leader-line划线,z-index较高的问题?调用position()后,失去圆角的问题?
页面采用flex上下布局, 上面高度固定,下面通过 flex: 1; 自动撑开, 然后 overflow-y: auto; 超出显示滚动条;
需要通过 leader-line 划线的内容主要在下面部分, 所以滚动后需要通过 position() 来更新线条位置,现在遇到如下问题:
- 滚动到最下面,划线会覆盖在上面的内容;
- 滚动页面后,折线
grid的圆角就失效了,该如何处理呢?
问题一:
问题二:
demo 地址: https://codepen.io/qingyun1029/pen/JjwxrmE
链接打不开,直接复制如下内容,保持为 html 文件即可:
<!DOCTYPE html><html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
html, body{
height: 100%;
overflow: hidden;
margin: 0;
border: 0;
padding: 0;
}
.wrapper{
height: 100%;
overflow-y: hidden;
display: flex;
flex-direction: column;
}
.top{
height: 200px;
background: #e3e3e3;
}
.content{
height: 0;
flex: 1;
overflow-y: auto;
padding: 0 50px;
}
.node-warpper{
background: rgba(255, 0, 0, 0.172);
margin: 20px;
}
.node{
border: 1px solid blue;
height: 30px;
line-height: 30px;
margin: 10px;
}
</style>
</head>
<body>
<div class="wrapper">
<div class="top">
top 区域
</div>
<div class="content" id="content">
<div class="node-warpper" style="width: 200px;height: 100px;">
<div class="node" id="node-1">
<div>node-1</div>
</div>
</div>
<div class="node-warpper" style="width: 200px;height: 400px;">
<div class="node" id="node-2">
<div>node-2</div>
</div>
</div>
<div class="node-warpper" style="width: 200px;height: 200px;">
<div class="node" id="node-3">
<div>node-3</div>
</div>
</div>
<div class="node-warpper" style="width: 200px;height: 300px;">
<div class="node" id="node-4">
<div>node-4</div>
</div>
</div>
</div>
</div>
<script src="https://files.cnblogs.com/files/mggahui/leader-line.min.js"></script>
<script>
let node1 = document.getElementById('node-1')
let node2 = document.getElementById('node-2')
let node3 = document.getElementById('node-3')
let node4 = document.getElementById('node-4')
let line1 = new LeaderLine({ start: node1, end: node2, path: 'grid', startSocket: 'right', endSocket: 'right', color: 'blue', size: 5 })
let line2 = new LeaderLine({ start: node2, end: node3, path: 'grid', startSocket: 'left', endSocket: 'left', color: 'blue', size: 5 })
let line3 = new LeaderLine({ start: node3, end: node4, path: 'grid', startSocket: 'right', endSocket: 'right', color: 'blue', size: 5 })
let showEffectName = 'draw'
// 动画参数
let animOptions = {
duration: 1000, //持续时长
timing: 'ease-in' // 动画函数
}
line1.show(showEffectName, animOptions)
line2.show(showEffectName, animOptions)
line3.show(showEffectName, animOptions)
let scrollView = document.getElementById('content')
scrollView.addEventListener('scroll',function(){
//滚动div,更新线条位置
line1.position()
line2.position()
line3.position()
//将折线替换成圆角
let elmsPath1 = document.getElementById(`leader-line-${idx + 1}-line-path`);
elmsPath1.setAttribute('d', addArc(elmsPath1.getAttribute('d'), 10));
let elmsPath2 = document.getElementById(`leader-line-${idx + 1}-line-path`);
elmsPath2.setAttribute('d', addArc(elmsPath2.getAttribute('d'), 10));
let elmsPath3 = document.getElementById(`leader-line-${idx + 1}-line-path`);
elmsPath3.setAttribute('d', addArc(elmsPath3.getAttribute('d'), 10));
}, false);
//将折线替换成圆角
var elmsPath = document.getElementById('leader-line-1-line-path');
elmsPath.setAttribute('d', addArc(elmsPath.getAttribute('d'), 10));
var elmsPath2 = document.getElementById('leader-line-2-line-path');
elmsPath2.setAttribute('d', addArc(elmsPath2.getAttribute('d'), 10));
var elmsPath3 = document.getElementById('leader-line-3-line-path');
elmsPath3.setAttribute('d', addArc(elmsPath3.getAttribute('d'), 10));
//替换成圆角方法
function addArc(pathData, radius) {
var reL = /^L ?([\d.\-+]+) ([\d.\-+]+) ?/,
newPathData, curXY, curDir, newXY, newDir,
sweepFlag, arcXY, arcStartXY;
function getDir(xy1, xy2) {
if (xy1.x === xy2.x) {
return xy1.y < xy2.y ? 'd' : 'u';
} else if (xy1.y === xy2.y) {
return xy1.x < xy2.x ? 'r' : 'l';
}
throw new Error('Invalid data');
}
function captureXY(s, x, y) {
newXY = {x: +x, y: +y};
return '';
}
function offsetXY(xy, dir, offsetLen, toBack) {
return {
x: xy.x + (dir === 'l' ? -offsetLen : dir === 'r' ? offsetLen : 0) * (toBack ? -1 : 1),
y: xy.y + (dir === 'u' ? -offsetLen : dir === 'd' ? offsetLen : 0) * (toBack ? -1 : 1)
};
}
pathData = pathData.trim().replace(/,/g, ' ').replace(/\s+/g, ' ')
.replace(/^M ?([\d.\-+]+) ([\d.\-+]+) ?/, function(s, x, y) {
curXY = {x: +x, y: +y};
return '';
});
if (!curXY) { throw new Error('Invalid data'); }
newPathData = 'M' + curXY.x + ' ' + curXY.y;
while (pathData) {
newXY = null;
pathData = pathData.replace(reL, captureXY);
if (!newXY) { throw new Error('Invalid data'); }
newDir = getDir(curXY, newXY);
if (curDir) {
arcStartXY = offsetXY(curXY, curDir, radius, true);
arcXY = offsetXY(curXY, newDir, radius);
sweepFlag =
curDir === 'l' && newDir === 'u' ? '1' :
curDir === 'l' && newDir === 'd' ? '0' :
curDir === 'r' && newDir === 'u' ? '0' :
curDir === 'r' && newDir === 'd' ? '1' :
curDir === 'u' && newDir === 'l' ? '0' :
curDir === 'u' && newDir === 'r' ? '1' :
curDir === 'd' && newDir === 'l' ? '1' :
curDir === 'd' && newDir === 'r' ? '0' :
null;
if (!sweepFlag) { throw new Error('Invalid data'); }
newPathData += 'L' + arcStartXY.x + ' ' + arcStartXY.y +
'A ' + radius + ' ' + radius + ' 0 0 ' + sweepFlag + ' ' + arcXY.x + ' ' + arcXY.y;
}
curXY = newXY;
curDir = newDir;
}
newPathData += 'L' + curXY.x + ' ' + curXY.y;
debugger
return newPathData;
}
</script>
</body>
</html>
回答：
1、你的svg都使用了absolute定位，且在wrapper元素下面，所以默认是覆盖整个wrapper的，你想让top在svg上面，需要给top一个更高的z-indexposition: relative;z-index: 1;
2、你在scroll里面执行了将折线替换成圆角的操作，但是里面的元素获取都是通过leader-line-${idx + 1}-line-path获取的，我看你的idx并没有定义，所以这步是失败的。另外你的elmsPath1、elmsPath2、elmsPath3都是通过这个选择器获取的，最终获取的都是同一个。你scroll外面有同样的代码块，可以封装成一个公共函数，在scroll里面执行这个公共函数就行。
以上是 leader-line划线,z-index较高的问题?调用position()后,失去圆角的问题? 的全部内容， 来源链接： utcz.com/p/935014.html
