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JS implementation of photo-wall Function Example _javascript skills

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This paper illustrates the method of realizing the function of photo wall with JS. Share to everyone for your reference. The implementation methods are as follows:

Copy Code code as follows:
<!doctype html>


<html xmlns= "http://www.w3.org/1999/xhtml" xmlns:html5= "http://www.w3.org/1999/xhtml" >


<head>


<meta charset= "Utf-8" >


<title>js Photo Wall </title>


<meta http-equiv= "x-ua-compatible" content= "Edge" >


<meta name= "viewport" content= "Width=device-width, initial-scale=1" >


<meta name= "Keywords" content= "JS photo Wall" >


<meta name= "description" content= "JS photo Wall" >


<link href= "Css/style.css" rel= "stylesheet" >


<script src= "Move.js" ></script>


<style>


*{padding:0; margin:0;}


Li{list-style:none;}


ul{width:660px height:510px; background: #ccc; margin:20px auto;}


li{width:200px; height:150px; margin:10px; float:left;}


</style>


<script>


/*


var arr=[' A ', ' B ', ' C ', ' d ', ' e ', ' d ', ' F ';


var pos = arr.lastindexof (' d ');


Alert (POS);


*/


Window.onload=function () {


var aLi = document.queryselectorall (' li ');


var oinput = document.queryselector (' #btn ');


var pos = [];


var len= ali.length;


var izindex= 2;


Layout transformation

for (Var i=0;i<len;i++) {


Pos.push ([ali[i].offsetleft,ali[i].offsettop]);


}


for (Var i=0;i<len;i++) {


ali[i].style.left=pos[i][0]+ ' px ';


ali[i].style.top=pos[i][1]+ ' px ';


ali[i].style.position = ' absolute ';


Ali[i].style.margin = ' 0px ';


}


for (Var i=0;i<len;i++) {


Ali[i].index = i;


Setdrag (Ali[i]);


}


Oinput.onclick=function () {


var Randomarr = [0,1,2,3,4,5,6,7,8];


Randomarr.sort (function (num1,num2) {


Return Math.random ()-0.5;


})


for (Var i=0;i<len;i++) {


Increase the random position of the situation


Startmove (Ali[i],{left:pos[randomarr[i]][0],top:pos[randomarr[i]][1]});


Fixed index


Ali[i].index = Randomarr[i];


}


}


Drag


function Setdrag (obj) {


Obj.onmousedown =function (EV) {


izindex++;


Obj.style.zindex= Izindex;


var ev = EV | | Event


var disx = Ev.clientx-obj.offsetleft;


var disy = ev.clienty-obj.offsettop;


Document.onmousemove=function (EV) {


var ev = EV | | Event


Obj.style.left = ev.clientx-disx + ' px ';


Obj.style.top = Ev.clienty-disy + ' px ';


for (var i=0; i<len; i++) {


Ali[i].style.border= ' None ';


}


var NL = Nearli (obj);


if (NL) {


Nl.style.border= ' 2px solid red ';


}


}


document.onmouseup= function () {


Document.onmousemove = null;


Document.onmouseup = null;


var NL = Nearli (obj);


if (NL) {


Nl.style.border= ' 2px solid red ';


Startmove (Obj,{left:pos[nl.index][0],top:pos[nl.index][1]});


Startmove (Nl,{left:pos[obj.index][0],top:pos[obj.index][1]});


var tmp =nl.index;


Nl.index = Obj.index;


Obj.index = tmp;


Nl.style.border= ';


}else{


Startmove (Obj,{left:pos[obj.index][0],top:pos[obj.index][1]});


}


}


return false;


}


}


Detect if there is a collision


function Isdump (obj1,obj2) {


var l1= obj1.offsetleft;


var r1= l1+obj1.offsetwidth;


var t1= obj1.offsettop;


var B1 =obj1.offsetheight +t1;

var l2= obj2.offsetleft;


var r2= l2+obj2.offsetwidth;


var t2= obj2.offsettop;


var B2 =obj2.offsetheight +t2;


if (b2<t1 | | l2>r1 | | r2<l1 | | t2>b1) {


return false;


}else{


return true;


}


}


Find the nearest node


function Nearli (obj) {


var index=-1;


var value = 9999;


for (var i=0; i<len; i++) {


if (Isdump (obj,ali[i]) && obj!=ali[i]) {


var c = Getdis (Obj,ali[i]);


if (c <value) {


value = C;


index = i;


}


}


}


if (index!=-1) {


return Ali[index];


}else{


return false;


}


}


function Getdis (obj1,obj2) {


var x = Obj1.offsetleft-obj2.offsetleft;


var y = obj1.offsettop-obj2.offsettop;


Return Math.sqrt (Math.pow (x,2) +math.pow (y,2));


}


}


</script>


</head>


<body>


<button id= "BTN" >click</button>


<ul>


<li><img src= "1l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "2l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "3l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "4l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "5l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "6l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "1l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "2l.jpg" width= "200px" height= "150px" ></li>


<li><img src= "4l.jpg" width= "200px" height= "150px" ></li>


</ul>


</body>


</html>

I hope this article will help you with your JavaScript programming.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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