Polygon Annotation Object

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.

The class for Polygon Annotation objects is LAnnPolygon.

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

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:

Property	Default value
Visible	Defaults to FALSE. It can be changed using the LAnnotation::SetVisible function.
Selected	Defaults to FALSE. It can be changed using the LAnnotation::SetSelected function.
Name	Defaults to an empty string. It can be changed using the LAnnotation::SetNameOptions function.
Line width	Defaults to 0.75 points. It can be changed using the LAnnXXX::SetLineWidth 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 LAnnXXX::SetLineStyle function.
ROP2 code	Defaults to ANNROP2_COPY. It can be changed using the LAnnotation::SetROP2 function.
Fill pattern	Defaults to solid. It can be changed using the LAnnAutomation::SetFillPattern function.
Fill mode	Defaults to transparent. It can be changed using the LAnnotation::SetFillMode function. Before calling this function enable the alpha background fill mode by calling the LAnnotation::SetOptions function.
Polygon fill mode	Defaults to winding. It can be changed using the LAnnPolygon::SetPolyFillMode function.
Foreground color	Defaults to red. It can be changed using the LAnnXXX::SetForeColor function.
Background color	Defaults to white. It can be changed using the LAnnXXX::SetBackColor function.
Nodes	Defaults to displaying every node. It can be changed using the LAnnXXX::SetNodes function.
Fixed State	Defaults to not fixed. It can be changed using the LAnnXXX::SetFixed function.
Hyperlink	Defaults to ANNLINK_NONE. It can be changed using the LAnnotation::SetHyperlink function.
Tag (identifier)	Defaults to 0. It can be changed using the LAnnotation::SetTag function.
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.

Polygon Annotation Object

See Also