L_AnnGetTicMarkLength

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#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetTicMarkLength(hObject, pdLength)

HANNOBJECT hObject;	/* handle to the annotation automation object */
L_DOUBLE *pdLength;	/* address of the variable to be updated */

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

Parameter	Description
hObject	Handle to the annotation automation object.
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.

Platforms

Win32, x64.

See Also

Functions:	L_AnnSetGaugeLength, L_AnnSetBitmapDpiX, L_AnnGetBitmapDpiX, L_AnnGetBitmapDpiY, L_AnnSetBitmapDpiY, L_AnnSetUnit, L_AnnGetUnit, L_AnnGetUnitLen, L_AnnGetDistance, L_AnnSetTicMarkLength, L_AnnCalibrateRuler, L_AnnCalibrateRulerSuccessive
Topics:	Annotation Functions: Working with the Toolbar
	Implementing Annotations
	Annotation Objects - Default Values
	Annotation Objects - Automated Features
	Automated User Interface for Annotations
	Implementing an Automated Annotation Program
	Obtaining Annotation Object Information
	Using Rulers in Annotation Objects
	Annotation Features
	Calibrating Annotation Ruler Objects

Example

For an Example, refer to L_AnnSetTicMarkLength.