htc如何实现CHECKBOX控件？
复制代码 代码如下:
/*
描述:CHECKBOX控件
版本:1.1
备注:CHECKBOX控件背后跟随的文字
是获取CHECKBOX对象的htc_myLabel来显示的
更新添加indeter属性,用来增加不确定的选择
*/
<public:component>
<public:attachevent="oncontentready"onevent="fnInit()"/>
<public:attachevent="onpropertychange"onevent="fnPropertychange()"/>
<scriptlanguage="Javascript">
varcheckBoxImg=window.document.createElement("IMG");
ImageArray=[];
ImageArray["checkbox_false"]="checkbox_false.gif";
ImageArray["checkbox_false_down"]="checkbox_false_down.gif";
ImageArray["checkbox_false_over"]="checkbox_false_over.gif";
ImageArray["checkbox_true"]="checkbox_true.gif";
ImageArray["checkbox_true_down"]="checkbox_true_down.gif";
ImageArray["checkbox_true_over"]="checkbox_true_over.gif";
ImageArray["checkbox_indeter"]="checkbox_indeter.gif";
ImageArray["checkbox_indeter_down"]="checkbox_indeter_down.gif";
ImageArray["checkbox_indeter_over"]="checkbox_indeter_over.gif";
functionpreLoad(path,obj){
for(iinobj){
this[i]=newImage();
this[i].src=path+obj[i];
}
returnthis;
}
preb=newpreLoad("images/",ImageArray);
functionfnInit(){
varo=element;
if(o.type=="checkbox"){
var_table=window.document.createElement("TABLE");
_table.cellSpacing="0px";
_table.cellPadding="0px";
_table.border="0px";
if(o.disabled){
_table.style.filter="alpha(Opacity=50)";
}
else{
_table.style.filter="";
}
_table.style.display="inline";
var_tr=_table.insertRow();
var_td=_tr.insertCell();
if(o.checked){
checkBoxImg.src=preb["checkbox_true"].src;
}
else{
checkBoxImg.src=preb["checkbox_false"].src;
}
if(o.indeter=="true"){
o.indeterminate="true";
checkBoxImg.src=preb["checkbox_indeter"].src;
}
_td.appendChild(checkBoxImg);
_td=_tr.insertCell();
_td.style.verticalAlign="bottom";
if(o.htc_myLabel){
_td.innerHTML=" <labelstyle='cursor:hand'>"+o.htc_myLabel+"</label>";
}
o.insertAdjacentElement("afterEnd",_table);
o.style.display="none";
_table.attachEvent("onmouseover",function(){Baction("over")});
_table.attachEvent("onmouseout",function(){Baction("out")});
_table.attachEvent("onmousedown",function(){Baction("down")});
_table.attachEvent("onmouseup",function(){Baction("up")});
_table.attachEvent("onclick",function(){fnClick()});
}
}
functionfnPropertychange(){
varo=element;
switch(event.propertyName.toString().toLowerCase()){
case"checked":
Baction("up");
break;
}
}
functionfnClick(){
varo=element;
if(o.type=="checkbox"){
if(o.disabled)return;
if(o.checked){
checkBoxImg.src=preb["checkbox_false"].src;
}
else{
checkBoxImg.src=preb["checkbox_true"].src;
}
o.checked=!o.checked;
}
}
functionBaction(action){
varo=element;
if(o.type=="checkbox"){
if(o.disabled)return;
if(action=="up"||action=="over"){
if(o.indeterminate){
checkBoxImg.src=preb["checkbox_indeter_over"].src;
}
elseif(o.checked){
checkBoxImg.src=preb["checkbox_true_over"].src;
}
else{
checkBoxImg.src=preb["checkbox_false_over"].src;
}
}
if(action=="out"){
if(o.indeterminate){
checkBoxImg.src=preb["checkbox_indeter"].src;
}
elseif(o.checked){
checkBoxImg.src=preb["checkbox_true"].src;
}
else{
checkBoxImg.src=preb["checkbox_false"].src;
}
}
if(action=="down"){
if(o.indeterminate){
checkBoxImg.src=preb["checkbox_indeter_down"].src;
}
elseif(o.checked){
checkBoxImg.src=preb["checkbox_true_down"].src;
}
else{
checkBoxImg.src=preb["checkbox_false_down"].src;
}
o.indeterminate=false;
}
}
}
</script>
</public:component>
测试例子:
复制代码 代码如下:
<html>
<head>
<title>新文档</title>
<metaname="Generator"content="EditPlus">
<metaname="Author"content="FlashSoft">
<metaname="Keywords"content="">
<metaname="Description"content="FlashSoft">
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8">
<styletype="Text/Css">
input.checkbox{
behavior:url("behaviors/checkbox.htc");cursor:hand;
}
</style>
</head>
<body>
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="音乐"checked>
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="体育"disabled>
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="新闻">
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="不确定属性1"indeter="true"checked>
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="不确定属性2"indeter="true"disabled>
<inputname="chk1"type="checkbox"class="checkbox"htc_myLabel="不确定属性3"indeter="true">
</body>
</html>
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