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| /* Tout JavaScript présent ici sera exécuté par tous les utilisateurs à chaque chargement de page. */ | | /* Tout JavaScript présent ici sera exécuté par tous les utilisateurs à chaque chargement de page. */ |
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| (function magnify(imgID, zoom) {
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| var img, glass, w, h, bw;
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| img = document.getElementById(imgID);
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| /*create magnifier glass:*/
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| glass = document.createElement("DIV");
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| glass.setAttribute("class", "img-magnifier-glass");
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| /*insert magnifier glass:*/
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| img.parentElement.insertBefore(glass, img);
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| /*set background properties for the magnifier glass:*/
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| glass.style.backgroundImage = "url('" + img.src + "')";
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| glass.style.backgroundRepeat = "no-repeat";
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| glass.style.backgroundSize = (img.width * zoom) + "px " + (img.height * zoom) + "px";
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| bw = 3;
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| w = glass.offsetWidth / 2;
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| h = glass.offsetHeight / 2;
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| /*execute a function when someone moves the magnifier glass over the image:*/
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| glass.addEventListener("mousemove", moveMagnifier);
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| img.addEventListener("mousemove", moveMagnifier);
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| /*and also for touch screens:*/
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| glass.addEventListener("touchmove", moveMagnifier);
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| img.addEventListener("touchmove", moveMagnifier);
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| function moveMagnifier(e) {
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| var pos, x, y;
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| /*prevent any other actions that may occur when moving over the image*/
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| e.preventDefault();
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| /*get the cursor's x and y positions:*/
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| pos = getCursorPos(e);
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| x = pos.x;
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| y = pos.y;
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| /*prevent the magnifier glass from being positioned outside the image:*/
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| if (x > img.width - (w / zoom)) {x = img.width - (w / zoom);}
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| if (x < w / zoom) {x = w / zoom;}
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| if (y > img.height - (h / zoom)) {y = img.height - (h / zoom);}
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| if (y < h / zoom) {y = h / zoom;}
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| /*set the position of the magnifier glass:*/
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| glass.style.left = (x - w) + "px";
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| glass.style.top = (y - h) + "px";
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| /*display what the magnifier glass "sees":*/
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| glass.style.backgroundPosition = "-" + ((x * zoom) - w + bw) + "px -" + ((y * zoom) - h + bw) + "px";
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| }
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| function getCursorPos(e) {
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| var a, x = 0, y = 0;
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| e = e || window.event;
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| /*get the x and y positions of the image:*/
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| a = img.getBoundingClientRect();
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| /*calculate the cursor's x and y coordinates, relative to the image:*/
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| x = e.pageX - a.left;
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| y = e.pageY - a.top;
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| /*consider any page scrolling:*/
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| x = x - window.pageXOffset;
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| y = y - window.pageYOffset;
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| return {x : x, y : y};
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| }
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| }());
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