LabVIEW-Color-Pipes

LabVIEW library to color pipes (Boolean indicators) based on one or more expressions.

Getting Started

Clone the repository and run the /Pipes Example.vi to demostrate how to configure and update the pipe colors (Boolean indicators). Toggle the valves and mass flow controller (MFC) value to see the pipe colors change accordingly.

Usage

Pipes are Classic Flat Square Boolean Indicators, edit the pipe description to add one or more color definitions formatted as:

x<color_hex>|<pipe_name>:[<expression>]

If the expression is evaluated to True (or != 0), the pipe value is set to True and the color is set to <color_hex> or the current <pipe_name> color.

Note: Colors must start with 'x'. e.g. xFFDDEE = FFDDEE as RRGGBB.

If the expression is empty, the referenced <pipe_name>: value and color are cloned (usefull for multi-pipe segments).

Expressions can be nested using parentheses (a or b) and (c or d).

Expressions can use pythonic nomenclature (a and b or not c) or C++ nomenclature (a && b || !c).

Expressions supported:

AND:          and | && | &
OR:           or | '||' | '|'
NOT:          not | !
EQUAL:        ==
NOT EQUAL:    !=
LESS THAN:    <
GREATER THAN: >
LTE:          <=
GTE:          >=
PARENTHESES:  (..)
LITERAL:      Boolean | DBL | I32 | U32
IDENTIFIER:   [A-Za-z_][A-Za-z0-9_]*

Note: Bit-wise and assignment operations are not supported.

Example Pipe Descriptions

Specify one or more color definitions by editing the pipe boolean front panel description as:

x<color_hex>|<pipe_name>:[<expression>]

Note: The first expression to evaluate to True is returned. Otherwise the pipe value is set to False and the pipe's color is set to gray.

Set pipe color (Multiple alternatives):

xFFCCDD:V1 and not V2 and (MFC1 > 4.5 or V3) or V5
xDDBBAA:V3 or V4

Clone value and color (No expression): This is useful for multi-segment pipes where only one pipe needs evaluation; the remaining pipe segments reference the parent pipe.

P2:            # Clone the pipe's value and color

Clone color (With expression):

P1:V3 or V5    # Clones a pipe's color

Support

Open a ticket to bug fixes or feature requests.