A Dashboard with on-line configuration :

• edit descriptor
• on save of it, dahboard reloads the configuration

Should work anywhere Ruby-Gtk work.

> gem install gtk3
> gem install Ruiby
> git clone https://github.com/glurp/gtk-dashboard.git
> cd gtk-dashboard
> cd lib
> ruby show.rb  descr.rb

       ----------      -------------------     --------
       |Producer|      | memory-database |     |widget|
       |        |      |     rtdb        |     |      |
       |        |      |                 |Read |------|
       |--------|Write |                 |====>| Plot |====> Main-Window
       |  MQTT  |=====>|                 |(sub)|------|
       |connect.| (pub)|                 |     |      |
       |--------|      |                 |     |      |
       |        |      |                 |     |      |
       |        |      |                 |     |      |
       ----------      -------------------     --------

RTDB use read/write and Publish/Subscribe pattern.

All these elements are in one, simple process, which manage Gtk main window.

Producer, database, widgets are descibe with a ruby file descriptor. Descriptor contain also the CSS of the application.

{
    bddtr: {
        <varname> : {....}, 
        bb: {type: Float, value: 0},
    },
    production: [
        {type: ProdSystem,... },
        {type: ProdPipeNum, ... },
        {type: ProdRuby, ... },
    ],
    window: {
     page1: {
        1 => {
          1 =>  proc {|e| e.nb(10,"nb Frame","pgrep -laf appli_sim") },
          2 =>  proc {|e| e.fsize(10,"size-logs","../logs/log*.txt")  },
        }
     }
   }
   css; <<EEND
* { ... }
EEND
}

RTDB contain the list of variable in database. (Variables are String/Float/Int, no structurd data).

Produceur declare all connector. They are 3 type/family of connector:

• ProdSystem : data came from a system commande.
• ProdPipeNum: data are numerics values out of pipe ( exemple : vmtat 1)
• ProdRuby : A ruby generate value for Rtdb. the Dashboard call this traitment periodcly (as ProSystem)

Windows entry specify the widgets.

• They are organise in row/column table : r1 { cel1 proc {} , cell1 proc {} ..} r2 { ... } r3 { ... }

All widget are specified by proc. A helper is provided, 'e' context variable, which is the manager of all widgets (see E class in widgets/engine.rb)

On first version, widget get data, they were no memory-database,

• e.nb : execute a system command and count the line output, show "label : value"
• e.fsize: count the number of line of all files globed by parameter
• e.bd : show rtdb variable content in a label

In new version, database act as middleware

Widget which use rtdb are :

• Bd
• List
• Plot
• Gauge
• List
• Map

• Map widget
• rtdb
• verify the desriptor, for minimise error() popup
• subsciption on all widget using rtdb
• multiple pad
• test unit
• bin tool for run from anywhere
• gem ! (?)