manual:Calculations

Keyboard Maestro supports calculations in almost any numeric text fields. For example you can Pause for “60*Time in Minute”s. Calculations can also use comma separated lists of numbers as arrays, and can return such arrays, so you can operate on frames and points.

[@JMichael: This needs to be replaced with screenshots of KM Actions. The “code” below is NOT supported by KM]

**This is Pseudo Code Representing KM Actions**

Set variable ‘Temp’ To Text ‘%WindowFrame%1%’ Set variable ‘Temp’ To Calculation ‘Temp.x+Temp.width/2,Temp.y+Temp.height/2’ Use ‘Temp’ to Set the Mouse Location

will result in the mouse being placed at the center of the front window.

Note: You must use commas for this purpose, and full stops (.) for decimal numbers, and never use any thousands separators, regardless of your desired language.

Keyboard Maestro’s expressions include precedence, nested bracketed expressions, many built-in functions, various numeric bases, so you should be able to write almost any expressions you might like to use, as well as use it as a general purpose calculator if desired.

Operators based on precedence from lowest to highest are:

array separator (,) | separates elements of an array |

ternary operator (?) | a=b ? 3 : 4 |

bitwise or (|), bitwise and (&) and bitwise xor | operators |

comparison operators (<, ≤, =, >, ≥, ≠) | compare for (in)equality and return 0 or 1 |

shift operators (≪, ≫) | shift a number left or right |

addition operators (+, -) | add or subtract |

multiplication operators (*, /, MOD) | multiply, divide or Modulo |

power operator (^) | exponentiation |

unary prefix operators (√ (Option-V), -, brackets) | square root, negation, sub-expressions |

functions | a large variety of functions |

numbers and variables or array accesses (5,$5A,0x50,8#007,Variable,Variable[5]) | identifiers and values |

unary postfix operators (!,%,° (Option-Shift-8)) | factorial, percent, degrees |

To minimize conflict with variables, operators and functions must be in uppercase.

The available functions are listed on the wiki Functions page.

Keyboard Maestro refers to screen coordinates as two or four comma separated numbers in the text of a Keyboard Maestro Variable (which is always a string).

- Screen object points, like the left,top position of a window, with two values, like 12,34
- Screen object rectangles, like the frame of a window, have four values 12,34,56,78 (with a fifth value for fuzz in some instances).

* You can reference these values by position in the string, as it the Variable were an array: - For example:

if the Variable`myWindow`

is “12,34,56,78”

then all of these forms of reference will provide a value of 34 in a Calculation field:- myWindow[2]
- myWindow.Y
- myWindow.Top

In a Calculation field you can reference the numbers in a Keyboard Maestro Variable (which is always a string) using dot notation:

(The Variable Name and Dot reference are case insensitive.)

Variable.x | x coordinate |

Variable.y | y coordinate |

Variable.left | the left coordinate of a rectangle |

Variable.top | the top coordinate of a rectangle |

Variable.right | the right coordinate of a rectangle |

Variable.bottom | the right coordinate of a rectangle |

Variable.width | the width of a rectangle or size |

Variable.height | the height of a rectangle or size |

Variable.fuzz | the fuzz of an image match (rectangle,fuzz) |

Variable.MidX | the horizontal middle of a rectangle |

Variable.MidY | the vertical middle of a rectangle |

** Macro Actions**

**Example Results**

Some example expressions might be:

Amount in Dollars * 100 MJD() > 55928 NOW() > TIME(2012,3,23,12,2,1) DOW(TIME(2012,4,4)) = 4 Radius*SIN(20°),Radius*COS(20°) Window Frame[1]+Window Frame[3]/2,Window Frame.MidY MOUSEBUTTON() + 2 * MOUSEBUTTON(4) SCREEN(Internal,Left,10%)

manual/Calculations.txt · Last modified: 2017/03/10 20:15 by JMichaelTX