Perkins Brailler

Description

Manual machine used in typing Braille script.

* {box-sizing: border-box;}

.img-zoom-container {
position: relative;
}

.img-zoom-lens {
position: absolute;
border: 1px solid #d4d4d4;
/*set the size of the lens:*/
width: 40px;
height: 40px;
}

.img-zoom-result {
border: 1px solid #d4d4d4;
/*set the size of the result div:*/
width: 300px;
height: 300px;
}

function imageZoom(imgID, resultID) {
var img, lens, result, cx, cy;
img = document.getElementById(imgID);
result = document.getElementById(resultID);
/* Create lens: */
lens = document.createElement(“DIV”);
lens.setAttribute(“class”, “img-zoom-lens”);
/* Insert lens: */
img.parentElement.insertBefore(lens, img);
/* Calculate the ratio between result DIV and lens: */
cx = result.offsetWidth / lens.offsetWidth;
cy = result.offsetHeight / lens.offsetHeight;
/* Set background properties for the result DIV */
result.style.backgroundImage = “url(‘” + img.src + “‘)”;
result.style.backgroundSize = (img.width * cx) + “px ” + (img.height * cy) + “px”;
/* Execute a function when someone moves the cursor over the image, or the lens: */
lens.addEventListener(“mousemove”, moveLens);
img.addEventListener(“mousemove”, moveLens);
/* And also for touch screens: */
lens.addEventListener(“touchmove”, moveLens);
img.addEventListener(“touchmove”, moveLens);
function moveLens(e) {
var pos, x, y;
/* Prevent any other actions that may occur when moving over the image */
e.preventDefault();
/* Get the cursor’s x and y positions: */
pos = getCursorPos(e);
/* Calculate the position of the lens: */
x = pos.x – (lens.offsetWidth / 2);
y = pos.y – (lens.offsetHeight / 2);
/* Prevent the lens from being positioned outside the image: */
if (x > img.width – lens.offsetWidth) {x = img.width – lens.offsetWidth;}
if (x < 0) {x = 0;} if (y > img.height – lens.offsetHeight) {y = img.height – lens.offsetHeight;}
if (y < 0) {y = 0;} /* Set the position of the lens: */ lens.style.left = x + "px"; lens.style.top = y + "px"; /* Display what the lens "sees": */ result.style.backgroundPosition = "-" + (x * cx) + "px -" + (y * cy) + "px"; } function getCursorPos(e) { var a, x = 0, y = 0; e = e || window.event; /* Get the x and y positions of the image: */ a = img.getBoundingClientRect(); /* Calculate the cursor's x and y coordinates, relative to the image: */ x = e.pageX - a.left; y = e.pageY - a.top; /* Consider any page scrolling: */ x = x - window.pageXOffset; y = y - window.pageYOffset; return {x : x, y : y}; } }