Clienside ProgressIndicator

Posted on 2008-04-03 16:32 bestcomy 阅读(1887) 评论(12) 编辑收藏所属分类: 随笔

var ProgressIndicator = {
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isShow : false,
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height : 100,
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width : 300,
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target : self,
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spinner : "../images/spinner.gif",
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show : function(width,height,target)
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{
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if(this.isShow==false)
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{
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if(arguments.length >= 2)
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{
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this.width = width;
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this.height = height;
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if(arguments.length>2)
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this.target = target;
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}
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var size = this.getMaskSize();
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this.target.document.body.insertAdjacentHTML("beforeEnd","<div id=\"maskskin\" style=\"position:absolute;left:0px;top:0px;background-color:#333333;opacity: .4;filter: alpha(opacity=40);z-index:1000;width:"+size.width+"px;height:"+size.height+"px;\"></div>");
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var position = this.getCenterPosition();
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this.target.document.body.insertAdjacentHTML("beforeEnd","<IFRAME name=\"masklayer\" style=\"border:1px solid buttontext;position:absolute;z-index:1001;left:"+position.left+"px;top:"+position.top+"px;\" frameborder=0 width=\""+this.width+"\" height=\""+this.height+"\" src=\"about:blank\"/>");
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var frameDoc = this.target.document.frames["masklayer"].document;
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frameDoc.open();
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frameDoc.write("<table width=\"100%\" height=\"100%\"><tr><td><img src=\""+this.spinner+"\"></td><td style=\"color:black;font-size:10pt;\"><b>Waiting

</b></td></tr><tr><td></td><td style=\"color:black;font-size:10pt;\">Be patient,processing

</td></tr></table>");
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frameDoc.close();
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this.isShow = true;
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this.addEvent(this.target, "resize", ProgressIndicator.centerProgressBar);
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this.addEvent(this.target, "scroll", ProgressIndicator.centerProgressBar);
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}
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//window.onscroll = this.centerProgressBar;
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},
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hide : function()
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{
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var maskFrame = this.target.document.getElementById("masklayer");
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maskFrame.parentNode.removeChild(maskFrame);
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var maskSkin = this.target.document.getElementById("maskskin");
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maskSkin.parentNode.removeChild(maskSkin);
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this.isShow = false;
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this.removeEvent(this.target, "resize", ProgressIndicator.centerProgressBar);
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this.removeEvent(this.target, "scroll", ProgressIndicator.centerProgressBar);
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},
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updateMessage : function(msg)
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{
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if(this.isShow)
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{
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var table = this.target.document.frames["masklayer"].document.getElementsByTagName("TABLE")[0];
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table.rows[1].cells[1].innerHTML = msg;
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}
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},
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addEvent : function(obj, evType, fn){
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if (obj.addEventListener){
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obj.addEventListener(evType, fn, false);
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return true;
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} else if (obj.attachEvent){
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var r = obj.attachEvent("on"+evType, fn);
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return r;
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} else {
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return false;
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}
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},
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removeEvent : function(obj, evType, fn, useCapture){
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if (obj.removeEventListener){
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obj.removeEventListener(evType, fn, useCapture);
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return true;
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} else if (obj.detachEvent){
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var r = obj.detachEvent("on"+evType, fn);
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return r;
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} else {
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alert("Handler could not be removed");
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}
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},
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getViewportHeight : function() {
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if (this.target.innerHeight!=this.target.undefined) return this.target.innerHeight;
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if (this.target.document.compatMode=='CSS1Compat') return this.target.document.documentElement.clientHeight;
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if (this.target.document.body) return this.target.document.body.clientHeight;
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return this.target.undefined;
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},
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getViewportWidth : function(){
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var offset = 17;
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var width = null;
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if (this.target.innerWidth!=this.target.undefined) return this.target.innerWidth;
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if (this.target.document.compatMode=='CSS1Compat') return this.target.document.documentElement.clientWidth;
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if (this.target.document.body) return this.target.document.body.clientWidth;
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},
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getScrollTop : function(){
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if (self.pageYOffset) // all except Explorer
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{
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return self.pageYOffset;
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}
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else if (this.target.document.documentElement && this.target.document.documentElement.scrollTop)
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// Explorer 6 Strict
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{
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return this.target.document.documentElement.scrollTop;
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}
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else if (this.target.document.body) // all other Explorers
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{
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return this.target.document.body.scrollTop;
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}
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},
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getScrollLeft : function(){
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if (self.pageXOffset) // all except Explorer
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{
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return self.pageXOffset;
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}
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else if (this.target.document.documentElement && this.target.document.documentElement.scrollLeft)
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// Explorer 6 Strict
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{
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return this.target.document.documentElement.scrollLeft;
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}
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else if (this.target.document.body) // all other Explorers
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{
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return this.target.document.body.scrollLeft;
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}
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},
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getMaskSize : function()
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{
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var theBody = this.target.document.getElementsByTagName("BODY")[0];
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var fullHeight = this.getViewportHeight();
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var fullWidth = this.getViewportWidth();
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// Determine what's bigger, scrollHeight or fullHeight / width
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if (fullHeight > theBody.scrollHeight) {
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popHeight = fullHeight;
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} else {
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popHeight = theBody.scrollHeight;
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}
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if (fullWidth > theBody.scrollWidth) {
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popWidth = fullWidth;
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} else {
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popWidth = theBody.scrollWidth;
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}
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return {width:popWidth,height:popHeight+this.height};
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},
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getCenterPosition : function()
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{
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//var theBody = document.documentElement;
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var theBody = this.target.document.getElementsByTagName("BODY")[0];
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//theBody.style.overflow = "hidden";
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var scTop = parseInt(this.getScrollTop(),10);
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var scLeft = parseInt(theBody.scrollLeft,10);
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var fullHeight = this.getViewportHeight();
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var fullWidth = this.getViewportWidth();
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var top = scTop + ((fullHeight - this.height) / 2);
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var left = scLeft + ((fullWidth - this.width) / 2);
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return {top:top,left:left};
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},
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centerProgressBar : function()
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{
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if(ProgressIndicator.isShow)
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{
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var position = ProgressIndicator.getCenterPosition();
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var maskdiv = ProgressIndicator.target.document.getElementsByName("masklayer")[0];
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maskdiv.style.top = position.top + "px";
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maskdiv.style.left = position.left + "px";
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}
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}
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};

<html>
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<head>
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<title>ProgressIndicator Demo</title>
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<!--
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ProgressIndicator.spinner = "spinner.gif";
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//-->
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</script>
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