Home > Developer > JavaScript

Find a magnifier for the map

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

<Html>

<Head> <meta http-equiv = "Content-Type" content = "text/html; charset = gb2312 "> <title> webpage special effects | www.jscode.cn | --- add a magnifier to the Map </title> <SCRIPT> var shrinkfactor = 5 // left and top position of the thumbnailimage // (distance to the left and top browser-margin, pixels) var thumbleft = 30var thumbtop = 30 // left and top position of the zoomed image // (distance to the left and top browser-margin, pixels) var largel Eft = 300var largetop = 30 // width and height of the enlarged image's sector (visible part, pixels) var clipwidth = 240var clipheight = 160 </SCRIPT> <SCRIPT> var isNav, isIEvar offsetX, offsetYvar selectedObj var largewidth = 0var largeheight = 0 var thumbwidth = Math. floor (largewidth/shrinkfactor) var thumbheight = Math. floor (largeheight/shrinkfactor) var dragimgwidth = Math. floor (clipwidth/shrinkf Actor) var dragimgheight = Math. floor (clipheight/shrinkfactor) var dragimgleft = far + 3var dragimgtop = far + 3 var difleft = Small-margin diftop = largetop-margin var variable var cliptop = 0var clipbottom = cliptop + empty clipleft = 0var clipright = clipleft + clipwidth if (parseInt (navigator. appVersion)> = 4) {if (navigator. appName = "Netscape") {isNav = true} else {isIE = true}} Function setZIndex (obj, zOrder) {obj. zIndex = zOrder} function shiftTo (obj, x, y) {if (isNav) {if (x <= document. thumb. left) {x = document. thumb. left} if (x> = (document. thumb. left + thumbwidth-dragimgwidth-2) {x = document. thumb. left + thumbwidth-dragimgwidth-2} if (y <= document. thumb. top) {y = document. thumb. top} if (y> = (document. thumb. top + thumbheight-dragimgheight-2) {y = document. thumb. top + thumbheight-dragimghei Ght-2} (obj. moveTo (x, y)} else {if (x <= document. all. thumb. style. posLeft) {x = document. all. thumb. style. posLeft} if (x> = (document. all. thumb. style. posLeft + thumbwidth-dragimgwidth-2) {x = document. all. thumb. style. posLeft + thumbwidth-dragimgwidth-2} if (y <= document. all. thumb. style. posTop) {y = document. all. thumb. style. posTop} if (y> = (document. all. thumb. style. posTop + thumbheight-dragimgheight-2) {y = document. all. thumb. Style. posTop + thumbheight-dragimgheight-2} obj. pixelLeft = xobj. pixelTop = y} cliptop = (y-thumbtop) * cursor = cliptop + clipheightclipleft = (x-thumbleft) * shrinkfactorclipright = clipleft + clipwidth if (document. all) {clippoints = "rect (" + cliptop + "" + clipright + "" + clipbottom + "" + clipleft + ")" document. all. large. style. posTop = largetop-cliptopdocument.all.large.style.posLeft = largeleft-clipleft Document. all. large. style. clip = clippoints} if (document. layers) {document. large. top = largetop-cliptopdocument.large.left = largeleft-clipleftdocument.large.clip.left = clipleftdocument. large. clip. right = cliprightdocument. large. clip. top = cliptopdocument. large. clip. bottom = clipbottom} function setSelectedElem (evt) {if (isNav) {var testObjvar clickX = evt. pageXvar clickY = evt. pageYfor (var I = docume Nt. layers. length-1; I> = 0; I --) {testObj = document. layers [I] if (clickX> testObj. left) & (clickX <testObj. left + testObj. clip. width) & (clickY> testObj. top) & (clickY <testObj. top + testObj. clip. height & document. layers [I]. id = "dragimg") {selectedObj = testObjsetZIndex (selectedObj, 100) return }} else {var imgObj = window. event. srcElementif (imgObj. parentElement. id. indexOf ("dragimg ")! =-1) {selectedObj = imgObj. parentElement. stylesetZIndex (selectedObj, 100) return }} selectedObj = nullreturn} function dragIt (evt) {if (selectedObj) {if (isNav) {shiftTo (selectedObj, (evt. pageX-offsetX), (evt. pageY-offsetY)} else {shiftTo (selectedObj, (window. event. clientX-offsetX), (window. event. clientY-offsetY) return false }}} function engage (evt) {setSelectedElem (evt) if (selectedObj) {if (isNav) {offsetX = evt. pageX-selectedObj. leftoffsetY = evt. pageY-selectedObj. top} else {offsetX = window. event. offsetXoffsetY = window. event. offsetY} return false} function release (evt) {if (selectedObj) {setZIndex (selectedObj, 0) selectedObj = null} function setNavEventCapture () {if (isNav) {document. captureEvents (Event. MOUSEDOWN | Event. MOUSEMOVE | Event. MOUSEUP)} function init () {if (document. layers) {var imageurl1_document.large.doc ument. largepic. src largewidth+document.large.document.widthlargeheight?document.large.doc ument. heightthumbwidth = Math. floor (largewidth/shrinkfactor) thumbheight = Math. floor (largeheight/shrinkfactor) document.thumb.doc ument. write ("

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More