L_AnnGetRgnHandle

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetRgnHandle(hObject, pXForm, phRgn)

HANNOBJECT hObject;	/* handle to the annotation object */
pRGNXFORM pXForm;	/* pointer to a coordinate translation structure */
HRGN *phRgn;	/* address of the variable to be updated */

Creates a region from the specified annotation object and retrieves a handle to that region.

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

Parameter	Description
hObject	Handle to the annotation object from which the region will be created.
pXForm	Pointer to an RGNXFORM structure that LEADTOOLS uses to translate between display coordinates and bitmap coordinates.
	If you specify NULL in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to TOP_LEFT.
phRgn	Address of the variable to be updated with the handle to the region, if the function is successful.

Returns

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

Comments

You can create regions from the following annotation objects:

ANNOBJECT_FREEHANDHOTSPOT

When working with the RGNXFORM structure in this function, consider the following:

the annotations are always TOP_LEFT.
the bitmap is missing, so the bitmap rectangle is replaced with the object rectangle.
it is easier to work with this function using TOP_LEFT as the ViewPerspective.

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

Topics:	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Obtaining Annotation Object Information
	Annotation Functions (Document/Medical only): Object Information

Example

L_INT EXT_CALLBACK AnnGetRgnHandleExample(HANNOBJECT  hObject,
                                          L_VOID*     pUserData)
{
   UNREFERENCED_PARAMETER(pUserData);
   HRGN        hRgn;
   RGNXFORM    XForm;
   L_INT       nRet;

   XForm.uViewPerspective  = BOTTOM_LEFT;
   XForm.nXScalarNum       = XForm.nXScalarDen = 1;
   XForm.nYScalarNum       = XForm.nYScalarDen = 1;
   XForm.nXOffset          = XForm.nYOffset = 0;

   nRet = L_AnnGetRgnHandle(hObject, &XForm, &hRgn);
   if (nRet == SUCCESS)
   {
      MessageBox(NULL, TEXT("Got region handle."), TEXT(""), MB_OK);

   }
   return SUCCESS;
}

L_VOID AnnGetRgnHandleExample_Call(HANNOBJECT hContainer)
{
   L_AnnEnumerate(hContainer, (ANNENUMCALLBACK)AnnGetRgnHandleExample, NULL, ANNFLAG_SELECTED | ANNFLAG_NOTTHIS, 0);
}