JavaScript DHTML/Development/ProgressBar
Содержание
Javascript progress bar
<source lang="html4strict">
/* JavaScript Bible, Fourth Edition by Danny Goodman John Wiley & Sons CopyRight 2001
- /
<HTML> <HEAD> <TITLE>getExpression(), setExpression(), and recalc() Methods</TITLE> <STYLE TYPE="text/css"> TH {text-align:right} SPAN {vertical-align:bottom} </STYLE> <SCRIPT LANGUAGE="JavaScript"> var now = new Date() var shortWidth = 5 var multiple = 2.5 function init() {
with (document.all) {
hoursBlock.style.setExpression("width",
"now.getHours() * shortWidth * multiple","jscript")
hoursLabel.setExpression("innerHTML",
"now.getHours()","jscript")
minutesBlock.style.setExpression("width",
"now.getMinutes() * shortWidth","jscript")
minutesLabel.setExpression("innerHTML",
"now.getMinutes()","jscript")
secondsBlock.style.setExpression("width",
"now.getSeconds() * shortWidth","jscript")
secondsLabel.setExpression("innerHTML",
"now.getSeconds()","jscript")
}
updateClock()
} function updateClock() {
now = new Date()
document.recalc()
setTimeout("updateClock()",1000)
} function showExpr() {
alert("Expression for the \"Hours\" innerHTML property is:\r\n" +
document.all.hoursLabel.getExpression("innerHTML") + ".")
} </SCRIPT> </HEAD> <BODY onLoad="init()">
getExpression(), setExpression(), recalc() Methods
This clock uses Dynamic Properties to calculate bar width and time numbers:
| Hours: | |
|---|---|
| Minutes: | |
| Seconds: |
<FORM> <INPUT TYPE="button" VALUE="Show "Hours" number innerHTML Expression"
onClick="showExpr()"
</FORM> </BODY> </HTML>
</source>
Progress Bar 1
<source lang="html4strict">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/tr/xhtml1/DTD/xhtml1-transitional.dtd">
<html> <head> <title>Recipe 15.10</title> <style rel="stylesheet" id="mainStyle" type="text/css"> html {background-color:#cccccc} body {background-color:#eeeeee; font-family:Tahoma,Arial,Helvetica,sans-serif; font-size:12px;
margin-left:15%; margin-right:15%; border:3px groove darkred; padding:15px}
h1 {text-align:right; font-size:1.5em; font-weight:bold} h2 {text-align:left; font-size:1.1em; font-weight:bold; text-decoration:underline} .buttons {margin-top:10px} <style> <style type="text/css">
- progressBar {position:absolute;
width:400px;
height:35px;
visibility:hidden;
background-color:#99ccff;
padding:20px;
border-width:2px;
border-left-color:#9999ff;
border-top-color:#9999ff;
border-right-color:#666666;
border-bottom-color:#666666;
border-style:solid;
}
- progressBarMsg {position:absolute;
left:10px;
top:10px;
font:18px Verdana, Helvetica, sans-serif bold
}
- sliderWrapper {position:absolute;
left:10px;
top:40px;
width:417px;
height:15px;
background-color:#ffffff;
border:1px solid #000000;
text-align:center;
font-size:12px
}
- slider{position:absolute;
left:0px;
top:0px;
width:420px;
height:15px;
clip:rect(0px 0px 15px 0px);
background-color:#666699;
text-align:center;
color:#ffffff;
font-size:12px
}
</style> <script type="text/javascript"> /* *********************************************************** Example 4-3 (DHTMLAPI.js) "Dynamic HTML:The Definitive Reference" 2nd Edition by Danny Goodman Published by O"Reilly & Associates ISBN 1-56592-494-0 http://www.oreilly.ru Copyright 2002 Danny Goodman. All Rights Reserved.
- */
// DHTMLapi.js custom API for cross-platform // object positioning by Danny Goodman (http://www.dannyg.ru). // Release 2.0. Supports NN4, IE, and W3C DOMs. // Global variables var isCSS, isW3C, isIE4, isNN4, isIE6CSS; // Initialize upon load to let all browsers establish content objects function initDHTMLAPI() {
if (document.images) {
isCSS = (document.body && document.body.style) ? true : false;
isW3C = (isCSS && document.getElementById) ? true : false;
isIE4 = (isCSS && document.all) ? true : false;
isNN4 = (document.layers) ? true : false;
isIE6CSS = (document.rupatMode && document.rupatMode.indexOf("CSS1") >= 0) ? true : false;
}
} // Set event handler to initialize API window.onload = initDHTMLAPI; // Seek nested NN4 layer from string name function seekLayer(doc, name) {
var theObj;
for (var i = 0; i < doc.layers.length; i++) {
if (doc.layers[i].name == name) {
theObj = doc.layers[i];
break;
}
// dive into nested layers if necessary
if (doc.layers[i].document.layers.length > 0) {
theObj = seekLayer(document.layers[i].document, name);
}
}
return theObj;
} // Convert object name string or object reference // into a valid element object reference function getRawObject(obj) {
var theObj;
if (typeof obj == "string") {
if (isW3C) {
theObj = document.getElementById(obj);
} else if (isIE4) {
theObj = document.all(obj);
} else if (isNN4) {
theObj = seekLayer(document, obj);
}
} else {
// pass through object reference
theObj = obj;
}
return theObj;
} // Convert object name string or object reference // into a valid style (or NN4 layer) reference function getObject(obj) {
var theObj = getRawObject(obj);
if (theObj && isCSS) {
theObj = theObj.style;
}
return theObj;
} // Position an object at a specific pixel coordinate function shiftTo(obj, x, y) {
var theObj = getObject(obj);
if (theObj) {
if (isCSS) {
// equalize incorrect numeric value type
var units = (typeof theObj.left == "string") ? "px" : 0
theObj.left = x + units;
theObj.top = y + units;
} else if (isNN4) {
theObj.moveTo(x,y)
}
}
} // Move an object by x and/or y pixels function shiftBy(obj, deltaX, deltaY) {
var theObj = getObject(obj);
if (theObj) {
if (isCSS) {
// equalize incorrect numeric value type
var units = (typeof theObj.left == "string") ? "px" : 0
theObj.left = getObjectLeft(obj) + deltaX + units;
theObj.top = getObjectTop(obj) + deltaY + units;
} else if (isNN4) {
theObj.moveBy(deltaX, deltaY);
}
}
} // Set the z-order of an object function setZIndex(obj, zOrder) {
var theObj = getObject(obj);
if (theObj) {
theObj.zIndex = zOrder;
}
} // Set the background color of an object function setBGColor(obj, color) {
var theObj = getObject(obj);
if (theObj) {
if (isNN4) {
theObj.bgColor = color;
} else if (isCSS) {
theObj.backgroundColor = color;
}
}
} // Set the visibility of an object to visible function show(obj) {
var theObj = getObject(obj);
if (theObj) {
theObj.visibility = "visible";
}
} // Set the visibility of an object to hidden function hide(obj) {
var theObj = getObject(obj);
if (theObj) {
theObj.visibility = "hidden";
}
} // Retrieve the x coordinate of a positionable object function getObjectLeft(obj) {
var elem = getRawObject(obj);
var result = 0;
if (document.defaultView) {
var style = document.defaultView;
var cssDecl = style.getComputedStyle(elem, "");
result = cssDecl.getPropertyValue("left");
} else if (elem.currentStyle) {
result = elem.currentStyle.left;
} else if (elem.style) {
result = elem.style.left;
} else if (isNN4) {
result = elem.left;
}
return parseInt(result);
} // Retrieve the y coordinate of a positionable object function getObjectTop(obj) {
var elem = getRawObject(obj);
var result = 0;
if (document.defaultView) {
var style = document.defaultView;
var cssDecl = style.getComputedStyle(elem, "");
result = cssDecl.getPropertyValue("top");
} else if (elem.currentStyle) {
result = elem.currentStyle.top;
} else if (elem.style) {
result = elem.style.top;
} else if (isNN4) {
result = elem.top;
}
return parseInt(result);
} // Retrieve the rendered width of an element function getObjectWidth(obj) {
var elem = getRawObject(obj);
var result = 0;
if (elem.offsetWidth) {
result = elem.offsetWidth;
} else if (elem.clip && elem.clip.width) {
result = elem.clip.width;
} else if (elem.style && elem.style.pixelWidth) {
result = elem.style.pixelWidth;
}
return parseInt(result);
} // Retrieve the rendered height of an element function getObjectHeight(obj) {
var elem = getRawObject(obj);
var result = 0;
if (elem.offsetHeight) {
result = elem.offsetHeight;
} else if (elem.clip && elem.clip.height) {
result = elem.clip.height;
} else if (elem.style && elem.style.pixelHeight) {
result = elem.style.pixelHeight;
}
return parseInt(result);
} // Return the available content width space in browser window function getInsideWindowWidth() {
if (window.innerWidth) {
return window.innerWidth;
} else if (isIE6CSS) {
// measure the html element"s clientWidth
return document.body.parentElement.clientWidth
} else if (document.body && document.body.clientWidth) {
return document.body.clientWidth;
}
return 0;
} // Return the available content height space in browser window function getInsideWindowHeight() {
if (window.innerHeight) {
return window.innerHeight;
} else if (isIE6CSS) {
// measure the html element"s clientHeight
return document.body.parentElement.clientHeight
} else if (document.body && document.body.clientHeight) {
return document.body.clientHeight;
}
return 0;
}
</script> <script type="text/javascript"> // Center a positionable element whose name is passed as // a parameter in the current window/frame, and show it function centerOnWindow(elemID) {
// "obj" is the positionable object
var obj = getRawObject(elemID);
// window scroll factors
var scrollX = 0, scrollY = 0;
if (document.body && typeof document.body.scrollTop != "undefined") {
scrollX += document.body.scrollLeft;
scrollY += document.body.scrollTop;
if (document.body.parentNode &&
typeof document.body.parentNode.scrollTop != "undefined") {
scrollX += document.body.parentNode.scrollLeft;
scrollY += document.body.parentNode.scrollTop
}
} else if (typeof window.pageXOffset != "undefined") {
scrollX += window.pageXOffset;
scrollY += window.pageYOffset;
}
var x = Math.round((getInsideWindowWidth()/2) - (getObjectWidth(obj)/2)) + scrollX;
var y = Math.round((getInsideWindowHeight()/2) - (getObjectHeight(obj)/2)) + scrollY;
shiftTo(obj, x, y);
show(obj);
} function initProgressBar() {
// create quirks object whose default (CSS-compatible) values
// are zero; pertinent values for quirks mode filled in later
if (navigator.appName == "Microsoft Internet Explorer" &&
navigator.userAgent.indexOf("Win") != -1 &&
(typeof document.rupatMode == "undefined" ||
document.rupatMode == "BackCompat")) {
document.getElementById("progressBar").style.height = "81px";
document.getElementById("progressBar").style.width = "444px";
document.getElementById("sliderWrapper").style.fontSize = "xx-small";
document.getElementById("slider").style.fontSize = "xx-small";
document.getElementById("slider").style.height = "13px";
document.getElementById("slider").style.width = "415px";
}
} function showProgressBar() {
centerOnWindow("progressBar");
} function calcProgress(current, total) {
if (current <= total) {
var factor = current/total;
var pct = Math.ceil(factor * 100);
document.getElementById("sliderWrapper").firstChild.nodeValue = pct + "%";
document.getElementById("slider").firstChild.nodeValue = pct + "%";
document.getElementById("slider").style.clip = "rect(0px " + parseInt(factor * 417) + "px 16px 0px)";
}
} function hideProgressBar() {
hide("progressBar");
calcProgress(0, 0);
} // Test bench to see progress bar in action at random intervals var loopObject = {start:0, end:10, current:0, interval:null}; function runit() {
if (loopObject.current <= loopObject.end) {
calcProgress(loopObject.current, loopObject.end);
loopObject.current += Math.random();
loopObject.interval = setTimeout("runit()", 700);
} else {
calcProgress(loopObject.end, loopObject.end);
loopObject.current = 0;
loopObject.interval = null;
setTimeout("hideProgressBar()", 500);
}
} function test() {
showProgressBar(); runit();
} </script> </head> <body onload="initDHTMLAPI(); initProgressBar()">
Progress Bar
<button onclick="location.reload()">Reset</button> <button onclick="test()">Run Loop</button>
</body> </html>
</source>
