L_AnnGetScalarX

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetScalarX(hObject, pdScalarX)

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

Gets the horizontal scaling factor that is applied to the annotation object. Typically, the scaling factors are applied to a root container so that the annotations will match the displayed image. This function is available in the Document/Medical Toolkits.

Parameter	Description
hObject	Handle to the annotation object.
pdScalarX	Address of the variable to be updated with the horizontal scaling factor.

Returns

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

Comments

Offset values, which are set by the L_AnnSetOffsetX and L_AnnSetOffsetY functions, are applied after the scalar properties. For more information, refer to Low-Level Coordinate System for Annotations.

Before calling this function, you must declare a variable of data type L_DOUBLE. Then, pass the address of the variable in the pdScalarX parameter. This function will update the variable with the horizontal scaling factor.

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_AnnSetScalarX, L_AnnSetScalarY, L_AnnGetScalarY, L_AnnSetOffsetX, L_AnnSetOffsetY, L_AnnGetOffsetX, L_AnnGetOffsetY, L_AnnGetFixed, L_AnnSetFixed, L_AnnPushFixedState, L_AnnPopFixedState, L_AnnIsFixedInRect
Topics:	Annotation Functions: Getting and Setting Geometric Properties
	Low-Level Coordinate System for Annotations
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Fixed Annotations
	Minimizing Flicker with Double Buffering
	Obtaining Annotation Object Information

Example

This example displays the current annotation scalars as percentages.

 L_INT AnnGetScalarXExample(HANNOBJECT hContainer)/* Container annotation object */
{
   L_INT nRet;
   L_INT       XPercent, YPercent;  /* X and Y scale percentage */
   L_DOUBLE    XScalar, YScalar;    /* X and Y floating point scalars */
   L_TCHAR     szMessage[80];       /* Message buffer */

   /* Get the floating point scalars */
   nRet = L_AnnGetScalarX(hContainer, &XScalar);
   if(nRet != SUCCESS)
      return nRet;
   nRet = L_AnnGetScalarY(hContainer, &YScalar);
   if(nRet != SUCCESS)
      return nRet;
   /* Convert the scalars to percentages */
   XPercent = (L_INT)(XScalar * 100);
   YPercent = (L_INT)(YScalar * 100);
   /* Display the percentages in a message */
   wsprintf (szMessage, TEXT("%d percent X and %d percent Y"), XPercent, YPercent);
   MessageBox (NULL, szMessage, TEXT("Notice"), MB_OK);
   return SUCCESS;
}