LAnnAutomation::GetTicMarkLength

#include "ltwrappr.h"

virtual L_INT LAnnAutomation::GetTicMarkLength(pdLength)

L_DOUBLE *pdLength;

/* address of the variable to be updated */

Gets the length of the tic mark of an ANNOBJECT_RULER or ANNOBJECT_RULER. The tic marks are the perpendicular lines that measure the units.

Parameter	Description
pdLength	Address of the variable to be updated with the object's tic mark length.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes

Comments

The tic mark length applies only to the following annotation objects:

ANNOBJECT_AUTOMATION

ANNOBJECT_RULER

ANNOBJECT_POLYRULER

The dLength parameter is expressed in pixels, not in points. The length is for the whole line, not just from the intersection point with the ruler to the end point of the tic mark - it is from one end of the tic mark to the other end of the tic mark.

Note that a ruler can have tic marks of different lengths. For example, the ruler in the figure below has tic marks with several different lengths. In this case, pdLength is updated with the length of the longest tic mark.

$image\Ruler.gif$

Required DLLs and Libraries

LTANN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:	Class Members
Topics:	Annotation Functions: Object Properties
	Implementing Annotations
	Automated User Interface for Annotations
	Annotation Functions: Creating and Deleting Annotations
	Types of Annotations
	Annotation Functions: Implementing Custom Annotations
	Annotation Functions: Creating Custom Annotations
	Fixed Annotations
	Minimizing Flicker With Double Buffering
	Annotation Functions: Working with the Toolbar
	Key Annotation Features
	Calibrating Annotation Ruler Objects

Example

For an example, refer to LAnnAutomation::SetTicMarkLength.