot(col * dotDiameter, row * dotDiameter, selectedColor); | |
// console.log("[MOVE] x: " + xPos + ", y: " + yPos); | |
}); | |
canvas.addEventListener("mouseleave", function(evt) { | |
drawDots(); | |
}); | |
/* ADD DOT */ | |
canvas.addEventListener("click", function(evt) { | |
var mousePos = getMousePos(canvas, evt); | |
var col = Math.floor(mousePos.x / dotDiameter); | |
var row = Math.floor(mousePos.y / dotDiameter); | |
if (!dotAtPosition(row, col)) { | |
dots.push({ | |
c: col, | |
r: row, | |
color: selectedColor | |
}); | |
countNewDots++; | |
undoButton.removeAttribute("disabled"); | |
drawDots(); | |
} | |
// console.log("[CLICK] x: " + xPos + ", y: " + yPos); | |
}); | |
function dotAtPosition(row, col) { | |
for (var i = 0; i < dots.length; i++) { | |
var dot = dots[i]; | |
if (dot.r === row && dot.c === col) { | |
return dot; | |
} | |
} | |
return null; | |
} | |
/* UNDO BUTTON */ | |
var undoButton = document.getElementById("undo"); | |
undoButton.addEventListener("click", function() { | |
if (countNewDots > 0) { | |
dots.pop(); | |
if (--countNewDots === 0) { | |
console.log("disabling undo button"); | |
undoButton.setAttribute("disabled", ""); | |
} | |
} | |
drawDots(); | |
}); | |
/* COLOR SELECTOR */ | |
var SELECTED_CLASS = "color-option-selected"; | |
function selectColorOption(color) { | |
return function() { | |
selectedColor = color; | |
var selectedColorOptions = document.getElementsByClassName(SELECTED_CLASS); | |
for (var i = 0; i < selectedColorOptions.length; i++) { | |
selectedColorOptions[i].classList.remove(SELECTED_CLASS); | |
} | |
document.getElementById("option-" + color).classList.add(SELECTED_CLASS); | |
}; | |
} | |
var colorSelector = document.getElementById("color-selector"); | |
for (var i = 0; i < colors.length; i++) { | |
var color = colors[i]; | |
var colorOption = document.createElement("span"); | |
colorOption.id = "option-" + color; | |
colorOption.classList.add("dot"); | |
if (color === selectedColor) { | |
colorOption.classList.add(SELECTED_CLASS); | |
} | |
colorOption.style.backgroundColor = color; | |
colorOption.addEventListener("click", selectColorOption(color)); | |
colorSelector.appendChild(colorOption); | |
} |
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