Polygon Annotation Object

Note:

This topic is for Document/Medical only.

The polygon annotation object (ANNOBJECT_POLYGON) is an array of points that define 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 points can be changed using the AnnGetPointX method, AnnGetPointY method and AnnSetPoints method.

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 AnnSetVisible method.

Selected

Defaults to FALSE. It can be changed using the AnnSetSelected method.

Name

Defaults to empty string. It can be changed using the AnnSetNameOptions method.

Line width

Defaults to 0.75 points. It can be changed using the AnnSetLineWidth method. (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 AnnSetLineStyle method.

ROP2 code

Defaults to Copy. It can be changed using the AnnSetROP2 method.

Fill pattern

Defaults to solid. It can be changed using the AnnSetFillPattern method.

Fill mode

Defaults to transparent. It can be changed using the AnnSetFillMode method.

Polygon fill mode

Defaults to winding. It can be changed using the AnnSetPolyFillMode method.

Foreground color

Defaults to red. It can be changed using the AnnSetForeColor method.

Background color

Defaults to white. It can be changed using the AnnSetBackColor method.

Nodes

Defaults to displaying every node. It can be changed using the AnnSetNodes method.

Fixed State

Defaults to not fixed. It can be changed using the AnnFixed property.

Hyperlink

Defaults to None. It can be changed using the AnnSetHyperlinkString 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. It can be changed for all objects using the AnnSetWnd method.

User mode

Defaults to design mode or the mode inherited from the container. It can be changed for all objects using the AnnUserMode property.

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

Related topics:

image\sqrblit.gif Implementing Annotations.

image\sqrblit.gif Types of Annotations.

image\sqrblit.gif Low-Level Coordinate System for Annotations.

image\sqrblit.gif Displaying and Manipulating Annotation Objects