
Graphics in the Dashboard

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One of the advances of DBII over DB1 is that DBII supports
arbitrary graphical decoration of the dashboard surface;
and the graphical decorations support conditional configuration
based on KTL keywords.

The types of graphic available are:

Text
Line
Rectangle
Oval
Arc
Pie
Chord
Polygon
Bitmap

and you can use the attribute editor to edit any of their
characteristics.  They are all standard Tk canvas objects,
so either the Welch or Ousterhout book should tell you all
you need to know about the attributes.

Pie and Chord are subtypes of the canvas 'arc' object which for 
convenience I have treated as separate object types.

You can create graphics by using the popup menu bound to
Mouse-3 on empty canvas area.  It will offer you the complete
list of graphic types.

Graphics behave very analogously to Meters.


