Polygon Annotation Object

(Document and Medical Imaging toolkits)

The Polygon annotation object (ANNOBJECT_POLYGON) is an array of points that defines the vertices of a polygon. With the automated functions, each line segment is formed with a mouse click, and the object is completed on a double click, which closes the polygon with a line from the last point to the first point.

You can change the points using the L_AnnGetPoints and the L_AnnSetPoints functions.

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

Visible	Defaults to FALSE. It can be changed using the L_AnnSetVisible function.
Selected	Defaults to FALSE. It can be changed using the L_AnnSetSelected function.
Name	Defaults to an empty string. It can be changed using the L_AnnSetNameOptions function.
Line width	Defaults to 0.75 points. It can be changed using the L_AnnSetLineWidth function. (Note that when displayed, the line must have a minimum width of 1 pixel.)
Line style	Defaults to solid. It can be changed using the L_AnnSetLineStyle function.
ROP2 code	Defaults to ANNROP2_COPY. It can be changed using the L_AnnSetROP2 function.
Fill pattern	Defaults to solid. It can be changed using the L_AnnSetFillPattern function.
Fill mode	Defaults to transparent. It can be changed using the L_AnnSetFillMode function. Before calling this function enable the alpha background fill mode by calling the L_AnnSetOptions function.
Polygon fill mode	Defaults to winding. It can be changed using the L_AnnSetPolyFillMode function.
Foreground color	Defaults to red. It can be changed using the L_AnnSetForeColor function.
Background color	Defaults to white. It can be changed using the L_AnnSetBackColor function. The default does not affect highlight, redaction, or note objects.
Nodes	Defaults to displaying every node. It can be changed using the L_AnnSetNodes function.
Fixed State	Defaults to not fixed. It can be changed using the L_AnnSetFixed function.
Hyperlink	Defaults to None. It can be changed using the L_AnnSetHyperlink function.
Tag (identifier)	Defaults to 0. It can be changed using the L_AnnSetTag function.
Window handle	Defaults to NULL or the handle inherited from the container. It can be changed for all objects using the L_AnnSetWnd function.
User mode	Defaults to design mode or the mode inherited from the container. It can be changed for all objects using the L_AnnSetUserMode function.

For information on flipping, reversing or rotating annotation objects, refer to Flipping, Reversing and Rotating Annotation Objects.