kianwilcox/gist:3628288

## gistfile1.txt
class Calculator < UIView
  attr_accessor :entryView
  attr_accessor :stepView
  attr_accessor :keyboardView

  attr_accessor :current_problem
  attr_accessor :nextInput
  attr_accessor :hint
  attr_accessor :reveal
  attr_accessor :explain
  attr_accessor :solution

  def initWithFrame(frame)
    super
    self.stepView=UITableView.alloc.initWithFrame(CGRectMake(0, 0, frame.size.width, 600), style:UITableViewStylePlain)
    self.stepView.transform = CGAffineTransformMakeRotation(3.14159)
    self.addSubview(self.stepView)
    self.stepView.dataSource = self
    self.stepView.delegate = self

    self.keyboardView=CalcKeyboardView.alloc.initWithFrame(CGRectMake(0, 1000, frame.size.width, 400))
    self.keyboardView.owner=self
    self.addSubview(self.keyboardView)

    self.entryView=EntryView.alloc.initWithFrame(CGRectMake(0, 600, frame.size.width, 100))
    self.addSubview(self.entryView)
    self.entryView.field.inputView=self.keyboardView

    self.entryView.field.becomeFirstResponder()
    self
  end

  def enter
     if self.solution.equation == "" || self.solution.equation == nil || self.solution.equation == "Enter Equation Here"
       self.solution.equation = self.entryView.field.text
        self.entryView.renderLatex(self.solution.equation, self.entryView.display)
        add
     elsif self.entryView.field.text == ""
     else
       add
     end
  end

  def add
    self.solution.add_step(entryView.field.text) do
       reload
     end
  end

  def reload
    self.entryView.field.text=""
    self.stepView.reloadData
  end

  def solve
    self.solution.solve do |solution|
      reload
    end
  end

  def buttonAction(button)
    fn = entryView.buttons[button]
    fn ||= ->() { self.entryView.field.text += button}
    fn.call()
  end


  def tableView(tableView, numberOfRowsInSection:section)
    self.solution.step_strings.count
  end

  def tableView(tableView, cellForRowAtIndexPath:indexPath)
    @reuseIdentifier ||= "CELL_IDENTIFIER"

    cell = tableView.dequeueReusableCellWithIdentifier(@reuseIdentifier) || begin
      UITableViewCell.alloc.initWithStyle(UITableViewCellStyleDefault, reuseIdentifier:@reuseIdentifier)
    end
    cell.transform = CGAffineTransformMakeRotation(3.14159)
    cell.contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth
    cell.backgroundColor = UIColor.clearColor
    eq = self.solution.step_strings.reverse[indexPath.row]

    frame = cell.contentView.frame
    web = UIWebView.alloc.initWithFrame(frame)
    web.scrollView.scrollEnabled = false
    web.scrollView.bounces = false
    web.delegate = self
    cell.contentView.addSubview(web)
    self.entryView.renderLatex(eq, web)
    cell
  end

end

class EntryView < UIView
  attr_accessor :display
  attr_accessor :field
  attr_accessor :hint
  attr_accessor :solve
  attr_accessor :index

  def renderLatex(latex, web)
    web.loadRequest(mathJax(latex))
  end


  def initWithFrame(frame)
    super
    self.index = 0
    @mathjax_path = NSBundle.mainBundle.pathForResource("MathJax", ofType:"js", inDirectory:"mathjax")
    size = frame.size
    self

    # where the current problem will be displayed
    self.display = UIWebView.alloc.initWithFrame(CGRectMake(120,20, 534, 30))
    self.display.sizeToFit
    self.display.layer.cornerRadius = 5;
    self.display.clipsToBounds = true;
    self.display.delegate = self

    self.addSubview(display)
    self.display.loadHTMLString("Please Enter an Equation Below", baseURL:nil)

    # Entry area for the equation we are solving
    self.field = CalcKeyboardInputField.alloc.initWithFrame(CGRectMake(120, 58, 534, 30))
     self.field.text = ""
     self.field.backgroundColor = UIColor.whiteColor
     self.field.borderStyle = UITextBorderStyleRoundedRect
     self.addSubview(self.field)

    self
  end

  def buttons
    self.field.buttons
  end

  def default_mathjax(eq)
    "<html><head><meta name='viewport' content='initial-scale=1.0' />
        <script type='text/javascript' src='#{@mathjax_path}?config=default.js'></script>
        </head><body><div id='mathjax'>$ #{eq} $</div></body></html>"
  end

  def mathJax(eq)
    self.index+=1
    temp = NSTemporaryDirectory().stringByAppendingPathComponent("math#{index}.html")
    writeStringToFile(default_mathjax(eq), temp)
    url = NSURL.fileURLWithPath(temp)
    NSURLRequest.alloc.initWithURL(url)
  end

  def writeStringToFile(string, path)
    string.writeToFile(path, atomically:true, encoding:NSUTF8StringEncoding, error:nil)
  end

end

class CalcKeyboardInputField < UITextField
  attr_accessor :owner
  attr_accessor :currentIndex
  attr_accessor :buttons

  def initWithFrame(frame)
    super
    @numerals = {}
    (0..9).each do |n|
       @numerals[n.to_s]= ->(){ self.text = after(self.text, n.to_s) }
    end

    @arithmetic = {}
    ['(', ')', '+', '-', '*', '/', '='].each do |op|
      @arithmetic[op]= ->(){ self.text = after(self.text, op) }
    end

    @special = {}

    ['Enter', 'Hint', 'Solve', 'Explain'].each do |action|
      @special[action]= ->(){ self.superview().superview().send(action.downcase) }
    end

    @special['<-']= ->(){ self.backspace }

    @buttons = @numerals.merge(@arithmetic).merge(@special)
    self
  end

  def viewDidLoad
    super
    self.owner = self.superview()
  end

  def buttons
    @buttons
  end

  def after(input, newInput)
    input+newInput
  end

  def before(input, newInput)
    newInput+input
  end

  def between(before, middle, after)
    before+middle+after
  end

  def backspace
    self.text = self.text.slice(0, self.text.length-1)
  end

end

class CalcKeyboardView < UIView
  attr_accessor :owner

  def initWithFrame(frame)
    super
    # .. do your magic
    rows.each_with_index do |row, rowIndex|
      row.each_with_index do |name, colIndex|
        newButton = roundedButtonWith(rowIndex, colIndex)
        self.addSubview(newButton)
        newButton.setTitle(name, forState:UIControlStateNormal)

        newButton.when(UIControlEventTouchUpInside) do
          owner.buttonAction(name)
        end
      end
    end
    self
  end

  def rows
    [
      ['Rad',    'Deg',   'x!',   '(',  ')',  '', 'sqrt', '<-'],
      ['sin',    'cos',   'x^2',  '7',  '8',  '9', '/',   'e'],
      ['sec',    'tan',   'ln',   '4',  '5',  '6', '*',   'pi'],
      ['sinh',   'cosh',  'log',  '1',  '2',  '3', '-',   '=', 'Solve'],
      ['sech',   'tanh',  'x^y',  '.',  '0',  'x', '+',   'Enter', 'Hint']
    ]
  end

  def roundedButtonWith(row,  col)
    button = UIButton.buttonWithType UIButtonTypeRoundedRect
    button.frame = CGRectMake(120+col*68, 160+row*48, 60, 40)
    button
  end
end
	class Calculator < UIView
	attr_accessor :entryView
	attr_accessor :stepView
	attr_accessor :keyboardView

	attr_accessor :current_problem
	attr_accessor :nextInput
	attr_accessor :hint
	attr_accessor :reveal
	attr_accessor :explain
	attr_accessor :solution

	def initWithFrame(frame)
	super
	self.stepView=UITableView.alloc.initWithFrame(CGRectMake(0, 0, frame.size.width, 600), style:UITableViewStylePlain)
	self.stepView.transform = CGAffineTransformMakeRotation(3.14159)
	self.addSubview(self.stepView)
	self.stepView.dataSource = self
	self.stepView.delegate = self

	self.keyboardView=CalcKeyboardView.alloc.initWithFrame(CGRectMake(0, 1000, frame.size.width, 400))
	self.keyboardView.owner=self
	self.addSubview(self.keyboardView)

	self.entryView=EntryView.alloc.initWithFrame(CGRectMake(0, 600, frame.size.width, 100))
	self.addSubview(self.entryView)
	self.entryView.field.inputView=self.keyboardView

	self.entryView.field.becomeFirstResponder()
	self
	end

	def enter
	if self.solution.equation == "" \|\| self.solution.equation == nil \|\| self.solution.equation == "Enter Equation Here"
	self.solution.equation = self.entryView.field.text
	self.entryView.renderLatex(self.solution.equation, self.entryView.display)
	add
	elsif self.entryView.field.text == ""
	else
	add
	end
	end

	def add
	self.solution.add_step(entryView.field.text) do
	reload
	end
	end

	def reload
	self.entryView.field.text=""
	self.stepView.reloadData
	end

	def solve
	self.solution.solve do \|solution\|
	reload
	end
	end

	def buttonAction(button)
	fn = entryView.buttons[button]
	fn \|\|= ->() { self.entryView.field.text += button}
	fn.call()
	end


	def tableView(tableView, numberOfRowsInSection:section)
	self.solution.step_strings.count
	end

	def tableView(tableView, cellForRowAtIndexPath:indexPath)
	@reuseIdentifier \|\|= "CELL_IDENTIFIER"

	cell = tableView.dequeueReusableCellWithIdentifier(@reuseIdentifier) \|\| begin
	UITableViewCell.alloc.initWithStyle(UITableViewCellStyleDefault, reuseIdentifier:@reuseIdentifier)
	end
	cell.transform = CGAffineTransformMakeRotation(3.14159)
	cell.contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth
	cell.backgroundColor = UIColor.clearColor
	eq = self.solution.step_strings.reverse[indexPath.row]

	frame = cell.contentView.frame
	web = UIWebView.alloc.initWithFrame(frame)
	web.scrollView.scrollEnabled = false
	web.scrollView.bounces = false
	web.delegate = self
	cell.contentView.addSubview(web)
	self.entryView.renderLatex(eq, web)
	cell
	end

	end

	class EntryView < UIView
	attr_accessor :display
	attr_accessor :field
	attr_accessor :hint
	attr_accessor :solve
	attr_accessor :index

	def renderLatex(latex, web)
	web.loadRequest(mathJax(latex))
	end



	def initWithFrame(frame)
	super
	self.index = 0
	@mathjax_path = NSBundle.mainBundle.pathForResource("MathJax", ofType:"js", inDirectory:"mathjax")
	size = frame.size
	self

	# where the current problem will be displayed
	self.display = UIWebView.alloc.initWithFrame(CGRectMake(120,20, 534, 30))
	self.display.sizeToFit
	self.display.layer.cornerRadius = 5;
	self.display.clipsToBounds = true;
	self.display.delegate = self

	self.addSubview(display)
	self.display.loadHTMLString("Please Enter an Equation Below", baseURL:nil)

	# Entry area for the equation we are solving
	self.field = CalcKeyboardInputField.alloc.initWithFrame(CGRectMake(120, 58, 534, 30))
	self.field.text = ""
	self.field.backgroundColor = UIColor.whiteColor
	self.field.borderStyle = UITextBorderStyleRoundedRect
	self.addSubview(self.field)

	self
	end

	def buttons
	self.field.buttons
	end

	def default_mathjax(eq)
	"<html><head><meta name='viewport' content='initial-scale=1.0' />
	<script type='text/javascript' src='#{@mathjax_path}?config=default.js'></script>
	</head><body><div id='mathjax'>$ #{eq} $</div></body></html>"
	end

	def mathJax(eq)
	self.index+=1
	temp = NSTemporaryDirectory().stringByAppendingPathComponent("math#{index}.html")
	writeStringToFile(default_mathjax(eq), temp)
	url = NSURL.fileURLWithPath(temp)
	NSURLRequest.alloc.initWithURL(url)
	end

	def writeStringToFile(string, path)
	string.writeToFile(path, atomically:true, encoding:NSUTF8StringEncoding, error:nil)
	end

	end

	class CalcKeyboardInputField < UITextField
	attr_accessor :owner
	attr_accessor :currentIndex
	attr_accessor :buttons

	def initWithFrame(frame)
	super
	@numerals = {}
	(0..9).each do \|n\|
	@numerals[n.to_s]= ->(){ self.text = after(self.text, n.to_s) }
	end

	@arithmetic = {}
	['(', ')', '+', '-', '*', '/', '='].each do \|op\|
	@arithmetic[op]= ->(){ self.text = after(self.text, op) }
	end

	@special = {}

	['Enter', 'Hint', 'Solve', 'Explain'].each do \|action\|
	@special[action]= ->(){ self.superview().superview().send(action.downcase) }
	end

	@special['<-']= ->(){ self.backspace }

	@buttons = @numerals.merge(@arithmetic).merge(@special)
	self
	end

	def viewDidLoad
	super
	self.owner = self.superview()
	end

	def buttons
	@buttons
	end

	def after(input, newInput)
	input+newInput
	end

	def before(input, newInput)
	newInput+input
	end

	def between(before, middle, after)
	before+middle+after
	end

	def backspace
	self.text = self.text.slice(0, self.text.length-1)
	end

	end

	class CalcKeyboardView < UIView
	attr_accessor :owner

	def initWithFrame(frame)
	super
	# .. do your magic
	rows.each_with_index do \|row, rowIndex\|
	row.each_with_index do \|name, colIndex\|
	newButton = roundedButtonWith(rowIndex, colIndex)
	self.addSubview(newButton)
	newButton.setTitle(name, forState:UIControlStateNormal)

	newButton.when(UIControlEventTouchUpInside) do
	owner.buttonAction(name)
	end
	end
	end
	self
	end

	def rows
	[
	['Rad', 'Deg', 'x!', '(', ')', '', 'sqrt', '<-'],
	['sin', 'cos', 'x^2', '7', '8', '9', '/', 'e'],
	['sec', 'tan', 'ln', '4', '5', '6', '*', 'pi'],
	['sinh', 'cosh', 'log', '1', '2', '3', '-', '=', 'Solve'],
	['sech', 'tanh', 'x^y', '.', '0', 'x', '+', 'Enter', 'Hint']
	]
	end

	def roundedButtonWith(row, col)
	button = UIButton.buttonWithType UIButtonTypeRoundedRect
	button.frame = CGRectMake(120+col68, 160+row48, 60, 40)
	button
	end
	end