jsは写真の回転を実現します
23676 ワード
1、以下のコードはie 9バージョンを適用する.
jsコードは以下の通りです
jsコードは以下の通りです
転載先:https://www.cnblogs.com/henuyuxiang/p/10656415.html
jsコードは以下の通りです
function rotate(o,p){
var img = document.getElementById(o);
if(!img || !p) return false;
var n = img.getAttribute('step');
if(n== null) n=0;
if(p=='right'){
(n==3)? n=0:n++;
}else if(p=='left'){
(n==0)? n=3:n--;
}
img.setAttribute('step',n);
//MSIE
if(document.all) {
img.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ n +')';
//HACK FOR MSIE 8
switch(n){
case 0:
img.parentNode.style.height = img.height;
break;
case 1:
img.parentNode.style.height = img.width;
break;
case 2:
img.parentNode.style.height = img.height;
break;
case 3:
img.parentNode.style.height = img.width;
break;
}
//DOM
}else{
var c = document.getElementById('canvas_'+o);
if(c== null){
img.style.visibility = 'hidden';
img.style.position = 'absolute';
c = document.createElement('canvas');
c.setAttribute("id",'canvas_'+o);
img.parentNode.appendChild(c);
}
var canvasContext = c.getContext('2d');
switch(n) {
default :
case 0 :
c.setAttribute('width', img.width);
c.setAttribute('height', img.height);
canvasContext.rotate(0 * Math.PI / 180);
canvasContext.drawImage(img, 0, 0);
break;
case 1 :
c.setAttribute('width', img.height);
c.setAttribute('height', img.width);
canvasContext.rotate(90 * Math.PI / 180);
canvasContext.drawImage(img, 0, -img.height);
break;
case 2 :
c.setAttribute('width', img.width);
c.setAttribute('height', img.height);
canvasContext.rotate(180 * Math.PI / 180);
canvasContext.drawImage(img, -img.width, -img.height);
break;
case 3 :
c.setAttribute('width', img.height);
c.setAttribute('height', img.width);
canvasContext.rotate(270 * Math.PI / 180);
canvasContext.drawImage(img, -img.width, 0);
break;
}
}
} <div id="imgDiv" style="float: left;">
<img id="showImg" onclick="rotate('showImg','right')" style="width:100%; height:100%;" src="${ctx }/pwlp/supervise/supervise/getCaseImgTemplate.ht?id=${id }">
div>DOCTYPE html>
<html>
<head>
<title> title>
<script>
window.onload = function(){
var current = 0;
document.getElementById('showImg').onclick = function(){
current = (current+90)%360;
this.style.transform = 'rotate('+current+'deg)';
}
};
script>
head>
<body>
<img id ="showImg" src="">
body>jsコードは以下の通りです
window.onload = function(){
var current = 0;
document.getElementById('showImg').onclick = function(){
var browserVersion = myBrowser();
if(browserVersion == "IE9"){
rotate("showImg","right");
}else{
current = (current+90)%360;
this.style.transform = 'rotate('+current+'deg)';
}
}
};
function rotate(o,p){
var img = document.getElementById(o);
if(!img || !p) return false;
var n = img.getAttribute('step');
if(n== null) n=0;
if(p=='right'){
(n==3)? n=0:n++;
}else if(p=='left'){
(n==0)? n=3:n--;
}
img.setAttribute('step',n);
//MSIE
if(document.all) {
img.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ n +')';
//HACK FOR MSIE 8
switch(n){
case 0:
img.parentNode.style.height = img.height;
break;
case 1:
img.parentNode.style.height = img.width;
break;
case 2:
img.parentNode.style.height = img.height;
break;
case 3:
img.parentNode.style.height = img.width;
break;
}
//DOM
}else{
var c = document.getElementById('canvas_'+o);
if(c== null){
img.style.visibility = 'hidden';
img.style.position = 'absolute';
c = document.createElement('canvas');
c.setAttribute("id",'canvas_'+o);
img.parentNode.appendChild(c);
}
var canvasContext = c.getContext('2d');
switch(n) {
default :
case 0 :
c.setAttribute('width', img.width);
c.setAttribute('height', img.height);
canvasContext.rotate(0 * Math.PI / 180);
canvasContext.drawImage(img, 0, 0);
break;
case 1 :
c.setAttribute('width', img.height);
c.setAttribute('height', img.width);
canvasContext.rotate(90 * Math.PI / 180);
canvasContext.drawImage(img, 0, -img.height);
break;
case 2 :
c.setAttribute('width', img.width);
c.setAttribute('height', img.height);
canvasContext.rotate(180 * Math.PI / 180);
canvasContext.drawImage(img, -img.width, -img.height);
break;
case 3 :
c.setAttribute('width', img.height);
c.setAttribute('height', img.width);
canvasContext.rotate(270 * Math.PI / 180);
canvasContext.drawImage(img, -img.width, 0);
break;
}
}
}
function myBrowser(){
var userAgent = navigator.userAgent; // userAgent
var isOpera = userAgent.indexOf("Opera") > -1;
if (isOpera) {
return "Opera"
}; // Opera
if (userAgent.indexOf("Firefox") > -1) {
return "FF";
} // Firefox
if (userAgent.indexOf("Chrome") > -1){
return "Chrome";
}
if (userAgent.indexOf("Safari") > -1) {
return "Safari";
} // Safari
if (userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera) {
if (userAgent.indexOf("MSIE 6.0") > -1) { return "IE6"; }
if (userAgent.indexOf("MSIE 7.0") > -1) { return "IE7"; }
if (userAgent.indexOf("MSIE 8.0") > -1) { return "IE8"; }
if (userAgent.indexOf("MSIE 9.0") > -1) { return "IE9"; }
if (userAgent.indexOf("MSIE 10.0") > -1) { return "IE10"; }
return "IE";
} // IE6-9
if (userAgent.toLowerCase().indexOf("trident") > -1 && userAgent.indexOf("rv") > -1 && !isOpera) {
if (userAgent.indexOf("rv:10.0") > -1) { return "IE10"; }
if (userAgent.indexOf("rv:11.0") > -1) { return "IE11"; }
return "IE11";
} // IE10-11
else
{
return userAgent;
}
}<div id="imgDiv" style="float: left;">
<img id="showImg" style="width:100%; height:100%;" src="${ctx }/pwlp/supervise/supervise/getCaseImgTemplate.ht?id=${id }">
div>転載先:https://www.cnblogs.com/henuyuxiang/p/10656415.html