129 lines
4.7 KiB
JavaScript
129 lines
4.7 KiB
JavaScript
(function($){
|
|
|
|
$.fn.twentytwenty = function(options) {
|
|
var options = $.extend({
|
|
default_offset_pct: 0.5,
|
|
orientation: 'horizontal',
|
|
slider_move: "drag" //"drag" or "mousemove"
|
|
}, options);
|
|
return this.each(function() {
|
|
|
|
var sliderPct = options.default_offset_pct;
|
|
var container = $(this);
|
|
var sliderOrientation = options.orientation;
|
|
var beforeDirection = (sliderOrientation === 'vertical') ? 'down' : 'left';
|
|
var afterDirection = (sliderOrientation === 'vertical') ? 'up' : 'right';
|
|
|
|
|
|
container.wrap("<div class='twentytwenty-wrapper twentytwenty-" + sliderOrientation + "'></div>");
|
|
container.append("<div class='twentytwenty-overlay'></div>");
|
|
var beforeImg = container.find("img:first");
|
|
var afterImg = container.find("img:last");
|
|
container.append("<div class='twentytwenty-handle'></div>");
|
|
var slider = container.find(".twentytwenty-handle");
|
|
slider.append("<span class='twentytwenty-" + beforeDirection + "-arrow'></span>");
|
|
slider.append("<span class='twentytwenty-" + afterDirection + "-arrow'></span>");
|
|
container.addClass("twentytwenty-container");
|
|
beforeImg.addClass("twentytwenty-before");
|
|
afterImg.addClass("twentytwenty-after");
|
|
|
|
var overlay = container.find(".twentytwenty-overlay");
|
|
overlay.append("<div class='twentytwenty-before-label'></div>");
|
|
overlay.append("<div class='twentytwenty-after-label'></div>");
|
|
|
|
var beforeLabel = container.find("div.twentytwenty-before-label");
|
|
var afterLabel = container.find("div.twentytwenty-after-label");
|
|
|
|
var calcOffset = function(dimensionPct) {
|
|
var w = beforeImg.width();
|
|
var h = beforeImg.height();
|
|
return {
|
|
w: w+"px",
|
|
h: h+"px",
|
|
cw: (dimensionPct*w)+"px",
|
|
ch: (dimensionPct*h)+"px",
|
|
};
|
|
};
|
|
|
|
var adjustContainer = function(offset) {
|
|
if (sliderOrientation === 'vertical') {
|
|
beforeImg.css("clip", "rect(0,"+offset.w+","+offset.ch+",0)");
|
|
|
|
}
|
|
else {
|
|
beforeImg.css("clip", "rect(0,"+offset.cw+","+offset.h+",0)");
|
|
beforeLabel.css("clip", "rect(0,"+offset.cw+","+offset.h+",0)");
|
|
afterLabel.css("clip", "rect(0,"+offset.w+","+offset.h+","+offset.cw+")"); //clip: rect(0px, 700px, 1000px, 600px);
|
|
}
|
|
container.css("height", offset.h);
|
|
};
|
|
|
|
var adjustSlider = function(pct) {
|
|
var offset = calcOffset(pct);
|
|
slider.css((sliderOrientation==="vertical") ? "top" : "left", (sliderOrientation==="vertical") ? offset.ch : offset.cw);
|
|
adjustContainer(offset);
|
|
}
|
|
|
|
$(window).on("resize.twentytwenty", function(e) {
|
|
adjustSlider(sliderPct);
|
|
});
|
|
|
|
var offsetX = 0;
|
|
var imgWidth = 0;
|
|
|
|
if(options.slider_move == "drag") {
|
|
slider.on("movestart", function(e) {
|
|
if (((e.distX > e.distY && e.distX < -e.distY) || (e.distX < e.distY && e.distX > -e.distY)) && sliderOrientation !== 'vertical') {
|
|
e.preventDefault();
|
|
}
|
|
else if (((e.distX < e.distY && e.distX < -e.distY) || (e.distX > e.distY && e.distX > -e.distY)) && sliderOrientation === 'vertical') {
|
|
e.preventDefault();
|
|
}
|
|
container.addClass("active");
|
|
offsetX = container.offset().left;
|
|
offsetY = container.offset().top;
|
|
imgWidth = beforeImg.width();
|
|
imgHeight = beforeImg.height();
|
|
});
|
|
|
|
slider.on("moveend", function(e) {
|
|
container.removeClass("active");
|
|
});
|
|
|
|
slider.on("move", function(e) {
|
|
if (container.hasClass("active")) {
|
|
sliderPct = (sliderOrientation === 'vertical') ? (e.pageY-offsetY)/imgHeight : (e.pageX-offsetX)/imgWidth;
|
|
if (sliderPct < 0) {
|
|
sliderPct = 0;
|
|
}
|
|
if (sliderPct > 1) {
|
|
sliderPct = 1;
|
|
}
|
|
adjustSlider(sliderPct);
|
|
}
|
|
});
|
|
} else {
|
|
container.mousemove(function(e) {
|
|
sliderPct = (sliderOrientation === 'vertical')
|
|
? (e.pageY-container.offset().top)/beforeImg.height()
|
|
: (e.pageX-container.offset().left)/beforeImg.width();
|
|
if (sliderPct < 0) {
|
|
sliderPct = 0;
|
|
}
|
|
if (sliderPct > 1) {
|
|
sliderPct = 1;
|
|
}
|
|
adjustSlider(sliderPct);
|
|
});
|
|
}
|
|
|
|
container.find("img").on("mousedown", function(event) {
|
|
event.preventDefault();
|
|
});
|
|
|
|
$(window).trigger("resize.twentytwenty");
|
|
});
|
|
};
|
|
|
|
})(jQuery);
|