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javascript - 纯 Javascript : onClick executes toggle rows -- need image swap

转载 作者：行者123 更新时间：2023-11-30 06:34:16 24 4
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第一次发帖，看了很久。堆栈溢出摇滚!

需要一些帮助。我主要是一名商业智能/数据仓库专业人士。我需要使用一些 Javascript 在报告编写工具中创建折叠行报告，我无法预期调用 JQuery(内部 LAN 部署)的能力。因此我需要纯 Javascript。

前提是我需要打开的报告仅包含经理/地区级别的行，但能够打开地区集群以查看分配的销售代表及其贡献。

我找到了执行此操作的代码(实际上通过隐藏重复的区域经理的名字很好地实现了)，但它使用文本对象(“+”和“--”)来呈现 OnClick 事件后面的链接。我真的，真的，真的，真的需要让它显示交替的图像。

我尝试简单地修改这两个部分，但第一个 block 中渲染图像的代码与第二个 block 中的代码不匹配，这导致三元运算失败并且图像没有按预期交替。

  1. lnk.innerHTML =(lnk.innerHTML == "+")?"--":"+";

  2. var link ='<a href="#" onclick="toggleSection(this);return false;" style="text-decoration: none">+</a>';

下面的代码包含用于 onClick 操作的工作代码，下面是一个简单的 onClick 切换图像。本质上，我需要文件夹图标位于经理/地区网格的第一个单元格中。为了节省空间，我将工作折叠代码强制放入主 Javascript block 中。

任何帮助、见解、指导、电牛电击(哎哟)都将不胜感激。

提前致谢。

更新:为此创建了一个 CodePen，以便更轻松地查看现在有效的方法:

http://codepen.io/anon/pen/yjLvh

谢谢!

<html>
<head>
<style type="text/css">
table { empty-cells: show; }
cell {font-family:'Calibri';font-size:11.0pt;color: #000000;}
TD{font-family: Calibri; font-size: 10.5pt;}
TH{font-family: Calibri; font-size: 10.5pt; }
</style>

</head>
<body>
<SCRIPT type=text/javascript> 
var tbl;
var toggleimage=new Array("http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_open_folder.png","http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_closed_folder.png")

function trim(str){
 return str.replace(/^\s*|\s*$/g,"");
}

function getParent(el, pTagName) {
 if (el == null) return null;
 else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) // Gecko bug, supposed to be uppercase
  return el;
 else
  return getParent(el.parentNode, pTagName);
}

function toggleSection(lnk){

 var td = lnk.parentNode;
 var table = getParent(td,'TABLE');
 var len = table.rows.length;
 var tr = getParent(td, 'tr');
 var rowIndex = tr.rowIndex;
 var rowHead=table.rows[rowIndex].cells[1].innerHTML;

lnk.innerHTML =(lnk.innerHTML == "+")?"--":"+";

 vStyle =(tbl.rows[rowIndex+1].style.display=='none')?'':'none';

 for(var i = rowIndex+1; i < len;i++){
  if (table.rows[i].cells[1].innerHTML==rowHead){
    table.rows[i].style.display= vStyle;
    table.rows[i].cells[1].style.visibility="hidden";
  }
 }
}

function toggleRows(){
    tables =document.getElementsByTagName("table");
    for(i =0; i<tables.length;i++){
      if(tables[i].className.indexOf("expandable") != -1)
        tbl =tables[i];
    }
    if(typeof tbl=='undefined'){
     alert("Could not find a table of expandable class");
     return;
    }

//assume the first row is headings and the first column is empty
 var len = tbl.rows.length;
var link ='<a href="#" onclick="toggleSection(this);return false;" style="text-decoration: none">+</a>';

 var rowHead = tbl.rows[1].cells[1].innerHTML;

 for (j=1; j<len;j++){
  //check the value in each row of column 2
  var m = tbl.rows[j].cells[1].innerHTML;

if(m!=rowHead || j==1){
   rowHead=m;
   tbl.rows[j].cells[0].innerHTML = link;
//   tbl.rows[j].cells[0].style.textAlign="center";
   tbl.rows[j].style.background = "#FFFFFF";
  }
else
   tbl.rows[j].style.display = "none";
}

}
var oldEvt = window.onload;

var preload_image_1=new Image()
var preload_image_2=new Image()
preload_image_1.src=toggleimage[0]
preload_image_2.src=toggleimage[1]
var i_image=0

function testloading() {
    isloaded=true
}

function toggle() {
    if (isloaded) {
        document.togglepicture.src=toggleimage[i_image]
    }
    i_image++
    if (i_image>1) {i_image=0}
}

window.onload = function() { if (oldEvt) oldEvt(); toggleRows(); testloading();}


</SCRIPT>

<TABLE class=expandable width="400px" border="1"  cellspacing="0" frame="box" rules="all" >
  <THEAD>
  <TR>
    <TH  bgColor="#E6E4D4">&nbsp;</TH>
    <TH bgColor="#E6E4D4" align="left">Manager</TH>
    <TH bgColor="#E6E4D4" align="left">Sales Rep</TH>
    <TH bgColor="#E6E4D4" align="left">Amount </TH></TR>
</THEAD>
  <TBODY>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD><i>Georgia District Reps</i></TD>
    <TD>500000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD>Rex Smtih</TD>
    <TD>350000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD>Alex Anderson</TD>
    <TD>150000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD><i>Texas District Reps</i></TD>
    <TD>630000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD>Bill Smith</TD>
    <TD>410000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD>Simon Wilkes</TD>
    <TD>220000</TD></TR>
</TBODY></font></TABLE>
<br>
<br>
<a href="javascript:toggle()"><img name="togglepicture" src="http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_closed_folder.png" border="0"></a>


</body>
</html>

最佳答案

working demo 

<html>
<head>
<style type="text/css">
table { empty-cells: show; }
cell {font-family:'Calibri';font-size:11.0pt;color: #000000;}
TD{font-family: Calibri; font-size: 10.5pt;}
TH{font-family: Calibri; font-size: 10.5pt; }
</style>

</head>
<body>
<SCRIPT type=text/javascript> 
var tbl;
var toggleimage=new Array("http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_open_folder.png","http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_closed_folder.png")

  var closedImgHTML = "<img name=\"togglepicture\" src=\"http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_closed_folder.png\" border=\"0\" height=\"20\">";

  var openImgHTML = "<img name=\"togglepicture\" src=\"http://www.iconlooker.com/user-content/uploads/wall/thumb/misc._icons_open_folder.png\" border=\"0\" height=\"20\">";

function trim(str){
 return str.replace(/^\s*|\s*$/g,"");
}

function getParent(el, pTagName) {
 if (el == null) return null;
 else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) // Gecko bug, supposed to be uppercase
  return el;
 else
  return getParent(el.parentNode, pTagName);
}

function toggleSection(lnk){

 var td = lnk.parentNode;
 var table = getParent(td,'TABLE');
 var len = table.rows.length;
 var tr = getParent(td, 'tr');
 var rowIndex = tr.rowIndex;
 var rowHead=table.rows[rowIndex].cells[1].innerHTML;



lnk.innerHTML =(lnk.innerHTML == openImgHTML)?closedImgHTML:openImgHTML;

 vStyle =(tbl.rows[rowIndex+1].style.display=='none')?'':'none';

 for(var i = rowIndex+1; i < len;i++){
  if (table.rows[i].cells[1].innerHTML==rowHead){
    table.rows[i].style.display= vStyle;
    table.rows[i].cells[1].style.visibility="hidden";
  }
 }
}

function toggleRows(){
    tables =document.getElementsByTagName("table");
    for(i =0; i<tables.length;i++){
      if(tables[i].className.indexOf("expandable") != -1)
        tbl =tables[i];
    }
    if(typeof tbl=='undefined'){
     alert("Could not find a table of expandable class");
     return;
    }

//assume the first row is headings and the first column is empty
 var len = tbl.rows.length;
var link ='<a href="#" onclick="toggleSection(this);return false;" style="text-decoration: none">'+closedImgHTML+'</a>';

 var rowHead = tbl.rows[1].cells[1].innerHTML;

 for (j=1; j<len;j++){
  //check the value in each row of column 2
  var m = tbl.rows[j].cells[1].innerHTML;

if(m!=rowHead || j==1){
   rowHead=m;
   tbl.rows[j].cells[0].innerHTML = link;
//   tbl.rows[j].cells[0].style.textAlign="center";
   tbl.rows[j].style.background = "#FFFFFF";
  }
else
   tbl.rows[j].style.display = "none";
}

}
var oldEvt = window.onload;

var preload_image_1=new Image()
var preload_image_2=new Image()
preload_image_1.src=toggleimage[0]
preload_image_2.src=toggleimage[1]
var i_image=0

function testloading() {
    isloaded=true
}

function toggle() {
    if (isloaded) {
        document.togglepicture.src=toggleimage[i_image]
    }
    i_image++
    if (i_image>1) {i_image=0}
}

window.onload = function() { if (oldEvt) oldEvt(); toggleRows(); testloading();}


</SCRIPT>

<TABLE class=expandable width="400px" border="1"  cellspacing="0" frame="box" rules="all" >
  <THEAD>
  <TR>
    <TH  bgColor="#E6E4D4">&nbsp;</TH>
    <TH bgColor="#E6E4D4" align="left">Manager</TH>
    <TH bgColor="#E6E4D4" align="left">Sales Rep</TH>
    <TH bgColor="#E6E4D4" align="left">Amount </TH></TR>
</THEAD>
  <TBODY>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD><i>Georgia District Reps</i></TD>
    <TD>500000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD>Rex Smtih</TD>
    <TD>350000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>Sarah Jones</TD>
    <TD>Alex Anderson</TD>
    <TD>150000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD><i>Texas District Reps</i></TD>
    <TD>630000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD>Bill Smith</TD>
    <TD>410000</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>William Hobby</TD>
    <TD>Simon Wilkes</TD>
    <TD>220000</TD></TR>
</TBODY></font></TABLE>
<br>
<br>
<a href="javascript:toggle()"></a>


</body>
</html>

关于javascript - 纯 Javascript : onClick executes toggle rows -- need image swap，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15588909/

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