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script.js
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script.js
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/* jshint esversion: 6 */
const colorPalette = document.getElementById('color-palette');
const randomColorsButton = document.getElementById('button-random-color');
const clearBoardButton = document.getElementById('clear-board');
const changeBoardSizeButton = document.getElementById('generate-board');
const inputChangeSize = document.getElementById('board-size');
const pixelBoard = document.getElementById('pixel-board');
let selectedColor;
const numberOfBlocks = 4;
let numberOfPixels = 25;
// Selecionar
function selectColors(selecionado) {
const antigoSelecionado = document.querySelector('.selected');
if (antigoSelecionado) antigoSelecionado.classList.remove('selected');
selecionado.classList.add('selected');
selectedColor = selecionado.style.backgroundColor;
}
// Cria bloco de cor dentro da paleta
// Gera um numero aleatório para usar no RGB
function aleatoryNumber(maxValue) {
return Math.floor(Math.random() * maxValue);
}
function clearPalette(palette) {
palette.innerHTML = '';
}
function createBlockColor(existeLocalPalette = false, localPaletteColor = '') { // Cria as cores
const divElement = document.createElement('div');
divElement.className = 'color';
let cor;
if (existeLocalPalette) {
cor = localPaletteColor;
} else {
cor = `rgb(${aleatoryNumber(254)}, ${aleatoryNumber(254)}, ${aleatoryNumber(254)})`;
}
divElement.style.backgroundColor = cor;
divElement.addEventListener('click', (e) => selectColors(e.target));
return divElement;
}
function fillPalette(quantityOfBlocks, palette) {
const cores = [];
for (let index = 1; index <= quantityOfBlocks; index += 1) {
let block;
do { // Evita cores repetidas
block = createBlockColor();
} while (cores.includes(block.style.backgroundColor));
if (index === 1) block.style.backgroundColor = 'black';
cores.push(block.style.backgroundColor);
palette.appendChild(block);
}
localStorage.setItem('colorPalette', JSON.stringify(cores));
}
// Se tiver cores no localStorage
function fillLocalPalette(palette, localPalette) {
for (let index = 0; index < localPalette.length; index += 1) {
const block = createBlockColor(true, localPalette[index]);
palette.appendChild(block);
}
}
// Quadro de pixels
function createPixel() {
const pixel = document.createElement('div');
pixel.className = 'pixel';
pixel.addEventListener('click', (e) => {
// const cor = document.querySelector('.selected').style.backgroundColor;
e.target.style.backgroundColor = selectedColor;
const pixelOrder = e.target.style.order;
if (typeof (localStorage.pixelBoard) !== 'undefined') {
const objPixelBoard = JSON.parse(localStorage.pixelBoard);
objPixelBoard[pixelOrder] = selectedColor;
localStorage.pixelBoard = JSON.stringify(objPixelBoard);
} else {
const newItem = {};
newItem[pixelOrder] = selectedColor;
localStorage.setItem('pixelBoard', JSON.stringify(newItem));
}
});
return pixel;
}
function savedColors(index, pixel) {
const funcPixel = pixel;
const cor = JSON.parse(localStorage.pixelBoard)[index];
if (typeof cor !== 'undefined') {
funcPixel.style.backgroundColor = cor;
}
return funcPixel;
}
function generateBoard(pixelQuantity, board = pixelBoard) {
for (let index = 0; index < pixelQuantity; index += 1) {
let pixel = createPixel();
pixel.style.order = index;
if (typeof (localStorage.pixelBoard) !== 'undefined') {
pixel = savedColors(index, pixel);
}
board.appendChild(pixel);
}
}
// Botão de gerar cores aleatórias
randomColorsButton.addEventListener('click', () => {
clearPalette(colorPalette);
fillPalette(numberOfBlocks, colorPalette);
});
// Botão de limpar board
const pixels = pixelBoard.children;
clearBoardButton.addEventListener('click', () => {
for (let index = 0; index < pixels.length; index += 1) {
pixels[index].style.backgroundColor = 'white';
if (localStorage.pixelBoard) {
localStorage.removeItem('pixelBoard');
}
}
});
// muda a quantidade de pixel
function changeColumnBoard(board, valor) {
let columnValue = valor;
if (columnValue < 5) {
columnValue = 5;
} else if (columnValue > 50) {
columnValue = 50;
}
board.setAttribute('style',
`grid-template-columns: repeat(${columnValue}, 40px)`);
}
function clearBoard() {
pixelBoard.innerHTML = '';
}
function changeBoard(board, numOfPixels) {
clearBoard();
changeColumnBoard(board, inputChangeSize.value);
generateBoard(numOfPixels, board);
const obj = {};
obj[inputChangeSize.value] = numberOfPixels;
localStorage.setItem('boardSize', JSON.stringify(obj));
}
changeBoardSizeButton.addEventListener('click', () => {
const inputValue = inputChangeSize.value;
if (inputValue === '') {
alert('Board inválido!');
return;
}
if (inputValue < 1) return;
numberOfPixels = inputValue * inputValue;
if (inputValue < 5) {
inputChangeSize.value = 5;
numberOfPixels = inputChangeSize.value * inputChangeSize.value;
changeBoard(pixelBoard, 25);
} else if (inputValue > 50) {
changeBoard(pixelBoard, 2500);
} else {
changeBoard(pixelBoard, numberOfPixels);
}
});
window.onload = () => {
if (typeof (localStorage.colorPalette) !== 'undefined') {
const localPalette = JSON.parse(localStorage.colorPalette);
fillLocalPalette(colorPalette, localPalette);
} else {
fillPalette(numberOfBlocks, colorPalette);
}
const blackBlock = document.querySelector('.color');
blackBlock.classList.add('selected');
selectedColor = blackBlock.style.backgroundColor;
if (localStorage.boardSize) {
numberOfPixels = JSON.parse(localStorage.boardSize);
const valor = Object.keys(numberOfPixels)[0];
changeColumnBoard(pixelBoard, valor);
numberOfPixels = numberOfPixels[Object.keys(numberOfPixels)[0]];
}
generateBoard(numberOfPixels, pixelBoard);
};