js模拟电脑选择多文件夹效果_选区代码- Javascript

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Javascript 中的 js模拟电脑选择多文件夹效果_选区代码

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-12 浏览: 239 ::

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js怎样实现下拉框改变，它旁边的图像也改变 js实现小鱼吐泡泡在页面游动特效

模仿选择文件夹效果的javascript封装类，效果不错，实际应用呢，暂时用不到，大家可以学习思路代码很简单，会继续完善。。。
按住鼠标键不动，拖动鼠标，会看到效果

点击运行可以看到效果:

<html> <head></head> <style> body{padding:100px;} .fileDiv{float:left;width:100px;height:100px;text-align:center;line-height:100px;font-size:12px;border:1px solid #cccccc;margin-right:10px;margin-bottom:10px;} .seled{border:1px solid #ff0000;background-color:#D6DFF7;} </style> <script type="text/javascript"> (function(){ document.onmousedown = function(){ var selList = [];
var fileNodes = document.getElementsByTagName("div"); for(var i=0; i < fileNodes.length; i++){ if(fileNodes[i].className.indexOf("fileDiv")!=-1){ fileNodes[i].className = "fileDiv"; selList.push(fileNodes[i]); } } var isSelect = true; var evt = window.event || arguments[0]; var startX = (evt.x || evt.clientX); var startY = (evt.y || evt.clientY); var selDiv = document.createElement("div"); selDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;"; selDiv.id = "selectDiv"; document.body.appendChild(selDiv); selDiv.style.left = startX +"px"; selDiv.style.top = startY +"px"; var _x = null; var _y = null; clearEventBubble(evt); document.onmousemove = function(){ evt = window.event || arguments[0]; if(isSelect){ if(selDiv.style.display == "none"){ selDiv.style.display = "";} _x = (evt.x || evt.clientX); _y = (evt.y || evt.clientY); selDiv.style.left = Math.min(_x, startX)+"px"; selDiv.style.top = Math.min(_y, startY) +"px"; selDiv.style.width = Math.abs(_x - startX) +"px"; selDiv.style.height = Math.abs(_y - startY)+"px"; // ---------------- 关键算法 --------------------- var _l = selDiv.offsetLeft, _t = selDiv.offsetTop; var _w = selDiv.offsetWidth, _h = selDiv.offsetHeight; for(var i=0; i< selList.length; i++){ var sl = selList[i].offsetWidth + selList[i].offsetLeft; var st = selList[i].offsetHeight + selList[i].offsetTop; if(sl > _l && st > _t && selList[i].offsetLeft < _l+_w && selList[i].offsetTop < _t + _h){ if(selList[i].className.indexOf("seled") == -1){ selList[i].className = selList[i].className +" seled"; } }else{ if(selList[i].className.indexOf("seled") != -1){ selList[i].className = "fileDiv"; } } } } clearEventBubble(evt); } document.onmouseup = function(){ isSelect = false; if(selDiv){ document.body.removeChild(selDiv); showSelDiv(selList); } selList = null,_x = null,_y = null,selDiv = null,startX = null,startY = null, evt = null; } } })(); function clearEventBubble(evt){ if (evt.stopPropagation) evt.stopPropagation(); else evt.cancelBubble = true;
if (evt.preventDefault) evt.preventDefault(); else evt.returnValue = false; }
//www.ruanchen.com 软晨学习网 function showSelDiv(arr){ var count =0; var selInfo = ""; for(var i=0; i<arr.length;i++){ if(arr[i].className.indexOf("seled")!=-1){ count ++; selInfo += arr[i].innerHTML+"\n"; } } alert("软晨学习网共选择 "+count+" 个文件，分别是：\n"+selInfo); } </script> <body> <div class="fileDiv">file1</div> <div class="fileDiv">file2</div> <div class="fileDiv">file3</div> <div class="fileDiv">file4</div> <div class="fileDiv">file5</div> <div class="fileDiv">file6</div> <div class="fileDiv">file7</div> <div class="fileDiv">file8</div> <div class="fileDiv">file9</div> </body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

update:
1. 针对前2个beta版，该版本修复了前两个版本出现的 bug ，
2. 进行了代码的简单封装（由于本人初学js，对js掌握的很浅，因此面向对象的理解很差，封装的不好）；
3. 增加了对 Ctrl 和 Shift 键的支持(目前shift键的功能和ctrl键的功能一样，还不能达到仿windows的选区Shift键的功能)。
4. 增加了获取“被选区选中元素”的方法，可以点击按钮“getRegions”看效果。
调用方法：

复制代码代码如下:

new RegionSelect({ 
region:'div.fileDiv', 
selectedClass: 'seled' 
}).select();

增强效果代码

点击运行可以看到效果:

<html> <head></head> <style> body{padding-top:50px;padding-left:100px;padding-right:150px;} .fileDiv{float:left;width:100px;height:100px;text-align:center;line-height:100px;font-size:12px;border:1px solid #cccccc;margin-right:10px;margin-bottom:10px;} .seled{border:1px solid #ff0000;background-color:#D6DFF7;} </style> <script type="text/javascript">
/*--------------------------------- 以下4个方法 摘自网络 ----------------------------------------*/
Array.prototype.remove = function( item ){ for( var i = 0 ; i < this.length ; i++ ){ if( item == this[i] ) break; } if( i == this.length ) return; for( var j = i ; j < this.length - 1 ; j++ ){ this[ j ] = this[ j + 1 ]; } this.length--; }
String.prototype.replaceAll = function (AFindText,ARepText){ raRegExp = new RegExp(AFindText,"g"); return this.replace(raRegExp,ARepText);}
function getAllChildren(e) {
return e.all ? e.all : e.getElementsByTagName('*');
}
document.getElementsBySelector = function(selector) {
if (!document.getElementsByTagName) {
return new Array();
}
var tokens = selector.split(' ');
var currentContext = new Array(document);
for (var i = 0; i < tokens.length; i++) {
token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
if (token.indexOf('#') > -1) {
var bits = token.split('#');
var tagName = bits[0];
var id = bits[1];
var element = document.getElementById(id);
if (tagName && element.nodeName.toLowerCase() != tagName) {
return new Array();
}
currentContext = new Array(element);
continue;
}
if (token.indexOf('.') > -1) {
var bits = token.split('.');
var tagName = bits[0];
var className = bits[1];
if (!tagName) {
tagName = '*';
}
var found = new Array;
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements;
if (tagName == '*') {
elements = getAllChildren(currentContext[h]);
} else {
elements = currentContext[h].getElementsByTagName(tagName);
}
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = new Array;
var currentContextIndex = 0;
for (var k = 0; k < found.length; k++) {
if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
currentContext[currentContextIndex++] = found[k];
}
}
continue;
}
if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
var tagName = RegExp.$1;
var attrName = RegExp.$2;
var attrOperator = RegExp.$3;
var attrValue = RegExp.$4;
if (!tagName) {
tagName = '*';
}
var found = new Array;
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements;
if (tagName == '*') {
elements = getAllChildren(currentContext[h]);
} else {
elements = currentContext[h].getElementsByTagName(tagName);
}
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = new Array;
var currentContextIndex = 0;
var checkFunction;
switch (attrOperator) {
case '=':
checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
break;
case '~':
checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
break;
case '|':
checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
break;
case '^':
checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
break;
case '$':
checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
break;
case '*':
checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
break;
default :
checkFunction = function(e) { return e.getAttribute(attrName); };
}
currentContext = new Array;
var currentContextIndex = 0;
for (var k = 0; k < found.length; k++) {
if (checkFunction(found[k])) {
currentContext[currentContextIndex++] = found[k];
}
}
continue;
}
tagName = token;
var found = new Array;
var foundCount = 0;
for (var h = 0; h < currentContext.length; h++) {
var elements = currentContext[h].getElementsByTagName(tagName);
for (var j = 0; j < elements.length; j++) {
found[foundCount++] = elements[j];
}
}
currentContext = found;
}
return currentContext;
}
/*--------------------------------------------------------------------------------------------------------*/
/**
* author: 王永山
* version: 1.1 beta
* date: 2008-09-09
* email: [email]wangys0927@163.com[/email]
*
* update:
* 1. 针对前2个beta版，该版本修复了前两个版本出现的 bug ，
* 2. 进行了代码的简单封装（由于本人初学js，对js掌握的很浅，因此面向对象的理解很差，封装的不好）；
* 3. 增加了对 Ctrl 和 Shift 键的支持(目前shift键的功能和ctrl键的功能一样，还不能达到仿windows的选区Shift键的功能)。
* 4. 增加了获取“被选区选中元素”的方法，可以点击按钮“getRegions”看效果。
*/
function addEvent(eventType,eventFunc,eventObj){ eventObj = eventObj || document; if(window.attachEvent) eventObj.attachEvent("on"+eventType,eventFunc);
if(window.addEventListener) eventObj.addEventListener(eventType,eventFunc,false);
}
function clearEventBubble(evt){ evt = evt || window.event; if (evt.stopPropagation) evt.stopPropagation(); else evt.cancelBubble = true;
if (evt.preventDefault) evt.preventDefault(); else evt.returnValue = false;
}
function posXY(event){ event = event || window.event;
var posX = event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft));
var posY = event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop));
return {x:posX, y:posY};
}
//----------- 区域选择关键方法 ----------------------- var _selectedRegions = []; function RegionSelect(selRegionProp){ this.regions =[]; var _regions = document.getElementsBySelector(selRegionProp["region"]); if(_regions && _regions.length > 0){ var _self = this; for(var i=0; i< _regions.length;i++){ _regions[i].onmousedown = function(){ var evt = window.event || arguments[0]; if(!evt.shiftKey && !evt.ctrlKey){ // 清空所有select样式 _self.clearSelections(_regions); this.className += " "+_self.selectedClass; // 清空selected数组，并加入当前select中的元素 _selectedRegions = []; _selectedRegions.push(this); }else{ if(this.className.indexOf(_self.selectedClass) == -1){ this.className += " "+_self.selectedClass; _selectedRegions.push(this); }else{ this.className = this.className.replaceAll(_self.selectedClass,""); _selectedRegions.remove(this); } } clearEventBubble(evt); } this.regions.push(_regions[i]); } } this.selectedClass = selRegionProp["selectedClass"]; this.selectedRegion = []; this.selectDiv = null; this.startX = null; this.startY = null; } RegionSelect.prototype.select = function(){ var _self = this; addEvent("mousedown",function(){ var evt = window.event || arguments[0]; _self.onBeforeSelect(evt); clearEventBubble(evt); },document); addEvent("mousemove",function(){ var evt = window.event || arguments[0]; _self.onSelect(evt); clearEventBubble(evt); },document); addEvent("mouseup",function(){ _self.onEnd(); },document); } RegionSelect.prototype.onBeforeSelect = function(evt){ // 创建模拟 选择框 if(!document.getElementById("selContainer")){ this.selectDiv = document.createElement("div"); this.selectDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;"; this.selectDiv.id = "selContainer"; document.body.appendChild(this.selectDiv); }else{ this.selectDiv = document.getElementById("selContainer"); } this.startX = posXY(evt).x; this.startY = posXY(evt).y; this.isSelect = true; } RegionSelect.prototype.onSelect = function(evt){ var _self = this; if(_self.isSelect){ if(_self.selectDiv.style.display == "none") _self.selectDiv.style.display = ""; var posX = posXY(evt).x; var poxY = posXY(evt).y; _self.selectDiv.style.left = Math.min(posX, this.startX); _self.selectDiv.style.top = Math.min(poxY, this.startY); _self.selectDiv.style.width = Math.abs(posX - this.startX); _self.selectDiv.style.height = Math.abs(poxY - this.startY); var regionList = _self.regions; for(var i=0; i< regionList.length; i++){ var r = regionList[i], sr = _self.innerRegion(_self.selectDiv,r); if(sr && r.className.indexOf(_self.selectedClass) == -1){ r.className = r.className + " "+_self.selectedClass; _selectedRegions.push(r); }else if(!sr && r.className.indexOf(_self.selectedClass) != -1){ r.className = r.className.replaceAll(_self.selectedClass,""); _selectedRegions.remove(r); } } } } RegionSelect.prototype.onEnd = function(){ if(this.selectDiv){ this.selectDiv.style.display = "none"; } this.isSelect = false; //_selectedRegions = this.selectedRegion; } // 判断一个区域是否在选择区内 RegionSelect.prototype.innerRegion = function(selDiv, region){ var s_top = parseInt(selDiv.style.top); var s_left = parseInt(selDiv.style.left); var s_right = s_left + parseInt(selDiv.offsetWidth); var s_bottom = s_top + parseInt(selDiv.offsetHeight); var r_top = parseInt(region.offsetTop); var r_left = parseInt(region.offsetLeft); var r_right = r_left + parseInt(region.offsetWidth); var r_bottom = r_top + parseInt(region.offsetHeight); var t = Math.max(s_top, r_top);
var r = Math.min(s_right, r_right);
var b = Math.min(s_bottom, r_bottom);
var l = Math.max(s_left, r_left);
if (b > t+5 && r > l+5) {
return region;
} else {
return null;
} } RegionSelect.prototype.clearSelections = function(regions){ for(var i=0; i<regions.length;i++){ regions[i].className = regions[i].className.replaceAll(this.selectedClass,""); } } function getSelectedRegions(){ return _selectedRegions; }
/*-------------------------------------- 区域选择方法结束 --------------------------------------------*/ function showSelDiv(){ var selInfo = ""; var arr = getSelectedRegions(); for(var i=0; i<arr.length;i++){ selInfo += arr[i].innerHTML+"\n"; } alert("共选择 "+arr.length+" 个文件，分别是：\n"+selInfo); } </script> <body>
<button onclick="showSelDiv();">getRegions</button>
<div class="fileDiv">file1</div>
<div class="fileDiv">file2</div>
<div class="fileDiv">file3</div>
<div class="fileDiv">file4</div>
<div class="fileDiv">file5</div>
<div class="fileDiv">file6</div>
<div class="fileDiv">file7</div>
<div class="fileDiv">file8</div>
<div class="fileDiv">file9</div>
<div class="fileDiv">file10</div>
<div class="fileDiv">file11</div>
<div class="fileDiv">file12</div>
<div class="fileDiv">file13</div>
<div class="fileDiv">file14</div>
<div class="fileDiv">file15</div>
<div class="fileDiv">file16</div>
<div class="fileDiv">file17</div>
<div class="fileDiv">file18</div>
<div class="fileDiv">file19</div>
<div class="fileDiv">file20</div>
<div class="fileDiv">file21</div>
<div class="fileDiv">file22</div>
<div class="fileDiv">file23</div>
<div class="fileDiv">file24</div>
<div class="fileDiv">file25</div>
<div class="fileDiv">file26</div>
<div class="fileDiv">file27</div>
<div class="fileDiv">file28</div>
<div class="fileDiv">file29</div>
<div class="fileDiv">file30</div>
<div class="fileDiv">file31</div>
<div class="fileDiv">file32</div>
<div class="fileDiv">file33</div>
<div class="fileDiv">file34</div>
<div class="fileDiv">file35</div>
<div class="fileDiv">file36</div>
<div class="fileDiv">file37</div>
<div class="fileDiv">file38</div>
<div class="fileDiv">file39</div>
<div class="fileDiv">file40</div>
<div class="fileDiv">file41</div>
<div class="fileDiv">file42</div>
<div class="fileDiv">file43</div>
<div class="fileDiv">file44</div>
<div class="fileDiv">file45</div>
<div class="fileDiv">file46</div>
<div class="fileDiv">file47</div>
<div class="fileDiv">file48</div>
<div class="fileDiv">file49</div>
<div class="fileDiv">file50</div>
<div class="fileDiv">file51</div>
<div class="fileDiv">file52</div>
<div class="fileDiv">file53</div>
<div class="fileDiv">file54</div>
<div class="fileDiv">file55</div>
<div class="fileDiv">file56</div>
<div class="fileDiv">file57</div>
<div class="fileDiv">file58</div>
<div class="fileDiv">file59</div>
<div class="fileDiv">file60</div>
<div style="float:left;width:100%;"><button onclick="showSelDiv();">getRegions</button></div> </body> <script>
new RegionSelect({ region:'div.fileDiv', selectedClass: 'seled'
}).select(); </script>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

js怎样实现下拉框改变，它旁边的图像也改变 js实现小鱼吐泡泡在页面游动特效

Javascript 中的 js模拟电脑选择多文件夹效果_选区代码

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