OPTICKS-1602 - Scale Bar Improvements

[tclarke]

Users have requested the following improvements to the scale bar annotation:

1. Option to display the rounded whole number at the end of the scale bar or at the midpoint. Currently the whole number moves based on length of the annotation.
2. Adjust font size in the Scale bar annotation properties should update the text appropriately. Currently the font size only adjusts when the scale bar is resized.
3. Add option to select different scale bar styles, such as a line with labeled distance tick marks that are customizable (display distance labels on any end points, intermediate tick marks).

Original Issue: OPTICKS-1602
Status: Code Review
Feature Interpretation:

Suggested Solution:
Ad the following controls to teh ScaleBar properties dialog

1. Spinbox specifying the total length of teh scale bar in the desired display units. This will resize the scale bar to exactly that length.
2. Spinbox defining the number of labels (2=start/end, 3=start/middle/end, 4=start, 1/3, 2/3, end etc)
3. Combo box allowing user to select teh scale bar "style", which would be iether "classic" filled in boxes or new"line" style with tick marks

Actual Solution:
Same as suggested, but instead of specifying the number of labels the user selects the number of tick marks. There is a label for the left and right ends and the center tick mark if the exact center is marked (the center is not marked for the line style with an even number of tick marks). For the classic/bar scale style teh number of tick marks specifies the number of boxes dividing the first half of the scale bar. The second half of the scale bar is always one box. For the line style, the tick marks evenly divide the whole line. As the number of lines/boxes and style can now change. All of the properties are stored in teh scale bar object and not in the child objects as teh child objects will be recreated/destroyed.

Severity:
Version Control:
Environment:
Linked:

[github-actions]

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