const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
canvas.width = innerWidth;
canvas.height = innerHeight;
drag = false;
var radius = document.getElementById("range-input").value;
const circleEndPath = Math.PI * 2;
ctx.lineCap = "round";
var undo = [], redo = [];
const colors = ["#000000", "#1f2652", "#0e113a", "#ee3466", "#c42754", "#00b0ad", "#018790", "#fff79c", "#fed883",
"#523b58", "#362337", "#f8c09d", "#ef937e", "#0e3441", "#002337", "#1abfdf", "#0094bc", "#d8df20",
"#8ec63f", "#ffffff", "#b4c8d3"];
init();
function init() {
var pallete = document.querySelector(".pallete");
var color;
for (let i = 0; i < colors.length; i++) {
color = document.createElement("span");
color.classList.add("color");
if (i === 0) {
color.classList.add("active");
}
color.style.background = colors[i];
pallete.append(color);
color.addEventListener("click", (e) => {
document.querySelectorAll(".color").forEach((el) => {
el.classList.remove("active");
});
e.target.classList.add("active");
});
}
}
function save_state(canvas, list, keep) {
undo.push(canvas.toDataURL());
}
function ctx_undo(canvas, ctx) {
if (undo.length) {
var line = undo.pop();
var round = undo.pop();
var img = document.createElement("img");
img.src = line;
img.onload = function () {
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(img, 0, 0, canvas.width, canvas.height, 0, 0, canvas.width, canvas.height);
};
img.src = round;
}
}
function draw(e) {
if (drag) {
ctx.strokeStyle = ctx.fillStyle = document.querySelector(".color.active").style.background;
ctx.lineWidth = radius * 2;
ctx.beginPath();
ctx.arc(e.clientX, e.clientY, radius, 0, circleEndPath);
ctx.fill();
ctx.beginPath();
ctx.moveTo(e.clientX, e.clientY);
save_state(canvas);
}
}
function down(e) {
drag = true;
save_state(canvas);
ctx.beginPath();
draw(e);
}
function move(e) {
if (drag) {
ctx.lineTo(e.clientX, e.clientY);
ctx.stroke();
}
}
function stop() {
drag = false;
}
document.getElementById("range-input").addEventListener("change", (e) => {
radius = e.target.value;
});
document.querySelector(".tabs").addEventListener("click", (e) => {
document.querySelectorAll(".tab").forEach((t) => {
t.classList.remove("active");
});
e.target.classList.add("active");
var el = document.querySelector("." + e.target.getAttribute("data-tab"));
document.querySelector(".tab-content-holder").style.left = "-" + el.offsetLeft + "px";
});
document.querySelector(".undo").addEventListener("click", (el) => {
ctx_undo(canvas, ctx);
});
document.querySelector(".save_btn").addEventListener("click", function (e) {
var a = document.createElement("a")
a.href = canvas.toDataURL();
a.download = "img.png";
a.click()
});
canvas.addEventListener("mousemove", move);
canvas.addEventListener("mouseup", stop);
canvas.addEventListener("mousedown", down);
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