1 files changed, 258 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers/javascripts/slider.js b/actionpack/lib/action_view/helpers/javascripts/slider.js
new file mode 100644
index 0000000000..1712b98943
--- /dev/null
+++ b/actionpack/lib/action_view/helpers/javascripts/slider.js
@@ -0,0 +1,258 @@
+// Copyright (c) 2005 Marty Haught
+// 
+// See scriptaculous.js for full license.
+
+if(!Control) var Control = {};
+Control.Slider = Class.create();
+
+// options:
+//  axis: 'vertical', or 'horizontal' (default)
+//  increment: (default: 1)
+//  step: (default: 1)
+//
+// callbacks:
+//  onChange(value)
+//  onSlide(value)
+Control.Slider.prototype = {
+  initialize: function(handle, track, options) {
+    this.handle  = $(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.value     = 0;
+
+    var defaultMaximum = Math.round(this.track.offsetWidth / this.increment);
+    if(this.isVertical()) defaultMaximum = Math.round(this.track.offsetHeight / this.increment);   
+    
+    this.maximum = this.options.maximum || defaultMaximum;
+    this.minimum = this.options.minimum || 0;
+
+    // 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;
+
+    // Zero out the slider position	
+    this.setCurrentLeft(Position.cumulativeOffset(this.track)[0] - Position.cumulativeOffset(this.handle)[0] + this.alignX);
+    this.setCurrentTop(this.trackTop() - Position.cumulativeOffset(this.handle)[1] + this.alignY);
+
+    this.offsetX = 0;
+    this.offsetY = 0;
+
+    this.originalLeft = this.currentLeft();
+    this.originalTop  = this.currentTop();
+    this.originalZ    = parseInt(this.handle.style.zIndex || "0");
+
+    // Prepopulate Slider value
+    this.setSliderValue(parseInt(this.options.sliderValue) || 0);
+
+    this.active   = false;
+    this.dragging = false;
+    this.disabled = false;
+
+    // FIXME: use css
+    this.handleImage    = $(this.options.handleImage) || false; 
+    this.handleDisabled = this.options.handleDisabled || false;
+    this.handleEnabled  = false;
+    if(this.handleImage)
+      this.handleEnabled  = this.handleImage.src || false;
+
+    if(this.options.disabled)
+      this.setDisabled();
+
+    // Value Array
+    this.values = this.options.values || false;  // Add method to validate and sort??
+
+    Element.makePositioned(this.handle); // fix IE
+
+    this.eventMouseDown = this.startDrag.bindAsEventListener(this);
+    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
+    this.eventMouseMove = this.update.bindAsEventListener(this);
+    this.eventKeypress  = this.keyPress.bindAsEventListener(this);
+
+    Event.observe(this.handle, "mousedown", this.eventMouseDown);
+    Event.observe(document, "mouseup", this.eventMouseUp);
+    Event.observe(document, "mousemove", this.eventMouseMove);
+    Event.observe(document, "keypress", this.eventKeypress);
+  },
+  dispose: function() {
+    Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
+    Event.stopObserving(document, "mouseup", this.eventMouseUp);
+    Event.stopObserving(document, "mousemove", this.eventMouseMove);
+    Event.stopObserving(document, "keypress", this.eventKeypress);
+  },
+  setDisabled: function(){
+    this.disabled = true;
+    if(this.handleDisabled)
+      this.handleImage.src = this.handleDisabled;
+  },
+  setEnabled: function(){
+    this.disabled = false;
+    if(this.handleEnabled)
+      this.handleImage.src = this.handleEnabled;
+  },  
+  currentLeft: function() {
+    return parseInt(this.handle.style.left || '0');
+  },
+  currentTop: function() {
+    return parseInt(this.handle.style.top || '0');
+  },
+  setCurrentLeft: function(left) {
+    this.handle.style.left = left +"px";
+  },
+  setCurrentTop: function(top) {
+    this.handle.style.top = top +"px";
+  },
+  trackLeft: function(){
+    return Position.cumulativeOffset(this.track)[0];
+  },
+  trackTop: function(){
+    return Position.cumulativeOffset(this.track)[1];
+  }, 
+  getNearestValue: function(value){
+    if(this.values){
+      var i = 0;
+      var offset = Math.abs(this.values[0] - value);
+      var newValue = this.values[0];
+
+      for(i=0; i < this.values.length; i++){
+        var currentOffset = Math.abs(this.values[i] - value);
+        if(currentOffset < offset){
+          newValue = this.values[i];
+          offset = currentOffset;
+        }
+      }
+      return newValue;
+    }
+    return value;
+  },
+  setSliderValue:  function(sliderValue){
+    // First check our max and minimum and nearest values
+    sliderValue = this.getNearestValue(sliderValue);	
+    if(sliderValue > this.maximum) sliderValue = this.maximum;
+    if(sliderValue < this.minimum) sliderValue = this.minimum;
+    var offsetDiff = (sliderValue - (this.value||this.minimum)) * this.increment;
+    
+    if(this.isVertical()){
+      this.setCurrentTop(offsetDiff + this.currentTop());
+    } else {
+      this.setCurrentLeft(offsetDiff + this.currentLeft());
+    }
+    this.value = sliderValue;
+    this.updateFinished();
+  },  
+  minimumOffset: function(){
+    return(this.isVertical() ? 
+      this.trackTop() + this.alignY :
+      this.trackLeft() + this.alignX);
+  },
+  maximumOffset: function(){
+    return(this.isVertical() ?
+      this.trackTop() + this.alignY + (this.maximum - this.minimum) * this.increment :
+      this.trackLeft() + this.alignX + (this.maximum - this.minimum) * this.increment);
+  },  
+  isVertical:  function(){
+    return (this.axis == 'vertical');
+  },
+  startDrag: function(event) {
+    if(Event.isLeftClick(event)) {
+      if(!this.disabled){
+        this.active = true;
+        var pointer = [Event.pointerX(event), Event.pointerY(event)];
+        var offsets = Position.cumulativeOffset(this.handle);
+        this.offsetX =  (pointer[0] - offsets[0]);
+        this.offsetY =  (pointer[1] - offsets[1]);
+        this.originalLeft = this.currentLeft();
+        this.originalTop = this.currentTop();
+      }
+      Event.stop(event);
+    }
+  },
+  update: function(event) {
+   if(this.active) {
+      if(!this.dragging) {
+        var style = this.handle.style;
+        this.dragging = true;
+        if(style.position=="") style.position = "relative";
+        style.zIndex = this.options.zindex;
+      }
+      this.draw(event);
+      // fix AppleWebKit rendering
+      if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
+      Event.stop(event);
+   }
+  },
+  draw: function(event) {
+    var pointer = [Event.pointerX(event), Event.pointerY(event)];
+    var offsets = Position.cumulativeOffset(this.handle);
+
+    offsets[0] -= this.currentLeft();
+    offsets[1] -= this.currentTop();
+        
+    // Adjust for the pointer's position on the handle
+    pointer[0] -= this.offsetX;
+    pointer[1] -= this.offsetY;
+    var style = this.handle.style;
+
+    if(this.isVertical()){
+      if(pointer[1] > this.maximumOffset())
+        pointer[1] = this.maximumOffset();
+      if(pointer[1] < this.minimumOffset())
+        pointer[1] =  this.minimumOffset();
+
+    // Increment by values
+    if(this.values){
+      this.value = this.getNearestValue(Math.round((pointer[1] - this.minimumOffset()) / this.increment) + this.minimum);
+      pointer[1] = this.trackTop() + this.alignY + (this.value - this.minimum) * this.increment;
+    } else {
+      this.value = Math.round((pointer[1] - this.minimumOffset()) / this.increment) + this.minimum;
+    }
+    style.top  = pointer[1] - offsets[1] + "px";
+    } else {
+      if(pointer[0] > this.maximumOffset()) pointer[0] = this.maximumOffset();
+      if(pointer[0] < this.minimumOffset())	pointer[0] =  this.minimumOffset();
+      // Increment by values
+      if(this.values){
+        this.value = this.getNearestValue(Math.round((pointer[0] - this.minimumOffset()) / this.increment) + this.minimum);
+        pointer[0] = this.trackLeft() + this.alignX + (this.value - this.minimum) * this.increment;
+      } else {
+        this.value = Math.round((pointer[0] - this.minimumOffset()) / this.increment) + this.minimum;
+      }
+      style.left = (pointer[0] - offsets[0]) + "px";
+    }
+    if(this.options.onSlide) this.options.onSlide(this.value);
+  },
+  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.handle.style.zIndex = this.originalZ;
+    this.originalLeft = this.currentLeft();
+    this.originalTop  = this.currentTop();
+    this.updateFinished();
+  },
+  updateFinished: function() {
+    if(this.options.onChange) this.options.onChange(this.value);
+  },
+  keyPress: function(event) {
+    if(this.active && !this.disabled) {
+      switch(event.keyCode) {
+        case Event.KEY_ESC:
+          this.finishDrag(event, false);
+          Event.stop(event); 
+          break;
+      }
+      if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
+    }
+  }
+}