L_AnnSetGaugeLength

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnSetGaugeLength(hObject, dLength, uFlags)

HANNOBJECT hObject;	/* handle to the annotation automation object */
L_DOUBLE dLength;	/* new length of the ruler object's gauge */
L_UINT uFlags;	/* flags that determine which objects to process */

Sets the length of the gauge (the perpendicular lines at the ends of the Ruler object).

This function is available in the Document and Medical Imaging toolkits.

Parameter	Description
hObject	Handle to the annotation automation object.
dLength	The new length of the ruler object's gauge.
uFlags	Flags that determine which objects to process. The following are valid values:
	Value	Meaning
	0	Process only the specified object.
	ANNFLAG_SELECTED	[0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the L_AnnGetSelected and L_AnnSetSelected functions.
	ANNFLAG_NOTTHIS	[0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.
	ANNFLAG_RECURSE	[0x0008] Process objects within a container, and within any subcontainers, down to any level.
	ANNFLAG_NOTCONTAINER	[0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.
	ANNFLAG_NOINVALIDATE	[0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.
	ANNFLAG_CHECKMENU	[0x0020] Process objects only if the ANNAUTOTEXT_MENU_RULER menu item has been selected.

Returns

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

Comments

The gauge length property applies only to Automation and Ruler objects. Refer to Annotation Automation Object.

DLength is expressed in pixels, not in points. The length is for the whole line, not just from the end point of the ruler to the end point of the gauge - it is from one end of the gauge to the other end of the gauge.

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

Windows 2000 / XP/Vista.

See Also

Functions:	L_AnnSetBitmapDpiX, L_AnnGetBitmapDpiX, L_AnnGetBitmapDpiY, L_AnnSetBitmapDpiY, L_AnnSetUnit, L_AnnGetUnit, L_AnnGetUnitLen, L_AnnGetDistance, L_AnnGetGaugeLength, L_AnnGetTicMarkLength, L_AnnSetTicMarkLength, L_AnnGetDistance2, ANNSMARTDISTANCE, L_AnnCalibrateRuler, L_AnnCalibrateRulerSuccessive
Topics:	Annotation Functions: Working with the Toolbar
	Implementing Annotations
	Automated User Interface for Annotations
	Annotation Objects - Default Values
	Annotation Objects - Automated Features
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Altering Annotation Object Settings
	Using Rulers in Annotation Objects
	Annotation Features
	Calibrating Annotation Ruler Objects

Example

 L_INT AnnSetGaugeLengthExample(HANNOBJECT hAnnObject,HANNOBJECT hContainer)
{
   L_INT nRet;
   L_DOUBLE dLength;

   /* if gauge length setting 
   is longer than 5 pixels, then make it 5 pixels. */
   nRet = L_AnnGetGaugeLength(hAnnObject, &dLength);
   if(nRet != SUCCESS)
      return nRet;
   if (dLength > 5.0f)
   {
      nRet = L_AnnSetGaugeLength(hAnnObject, 5.0f, 0);
      if(nRet != SUCCESS)
         return nRet;
      /* make all ruler objects the same. */
      nRet = L_AnnSetGaugeLength(hContainer, 5.0f, ANNFLAG_RECURSE);
      if(nRet != SUCCESS)
         return nRet;
   }
   return SUCCESS;
}