source: Dev/trunk/src/client/dojox/calendar/_VerticalScrollBarBase.js

define(["dojo/_base/declare", "dojo/_base/event", "dojo/_base/lang", "dojo/on", "dojo/dom-style", "dijit/_WidgetBase"],
function(declare, event, lang, on, domStyle, _WidgetBase){
        
                return declare('dojox.calendar._VerticalScrollBarBase', _WidgetBase, {
                
                // value: Number 
                //              The value of the scroll bar in pixel offset.
                value: 0,
                
                // minimum: Number 
                //              The minimum value of the scroll bar.
                minimum: 0,
                
                // maximum: Number 
                //              The maximum value of the scroll bar.
                maximum: 100,
                
                _scrollHandle: null,
                
                buildRendering: function(){
                        this.inherited(arguments);
                        this.own(on(this.domNode, "scroll", lang.hitch(this, function(param) {
                                this.value = this._getDomScrollerValue();
                                this.onChange(this.value);
                                this.onScroll(this.value);
                        })));
                },

                _getDomScrollerValue : function() {
                        return this.domNode.scrollTop;
                },
                
                _setDomScrollerValue : function(value) {
                        this.domNode.scrollTop = value; 
                },
                        
                _setValueAttr: function(value){
                        value = Math.min(this.maximum, value);
                        value = Math.max(this.minimum, value);
                        if (this.value != value) {
                                this.value = value;                      
                                this.onChange(value);
                                this._setDomScrollerValue(value);
                        }
                },
                                
                onChange: function(value){
                        // summary:
                        //               An extension point invoked when the value has changed.
                        // value: Integer
                        //              The postiion of the scroll bar in pixels.
                        // tags:
                        //              callback
                },
                
                onScroll: function(value){
                        // summary:
                        //               An extension point invoked when the user scrolls with the mouse.
                        // value: Integer
                        //              The position of the scroll bar in pixels.
                        // tags:
                        //              callback
                },
                
                _setMinimumAttr: function(value){
                        value = Math.min(value, this.maximum);
                        this.minimum = value;
                },
                
                _setMaximumAttr: function(value){
                        value = Math.max(value, this.minimum);
                        this.maximum = value;
                        
                        domStyle.set(this.content, "height", value + "px");
                }

        });

});