Graphing Scientific Calculator widget

[Douglas Hays]

The Calculator widget should be a client-side only solution and able to fill a large need for multi-function/multi-purpose calculators utilized within a widely varying set of web-pages from mortgage loans to college math classes to tax-returns.

Key Attributes:

• Inherits from _dijit._Templated
  
• Graph functions of the form y=f(x)
  
• Accepts localized numeric input similar to dijit.form.NumberTextBox?
  
• Additionally accepts exponential notation
  
• Expression parser must handle non-JavaScript? syntax such as x^y instead of Math.pow(x,y) and n! instead of dojox.math.factorial(n)
  
• Configurable single or multi-line display
  
• Expression history with edit capability
  
• Utilizes dojox graphing capabilities for function plots
  
• Customizable themes (e.g. 4 function, scientific, graphing)
  
• Support at least basic trigonometry (with both degrees and radians) and statistical functions
  
• User-defined functions
  
• Base conversions
  
• Buttons can be styled and rearranged
  
• Keyboard accessible
  

[jason_hays22]

The patch file for the calculator

[Douglas Hays]

(In [22729]) Fixes #11184. Initial commit of dojox/calc project contributed by jason_hays22 (CLA on file) through GSoC.

[Douglas Hays]

(In [22730]) Refs #11184. Remove extraneous debug messages.