Class Calculator

Object
   |
   +--Calculator

class Calculator

Defined in widgets/calculator.js

Field Detail

container

Object container

Calculator container layer

elements

Array elements

Array of calculator elements (action buttons)

ignore

Boolean ignore

Used to signal keys to be ignored inside keydown and keypress handlers

input

Object input

Calculator text input

lastOp

String lastOp

Last operator

left

Number left

Used to hold left operand value

newNum

Boolean newNum

Indicates if next number pressed will represent a new number

pendingOp

String pendingOp

Pending operator

right

Number right

Used to hold right operand value

target

Object target

Current calculator target (field)

trigger

Object trigger

Current calculator trigger (button, image or link)

loaded

<static> Boolean loaded

Indicates if the calculator singleton was already loaded

singleton

<static> Calculator singleton

Holds the single instance of the Calculator class, shared among all fields that use it

Calculator

Calculator()

The Calculator class is used to build a simple calculator widget to be used by numeric fields in the PHP2Go forms

backspace

void backspace()

Removes the rightmost number in the calculator text input

build

void build()

Builds the calculator widget

buttonHandler

void buttonHandler(<Object> sender)

Calculator button handler. Receives as parameter the event sender name and applies the proper action

Parameters:
sender - Button clicked

clear

void clear()

Resets the calculator status

clearEntry

void clearEntry()

Clears the current calculator entry

decimal

void decimal()

Adds a decimal point in the calculator text input

hide

void hide()

Hides the calculator widget. Called from within Calculator.setup()

keyDownHandler

void keyDownHandler(<Event> e)

Calculator keydown handler. Used to detect backspace and delete chars in browsers that can't detect them inside a keypress event

Parameters:
e - Event

keyPressHandler

void keyPressHandler(<Event> e)

Calculator keypress handler

Parameters:
e - Event

mouseDownHandler

void mouseDownHandler(<Event> e)

Listen to mousedown events in the document. If the target element is outside the calculator area and is not its trigger element, the calculator popup is closed

Parameters:
e - Event

negate

void negate()

Inverts the signal of the current calculator entry

number

void number(<Number> n)

Method called when a number (0-9) is pressed

Parameters:
n - Number pressed

operation

void operation(<String> op)

Method called when an operation button is pressed

Parameters:
op - Operation name

result

void result()

Called when the "Result" button is pressed. The current calculator value is copied to the target field

showAt

void showAt(<Object> tgr, <Object> trg, <String> align)

Shows the calculator widget in a given trigger and target. Called from within Calculator.setup()

Parameters:
tgr - Trigger
trg - Target field
align - Alignment ("right", "bottom")

setup

<static> void setup(<Object> opts)

Sets up a new calculator based on a set of options. The available options are trigger (calculator trigger), target (target field) and align (calculator alignment)

Parameters:
opts - Setup options