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[原创]JavaScript模拟ACDSEE简单功能

摘要: [原创]JavaScript模拟ACDSEE简单功能

简单的放大缩小，显示坐标功能。
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演示代码：
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Document </TITLE>
<style type="text/css">
body{
padding : 0px ;
margin : 0px;
background-color : #999999 ;

}
.DivMain {
position : absolute ;
text-align : center ;
overflow : hidden ;
}
.DivMenu {
position : absolute ;
text-align : left ;
overflow : hidden ;
}
.ImgMain {
position : absolute ;
overflow : hidden ;
border : 0px ;
}
.TBMain {
background-color : #CCCCCC ;
padding : 0px ;
border : 0px ;
z-index : 99 ;
line-height : 18px ;

}
.TBMenu {
background-color : #FFCCCC ;
padding : 0px ;
border : 0px ;
z-index : 99 ;
color: #000000 ;

}
.HrScroll {
margin : 0px;
background-color : #FFFFFF ;
padding : 0px ;
border : 0px ;
z-index : 99 ;
color : #000000 ;
border-spacing : 0px;
width : 160px ;
height : 10px ;
}
</style>

<SCRIPT LANGUAGE="JavaScript">
<!--

var originalWidth ;
var originalHeight ;

var objDivMain ;
var objTbMain ;

var objImg ;
var ObjDrag ;

var objDivMenu ;
var objTbMemu ;

var objbtnImgInfo ;

var objDivFlag;
var objHrScroll;

var oRcts ;
var oTextRange ;

function setInit(obj) {

objDivMain = document.getElementById("divMain") ;
objTbMain = document.getElementById("TbMain") ;

objDivMenu = document.getElementById("DivMenu") ;
objTbMenu = document.getElementById("TbMenu") ;

objImg = document.getElementById("imgMain") ;
objbtnImgInfo = document.getElementById("btnImgInfo") ;

objDivFlag = document.getElementById("DivFlag");
objHrScroll = document.getElementById("HrScroll");

originalWidth = obj.width;
originalHeight = obj.height;

objImg.style.width = originalWidth;
objImg.style.height = originalHeight;

fmImgZoom.FitScreen.click();
}

function setFitScreen() {

initImg(objImg);
}

function setOriginal() {

var intBodyWidth ;
var intBodyHeight ;

intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ;

objImg.style.left = 0 ;
objImg.style.top = 0 ;
objImg.style.width = originalWidth;
objImg.style.height = originalHeight;
objImg.style.zoom = 1 ;

objDivMain.style.width = intBodyWidth ;
objDivMain.style.height = intBodyHeight - objTbMain.clientHeight;

fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}

function initImg(objCurrent) {

var intBodyWidth ;
var intBodyHeight ;

intBodyWidth = document.body.clientWidth ;
intBodyHeight = document.body.clientHeight ;

objTbMain.style.top = 0;
objTbMain.style.height = 20;
objTbMain.style.width = intBodyWidth;

objDivMain.style.left = 0 ;
objDivMain.style.height = intBodyHeight - objTbMain.clientHeight;
objDivMain.style.width = intBodyWidth ;

initZoom(objCurrent);
}

function initZoom(obj){

var intObjWidth ;
var intObjHeight ;
var intDivHeight ;
var intZoomRatio ;

intDivHeight = objDivMain.style.pixelHeight;
intObjHeight = obj.style.pixelHeight;
intZoomRatio = intDivHeight / intObjHeight;

obj.style.zoom = intZoomRatio ;
obj.style.top = 0;
obj.style.left = 0;

fnWritePos (obj.style.left,obj.style.top,obj.style.zoom) ;
}

function fnMouseDown(obj) {
ObjDrag=obj;
ObjDrag.setCapture();
ObjDrag.l=event.x-ObjDrag.style.pixelLeft;
ObjDrag.t=event.y-ObjDrag.style.pixelTop;
}

function fnMouseMove() {
if(ObjDrag!=null) {
  ObjDrag.style.left = event.x-ObjDrag.l;
  ObjDrag.style.top = event.y-ObjDrag.t;
  fnWritePos(ObjDrag.style.left,ObjDrag.style.top,ObjDrag.style.zoom);
}
}

function fnMouseUp() {
if(ObjDrag!=null) {
ObjDrag.releaseCapture();
ObjDrag=null;
}
}

function fnZoomIn() {

objImg.style.zoom = parseFloat(objImg.style.zoom) + 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}

function fnZoomOut() {

if(objImg.style.zoom>0.01){
objImg.style.zoom = parseFloat(objImg.style.zoom) - 0.01 ;
fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}
}

function fnDivMouseDown() {
if ( event.button == 2 && event.srcElement.id != "imgMain") {
  objDivMenu.style.top = event.y;
  objDivMenu.style.left = event.x;
  objDivMenu.style.visibility = "";

  oTextRange = objHrScroll.createTextRange() ;
  oRcts = oTextRange.getClientRects();
  oBndRct = objDivFlag.getBoundingClientRect();

  objDivFlag.style.top = oRcts[0].top;
  objDivFlag.style.left = oRcts[0].left + parseInt(objImg.style.zoom * 10) ;
  objDivFlag.style.visibility = "";

}
if ( event.button == 1 && event.srcElement.id != "imgMain") {
objDivMenu.style.visibility = "hidden";
objDivFlag.style.visibility = "hidden";
}
}

function fnWritePos(intLeft,intTop,intZoom) {
objbtnImgInfo.innerText = " ImgLeft:" + intLeft + " ImgTop:" + intTop + " ImgZoom:" + intZoom ;
}

function fnSlipMouseDown(obj) {
ObjDrag=obj;
ObjDrag.setCapture();
ObjDrag.l = event.x - ObjDrag.style.pixelLeft;
ObjDrag.t = ObjDrag.style.pixelTop;
}

function fnSlipMouseMove() {
if(ObjDrag!=null) {

  if(event.x >= oRcts[0].left && event.x <= oRcts[0].right ){
   ObjDrag.style.left = event.x - objDivFlag.offsetWidth / 2;
  }

  ObjDrag.t = ObjDrag.style.pixelTop;
  var intCurrentPos = ObjDrag.style.pixelLeft - oRcts[0].left + objDivFlag.offsetWidth / 2;
  var intPicZoom = intCurrentPos / 10;
  objImg.style.zoom = intPicZoom;
  fnWritePos(objImg.style.left,objImg.style.top,objImg.style.zoom);
}
}

function fnSlipMouseUp() {
if(ObjDrag!=null) {
ObjDrag.releaseCapture();
ObjDrag=null;
}
}

function setDisplay() {

if(objImg.style.visibility == ""){
objImg.style.visibility = "hidden";
}
else{
objImg.style.visibility = "";
}
}

function fnContextMenu() {
window.event.returnValue=false;
}
//-->
</SCRIPT>
</HEAD>

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