// script.aculo.us slider.js v1.7.0, Fri Jan 19 19:16:36 CET 2007
// Copyright (c) 2005, 2006 Marty Haught, Thomas Fuchs
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/
function K2Slider(handle, track, options) {
var self = this;
this.handle = jQuery(handle);
this.track = jQuery(track);
this.options = options || {};
this.value = this.options.value || 0;
this.maximum = this.options.maximum || 1;
this.minimum = this.options.minimum || 0;
this.trackLength = this.track.width();
this.handleLength = this.handle.width();
this.handle.css('position', 'absolute');
this.active = false;
this.dragging = false;
this.setValue(this.value);
this.handle.mousedown(function(event) {
self.active = true;
var pointer = self.pointerX(event);
var offset = self.track.offset();
self.setValue(
self.translateToValue(
pointer-offset.left-(self.handleLength/2)
)
);
var offset = self.handle.offset();
self.offsetX = (pointer - offset.left);
});
this.track.mousedown(function(event) {
var offset = self.track.offset();
var pointer = self.pointerX(event);
self.setValue(
self.translateToValue(
pointer-offset.left-(self.handleLength/2)
)
);
});
jQuery(document).mouseup(function(event){
if (self.active && self.dragging) {
self.active = false;
self.dragging = false;
self.updateFinished(self);
}
self.active = false;
self.dragging = false;
});
jQuery(document).mousemove(function(event){
if (self.active) {
if (!self.dragging) self.dragging = true;
self.draw(event);
// fix AppleWebKit rendering
if (navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
}
});
this.initialized = true;
};
K2Slider.prototype.getNearestValue = function(value) {
if (value > this.maximum) return this.maximum;
if (value < this.minimum) return this.minimum;
return value;
};
K2Slider.prototype.setValue = function(value) {
this.value = this.getNearestValue(value);
this.handle.css('left', this.translateToPx(this.value));
if (!this.dragging || !this.event) this.updateFinished(this);
};
K2Slider.prototype.setValueBy = function(delta) {
this.setValue(this.value + delta);
};
K2Slider.prototype.translateToPx = function(value) {
return Math.round(
((this.trackLength-this.handleLength)/(this.maximum-this.minimum)) *
(value - this.minimum)) + "px";
};
K2Slider.prototype.translateToValue = function(offset) {
return Math.round(
((offset/(this.trackLength-this.handleLength) *
(this.maximum-this.minimum)) + this.minimum));
};
K2Slider.prototype.draw = function(event) {
var pointer = this.pointerX(event);
var offset = this.track.offset();
pointer -= this.offsetX + offset.left;
this.event = event;
this.setValue( this.translateToValue(pointer) );
if (this.initialized && this.options.onSlide)
this.options.onSlide(this.value);
};
K2Slider.prototype.updateFinished = function(self) {
if (self.initialized && self.options.onChange)
self.options.onChange(self.value);
self.event = null;
};
K2Slider.prototype.pointerX = function(event) {
return event.pageX || (event.clientX +
(document.documentElement.scrollLeft || document.body.scrollLeft));
};
K2Slider.prototype.isLeftClick = function(event) {
return (((event.which) && (event.which == 1)) ||
((event.button) && (event.button == 1)));
};
