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app.js
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app.js
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const canvas = document.getElementById("jsCanvas");
const ctx = canvas.getContext("2d");
const colors = document.getElementsByClassName("jsColor");
const range = document.getElementById("jsRange");
const mode = document.getElementById("jsMode");
const saveBtn = document.getElementById("jsSave");
const INITIAL_COLOR = "#2c2c2c"
const CANVAS_SIZE = 700;
canvas.width = CANVAS_SIZE;
canvas.height = CANVAS_SIZE;
ctx.fillStyle = "white";
ctx.fillRect(0, 0, CANVAS_SIZE, CANVAS_SIZE);
ctx.strokeStyle = INITIAL_COLOR;
ctx.fillStyle = INITIAL_COLOR;
ctx.lineWidth = 2.5;
let painting = false;
let filling = false;
function stopPainting(){
painting = false;
}
function startPainting(){
painting = true;
}
function onMouseMove(event) {
const x = event.offsetX;
const y = event.offsetY;
if(!painting){
ctx.beginPath();
ctx.moveTo(x, y);
} else {
ctx.lineTo(x, y);
ctx.stroke();
}
}
function handleColorClick(event) {
const color = event.target.style.backgroundColor;
ctx.strokeStyle = color;
ctx.fillStyle = color;
}
function handleRangeChange(event) {
const size = event.target.value;
ctx.lineWidth = size;
}
function handleModeClick() {
if(filling === true) {
filling = false;
mode.innerText = "Fill"
} else {
filling = true;
mode.innerText = "Paint"
}
}
function handleCanvasClick() {
if(filling){
ctx.fillRect(0, 0, CANVAS_SIZE, CANVAS_SIZE);
}
}
function handleCM(event) {
event.preventDefault();
}
function handleSaveClick(){
const image = canvas.toDataURL();
const link = document.createElement("a");
link.href = image;
link.download = "PaintJS[๐จ]";
link.click();
}
if(canvas) {
canvas.addEventListener("mousemove", onMouseMove);
canvas.addEventListener("mousedown", startPainting);
canvas.addEventListener("mouseup", stopPainting);
canvas.addEventListener("mouseleave", stopPainting);
canvas.addEventListener("click", handleCanvasClick);
canvas.addEventListener("contextmenu", handleCM);
}
Array.from(colors).forEach(color =>
color.addEventListener("click", handleColorClick)
);
if(range){
range.addEventListener("input", handleRangeChange);
};
if(mode){
mode.addEventListener("click", handleModeClick);
};
if(saveBtn) {
saveBtn.addEventListener("click", handleSaveClick);
}