0001:// script.aculo.us slider.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008
0002:
0003:// Copyright (c) 2005-2007 Marty Haught, Thomas Fuchs 
0004://
0005:// script.aculo.us is freely distributable under the terms of an MIT-style license.
0006:// For details, see the script.aculo.us web site: http://script.aculo.us/
0007:

0008:if (!Control) var Control = { };
0009:

0010:// options:
0011://  axis: 'vertical', or 'horizontal' (default)
0012://
0013:// callbacks:
0014://  onChange(value)
0015://  onSlide(value)

0016:Control.Slider = Class.create({
0017:  initialize: function(handle, track, options) {
0018:    var slider = this;
0019:    
0020:    if (Object.isArray(handle)) {
0021:      this.handles = handle.collect( function(e) { return $(e) });
0022:    } else {
0023:      this.handles = [$(handle)];
0024:    }
0025:    
0026:    this.track   = $(track);
0027:    this.options = options || { };
0028:
0029:    this.axis      = this.options.axis || 'horizontal';
0030:    this.increment = this.options.increment || 1;
0031:    this.step      = parseInt(this.options.step || '1');
0032:    this.range     = this.options.range || $R(0,1);
0033:    
0034:    this.value     = 0; // assure backwards compat
0035:    this.values    = this.handles.map( function() { return 0 });
0036:    this.spans     = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
0037:    this.options.startSpan = $(this.options.startSpan || null);
0038:    this.options.endSpan   = $(this.options.endSpan || null);
0039:
0040:    this.restricted = this.options.restricted || false;
0041:
0042:    this.maximum   = this.options.maximum || this.range.end;
0043:    this.minimum   = this.options.minimum || this.range.start;
0044:
0045:    // Will be used to align the handle onto the track, if necessary
0046:    this.alignX = parseInt(this.options.alignX || '0');
0047:    this.alignY = parseInt(this.options.alignY || '0');
0048:    
0049:    this.trackLength = this.maximumOffset() - this.minimumOffset();
0050:
0051:    this.handleLength = this.isVertical() ? 
0052:      (this.handles[0].offsetHeight != 0 ? 
0053:        this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) : 
0054:      (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth : 
0055:        this.handles[0].style.width.replace(/px$/,""));
0056:
0057:    this.active   = false;
0058:    this.dragging = false;
0059:    this.disabled = false;
0060:
0061:    if (this.options.disabled) this.setDisabled();
0062:
0063:    // Allowed values array
0064:    this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
0065:    if (this.allowedValues) {
0066:      this.minimum = this.allowedValues.min();
0067:      this.maximum = this.allowedValues.max();
0068:    }
0069:
0070:    this.eventMouseDown = this.startDrag.bindAsEventListener(this);
0071:    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
0072:    this.eventMouseMove = this.update.bindAsEventListener(this);
0073:
0074:    // Initialize handles in reverse (make sure first handle is active)
0075:    this.handles.each( function(h,i) {
0076:      i = slider.handles.length-1-i;
0077:      slider.setValue(parseFloat(
0078:        (Object.isArray(slider.options.sliderValue) ? 
0079:          slider.options.sliderValue[i] : slider.options.sliderValue) || 
0080:         slider.range.start), i);
0081:      h.makePositioned().observe("mousedown", slider.eventMouseDown);
0082:    });
0083:    
0084:    this.track.observe("mousedown", this.eventMouseDown);
0085:    document.observe("mouseup", this.eventMouseUp);
0086:    document.observe("mousemove", this.eventMouseMove);
0087:    
0088:    this.initialized = true;
0089:  },