LAnnText::AddUserHandle

#include "ltwrappr.h"

virtual L_INT LAnnText::AddUserHandle(pAnnHandle)

Adds a user-defined handle to an annotation object, where pAnnHandle is a pointer to the structure defining an annotation handle.

Returns

Comments

Before calling this function, you must create the LAnnText object.

Call this function one or more times to add user handles to an existing annotation object.

The user handle location can be defined using container coordinates or client coordinates.

Client coordinates factor in the current zoom factor, and the horizontal and vertical scrolling.

For more information on defining a user handle, see the documentation for the ANNHANDLE structure.

Required DLLs and Libraries

See Also

Example

// This example adds user handles to the center of the top and bottom lines of a Text object

L_INT LAnnText_AddUserHandleExample(LAnnText *pLText) 
{
	L_INT nRet;
   ANNHANDLE AnnHandle; 
   L_UINT uType; 
   ANNRECT arc; 
   
   uType = pLText->GetType();
   if (uType == ANNOBJECT_TEXT) 
   {
      nRet = pLText->GetRect(&arc, NULL); 
		if(nRet != SUCCESS)
			return nRet;
      memset(&AnnHandle, 0, sizeof(ANNHANDLE)); 
      AnnHandle.uStructSize   = sizeof(ANNHANDLE);  
      AnnHandle.nID           = 100; 
      AnnHandle.bVisible      = TRUE; 
      AnnHandle.crPen         = RGB(0,0,0); 
      AnnHandle.crFill        = RGB(255,0,0); 
      AnnHandle.nShape        = ANNHANDLE_SHAPE_CIRCLE; 
      AnnHandle.hCursor       = NULL; 
      AnnHandle.uFlags        =  ANNHANDLE_ID | ANNHANDLE_LOCATION | 
                                 ANNHANDLE_CONTAINER_COORDINATES | ANNHANDLE_VISIBLE | 
                                 ANNHANDLE_PEN_COLOR | ANNHANDLE_FILL_COLOR | ANNHANDLE_SHAPE; 
      
      AnnHandle.aptContainer.x = (arc.left + arc.right)/2; 
      AnnHandle.aptContainer.y = arc.top; 
      nRet = pLText->AddUserHandle(&AnnHandle); 
		if(nRet != SUCCESS)
			return nRet;
      AnnHandle.aptContainer.x = (arc.left + arc.right)/2; 
      AnnHandle.aptContainer.y = arc.bottom; 
      nRet = pLText->AddUserHandle(&AnnHandle); 
		if(nRet != SUCCESS)
			return nRet;
   }
   else
	{
      MessageBox(NULL, TEXT("Annotation object must be a Text object."), TEXT("Error"), MB_OK); 
		return FAILURE;
	}
	return SUCCESS;
}