#884 Annotation anchor box should have style controls

[Jeremy Faden]

Ivar asked about more controls for the annotations, like being able to have dotted lines. The anchor box should have controls for:

• thickness
• color
• style (dotted, dashed)
• fill
• fillStyle (hash)
• shape (rectangle, rounded corners, ellipse)
• outer glow, reverse (shade region outside anchor box)

These are a lot of controls, and I wonder if a "anchorStyle" string property and GUI editor would keep it all managable. Also looking at HTML CSS style sheets might be useful, since they have a single line with all the controls.

[Jeremy Faden]

I think the thing to do is to introduce "anchorStyle" which controls how the anchor box (area) will be rendered. This would be a semicolon-delimited string of name=value pairs like:

color=blue;lineWidth=2px;lineStyle=dashed;fillColor=#400000ff

The goal would be to have a generic style which will be useful in other parts of Autoplot, eventually, and there could be an editor to support these.