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.

Related topics:

Implementing Annotations

Types of Annotations

Low-Level Coordinate System for Annotations

Annotation Objects - Automated Features

Help Version 20.0.2018.7.30
Products | Support | Contact Us | Copyright Notices
© 1991-2018 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Raster Imaging C API Help