flymis/WebRoot/dojojs/src/widget/Slider.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.widget.Slider");

// load dependencies
dojo.require("dojo.event.*");
dojo.require("dojo.dnd.*");
// dojo.dnd.* doesn't include this package, because it's not in __package__.js
dojo.require("dojo.dnd.HtmlDragMove");
dojo.require("dojo.widget.*");
dojo.require("dojo.html.layout");


// summary
//	Slider Widget.
//	
//	The slider widget comes in three forms:
//	 1. Base Slider widget which supports movement in x and y dimensions
//	 2. Vertical Slider (SliderVertical) widget which supports movement
//	    only in the y dimension.
//	 3. Horizontal Slider (SliderHorizontal) widget which supports movement
//	    only in the x dimension.
//
//	The key objects in the widget are:
//	 - a container div which displays a bar in the background (Slider object)
//	 - a handle inside the container div, which represents the value
//	   (sliderHandle DOM node)
//	 - the object which moves the handle (_handleMove is of type 
//	   SliderDragMoveSource)
//
//	The values for the slider are calculated by grouping pixels together, 
//	based on the number of values to be represented by the slider.
//	The number of pixels in a group is called the _valueSize
//	 e.g. if slider is 150 pixels long, and is representing the values
//	      0,1,...10 then pixels are grouped into lots of 15 (_valueSize), where:
//	        value 0 maps to pixels  0 -  7
//	              1                 8 - 22
//	              2                23 - 37 etc.
//	The accuracy of the slider is limited to the number of pixels
//	(i.e tiles > pixels will result in the slider not being able to
//	 represent some values).
dojo.widget.defineWidget (
	"dojo.widget.Slider",
	dojo.widget.HtmlWidget,
	{
		// Number
		//	minimum value to be represented by slider in the horizontal direction
		minimumX: 0,
		// Number
		//	minimum value to be represented by slider in the vertical direction
		minimumY: 0,
		// Number