电力项目七--js控制文字内容过长的显示和文本字数的显示

当文本框中文字内容过长时,需要调整显示的样式

 

如上图所示的样式

对应的代码为:

<div id="showInfomation" style="visibility: hidden"></div>
                            <tr onmouseover="this.style.backgroundColor = 'white'" onmouseout="this.style.backgroundColor = '#F5FAFE';">
                                <td style="HEIGHT:22px" align="center" width="40%">
                                    <div class="scrollStyle" align="left" onmouseover="showInfoWithPanel(this)" onmouseout="hiddenInfoPanel(this)" style="table-layout:fixed;">
                                    <!-- 站点运行情况 -->
                                        <s:property value="stationRun"/>
                                    </div>

 两个函数:

onmouseover="showInfoWithPanel(this)" 和 onmouseout="hiddenInfoPanel(this)"
对应的函数在前边引入的js中:
<link href="${pageContext.request.contextPath }/css/showText.css" type="text/css" rel="stylesheet">
<script language="javascript" src="${pageContext.request.contextPath }/script/showText.js"></script>
对应的js文件:
/*firefox*/function __firefox(){    HTMLElement.prototype.__defineGetter__("runtimeStyle", __element_style);    window.constructor.prototype.__defineGetter__("event", __window_event);    Event.prototype.__defineGetter__("srcElement", __event_srcElement);}function __element_style(){    return this.style;}function __window_event(){    return __window_event_constructor();}function __event_srcElement(){    return this.target;}function __window_event_constructor(){    if(document.all){        return window.event;    }    var _caller = __window_event_constructor.caller;    while(_caller!=null){        var _argument = _caller.arguments[0];        if(_argument){            var _temp = _argument.constructor;            if(_temp.toString().indexOf("Event")!=-1){                return _argument;            }        }        _caller = _caller.caller;    }    return null;}if(window.addEventListener){    __firefox();}/*end firefox*/ 

function showInfoWithPanel(obj){
   try{
          //var e=event||window.event;
          var showInfoWindow=document.getElementById("showInfomation");
          showInfoWindow.className="clsShowInfoWindow";
          showInfoWindow.style.visibility="visible";
          var x=document.body.scrollLeft+event.clientX+10;
          var y=event.clientY+document.body.scrollTop+10;//+document.documentElement.scrollTop;
          showInfoWindow.style.left=x;
          showInfoWindow.style.top=y;
          showInfoWindow.innerHTML="";
          showInfoWindow.innerHTML=obj.innerHTML;//+" clientY:"+y+" clientX:"+x;
          obj.style.color="red";
   }catch(e){alert("showInfoWithPanel:"+e.message);}
}
function hiddenInfoPanel(obj){
      try{
         var showInfoWindow=document.getElementById("showInfomation");
         if(showInfoWindow || typeof(showInfoWindow)!='undefined'){
          showInfoWindow.innerHTML="";
          showInfoWindow.style.visibility="hidden";
          }
          obj.style.color="#000000";
    }catch(e){alert("hiddenInfoPanel:"+e.message);}
}


首先获取到对应的变量,然后修改其显示的属性。
具体过程用google浏览器来调试,调试方法:如下图,在source中找到对应的js文件,断点进行调试
关于文本字数的显示
如图,文本下方显示文字的剩余个数

找到对应的代码:

<td class="ta_01" bgcolor="#ffffff" style="word-break: break-all">
      <!-- 站点运行情况数据回显 -->
      <s:textarea name="stationRun" id="stationRun" cssStyle=" 500px; height: 160px; padding: 1;FONT-FAMILY: 宋体; FONT-SIZE: 9pt" onkeydown="if(event.keyCode==13)addEnter('stationRun');" />
</td>

event.keyCode按的建的代码,13表示回车,输入回车后,文本内容中添加<br>

<script></script>中,window.onload是一个事件,当文档加载完成之后就会触发该事件

window.onload=function(){
  checkTextAreaLen();
}

对应的checkTextAreaLen()函数

 function checkTextAreaLen(){
        var stationRun = new Bs_LimitedTextarea('stationRun', 2500); 
        stationRun.infolineCssStyle = "font-family:arial; font-size:11px; color:gray;";
        stationRun.draw();    
      
        var devRun = new Bs_LimitedTextarea('devRun', 2500); 
        devRun.infolineCssStyle = "font-family:arial; font-size:11px; color:gray;";
        devRun.draw();    
  }
同时,对应的 Bs_LimitedTextarea()在  <script language="javascript" src="${pageContext.request.contextPath }/script/limitedTextarea.js"></script>的js中
function Bs_LimitedTextarea(elementId, maxLength) {
    var a = arguments;
    var arrayIndex=0;
    if (a.length==2) {
        elementId = a[0];
        maxLength = a[1];
        arrayIndex = 0;
    }
    if (a.length==3) {
        elementId = a[0];
        maxLength = a[1];
        arrayIndex = a[2];
    }
......还有很多
 这个js太复杂,用到的时候再看吧 ... ...

以上内容就是这两个js效果的描述

原文地址:https://www.cnblogs.com/taiguyiba/p/6880652.html