Closed Curve Annotation Object

The Closed Curve annotation object (ANNOBJECT_CURVECLOSED) is a sequence of points that are joined by cubic polynomials such that adjacent polynomials are continuous at the first and second derivates. Unlike the Curve annotation object, the first and last endpoints are also joined by a curve. The result is a smooth, continuous closed curve going through all the points.

With the automated functions, each curve is formed with a mouse click, and the object is completed on a double click.

You can change the points using LAnnCurveClosed::GetPoints and LAnnCurveClosed::SetPoints.

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:

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 LAnnAutomation::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 LAnnContainer::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 LAnnAutomation::SetPolyFillMode function.

Foreground color

Defaults to red. It can be changed using the LAnnotation::SetForeColor function.

Background color

Defaults to white. It can be changed using the LAnnotation::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.

Related topics:

Implementing Annotations.

Types of Annotations.

Low-Level Coordinate System for Annotations.

Annotation Objects - Automated Features

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