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Image Zoom
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// ==UserScript== | |
// @name WheelZoom | |
// @namespace http://oerpli.github.io/ | |
// @version 0.1 | |
// @description Right Click + Mouse wheel to change image size, Right Click + Middle Click to reset current image | |
// @author oerpli | |
// @match http://*/* | |
// @match https://*/* | |
// @grant none | |
// @require http://code.jquery.com/jquery-3.2.1.slim.min.js | |
// ==/UserScript== | |
(function() { | |
//sdfsdf 'use strict'; | |
var currentlyActive = false; | |
var usedZoom = false; | |
var zoomElement = null; | |
var timeout; | |
var clicker = $('img'); | |
clicker.on('mousedown',function(e){ | |
if(e.which == 3){ | |
timeout = setInterval(function(){ | |
currentlyActive = true; | |
zoomElement = $(this); | |
}, 100); | |
} | |
return false; | |
}); | |
$(document).mouseup(function(e){ | |
clearInterval(timeout); | |
currentlyActive = false; | |
if(usedZoom){ | |
e.preventDefault(); | |
usedZoom = false; | |
} | |
return false; | |
}); | |
$("img").on('mousedown', function(e) { | |
if(e.which == 3){ // right click | |
e.preventDefault(); | |
this.addEventListener("mousewheel", ZoomElement, false); | |
if (!$(this).attr('origw')){ | |
$(this).attr('origw',$(this).width()); | |
$(this).attr('origh',$(this).height()); | |
} | |
return false; | |
} | |
if(e.which == 2){ // middle click = reset to default | |
if($(this).attr('origw')){ | |
e.preventDefault(); | |
$(this).height($(this).attr('origh')); | |
$(this).width($(this).attr('origw')); | |
$(this).attr('origw',''); | |
return false; | |
} | |
} | |
}); | |
function ZoomElement(e, x){ | |
if(!currentlyActive) return; | |
usedZoom = true; | |
var e = window.event || e; | |
e.preventDefault(); | |
var delta = Math.max(-1, Math.min(1, (e.wheelDelta || -e.detail))); | |
//scrolling down? | |
if(delta > 0) | |
ratio = 1.1; | |
else | |
ratio = 1.0/1.1; | |
newHeight = Math.floor($(this).height() * ratio); | |
newWidth = Math.floor($(this).width() * ratio); | |
$(this).height(newHeight); | |
$(this).width(newWidth); | |
return false; | |
} | |
function MouseWheelHandler() { | |
return function (e) { | |
// cross-browser wheel delta | |
var e = window.event || e; | |
var delta = Math.max(-1, Math.min(1, (e.wheelDelta || -e.detail))); | |
//scrolling down? | |
if (delta < 0) { | |
return -1; | |
} else { | |
return +1; | |
} | |
return 0; | |
} | |
} | |
})(); |
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