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\f0\fs24 \cf0 // script.aculo.us slider.js v1.8.0, Tue Nov 06 15:01:40 +0300 2007\
\
// Copyright (c) 2005-2007 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/\
\
if (!Control) var Control = \{ \};\
\
// options:\
//  axis: 'vertical', or 'horizontal' (default)\
//\
// callbacks:\
//  onChange(value)\
//  onSlide(value)\
Control.Slider = Class.create(\{\
  initialize: function(handle, track, options) \{\
    var slider = this;\
    \
    if (Object.isArray(handle)) \{\
      this.handles = handle.collect( function(e) \{ return $(e) \});\
    \} else \{\
      this.handles = [$(handle)];\
    \}\
    \
    this.track   = $(track);\
    this.options = options || \{ \};\
\
    this.axis      = this.options.axis || 'horizontal';\
    this.increment = this.options.increment || 1;\
    this.step      = parseInt(this.options.step || '1');\
    this.range     = this.options.range || $R(0,1);\
    \
    this.value     = 0; // assure backwards compat\
    this.values    = this.handles.map( function() \{ return 0 \});\
    this.spans     = this.options.spans ? this.options.spans.map(function(s)\{ return $(s) \}) : false;\
    this.options.startSpan = $(this.options.startSpan || null);\
    this.options.endSpan   = $(this.options.endSpan || null);\
\
    this.restricted = this.options.restricted || false;\
\
    this.maximum   = this.options.maximum || this.range.end;\
    this.minimum   = this.options.minimum || this.range.start;\
\
    // Will be used to align the handle onto the track, if necessary\
    this.alignX = parseInt(this.options.alignX || '0');\
    this.alignY = parseInt(this.options.alignY || '0');\
    \
    this.trackLength = this.maximumOffset() - this.minimumOffset();\
\
    this.handleLength = this.isVertical() ? \
      (this.handles[0].offsetHeight != 0 ? \
        this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) : \
      (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth : \
        this.handles[0].style.width.replace(/px$/,""));\
\
    this.active   = false;\
    this.dragging = false;\
    this.disabled = false;\
\
    if (this.options.disabled) this.setDisabled();\
\
    // Allowed values array\
    this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;\
    if (this.allowedValues) \{\
      this.minimum = this.allowedValues.min();\
      this.maximum = this.allowedValues.max();\
    \}\
\
    this.eventMouseDown = this.startDrag.bindAsEventListener(this);\
    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);\
    this.eventMouseMove = this.update.bindAsEventListener(this);\
\
    // Initialize handles in reverse (make sure first handle is active)\
    this.handles.each( function(h,i) \{\
      i = slider.handles.length-1-i;\
      slider.setValue(parseFloat(\
        (Object.isArray(slider.options.sliderValue) ? \
          slider.options.sliderValue[i] : slider.options.sliderValue) || \
         slider.range.start), i);\
      h.makePositioned().observe("mousedown", slider.eventMouseDown);\
    \});\
    \
    this.track.observe("mousedown", this.eventMouseDown);\
    document.observe("mouseup", this.eventMouseUp);\
    document.observe("mousemove", this.eventMouseMove);\
    \
    this.initialized = true;\
  \},\
  dispose: function() \{\
    var slider = this;    \
    Event.stopObserving(this.track, "mousedown", this.eventMouseDown);\
    Event.stopObserving(document, "mouseup", this.eventMouseUp);\
    Event.stopObserving(document, "mousemove", this.eventMouseMove);\
    this.handles.each( function(h) \{\
      Event.stopObserving(h, "mousedown", slider.eventMouseDown);\
    \});\
  \},\
  setDisabled: function()\{\
    this.disabled = true;\
  \},\
  setEnabled: function()\{\
    this.disabled = false;\
  \},  \
  getNearestValue: function(value)\{\
    if (this.allowedValues)\{\
      if (value >= this.allowedValues.max()) return(this.allowedValues.max());\
      if (value <= this.allowedValues.min()) return(this.allowedValues.min());\
      \
      var offset = Math.abs(this.allowedValues[0] - value);\
      var newValue = this.allowedValues[0];\
      this.allowedValues.each( function(v) \{\
        var currentOffset = Math.abs(v - value);\
        if (currentOffset <= offset)\{\
          newValue = v;\
          offset = currentOffset;\
        \} \
      \});\
      return newValue;\
    \}\
    if (value > this.range.end) return this.range.end;\
    if (value < this.range.start) return this.range.start;\
    return value;\
  \},\
  setValue: function(sliderValue, handleIdx)\{\
    if (!this.active) \{\
      this.activeHandleIdx = handleIdx || 0;\
      this.activeHandle    = this.handles[this.activeHandleIdx];\
      this.updateStyles();\
    \}\
    handleIdx = handleIdx || this.activeHandleIdx || 0;\
    if (this.initialized && this.restricted) \{\
      if ((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))\
        sliderValue = this.values[handleIdx-1];\
      if ((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))\
        sliderValue = this.values[handleIdx+1];\
    \}\
    sliderValue = this.getNearestValue(sliderValue);\
    this.values[handleIdx] = sliderValue;\
    this.value = this.values[0]; // assure backwards compat\
    \
    this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] = \
      this.translateToPx(sliderValue);\
    \
    this.drawSpans();\
    if (!this.dragging || !this.event) this.updateFinished();\
  \},\
  setValueBy: function(delta, handleIdx) \{\
    this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta, \
      handleIdx || this.activeHandleIdx || 0);\
  \},\
  translateToPx: function(value) \{\
    return Math.round(\
      ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) * \
      (value - this.range.start)) + "px";\
  \},\
  translateToValue: function(offset) \{\
    return ((offset/(this.trackLength-this.handleLength) * \
      (this.range.end-this.range.start)) + this.range.start);\
  \},\
  getRange: function(range) \{\
    var v = this.values.sortBy(Prototype.K); \
    range = range || 0;\
    return $R(v[range],v[range+1]);\
  \},\
  minimumOffset: function()\{\
    return(this.isVertical() ? this.alignY : this.alignX);\
  \},\
  maximumOffset: function()\{\
    return(this.isVertical() ? \
      (this.track.offsetHeight != 0 ? this.track.offsetHeight :\
        this.track.style.height.replace(/px$/,"")) - this.alignY : \
      (this.track.offsetWidth != 0 ? this.track.offsetWidth : \
        this.track.style.width.replace(/px$/,"")) - this.alignX);\
  \},  \
  isVertical:  function()\{\
    return (this.axis == 'vertical');\
  \},\
  drawSpans: function() \{\
    var slider = this;\
    if (this.spans)\
      $R(0, this.spans.length-1).each(function(r) \{ slider.setSpan(slider.spans[r], slider.getRange(r)) \});\
    if (this.options.startSpan)\
      this.setSpan(this.options.startSpan,\
        $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));\
    if (this.options.endSpan)\
      this.setSpan(this.options.endSpan, \
        $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));\
  \},\
  setSpan: function(span, range) \{\
    if (this.isVertical()) \{\
      span.style.top = this.translateToPx(range.start);\
      span.style.height = this.translateToPx(range.end - range.start + this.range.start);\
    \} else \{\
      span.style.left = this.translateToPx(range.start);\
      span.style.width = this.translateToPx(range.end - range.start + this.range.start);\
    \}\
  \},\
  updateStyles: function() \{\
    this.handles.each( function(h)\{ Element.removeClassName(h, 'selected') \});\
    Element.addClassName(this.activeHandle, 'selected');\
  \},\
  startDrag: function(event) \{\
    if (Event.isLeftClick(event)) \{\
      if (!this.disabled)\{\
        this.active = true;\
        \
        var handle = Event.element(event);\
        var pointer  = [Event.pointerX(event), Event.pointerY(event)];\
        var track = handle;\
        if (track==this.track) \{\
          var offsets  = Position.cumulativeOffset(this.track); \
          this.event = event;\
          this.setValue(this.translateToValue( \
           (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)\
          ));\
          var offsets  = Position.cumulativeOffset(this.activeHandle);\
          this.offsetX = (pointer[0] - offsets[0]);\
          this.offsetY = (pointer[1] - offsets[1]);\
        \} else \{\
          // find the handle (prevents issues with Safari)\
          while((this.handles.indexOf(handle) == -1) && handle.parentNode) \
            handle = handle.parentNode;\
            \
          if (this.handles.indexOf(handle)!=-1) \{\
            this.activeHandle    = handle;\
            this.activeHandleIdx = this.handles.indexOf(this.activeHandle);\
            this.updateStyles();\
            \
            var offsets  = Position.cumulativeOffset(this.activeHandle);\
            this.offsetX = (pointer[0] - offsets[0]);\
            this.offsetY = (pointer[1] - offsets[1]);\
          \}\
        \}\
      \}\
      Event.stop(event);\
    \}\
  \},\
  update: function(event) \{\
   if (this.active) \{\
      if (!this.dragging) this.dragging = true;\
      this.draw(event);\
      if (Prototype.Browser.WebKit) window.scrollBy(0,0);\
      Event.stop(event);\
   \}\
  \},\
  draw: function(event) \{\
    var pointer = [Event.pointerX(event), Event.pointerY(event)];\
    var offsets = Position.cumulativeOffset(this.track);\
    pointer[0] -= this.offsetX + offsets[0];\
    pointer[1] -= this.offsetY + offsets[1];\
    this.event = event;\
    this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));\
    if (this.initialized && this.options.onSlide)\
      this.options.onSlide(this.values.length>1 ? this.values : this.value, this);\
  \},\
  endDrag: function(event) \{\
    if (this.active && this.dragging) \{\
      this.finishDrag(event, true);\
      Event.stop(event);\
    \}\
    this.active = false;\
    this.dragging = false;\
  \},  \
  finishDrag: function(event, success) \{\
    this.active = false;\
    this.dragging = false;\
    this.updateFinished();\
  \},\
  updateFinished: function() \{\
    if (this.initialized && this.options.onChange) \
      this.options.onChange(this.values.length>1 ? this.values : this.value, this);\
    this.event = null;\
  \}\
\});\
}