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Add noScroll flag and align an image to the center of the window. #72

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Add noScroll flag and align an image to the center of the window. #72

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22 changes: 20 additions & 2 deletions intense.js
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,9 @@ var Intense = (function() {

// Overflow variable before screen is locked.
var overflowValue;


// if the image size is smaller than the browser window size.
var noScroll = false;
var active = false;

/* -------------------------
Expand Down Expand Up @@ -266,6 +268,7 @@ var Intense = (function() {
stop();
document.body.removeChild(container);
active = false;
noScroll = false;
setState(false);
}

Expand All @@ -276,6 +279,13 @@ var Intense = (function() {
target.height = imageDimensions.h;
horizontalOrientation = imageDimensions.fit;

// check sourceimage dimensions and if are smaller than the window sizes, set the target size is source size;
if ( window.innerWidth > sourceDimensions.w && window.innerHeight > sourceDimensions.h ) {
target.width = sourceDimensions.w;
target.height = sourceDimensions.h;
noScroll = true;
}

targetDimensions = { w: target.width, h: target.height };
containerDimensions = { w: window.innerWidth, h: window.innerHeight };
overflowArea = {
Expand Down Expand Up @@ -353,7 +363,15 @@ var Intense = (function() {
if (horizontalOrientation === true) {
// HORIZONTAL SCANNING
currentPosition += mouse.xCurr - currentPosition;
if (mouse.xCurr !== lastPosition) {

if (noScroll) { // if noScroll is TRUE, Centering the image.
position = containerDimensions.w/2 - targetDimensions.w/2;
var targetY = containerDimensions.h/2 - targetDimensions.h/2;
target.style["webkitTransform"] = "translate(" + position + "px, " + targetY +"px)";
target.style["MozTransform"] = "translate(" + position + "px, " + targetY +"px)";
target.style["msTransform"] = "translate(" + position + "px, " + targetY +"px)";
lastPosition = mouse.xCurr;
} else if (mouse.xCurr !== lastPosition) {
var position = parseFloat(
calcPosition(currentPosition, containerDimensions.w)
);
Expand Down