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bar.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>我的进度条</title>
<style type="text/css">
h1{
width: 600px;
margin: 10px auto;
text-align: center;
}
#d1 {
width:600px;
margin: 10px auto;
position: relative;
}
#toolip {
display: none;
position: absolute;
border: 1px solid #000;
border-radius: 3px;
background-color: #fff;
padding: 3px;
}
</style>
</head>
<body>
<h1>我的进度条</h1>
<div id="d1">
<p id="toolip"></p>
<canvas id="c1" width="600" height="1700"></canvas>
</div>
<script type="text/javascript" charset="utf-8">
window.onload = function () {
var div = document.getElementById("d1");
div.addEventListener("mousemove", mmove, true);
div.addEventListener("mouseenter", menter, true);
div.addEventListener("mouseleave", mleave, true);
var can = document.getElementById("c1");
var ctx = can.getContext("2d");
var toolip = document.getElementById("toolip");
var i, j;
var size = 5, margin = 1;
var cols = Math.floor(can.width / (size + margin));
var pos = {x:0, y:0};
var msperday = 24 * 60 * 60 * 1000;
var begin = Date.parse("Jan 01, 1990");
var birth = Date.parse("Mar 22, 1991");
var birthIdx = (birth - begin) / msperday;
var now = Date.now();
var nowIdx = Math.floor((now - begin) / msperday);
var nowPos, nowColor = 'red';
var liveYear = 70;
var death = birth + (liveYear * 365 + 18) * msperday;
var deathIdx = (death - begin) / msperday;
var focusedIdx = 0;
function drawBlock(k) {
if (begin + k * msperday < birth) {
ctx.fillStyle = '#eee'; //grey
} else if (begin + k * msperday < now - msperday) {
ctx.fillStyle = '#ff7575'; //red
} else if (begin + k * msperday < now) {
ctx.fillStyle = '#ff7575'; //red
nowPos = {x:pos.x, y:pos.y};
}else if (begin + k * msperday <= death) {
ctx.fillStyle = '#00EC00'; //green
} else {
ctx.fillStyle = '#eee'; //grey
}
ctx.fillRect(pos.x, pos.y, size, size);
}
function movePos() {
if (pos.x + size * 2 + margin <= can.width){
pos.x += size + margin;
} else {
pos.x = 0;
pos.y = pos.y + size + margin;
}
}
function menter() {
toolip.style.display = 'block';
}
function mleave() {
toolip.style.display = 'none';
}
function mmove(e) {
var rect = can.getBoundingClientRect();
var mousePos = {
x: e.clientX - rect.left,
y: e.clientY - rect.top
};
var idx = getIndex(mousePos);
if (idx != focusedIdx) {
focusedIdx = idx;
var date = new Date(begin + idx * msperday);
toolip.style.top = (mousePos.y - 50) + 'px';
toolip.style.left = mousePos.x + 'px';
if (idx == birthIdx) {
toolip.innerHTML = '我的出生日 ' + date.toLocaleDateString();
} else if (idx == nowIdx) {
toolip.innerHTML = '今天 ' + date.toLocaleDateString();
} else if (idx == deathIdx) {
toolip.innerHTML = liveYear + '大寿！ ' + date.toLocaleDateString();
} else {
toolip.innerHTML = date.toLocaleDateString();
}
}
}
function getIndex(pos) {
var y = Math.floor(pos.y / (size + margin));
var x = Math.floor(pos.x / (size + margin));
return y * cols + x;
}
function beep() {
if (nowColor == 'red') {
nowColor = 'Red';
ctx.fillStyle = '#ff5555';
} else {
nowColor = 'red';
ctx.fillStyle = '#ff7575';
}
ctx.fillRect(nowPos.x, nowPos.y, size, size);
setTimeout(beep, 500);
}
setTimeout(beep, 500);
for (i = 0; ; i++){
drawBlock(i);
movePos();
if (pos.y + size + margin > can.height) {
return;
}
}
}
</script>
</body>
</html>