Ruler Annotation Object

Note: This topic is for Document/Medical only.

The ruler annotation object (ANNOBJECT_RULER) is a simple line with gauges on both ends for measuring distance. With the automated functions, the ruler is started on a mouse-down event and completed on a mouse-up event.

With low-level functions, you must provide the points that define the ruler. Other applicable properties have the following defaults, which you can change:

Visible	Defaults to FALSE. It can be changed using the AnnSetVisible method.
Selected	Defaults to FALSE. It can be changed using the AnnSetSelected method.
Font size	Defaults to 10 point, translated with a scaling factor of 1. It can be changed using the AnnSetFontSize method.
Font underline	Defaults to FALSE. It can be changed using the AnnSetFontUnderline method.
Font strikethrough	Defaults to FALSE. It can be changed using the AnnSetFontStrikethrough method.
Font italic	Defaults to FALSE. It can be changed using the AnnSetFontItalic method.
Font bold	Defaults to FALSE. It can be changed using the AnnSetFontBold method.
Font name	Defaults to "Arial". It can be changed using the AnnSetFontName method.
Foreground color	Defaults to black. It can be changed using the AnnSetForeColor method.
Line width	Defaults to 1. It can be changed using the AnnSetLineWidth method. (Values equate to a minimum of 1 pixel when displayed.)
Line style	Defaults to solid. It can be changed using the AnnSetLineStyle method.
Gauge length	Defaults to 30. It can be changed using the AnnSetGaugeLength method.
Unit	Defaults to ANNUNIT_MILIMETERS. It can be changed using AnnSetUnit method.
Unit abbreviation	Defaults to "mm". It can be changed using the AnnSetUnit method.
Precision	Defaults to 2. It can be changed using the AnnSetUnit method.
Tag (identifier)	Defaults to 0. It can be changed using the AnnSetTag method.
Window handle	Defaults to NULL or the handle inherited from the container.
User mode	Defaults to design mode or the mode inherited from the container.