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| const tools = {
$: function (selector) {
let elems = document.querySelectorAll(selector);
if (elems.length === 1) {
return elems[0];
}
return elems;
},
randomIntRange: function (min, max) {
return parseInt(Math.random() * (max - min) + min, 10);
},
randomColor: function () {
return (
"rgb(" +
randomIntRange(0, 255) +
", " +
randomIntRange(0, 255) +
", " +
randomIntRange(0, 255) +
")"
);
},
compareGrid(g1, g2) {
if (g1.dataset.col === g2.dataset.col && g1.dataset.row === g2.dataset.row) {
return true;
} else {
return false;
}
},
};
Object.assign(window, tools);
var coloredGrids = [];
window.onload = function () {
$("#init-submit").onclick = function (event) {
event.preventDefault();
let rows = $("input[name=rows]").value;
let cols = $("input[name=cols]").value;
if (rows && cols) {
$(".init").style.display = "none";
initGrids(rows, cols);
} else {
alert("请输入正确的数字");
}
};
};
function initGrids(rows, cols) {
let table = document.createElement("table");
table.className = "sketchpad";
document.addEventListener("keyup", handleKeyPress);
document.oncontextmenu = function (event) {
event.preventDefault();
};
table.addEventListener("mousedown", handleClick, false);
for (let i = 0; i < rows; i++) {
let tr = document.createElement("tr");
tr.className = "sketchpad-grid-row";
for (let j = 0; j < cols; j++) {
let td = document.createElement("td");
td.className = "sketchpad-grid-col";
td.setAttribute("data-row", i);
td.setAttribute("data-col", j);
tr.appendChild(td);
}
table.appendChild(tr);
}
$(".stage").appendChild(table);
}
function handleKeyPress(event) {
if (event.keyCode !== 67) {
return;
}
if (coloredGrids.length) {
coloredGrids.forEach(function (grid, index) {
grid.style.backgroundColor = randomColor();
});
}
}
function handleClick(event) {
if (event.button === 0) {
event.target.style.backgroundColor = randomColor();
coloredGrids.push(event.target);
}
if (event.button === 2) {
event.target.style.backgroundColor = "";
let index = coloredGrids.indexOf(event.target);
coloredGrids.splice(index, 1);
}
let colorIslands = countColorIslands();
let message = document.createElement("p");
message.className = "message";
message.innerHTML = "当前颜色岛数量为: <span>" + colorIslands + "<span>";
$(".container").appendChild(message);
setTimeout(function() {
$(".container").removeChild(message);
}, 1000);
}
function countColorIslands() {
let temp = coloredGrids.slice(0);
let visited = Array(temp.length).fill(false);
let result = [];
function dfs(grid, index) {
visited[index] = true;
getColoredNeighbors(grid).forEach((i) => {
if (!visited[i]) dfs(coloredGrids[i], i);
});
};
temp.forEach((grid, index) => {
if (!visited[index]) {
result.push(grid);
dfs(grid, index);
}
});
return result.length;
}
function getColoredNeighbors(elem) {
let x = +elem.dataset.col;
let y = +elem.dataset.row;
let neighbors = [];
for (let i = (x - 1 < 0 ? 0 : x - 1); i <= x + 1; i++) {
for (let j = (y - 1 < 0 ? 0 : y - 1); j <= y + 1; j++) {
if (!(i === x && j === y) && (i === x || j === y)) {
if ($("td[data-col='" + i + "'][data-row='" + j + "']").style.backgroundColor !== "") {
coloredGrids.forEach((grid, index) => {
if (compareGrid($("td[data-col='" + i + "'][data-row='" + j + "']"), grid)) {
neighbors.push(index);
}
});
}
}
}
}
return neighbors;
}
|
