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UX improvements #32

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357 changes: 178 additions & 179 deletions jquery.zoom.js
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Original file line number Diff line number Diff line change
@@ -1,183 +1,182 @@
/*!
Zoom v1.7.6 - 2013-06-24
Enlarge images on click or mouseover.
(c) 2013 Jack Moore - http://www.jacklmoore.com/zoom
license: http://www.opensource.org/licenses/mit-license.php
Zoom v1.7.7 - 2013-07-09 - Enlarge images on click or mouseover
MIT License (c) 2013 Jack Moore www.jacklmoore.com/zoom
*/
(function ($) {
var defaults = {
url: false,
callback: false,
target: false,
duration: 120,
on: 'mouseover', // other options: 'grab', 'click', 'toggle'
onZoomIn: false,
onZoomOut: false
};

// Core Zoom Logic, independent of event listeners.
$.zoom = function(target, source, img) {
var outerWidth,
outerHeight,
xRatio,
yRatio,
offset,
position = $(target).css('position');

// The parent element needs positioning so that the zoomed element can be correctly positioned within.
$(target).css({
position: /(absolute|fixed)/.test(position) ? position : 'relative',
overflow: 'hidden'
});

img.style.width = img.style.height = '';

$(img)
.addClass('zoomImg')
.css({
position: 'absolute',
top: 0,
left: 0,
opacity: 0,
width: img.width,
height: img.height,
border: 'none',
maxWidth: 'none'
})
.appendTo(target);

return {
init: function() {
outerWidth = $(target).outerWidth();
outerHeight = $(target).outerHeight();
xRatio = (img.width - outerWidth) / $(source).outerWidth();
yRatio = (img.height - outerHeight) / $(source).outerHeight();
offset = $(source).offset();
},
move: function (e) {
var left = (e.pageX - offset.left),
top = (e.pageY - offset.top);

top = Math.max(Math.min(top, outerHeight), 0);
left = Math.max(Math.min(left, outerWidth), 0);

img.style.left = (left * -xRatio) + 'px';
img.style.top = (top * -yRatio) + 'px';
}
};
};

$.fn.zoom = function (options) {
return this.each(function () {
var
settings = $.extend({}, defaults, options || {}),
//target will display the zoomed image
target = settings.target || this,
//source will provide zoom location info (thumbnail)
source = this,
img = document.createElement('img'),
$img = $(img),
mousemove = 'mousemove.zoom',
clicked = false;

// If a url wasn't specified, look for an image element.
if (!settings.url) {
settings.url = $(source).find('img').attr('src');
if (!settings.url) {
return;
}
}

img.onload = function () {
var zoom = $.zoom(target, source, img);

function start(e) {
zoom.init();
zoom.move(e);

// Skip the fade-in for IE8 and lower since it chokes on fading-in
// and changing position based on mousemovement at the same time.
$img.stop()
.fadeTo($.support.opacity ? settings.duration : 0, 1, $.isFunction(settings.onZoomIn) ? settings.onZoomIn.call(img) : false);
}

function stop() {
$img.stop()
.fadeTo(settings.duration, 0, $.isFunction(settings.onZoomOut) ? settings.onZoomOut.call(img) : false);
}

if (settings.on === 'grab') {
$(source).on('mousedown.zoom',
function (e) {
$(document).one('mouseup.zoom',
function () {
stop();

$(document).off(mousemove, zoom.move);
}
);

start(e);

$(document).on(mousemove, zoom.move);

e.preventDefault();
}
);
} else if (settings.on === 'click') {
$(source).on('click.zoom',
function (e) {
if (clicked) {
// bubble the event up to the document to trigger the unbind.
return;
} else {
clicked = true;
start(e);
$(document).on(mousemove, zoom.move);
$(document).one('click.zoom',
function () {
stop();
clicked = false;
$(document).off(mousemove, zoom.move);
}
);
return false;
}
}
);
} else if (settings.on === 'toggle') {
$(source).on('click.zoom',
function (e) {
if (clicked) {
stop();
} else {
start(e);
}
clicked = !clicked;
}
);
} else {
zoom.init(); // Preemptively call init because IE7 will fire the mousemove handler before the hover handler.

$(source)
.on('mouseenter.zoom', start)
.on('mouseleave.zoom', stop)
.on(mousemove, zoom.move);
}

if ($.isFunction(settings.callback)) {
settings.callback.call(img);
}
};

img.src = settings.url;

$(source).one('zoom.destroy', function(){
$(source).off(".zoom");
$img.remove();
});
});
};

$.fn.zoom.defaults = defaults;
var defaults = {
url: false,
callback: false,
target: false,
duration: 120,
on: 'mouseover', // other options: 'grab', 'click', 'toggle'
onZoomIn: false,
onZoomOut: false
};

// Core Zoom Logic, independent of event listeners.
$.zoom = function(target, source, img) {
var outerWidth,
outerHeight,
xRatio,
yRatio,
offset,
position = $(target).css('position');

// The parent element needs positioning so that the zoomed element can be correctly positioned within.
$(target).css({
position: /(absolute|fixed)/.test(position) ? position : 'relative',
overflow: 'hidden'
});

img.style.width = img.style.height = '';

$(img)
.addClass('zoomImg')
.css({
position: 'absolute',
'z-index': 9999,
top: 0,
left: 0,
opacity: 0,
width: img.width,
maxWidth: 'none',
height: img.height,
border: 'none'
})
.appendTo(target);

return {
init: function() {
outerWidth = $(target).outerWidth();
outerHeight = $(target).outerHeight();
xRatio = (img.width - outerWidth) / $(source).outerWidth();
yRatio = (img.height - outerHeight) / $(source).outerHeight();
offset = $(source).offset();
},
move: function (e) {
var left = (e.pageX - offset.left),
top = (e.pageY - offset.top);

top = Math.max(Math.min(top, outerHeight), 0);
left = Math.max(Math.min(left, outerWidth), 0);

img.style.left = (left * -xRatio) + 'px';
img.style.top = (top * -yRatio) + 'px';
}
};
};

$.fn.zoom = function (options) {
return this.each(function () {
var
settings = $.extend({}, defaults, options || {}),
//target will display the zoomed image
target = settings.target || this,
//source will provide zoom location info (thumbnail)
source = this,
img = document.createElement('img'),
$img = $(img),
mousemove = 'mousemove.zoom',
clicked = false;

// If a url wasn't specified, look for an image element.
if (!settings.url) {
settings.url = $(source).attr('href'); //$(source).find('img').attr('src');
if (!settings.url) {
return;
}
}

img.onload = function () {
var zoom = $.zoom(target, source, img);

function start(e) {
zoom.init();
zoom.move(e);

// Skip the fade-in for IE8 and lower since it chokes on fading-in
// and changing position based on mousemovement at the same time.
$img.stop()
.fadeTo($.support.opacity ? settings.duration : 0, 1, $.isFunction(settings.onZoomIn) ? settings.onZoomIn.call(img) : false);
}

function stop() {
$img.stop()
.fadeTo(settings.duration, 0, $.isFunction(settings.onZoomOut) ? settings.onZoomOut.call(img) : false);
}

if (settings.on === 'grab') {
$(source).on('mousedown.zoom',
function (e) {
$(document).one('mouseup.zoom',
function () {
stop();

$(document).off(mousemove, zoom.move);
}
);

start(e);

$(document).on(mousemove, zoom.move);

e.preventDefault();
}
);
} else if (settings.on === 'click') {
$(source).on('click.zoom',
function (e) {
if (clicked) {
// bubble the event up to the document to trigger the unbind.
return;
} else {
clicked = true;
start(e);
$(document).on(mousemove, zoom.move);
$(document).one('click.zoom',
function () {
stop();
clicked = false;
$(document).off(mousemove, zoom.move);
}
);
return false;
}
}
);
} else if (settings.on === 'toggle') {
$(source).on('click.zoom',
function (e) {
if (clicked) {
stop();
} else {
start(e);
}
clicked = !clicked;
}
);
} else {
zoom.init(); // Preemptively call init because IE7 will fire the mousemove handler before the hover handler.

$(source)
.on('mouseover.zoom', start)
.on('mouseleave.zoom', stop)
.on(mousemove, zoom.move);
}

if ($.isFunction(settings.callback)) {
settings.callback.call(img);
}
};

img.src = settings.url;

$(source).one('zoom.destroy', function(){
$(source).off(".zoom");
$img.remove();
});
});
};

$.fn.zoom.defaults = defaults;
}(window.jQuery));