1、功能页面
2、需求描述
- 板块调整大小操作
要求1：3个板块上下可自由拉伸，当拉伸时，相邻的板块自动对应缩小。例如：第一个板块向下拉伸时，相邻的第二个板块自动缩小；第二个板块若向上拉伸时，相邻第一个板块自动缩小，若向下拉伸时，第三个板块自动缩小。
要求2：每个板块右上角放大窗口按钮点击后，可在当前页面中对该窗口进行放大，在放大的窗口中，可点击右上角缩小窗口按钮进行缩小。
3、实现代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Title</title>
<style>
body,
html {
width: 100%;
height: 100%;
margin: 0;
}
.nav{
width: 100%;
height: 100%;
}
#container1 {
/* width: 200px; */
/* height: 200px; */
width: 100%;
height: 50%;
/* padding: 15px; */
margin: 0px 0 0px 0;
border: #00cdcd 2px solid;
box-sizing: border-box;
-webkit-user-select: none;
-moz-user-select: none;
-o-user-select: none;
user-select: none;
}
#container2{
/* width: 200px;
height: 200px; */
width: 100%;
height: calc(25% - 15px);
/* padding: 15px; */
margin: 15px 0 15px 0;
border: #00cdcd 2px solid;
box-sizing: border-box;
-webkit-user-select: none;
-moz-user-select: none;
-o-user-select: none;
user-select: none;
}
#container3{
/* width: 200px;
height: 200px; */
width: 100%;
/* height: 25%; */
height: calc(25% - 15px);
/* padding: 15px; */
margin: 0px 0 0px 0;
border: #00cdcd 2px solid;
box-sizing: border-box;
-webkit-user-select: none;
-moz-user-select: none;
-o-user-select: none;
user-select: none;
}
.item1 {
cursor: default;
width: 100%;
height: 100%;
background: #757575;
}
.item2 {
cursor: default;
width: 100%;
height: 100%;
background: #757575;
}
.item3 {
cursor: default;
width: 100%;
height: 100%;
background: #757575;
}
</style>
</head>
<body id="body">
<div class="nav">
<div id="container1">
<div class="item1"></div>
</div>
<div id="container2">
<div class="item2"></div>
</div>
<div id="container3">
<div class="item3"></div>
</div>
</div>
<script>
//需要调整尺寸的div
let container1 = document.getElementById('container1')
let container2 = document.getElementById('container2')
let container3 = document.getElementById('container3')
// body监听移动事件
document.getElementById('body').addEventListener('mousemove', move)//鼠标移动事件
// 鼠标按下事件
container1.addEventListener('mousedown', down1)//鼠标按下
// +++
container2.addEventListener('mousedown', down2)//鼠标按下
container3.addEventListener('mousedown', down3)//鼠标按下
// +++
// 鼠标松开事件
document.getElementById('body').addEventListener('mouseup', up)//鼠标松开
// 是否开启尺寸修改
let resizeable = false
let numInt;
// 鼠标按下时的坐标，并在修改尺寸时保存上一个鼠标的位置
let clientX, clientY
// div可修改的最小宽高
// let minW = 8, minH = 8
let minW = 15, minH = 15
// 鼠标按下时的位置，使用n、s、w、e表示
let direc = ''
// 鼠标松开时结束尺寸修改
function up() {//鼠标松开
resizeable = false
console.log("鼠标松开",resizeable)
}
var c1H,c2H,c3H
// 鼠标按下时开启尺寸修改
function down1(e) {//鼠标按下
downCn(e,1)
}
function down2(e) {//鼠标按下
downCn(e,2)
}
function down3(e) {//鼠标按下
downCn(e,3)
}
function downCn(e,n){
let d = getDirection(e,n)
console.log("鼠标按下",d)
// 当位置为四个边和四个角时才开启尺寸修改
if (d !== '') {
resizeable = true
numInt = n
direc = d
// 获取container1，container2，container3 div 的高度
c1H = container1.offsetHeight;
c2H = container2.offsetHeight;
c3H = container3.offsetHeight;
clientX = e.clientX
clientY = e.clientY
}
}
var count = 0;
// 鼠标移动事件
function move(e) {//鼠标移动事件
console.log("往上拖拽",resizeable)
/*count++;
// 当计数器为偶数的时候不执行mousemove
if( count % 2 === 0 ){
return;
}*/
// 实现拖拽功能的代码...
//var Height = document.documentElement.clientHeight //屏幕可视高度
let d = getDirection(e,1)
let d2 = getDirection(e,2)
let d3 = getDirection(e,3)
let cursor,cursor2,cursor3
if (d === '') cursor = 'default';
else cursor = d + '-resize';
if (d2 === '') cursor2 = 'default';
else cursor2 = d2 + '-resize';
if (d3 === '') cursor3 = 'default';
else cursor3 = d3 + '-resize';
// 修改鼠标显示效果
container1.style.cursor = cursor;
container2.style.cursor = cursor2;
container3.style.cursor = cursor3;
setResizeable(e,numInt)
}
function setResizeable(e,nIt){
var Height = document.documentElement.clientHeight //屏幕可视高度
// 当开启尺寸修改时，鼠标移动会修改div尺寸
/*if(nIt == 1){
if(resizeable){
// 鼠标按下的位置在底部，修改高度
if (direc.indexOf('s') !== -1) {
if((e.clientY - clientY) >= 0){//下
if(c2H != 15){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = Height - c3H - 45 + 'px'
container2.style.height = 15 + 'px'
up()
}
}else if((e.clientY - clientY) < 0){//上
if(c1H != minH){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = 15 + 'px'
container2.style.height = Height - c3H - 45 + 'px'
up()
}
}
c1H = container1.offsetHeight
c2H = container2.offsetHeight
c3H = container3.offsetHeight
clientY = e.clientY
}
}
}else if(nIt == 2){
}*/
if(resizeable){
if(nIt == 1){
if (direc.indexOf('s') !== -1) {
if((e.clientY - clientY) >= 0){//下
if(c2H != 15){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = Height - c3H - 45 + 'px'
container2.style.height = 15 + 'px'
up()
}
}else if((e.clientY - clientY) < 0){//上
if(c1H != minH){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = 15 + 'px'
container2.style.height = Height - c3H - 45 + 'px'
up()
}
}
c1H = container1.offsetHeight
c2H = container2.offsetHeight
c3H = container3.offsetHeight
clientY = e.clientY
}
}else if(nIt == 2){
// 鼠标按下的位置在底部，修改高度
if (direc.indexOf('s') !== -1) {
if((e.clientY - clientY) >= 0){//下
if(c3H != 15){
container2.style.height = Math.max(minH, container2.offsetHeight + (e.clientY - clientY)) + 'px'
container3.style.height = Math.max(minH, container3.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container2.style.height = Height - c1H - 45 + 'px'
container3.style.height = 15 + 'px'
up()
}
}else if((e.clientY - clientY) < 0){//上
if(c2H != minH){
container2.style.height = Math.max(minH, container2.offsetHeight + (e.clientY - clientY)) + 'px'
container3.style.height = Math.max(minH, container3.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container2.style.height = 15 + 'px'
container3.style.height = Height - c1H - 45 + 'px'
up()
}
}
c1H = container1.offsetHeight
c2H = container2.offsetHeight
c3H = container3.offsetHeight
clientY = e.clientY
}
// 鼠标按下的位置在上部，修改高度
if (direc.indexOf('n') !== -1) {
if((e.clientY - clientY) >= 0){//下
if(c2H != 15){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = Height - c3H - 45 + 'px'
container2.style.height = 15 + 'px'
up()
}
}else if((e.clientY - clientY) < 0){//上
if(c1H != minH){
container1.style.height = Math.max(minH, container1.offsetHeight + (e.clientY - clientY)) + 'px'
container2.style.height = Math.max(minH, container2.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container1.style.height = 15 + 'px'
container2.style.height = Height - c3H - 45 + 'px'
up()
}
}
c1H = container1.offsetHeight
c2H = container2.offsetHeight
c3H = container3.offsetHeight
clientY = e.clientY
}
}else if(nIt == 3){
if (direc.indexOf('n') !== -1) {
if((e.clientY - clientY) >= 0){//下
if(c3H != 15){
container2.style.height = Math.max(minH, container2.offsetHeight + (e.clientY - clientY)) + 'px'
container3.style.height = Math.max(minH, container3.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container2.style.height = Height - c1H - 45 + 'px'
container3.style.height = 15 + 'px'
up()
}
}else if((e.clientY - clientY) < 0){//上
if(c2H != minH){
container2.style.height = Math.max(minH, container2.offsetHeight + (e.clientY - clientY)) + 'px'
container3.style.height = Math.max(minH, container3.offsetHeight + (clientY - e.clientY) ) + 'px'
}else{
container2.style.height = 15 + 'px'
container3.style.height = Height - c1H - 45 + 'px'
up()
}
}
c1H = container1.offsetHeight
c2H = container2.offsetHeight
c3H = container3.offsetHeight
clientY = e.clientY
}
}
}
}
// 获取鼠标所在div的位置
function getDirection(ev,n) {
let xP, yP, offset, dir;
dir = '';
xP = ev.offsetX;
yP = ev.offsetY;
offset = 10;
if (yP < offset) dir += 'n';
else if (yP > window[`container${n}`].offsetHeight - offset) dir += 's';
if (xP < offset) dir += 'w';
else if (xP > window[`container${n}`].offsetWidth - offset) dir += 'e';
return dir;
}
</script>
</body>
</html>
运行效果如下：
鼠标移入边框按住鼠标可以上下拖到
类似与这种效果
